./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.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 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 18:17:57,389 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 18:17:57,474 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 18:17:57,481 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 18:17:57,482 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 18:17:57,510 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 18:17:57,511 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 18:17:57,512 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 18:17:57,512 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 18:17:57,514 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 18:17:57,514 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 18:17:57,515 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 18:17:57,515 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 18:17:57,515 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 18:17:57,516 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 18:17:57,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 18:17:57,516 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 18:17:57,516 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 18:17:57,517 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 18:17:57,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 18:17:57,522 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 18:17:57,526 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 18:17:57,526 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 18:17:57,526 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 18:17:57,526 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 18:17:57,526 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 18:17:57,527 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 18:17:57,527 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 18:17:57,527 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 18:17:57,527 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 18:17:57,528 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 18:17:57,528 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 18:17:57,528 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 18:17:57,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 18:17:57,528 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 18:17:57,529 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 18:17:57,529 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 18:17:57,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 18:17:57,535 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 18:17:57,535 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 18:17:57,536 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 18:17:57,536 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 18:17:57,536 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2024-10-14 18:17:58,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 18:17:58,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 18:17:58,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 18:17:58,102 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 18:17:58,102 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 18:17:58,103 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2024-10-14 18:17:59,837 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 18:18:00,111 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 18:18:00,114 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2024-10-14 18:18:00,137 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0780bfe7/c895d21f3c484bb185152b919cc7f749/FLAG10ca2b02e [2024-10-14 18:18:00,403 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0780bfe7/c895d21f3c484bb185152b919cc7f749 [2024-10-14 18:18:00,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 18:18:00,407 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 18:18:00,408 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 18:18:00,409 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 18:18:00,414 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 18:18:00,414 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:00,415 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61a3efa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00, skipping insertion in model container [2024-10-14 18:18:00,415 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:00,458 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 18:18:00,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 18:18:00,826 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 18:18:00,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 18:18:00,964 INFO L204 MainTranslator]: Completed translation [2024-10-14 18:18:00,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00 WrapperNode [2024-10-14 18:18:00,974 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 18:18:00,976 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 18:18:00,976 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 18:18:00,976 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 18:18:00,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:01,017 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:01,088 INFO L138 Inliner]: procedures = 129, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 136 [2024-10-14 18:18:01,088 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 18:18:01,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 18:18:01,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 18:18:01,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 18:18:01,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:01,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:01,114 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:01,152 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 6, 5]. 46 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 4 writes are split as follows [0, 3, 1]. [2024-10-14 18:18:01,153 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:01,153 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:01,163 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:01,168 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:01,170 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:01,175 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:01,178 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 18:18:01,182 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 18:18:01,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 18:18:01,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 18:18:01,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (1/1) ... [2024-10-14 18:18:01,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 18:18:01,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:01,216 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) [2024-10-14 18:18:01,219 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 [2024-10-14 18:18:01,262 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-10-14 18:18:01,263 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-10-14 18:18:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 18:18:01,263 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2024-10-14 18:18:01,263 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2024-10-14 18:18:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 18:18:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 18:18:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-14 18:18:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-14 18:18:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-14 18:18:01,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-14 18:18:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-14 18:18:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-14 18:18:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 18:18:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-14 18:18:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-14 18:18:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-14 18:18:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 18:18:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 18:18:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 18:18:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 18:18:01,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 18:18:01,412 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 18:18:01,414 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 18:18:01,438 INFO L733 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-10-14 18:18:01,727 INFO L? ?]: Removed 89 outVars from TransFormulas that were not future-live. [2024-10-14 18:18:01,728 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 18:18:01,773 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 18:18:01,773 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-14 18:18:01,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:18:01 BoogieIcfgContainer [2024-10-14 18:18:01,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 18:18:01,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 18:18:01,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 18:18:01,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 18:18:01,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:18:00" (1/3) ... [2024-10-14 18:18:01,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da16d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:18:01, skipping insertion in model container [2024-10-14 18:18:01,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:18:00" (2/3) ... [2024-10-14 18:18:01,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da16d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:18:01, skipping insertion in model container [2024-10-14 18:18:01,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:18:01" (3/3) ... [2024-10-14 18:18:01,783 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2024-10-14 18:18:01,799 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 18:18:01,800 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2024-10-14 18:18:01,843 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 18:18:01,849 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;@1328a9dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 18:18:01,850 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-10-14 18:18:01,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 70 states have internal predecessors, (87), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:18:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 18:18:01,861 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:01,861 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:01,862 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:01,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash 640141679, now seen corresponding path program 1 times [2024-10-14 18:18:01,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:01,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996065349] [2024-10-14 18:18:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:01,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:02,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:18:02,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996065349] [2024-10-14 18:18:02,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996065349] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:02,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:02,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 18:18:02,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687112719] [2024-10-14 18:18:02,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:02,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 18:18:02,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:02,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 18:18:02,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 18:18:02,065 INFO L87 Difference]: Start difference. First operand has 76 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 70 states have internal predecessors, (87), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-14 18:18:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:02,104 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2024-10-14 18:18:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 18:18:02,107 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 11 [2024-10-14 18:18:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:02,113 INFO L225 Difference]: With dead ends: 75 [2024-10-14 18:18:02,113 INFO L226 Difference]: Without dead ends: 70 [2024-10-14 18:18:02,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 18:18:02,118 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:02,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 18:18:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-14 18:18:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-10-14 18:18:02,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 65 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) [2024-10-14 18:18:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2024-10-14 18:18:02,152 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 11 [2024-10-14 18:18:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:02,153 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2024-10-14 18:18:02,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2024-10-14 18:18:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2024-10-14 18:18:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-14 18:18:02,154 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:02,154 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:02,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 18:18:02,155 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:02,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:02,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1371312458, now seen corresponding path program 1 times [2024-10-14 18:18:02,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:02,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391656351] [2024-10-14 18:18:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:02,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:02,333 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:18:02,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:02,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391656351] [2024-10-14 18:18:02,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391656351] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:02,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:02,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 18:18:02,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608807496] [2024-10-14 18:18:02,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:02,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 18:18:02,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:02,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 18:18:02,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 18:18:02,353 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:18:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:02,411 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2024-10-14 18:18:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 18:18:02,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-14 18:18:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:02,415 INFO L225 Difference]: With dead ends: 69 [2024-10-14 18:18:02,416 INFO L226 Difference]: Without dead ends: 69 [2024-10-14 18:18:02,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 18:18:02,419 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:02,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 18:18:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-14 18:18:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-10-14 18:18:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 64 states have internal predecessors, (72), 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) [2024-10-14 18:18:02,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2024-10-14 18:18:02,435 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 13 [2024-10-14 18:18:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:02,438 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2024-10-14 18:18:02,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:18:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2024-10-14 18:18:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-14 18:18:02,441 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:02,441 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:02,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 18:18:02,441 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:02,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:02,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1371312457, now seen corresponding path program 1 times [2024-10-14 18:18:02,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:02,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162178706] [2024-10-14 18:18:02,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:02,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:02,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:18:02,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:02,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162178706] [2024-10-14 18:18:02,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162178706] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:02,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:02,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 18:18:02,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461294227] [2024-10-14 18:18:02,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:02,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 18:18:02,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 18:18:02,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 18:18:02,674 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:18:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:02,739 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2024-10-14 18:18:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 18:18:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-14 18:18:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:02,741 INFO L225 Difference]: With dead ends: 68 [2024-10-14 18:18:02,741 INFO L226 Difference]: Without dead ends: 68 [2024-10-14 18:18:02,741 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 18:18:02,743 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:02,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:02,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-14 18:18:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-10-14 18:18:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 63 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) [2024-10-14 18:18:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2024-10-14 18:18:02,751 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 13 [2024-10-14 18:18:02,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:02,751 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2024-10-14 18:18:02,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:18:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2024-10-14 18:18:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-14 18:18:02,753 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:02,753 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:02,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 18:18:02,753 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:02,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:02,754 INFO L85 PathProgramCache]: Analyzing trace with hash -552349077, now seen corresponding path program 1 times [2024-10-14 18:18:02,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:02,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753062340] [2024-10-14 18:18:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:02,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:02,911 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:02,993 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-14 18:18:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:18:03,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:03,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753062340] [2024-10-14 18:18:03,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753062340] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:03,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242210061] [2024-10-14 18:18:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:03,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:03,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:03,014 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) [2024-10-14 18:18:03,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 18:18:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:03,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 18:18:03,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:18:03,253 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 18:18:03,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242210061] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:03,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 18:18:03,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-10-14 18:18:03,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745877448] [2024-10-14 18:18:03,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:03,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 18:18:03,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:03,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 18:18:03,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-10-14 18:18:03,259 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:18:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:03,384 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2024-10-14 18:18:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 18:18:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 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 22 [2024-10-14 18:18:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:03,386 INFO L225 Difference]: With dead ends: 70 [2024-10-14 18:18:03,386 INFO L226 Difference]: Without dead ends: 70 [2024-10-14 18:18:03,387 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-10-14 18:18:03,388 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 1 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 330 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 [2024-10-14 18:18:03,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 330 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-14 18:18:03,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-10-14 18:18:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.697674418604651) internal successors, (73), 65 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) [2024-10-14 18:18:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2024-10-14 18:18:03,403 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 22 [2024-10-14 18:18:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:03,404 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2024-10-14 18:18:03,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:18:03,404 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2024-10-14 18:18:03,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 18:18:03,405 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:03,405 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] [2024-10-14 18:18:03,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 18:18:03,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:03,607 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:03,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1678326869, now seen corresponding path program 1 times [2024-10-14 18:18:03,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:03,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636989004] [2024-10-14 18:18:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:03,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:03,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:03,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 18:18:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 18:18:03,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:03,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636989004] [2024-10-14 18:18:03,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636989004] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:03,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:03,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 18:18:03,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681330162] [2024-10-14 18:18:03,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:03,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 18:18:03,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:03,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 18:18:03,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 18:18:03,806 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-10-14 18:18:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:03,872 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2024-10-14 18:18:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 18:18:03,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 26 [2024-10-14 18:18:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:03,874 INFO L225 Difference]: With dead ends: 79 [2024-10-14 18:18:03,876 INFO L226 Difference]: Without dead ends: 79 [2024-10-14 18:18:03,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 18:18:03,878 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 47 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:03,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 76 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:03,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-14 18:18:03,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2024-10-14 18:18:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 63 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) [2024-10-14 18:18:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2024-10-14 18:18:03,887 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 26 [2024-10-14 18:18:03,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:03,887 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2024-10-14 18:18:03,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-10-14 18:18:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2024-10-14 18:18:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 18:18:03,888 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:03,888 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:03,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 18:18:03,888 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:03,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:03,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1678326868, now seen corresponding path program 1 times [2024-10-14 18:18:03,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:03,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131977499] [2024-10-14 18:18:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:03,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:04,061 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:04,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-14 18:18:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:18:04,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:04,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131977499] [2024-10-14 18:18:04,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131977499] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:04,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757611422] [2024-10-14 18:18:04,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:04,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:04,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:04,122 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) [2024-10-14 18:18:04,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 18:18:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:04,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 18:18:04,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:18:04,283 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:18:04,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757611422] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:18:04,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:18:04,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-10-14 18:18:04,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092087654] [2024-10-14 18:18:04,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:04,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 18:18:04,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:04,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 18:18:04,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-14 18:18:04,488 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 15 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 18:18:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:04,906 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2024-10-14 18:18:04,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 18:18:04,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2024-10-14 18:18:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:04,913 INFO L225 Difference]: With dead ends: 89 [2024-10-14 18:18:04,913 INFO L226 Difference]: Without dead ends: 89 [2024-10-14 18:18:04,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-10-14 18:18:04,920 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 26 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:04,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 605 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 18:18:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-10-14 18:18:04,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2024-10-14 18:18:04,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 67 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) [2024-10-14 18:18:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2024-10-14 18:18:04,936 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 26 [2024-10-14 18:18:04,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:04,937 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2024-10-14 18:18:04,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 18:18:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2024-10-14 18:18:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-14 18:18:04,944 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:04,945 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:04,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 18:18:05,145 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,SelfDestructingSolverStorable5 [2024-10-14 18:18:05,147 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:05,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1602163948, now seen corresponding path program 2 times [2024-10-14 18:18:05,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:05,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004640927] [2024-10-14 18:18:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:05,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:05,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:05,659 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:18:05,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:05,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004640927] [2024-10-14 18:18:05,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004640927] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:05,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331226668] [2024-10-14 18:18:05,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 18:18:05,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:05,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:05,672 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) [2024-10-14 18:18:05,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 18:18:05,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 18:18:05,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 18:18:05,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 18:18:05,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:05,818 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 [2024-10-14 18:18:05,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:18:05,851 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 [2024-10-14 18:18:05,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:18:05,897 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 [2024-10-14 18:18:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 18:18:06,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 18:18:06,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331226668] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:18:06,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:18:06,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 9 [2024-10-14 18:18:06,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609000420] [2024-10-14 18:18:06,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:06,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 18:18:06,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:06,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 18:18:06,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:18:06,282 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 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) [2024-10-14 18:18:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:06,373 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2024-10-14 18:18:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 18:18:06,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 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 30 [2024-10-14 18:18:06,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:06,375 INFO L225 Difference]: With dead ends: 70 [2024-10-14 18:18:06,375 INFO L226 Difference]: Without dead ends: 70 [2024-10-14 18:18:06,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2024-10-14 18:18:06,376 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 172 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:06,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 73 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-14 18:18:06,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-10-14 18:18:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.553191489361702) internal successors, (73), 65 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) [2024-10-14 18:18:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2024-10-14 18:18:06,380 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 30 [2024-10-14 18:18:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:06,381 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2024-10-14 18:18:06,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 10 states have internal predecessors, (47), 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) [2024-10-14 18:18:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2024-10-14 18:18:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-14 18:18:06,382 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:06,382 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:06,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 18:18:06,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:06,584 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:06,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:06,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2081349893, now seen corresponding path program 1 times [2024-10-14 18:18:06,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:06,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816999549] [2024-10-14 18:18:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:06,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:06,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:06,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 18:18:06,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:06,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816999549] [2024-10-14 18:18:06,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816999549] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:06,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:06,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 18:18:06,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852424111] [2024-10-14 18:18:06,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:06,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 18:18:06,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:06,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 18:18:06,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 18:18:06,712 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-10-14 18:18:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:06,823 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2024-10-14 18:18:06,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 18:18:06,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 32 [2024-10-14 18:18:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:06,827 INFO L225 Difference]: With dead ends: 107 [2024-10-14 18:18:06,828 INFO L226 Difference]: Without dead ends: 107 [2024-10-14 18:18:06,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 18:18:06,828 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 39 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:06,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 167 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-14 18:18:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2024-10-14 18:18:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.6290322580645162) internal successors, (101), 80 states have internal predecessors, (101), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 18:18:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2024-10-14 18:18:06,842 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 32 [2024-10-14 18:18:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:06,842 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2024-10-14 18:18:06,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-10-14 18:18:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2024-10-14 18:18:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-14 18:18:06,843 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:06,843 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:06,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 18:18:06,844 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:06,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2081349894, now seen corresponding path program 1 times [2024-10-14 18:18:06,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:06,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291895753] [2024-10-14 18:18:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:06,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:07,037 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:07,042 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 18:18:07,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:07,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291895753] [2024-10-14 18:18:07,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291895753] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:07,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:07,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 18:18:07,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289568382] [2024-10-14 18:18:07,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:07,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 18:18:07,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:07,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 18:18:07,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 18:18:07,060 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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) [2024-10-14 18:18:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:07,253 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2024-10-14 18:18:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 18:18:07,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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 32 [2024-10-14 18:18:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:07,255 INFO L225 Difference]: With dead ends: 107 [2024-10-14 18:18:07,255 INFO L226 Difference]: Without dead ends: 107 [2024-10-14 18:18:07,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:18:07,257 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 38 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:07,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 215 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 18:18:07,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-14 18:18:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2024-10-14 18:18:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 80 states have internal predecessors, (100), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 18:18:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2024-10-14 18:18:07,267 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 32 [2024-10-14 18:18:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:07,267 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2024-10-14 18:18:07,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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) [2024-10-14 18:18:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2024-10-14 18:18:07,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-14 18:18:07,268 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:07,268 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:07,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 18:18:07,268 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:07,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:07,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1277440306, now seen corresponding path program 1 times [2024-10-14 18:18:07,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:07,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70322681] [2024-10-14 18:18:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:07,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:07,479 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:07,483 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:18:07,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:07,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70322681] [2024-10-14 18:18:07,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70322681] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:07,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633277020] [2024-10-14 18:18:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:07,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:07,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:07,491 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) [2024-10-14 18:18:07,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 18:18:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:07,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 18:18:07,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:07,595 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 [2024-10-14 18:18:07,621 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-14 18:18:07,622 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 [2024-10-14 18:18:07,661 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 [2024-10-14 18:18:07,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-10-14 18:18:07,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-14 18:18:07,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 18:18:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:18:07,918 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:08,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633277020] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:08,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:18:08,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2024-10-14 18:18:08,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657508616] [2024-10-14 18:18:08,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:08,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 18:18:08,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:08,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 18:18:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-10-14 18:18:08,035 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 14 states have internal predecessors, (41), 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) [2024-10-14 18:18:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:08,464 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2024-10-14 18:18:08,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 18:18:08,464 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 14 states have internal predecessors, (41), 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) Word has length 34 [2024-10-14 18:18:08,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:08,465 INFO L225 Difference]: With dead ends: 136 [2024-10-14 18:18:08,465 INFO L226 Difference]: Without dead ends: 136 [2024-10-14 18:18:08,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-10-14 18:18:08,466 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 81 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:08,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 534 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 18:18:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-14 18:18:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 99. [2024-10-14 18:18:08,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.6027397260273972) internal successors, (117), 92 states have internal predecessors, (117), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-14 18:18:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2024-10-14 18:18:08,471 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 34 [2024-10-14 18:18:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:08,471 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2024-10-14 18:18:08,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 14 states have internal predecessors, (41), 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) [2024-10-14 18:18:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2024-10-14 18:18:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-14 18:18:08,472 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:08,472 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:08,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 18:18:08,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:08,677 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:08,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:08,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1277440305, now seen corresponding path program 1 times [2024-10-14 18:18:08,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:08,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663467088] [2024-10-14 18:18:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:08,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:08,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:08,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:18:09,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:09,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663467088] [2024-10-14 18:18:09,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663467088] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:09,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172812034] [2024-10-14 18:18:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:09,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:09,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:09,004 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) [2024-10-14 18:18:09,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 18:18:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:09,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-14 18:18:09,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:09,110 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 [2024-10-14 18:18:09,115 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 [2024-10-14 18:18:09,226 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:18:09,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:18:09,235 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 [2024-10-14 18:18:09,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:18:09,319 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 15 treesize of output 1 [2024-10-14 18:18:09,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2024-10-14 18:18:09,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 18:18:09,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-14 18:18:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:18:09,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:09,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2024-10-14 18:18:09,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2024-10-14 18:18:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:18:10,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172812034] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:18:10,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:18:10,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 23 [2024-10-14 18:18:10,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499681134] [2024-10-14 18:18:10,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:10,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 18:18:10,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:10,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 18:18:10,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2024-10-14 18:18:10,228 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 18:18:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:10,902 INFO L93 Difference]: Finished difference Result 138 states and 167 transitions. [2024-10-14 18:18:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 18:18:10,903 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2024-10-14 18:18:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:10,904 INFO L225 Difference]: With dead ends: 138 [2024-10-14 18:18:10,904 INFO L226 Difference]: Without dead ends: 138 [2024-10-14 18:18:10,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2024-10-14 18:18:10,906 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 84 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:10,906 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 752 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 18:18:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-10-14 18:18:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 97. [2024-10-14 18:18:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.591549295774648) internal successors, (113), 90 states have internal predecessors, (113), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-14 18:18:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2024-10-14 18:18:10,915 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 34 [2024-10-14 18:18:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:10,916 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2024-10-14 18:18:10,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 18:18:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2024-10-14 18:18:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-14 18:18:10,917 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:10,917 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-14 18:18:10,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 18:18:11,117 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,SelfDestructingSolverStorable10 [2024-10-14 18:18:11,118 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:11,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:11,119 INFO L85 PathProgramCache]: Analyzing trace with hash -947832470, now seen corresponding path program 1 times [2024-10-14 18:18:11,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:11,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187093628] [2024-10-14 18:18:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:11,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:11,196 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:11,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 18:18:11,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:11,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187093628] [2024-10-14 18:18:11,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187093628] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:11,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:11,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 18:18:11,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868156017] [2024-10-14 18:18:11,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:11,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 18:18:11,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:11,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 18:18:11,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 18:18:11,209 INFO L87 Difference]: Start difference. First operand 97 states and 123 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2024-10-14 18:18:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:11,280 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2024-10-14 18:18:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 18:18:11,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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 35 [2024-10-14 18:18:11,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:11,283 INFO L225 Difference]: With dead ends: 120 [2024-10-14 18:18:11,283 INFO L226 Difference]: Without dead ends: 120 [2024-10-14 18:18:11,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:18:11,284 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 40 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:11,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 280 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-14 18:18:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2024-10-14 18:18:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.5694444444444444) internal successors, (113), 91 states have internal predecessors, (113), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-14 18:18:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2024-10-14 18:18:11,288 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 35 [2024-10-14 18:18:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:11,289 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2024-10-14 18:18:11,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2024-10-14 18:18:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2024-10-14 18:18:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-14 18:18:11,290 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:11,290 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:11,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-14 18:18:11,290 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:11,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash 740585047, now seen corresponding path program 2 times [2024-10-14 18:18:11,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:11,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928343730] [2024-10-14 18:18:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:11,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:11,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:11,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:18:11,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:11,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928343730] [2024-10-14 18:18:11,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928343730] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:11,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027691073] [2024-10-14 18:18:11,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 18:18:11,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:11,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:11,633 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) [2024-10-14 18:18:11,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 18:18:11,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 18:18:11,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 18:18:11,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-14 18:18:11,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:11,770 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 [2024-10-14 18:18:11,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:18:11,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:18:11,849 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:18:11,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:18:11,896 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 15 [2024-10-14 18:18:11,902 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 15 [2024-10-14 18:18:12,175 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 65 treesize of output 41 [2024-10-14 18:18:12,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-14 18:18:12,307 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:18:12,313 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-10-14 18:18:12,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 31 [2024-10-14 18:18:12,328 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 18:18:12,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 29 treesize of output 16 [2024-10-14 18:18:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:18:12,332 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:12,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027691073] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:12,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:18:12,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2024-10-14 18:18:12,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39503161] [2024-10-14 18:18:12,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:12,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 18:18:12,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:12,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 18:18:12,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2024-10-14 18:18:12,657 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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) [2024-10-14 18:18:13,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:13,361 INFO L93 Difference]: Finished difference Result 154 states and 186 transitions. [2024-10-14 18:18:13,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 18:18:13,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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) Word has length 36 [2024-10-14 18:18:13,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:13,362 INFO L225 Difference]: With dead ends: 154 [2024-10-14 18:18:13,362 INFO L226 Difference]: Without dead ends: 154 [2024-10-14 18:18:13,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-10-14 18:18:13,363 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 76 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:13,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 927 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 18:18:13,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-10-14 18:18:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2024-10-14 18:18:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 90 states have (on average 1.511111111111111) internal successors, (136), 110 states have internal predecessors, (136), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-14 18:18:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 150 transitions. [2024-10-14 18:18:13,368 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 150 transitions. Word has length 36 [2024-10-14 18:18:13,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:13,368 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 150 transitions. [2024-10-14 18:18:13,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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) [2024-10-14 18:18:13,368 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 150 transitions. [2024-10-14 18:18:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-14 18:18:13,369 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:13,369 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-14 18:18:13,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 18:18:13,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:13,574 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:13,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1481411329, now seen corresponding path program 1 times [2024-10-14 18:18:13,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:13,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25655842] [2024-10-14 18:18:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:13,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:13,702 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:13,706 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:18:13,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:13,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25655842] [2024-10-14 18:18:13,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25655842] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:13,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914070449] [2024-10-14 18:18:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:13,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:13,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:13,713 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) [2024-10-14 18:18:13,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 18:18:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:13,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 18:18:13,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:13,829 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 15 treesize of output 1 [2024-10-14 18:18:13,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-14 18:18:13,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-10-14 18:18:13,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-10-14 18:18:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:18:13,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:14,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914070449] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:14,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:18:14,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 13 [2024-10-14 18:18:14,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539017927] [2024-10-14 18:18:14,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:14,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 18:18:14,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:14,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 18:18:14,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2024-10-14 18:18:14,041 INFO L87 Difference]: Start difference. First operand 119 states and 150 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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) [2024-10-14 18:18:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:14,282 INFO L93 Difference]: Finished difference Result 157 states and 188 transitions. [2024-10-14 18:18:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 18:18:14,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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) Word has length 37 [2024-10-14 18:18:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:14,284 INFO L225 Difference]: With dead ends: 157 [2024-10-14 18:18:14,284 INFO L226 Difference]: Without dead ends: 157 [2024-10-14 18:18:14,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-10-14 18:18:14,285 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 113 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:14,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 619 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 18:18:14,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-10-14 18:18:14,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2024-10-14 18:18:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 89 states have (on average 1.4943820224719102) internal successors, (133), 109 states have internal predecessors, (133), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-14 18:18:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2024-10-14 18:18:14,290 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 37 [2024-10-14 18:18:14,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:14,290 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2024-10-14 18:18:14,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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) [2024-10-14 18:18:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2024-10-14 18:18:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-14 18:18:14,291 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:14,291 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:14,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-14 18:18:14,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:14,496 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:14,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:14,497 INFO L85 PathProgramCache]: Analyzing trace with hash -477506856, now seen corresponding path program 2 times [2024-10-14 18:18:14,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:14,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622806037] [2024-10-14 18:18:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:14,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:14,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:14,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 18:18:14,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:14,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622806037] [2024-10-14 18:18:14,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622806037] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:14,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147308271] [2024-10-14 18:18:14,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 18:18:14,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:14,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:14,786 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) [2024-10-14 18:18:14,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 18:18:14,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 18:18:14,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 18:18:14,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 18:18:14,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-14 18:18:14,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 18:18:15,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147308271] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:18:15,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:18:15,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 24 [2024-10-14 18:18:15,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925266671] [2024-10-14 18:18:15,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:15,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 18:18:15,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:15,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 18:18:15,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-10-14 18:18:15,168 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 24 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 18:18:15,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:15,555 INFO L93 Difference]: Finished difference Result 300 states and 404 transitions. [2024-10-14 18:18:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 18:18:15,556 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-10-14 18:18:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:15,559 INFO L225 Difference]: With dead ends: 300 [2024-10-14 18:18:15,559 INFO L226 Difference]: Without dead ends: 300 [2024-10-14 18:18:15,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-10-14 18:18:15,560 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 132 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:15,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1369 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 18:18:15,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-10-14 18:18:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 207. [2024-10-14 18:18:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 169 states have (on average 1.5029585798816567) internal successors, (254), 193 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (26), 10 states have call predecessors, (26), 13 states have call successors, (26) [2024-10-14 18:18:15,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 293 transitions. [2024-10-14 18:18:15,572 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 293 transitions. Word has length 39 [2024-10-14 18:18:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:15,572 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 293 transitions. [2024-10-14 18:18:15,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 18:18:15,573 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 293 transitions. [2024-10-14 18:18:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-14 18:18:15,574 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:15,574 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:15,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 18:18:15,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 18:18:15,778 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:15,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:15,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1427255036, now seen corresponding path program 1 times [2024-10-14 18:18:15,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:15,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125743447] [2024-10-14 18:18:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:15,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:15,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:15,852 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:15,883 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-14 18:18:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 18:18:15,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:15,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125743447] [2024-10-14 18:18:15,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125743447] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:15,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170596221] [2024-10-14 18:18:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:15,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:15,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:15,890 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:15,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 18:18:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:15,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 18:18:15,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 18:18:16,038 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 18:18:16,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170596221] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:16,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 18:18:16,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-10-14 18:18:16,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865591673] [2024-10-14 18:18:16,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:16,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 18:18:16,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:16,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 18:18:16,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:18:16,039 INFO L87 Difference]: Start difference. First operand 207 states and 293 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:18:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:16,098 INFO L93 Difference]: Finished difference Result 174 states and 220 transitions. [2024-10-14 18:18:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 18:18:16,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-10-14 18:18:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:16,100 INFO L225 Difference]: With dead ends: 174 [2024-10-14 18:18:16,100 INFO L226 Difference]: Without dead ends: 174 [2024-10-14 18:18:16,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:18:16,100 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:16,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 260 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:16,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-10-14 18:18:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2024-10-14 18:18:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 140 states have (on average 1.3785714285714286) internal successors, (193), 160 states have internal predecessors, (193), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2024-10-14 18:18:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 220 transitions. [2024-10-14 18:18:16,108 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 220 transitions. Word has length 40 [2024-10-14 18:18:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:16,108 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 220 transitions. [2024-10-14 18:18:16,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:18:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 220 transitions. [2024-10-14 18:18:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-14 18:18:16,110 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:16,110 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:16,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-14 18:18:16,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 18:18:16,311 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:16,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:16,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1919696650, now seen corresponding path program 1 times [2024-10-14 18:18:16,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:16,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060771205] [2024-10-14 18:18:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:16,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:16,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:16,382 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-14 18:18:16,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:16,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060771205] [2024-10-14 18:18:16,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060771205] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:16,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:16,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 18:18:16,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145788135] [2024-10-14 18:18:16,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:16,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 18:18:16,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:16,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 18:18:16,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 18:18:16,390 INFO L87 Difference]: Start difference. First operand 174 states and 220 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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) [2024-10-14 18:18:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:16,488 INFO L93 Difference]: Finished difference Result 196 states and 237 transitions. [2024-10-14 18:18:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 18:18:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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 40 [2024-10-14 18:18:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:16,489 INFO L225 Difference]: With dead ends: 196 [2024-10-14 18:18:16,489 INFO L226 Difference]: Without dead ends: 196 [2024-10-14 18:18:16,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 18:18:16,490 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 33 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:16,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 152 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:16,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-10-14 18:18:16,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 180. [2024-10-14 18:18:16,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 147 states have (on average 1.3945578231292517) internal successors, (205), 166 states have internal predecessors, (205), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2024-10-14 18:18:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 232 transitions. [2024-10-14 18:18:16,501 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 232 transitions. Word has length 40 [2024-10-14 18:18:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:16,501 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 232 transitions. [2024-10-14 18:18:16,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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) [2024-10-14 18:18:16,502 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 232 transitions. [2024-10-14 18:18:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-14 18:18:16,503 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:16,503 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:16,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-14 18:18:16,503 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:16,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:16,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1919696649, now seen corresponding path program 1 times [2024-10-14 18:18:16,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:16,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066873211] [2024-10-14 18:18:16,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:16,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:16,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:16,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 18:18:16,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:16,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066873211] [2024-10-14 18:18:16,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066873211] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:16,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:16,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 18:18:16,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006933818] [2024-10-14 18:18:16,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:16,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 18:18:16,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:16,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 18:18:16,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 18:18:16,697 INFO L87 Difference]: Start difference. First operand 180 states and 232 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 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) [2024-10-14 18:18:16,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:16,836 INFO L93 Difference]: Finished difference Result 197 states and 237 transitions. [2024-10-14 18:18:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 18:18:16,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 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 40 [2024-10-14 18:18:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:16,838 INFO L225 Difference]: With dead ends: 197 [2024-10-14 18:18:16,840 INFO L226 Difference]: Without dead ends: 197 [2024-10-14 18:18:16,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 18:18:16,841 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:16,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 198 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-10-14 18:18:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2024-10-14 18:18:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 148 states have (on average 1.385135135135135) internal successors, (205), 167 states have internal predecessors, (205), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2024-10-14 18:18:16,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 232 transitions. [2024-10-14 18:18:16,850 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 232 transitions. Word has length 40 [2024-10-14 18:18:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:16,851 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 232 transitions. [2024-10-14 18:18:16,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 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) [2024-10-14 18:18:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 232 transitions. [2024-10-14 18:18:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-14 18:18:16,854 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:16,854 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:16,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-14 18:18:16,854 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:16,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:16,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1150799977, now seen corresponding path program 3 times [2024-10-14 18:18:16,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:16,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793242204] [2024-10-14 18:18:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:16,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:16,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:17,024 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-14 18:18:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 18:18:17,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:17,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793242204] [2024-10-14 18:18:17,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793242204] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:17,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100135291] [2024-10-14 18:18:17,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 18:18:17,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:17,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:17,031 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:17,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 18:18:17,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-14 18:18:17,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 18:18:17,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 18:18:17,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:18:17,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 18:18:17,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100135291] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:18:17,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:18:17,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2024-10-14 18:18:17,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140193761] [2024-10-14 18:18:17,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:17,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 18:18:17,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:17,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 18:18:17,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-10-14 18:18:17,325 INFO L87 Difference]: Start difference. First operand 181 states and 232 transitions. Second operand has 16 states, 13 states have (on average 3.923076923076923) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 18:18:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:17,511 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2024-10-14 18:18:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 18:18:17,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.923076923076923) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2024-10-14 18:18:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:17,512 INFO L225 Difference]: With dead ends: 176 [2024-10-14 18:18:17,512 INFO L226 Difference]: Without dead ends: 176 [2024-10-14 18:18:17,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-10-14 18:18:17,513 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 16 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:17,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 545 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-10-14 18:18:17,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 167. [2024-10-14 18:18:17,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 135 states have (on average 1.4) internal successors, (189), 154 states have internal predecessors, (189), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2024-10-14 18:18:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2024-10-14 18:18:17,519 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 40 [2024-10-14 18:18:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:17,519 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2024-10-14 18:18:17,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.923076923076923) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 18:18:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2024-10-14 18:18:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-14 18:18:17,520 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:17,520 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:17,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 18:18:17,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:17,725 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:17,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:17,726 INFO L85 PathProgramCache]: Analyzing trace with hash 618944631, now seen corresponding path program 1 times [2024-10-14 18:18:17,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:17,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769004382] [2024-10-14 18:18:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:17,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:17,817 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:17,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 18:18:17,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:17,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769004382] [2024-10-14 18:18:17,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769004382] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:17,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817512021] [2024-10-14 18:18:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:17,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:17,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:17,828 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:17,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 18:18:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:17,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 18:18:17,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:18,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-10-14 18:18:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:18:18,019 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 18:18:18,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817512021] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:18,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 18:18:18,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-10-14 18:18:18,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119619119] [2024-10-14 18:18:18,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:18,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 18:18:18,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:18,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 18:18:18,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-10-14 18:18:18,021 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:18:22,036 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] [2024-10-14 18:18:26,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 18:18:30,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 18:18:34,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 18:18:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:34,206 INFO L93 Difference]: Finished difference Result 208 states and 245 transitions. [2024-10-14 18:18:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 18:18:34,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (2), 2 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 41 [2024-10-14 18:18:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:34,211 INFO L225 Difference]: With dead ends: 208 [2024-10-14 18:18:34,211 INFO L226 Difference]: Without dead ends: 208 [2024-10-14 18:18:34,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-10-14 18:18:34,212 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 86 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:34,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 294 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 4 Unknown, 0 Unchecked, 16.1s Time] [2024-10-14 18:18:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-10-14 18:18:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 173. [2024-10-14 18:18:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 140 states have (on average 1.3928571428571428) internal successors, (195), 159 states have internal predecessors, (195), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2024-10-14 18:18:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 218 transitions. [2024-10-14 18:18:34,218 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 218 transitions. Word has length 41 [2024-10-14 18:18:34,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:34,218 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 218 transitions. [2024-10-14 18:18:34,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:18:34,218 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 218 transitions. [2024-10-14 18:18:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-14 18:18:34,219 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:34,219 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:34,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 18:18:34,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:34,423 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:34,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:34,423 INFO L85 PathProgramCache]: Analyzing trace with hash 2007509993, now seen corresponding path program 1 times [2024-10-14 18:18:34,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:34,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218163147] [2024-10-14 18:18:34,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:34,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:34,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:34,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 18:18:34,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:34,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218163147] [2024-10-14 18:18:34,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218163147] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:34,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:34,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 18:18:34,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749402551] [2024-10-14 18:18:34,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:34,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 18:18:34,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 18:18:34,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 18:18:34,543 INFO L87 Difference]: Start difference. First operand 173 states and 218 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2024-10-14 18:18:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:34,645 INFO L93 Difference]: Finished difference Result 190 states and 224 transitions. [2024-10-14 18:18:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 18:18:34,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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 42 [2024-10-14 18:18:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:34,646 INFO L225 Difference]: With dead ends: 190 [2024-10-14 18:18:34,646 INFO L226 Difference]: Without dead ends: 190 [2024-10-14 18:18:34,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 18:18:34,647 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 32 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:34,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 240 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-10-14 18:18:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 174. [2024-10-14 18:18:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 141 states have (on average 1.3900709219858156) internal successors, (196), 160 states have internal predecessors, (196), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2024-10-14 18:18:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 219 transitions. [2024-10-14 18:18:34,653 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 219 transitions. Word has length 42 [2024-10-14 18:18:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:34,653 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 219 transitions. [2024-10-14 18:18:34,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2024-10-14 18:18:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 219 transitions. [2024-10-14 18:18:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-14 18:18:34,654 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:34,654 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-14 18:18:34,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-14 18:18:34,654 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:34,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash -13206098, now seen corresponding path program 1 times [2024-10-14 18:18:34,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:34,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63744047] [2024-10-14 18:18:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:34,752 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:34,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 18:18:34,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:34,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63744047] [2024-10-14 18:18:34,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63744047] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:34,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338731169] [2024-10-14 18:18:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:34,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:34,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:34,879 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:34,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 18:18:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:35,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 18:18:35,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 18:18:35,196 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 18:18:35,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338731169] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:18:35,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:18:35,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-10-14 18:18:35,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907543581] [2024-10-14 18:18:35,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:35,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 18:18:35,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:35,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 18:18:35,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2024-10-14 18:18:35,474 INFO L87 Difference]: Start difference. First operand 174 states and 219 transitions. Second operand has 24 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 18:18:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:35,930 INFO L93 Difference]: Finished difference Result 273 states and 367 transitions. [2024-10-14 18:18:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 18:18:35,930 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2024-10-14 18:18:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:35,932 INFO L225 Difference]: With dead ends: 273 [2024-10-14 18:18:35,932 INFO L226 Difference]: Without dead ends: 273 [2024-10-14 18:18:35,932 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 18:18:35,933 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 143 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:35,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 788 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 18:18:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-10-14 18:18:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 189. [2024-10-14 18:18:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 154 states have (on average 1.4025974025974026) internal successors, (216), 174 states have internal predecessors, (216), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2024-10-14 18:18:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 241 transitions. [2024-10-14 18:18:35,938 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 241 transitions. Word has length 42 [2024-10-14 18:18:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:35,938 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 241 transitions. [2024-10-14 18:18:35,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 18:18:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 241 transitions. [2024-10-14 18:18:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-14 18:18:35,939 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:35,939 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:35,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-14 18:18:36,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-14 18:18:36,141 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:36,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1034274452, now seen corresponding path program 1 times [2024-10-14 18:18:36,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:36,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465604552] [2024-10-14 18:18:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:36,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:36,200 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:36,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 18:18:36,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465604552] [2024-10-14 18:18:36,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465604552] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894455209] [2024-10-14 18:18:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:36,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:36,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:36,305 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:36,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 18:18:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:36,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 18:18:36,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 18:18:36,477 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 18:18:36,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894455209] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:36,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 18:18:36,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2024-10-14 18:18:36,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284903782] [2024-10-14 18:18:36,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:36,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 18:18:36,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:36,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 18:18:36,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-10-14 18:18:36,479 INFO L87 Difference]: Start difference. First operand 189 states and 241 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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) [2024-10-14 18:18:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:36,558 INFO L93 Difference]: Finished difference Result 220 states and 275 transitions. [2024-10-14 18:18:36,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 18:18:36,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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 [2024-10-14 18:18:36,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:36,560 INFO L225 Difference]: With dead ends: 220 [2024-10-14 18:18:36,560 INFO L226 Difference]: Without dead ends: 220 [2024-10-14 18:18:36,561 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-10-14 18:18:36,561 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 27 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:36,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 280 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-10-14 18:18:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 189. [2024-10-14 18:18:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 154 states have (on average 1.3896103896103895) internal successors, (214), 174 states have internal predecessors, (214), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2024-10-14 18:18:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 239 transitions. [2024-10-14 18:18:36,601 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 239 transitions. Word has length 42 [2024-10-14 18:18:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:36,602 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 239 transitions. [2024-10-14 18:18:36,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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) [2024-10-14 18:18:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 239 transitions. [2024-10-14 18:18:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-14 18:18:36,603 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:36,603 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:36,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-14 18:18:36,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-14 18:18:36,804 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:36,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1507181328, now seen corresponding path program 1 times [2024-10-14 18:18:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:36,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359914611] [2024-10-14 18:18:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:36,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:36,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:36,945 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:36,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-14 18:18:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-14 18:18:36,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:36,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359914611] [2024-10-14 18:18:36,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359914611] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:36,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177097014] [2024-10-14 18:18:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:36,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:36,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:36,955 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:36,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 18:18:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:37,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 18:18:37,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:37,077 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 [2024-10-14 18:18:37,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:18:37,090 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 [2024-10-14 18:18:37,106 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-14 18:18:37,107 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 [2024-10-14 18:18:37,185 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-14 18:18:37,185 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 [2024-10-14 18:18:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 18:18:37,196 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-14 18:18:37,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177097014] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:18:37,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:18:37,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-10-14 18:18:37,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38284852] [2024-10-14 18:18:37,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:37,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 18:18:37,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:37,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 18:18:37,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-10-14 18:18:37,281 INFO L87 Difference]: Start difference. First operand 189 states and 239 transitions. Second operand has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 18:18:37,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:37,373 INFO L93 Difference]: Finished difference Result 198 states and 248 transitions. [2024-10-14 18:18:37,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 18:18:37,374 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-10-14 18:18:37,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:37,375 INFO L225 Difference]: With dead ends: 198 [2024-10-14 18:18:37,375 INFO L226 Difference]: Without dead ends: 198 [2024-10-14 18:18:37,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:18:37,376 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 138 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:37,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 120 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-10-14 18:18:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2024-10-14 18:18:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 154 states have (on average 1.37012987012987) internal successors, (211), 172 states have internal predecessors, (211), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2024-10-14 18:18:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 236 transitions. [2024-10-14 18:18:37,382 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 236 transitions. Word has length 43 [2024-10-14 18:18:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:37,382 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 236 transitions. [2024-10-14 18:18:37,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 18:18:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 236 transitions. [2024-10-14 18:18:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-14 18:18:37,384 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:37,384 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:37,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-14 18:18:37,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:37,589 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:37,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:37,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1507181327, now seen corresponding path program 1 times [2024-10-14 18:18:37,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:37,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394425271] [2024-10-14 18:18:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:37,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:37,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:37,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:37,816 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-14 18:18:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-14 18:18:37,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:37,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394425271] [2024-10-14 18:18:37,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394425271] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:37,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467361435] [2024-10-14 18:18:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:37,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:37,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:37,825 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:37,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 18:18:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:37,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-14 18:18:37,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:37,959 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 [2024-10-14 18:18:37,966 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 [2024-10-14 18:18:37,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:18:37,997 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 [2024-10-14 18:18:38,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:18:38,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 19 treesize of output 12 [2024-10-14 18:18:38,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:18:38,038 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 [2024-10-14 18:18:38,046 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:18:38,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:18:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:18:38,276 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 [2024-10-14 18:18:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-14 18:18:38,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:38,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467361435] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:38,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:18:38,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2024-10-14 18:18:38,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518794583] [2024-10-14 18:18:38,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:38,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 18:18:38,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:38,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 18:18:38,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-14 18:18:38,382 INFO L87 Difference]: Start difference. First operand 187 states and 236 transitions. Second operand has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-14 18:18:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:38,538 INFO L93 Difference]: Finished difference Result 191 states and 240 transitions. [2024-10-14 18:18:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 18:18:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2024-10-14 18:18:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:38,540 INFO L225 Difference]: With dead ends: 191 [2024-10-14 18:18:38,540 INFO L226 Difference]: Without dead ends: 191 [2024-10-14 18:18:38,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2024-10-14 18:18:38,541 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 170 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:38,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 250 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-10-14 18:18:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 182. [2024-10-14 18:18:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 151 states have (on average 1.3443708609271523) internal successors, (203), 167 states have internal predecessors, (203), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2024-10-14 18:18:38,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 227 transitions. [2024-10-14 18:18:38,546 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 227 transitions. Word has length 43 [2024-10-14 18:18:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:38,546 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 227 transitions. [2024-10-14 18:18:38,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.545454545454546) internal successors, (50), 12 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-14 18:18:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 227 transitions. [2024-10-14 18:18:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-14 18:18:38,547 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:38,547 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-14 18:18:38,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 18:18:38,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:38,748 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:38,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash -144674, now seen corresponding path program 2 times [2024-10-14 18:18:38,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:38,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351749387] [2024-10-14 18:18:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:38,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:38,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:38,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-14 18:18:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 18:18:38,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:38,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351749387] [2024-10-14 18:18:38,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351749387] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:38,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310691773] [2024-10-14 18:18:38,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 18:18:38,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:38,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:38,910 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:38,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 18:18:39,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 18:18:39,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 18:18:39,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 18:18:39,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 18:18:39,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 18:18:39,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310691773] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:18:39,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:18:39,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-10-14 18:18:39,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728069248] [2024-10-14 18:18:39,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:39,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 18:18:39,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 18:18:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-10-14 18:18:39,231 INFO L87 Difference]: Start difference. First operand 182 states and 227 transitions. Second operand has 16 states, 13 states have (on average 4.384615384615385) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 18:18:39,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:39,436 INFO L93 Difference]: Finished difference Result 182 states and 227 transitions. [2024-10-14 18:18:39,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 18:18:39,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.384615384615385) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-10-14 18:18:39,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:39,438 INFO L225 Difference]: With dead ends: 182 [2024-10-14 18:18:39,438 INFO L226 Difference]: Without dead ends: 182 [2024-10-14 18:18:39,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-10-14 18:18:39,439 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 28 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:39,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 526 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:39,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-10-14 18:18:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 172. [2024-10-14 18:18:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 142 states have (on average 1.3591549295774648) internal successors, (193), 158 states have internal predecessors, (193), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2024-10-14 18:18:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 213 transitions. [2024-10-14 18:18:39,443 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 213 transitions. Word has length 42 [2024-10-14 18:18:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:39,444 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 213 transitions. [2024-10-14 18:18:39,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.384615384615385) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-14 18:18:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 213 transitions. [2024-10-14 18:18:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-14 18:18:39,444 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:39,445 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:39,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-14 18:18:39,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-14 18:18:39,649 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:39,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:39,649 INFO L85 PathProgramCache]: Analyzing trace with hash 762525777, now seen corresponding path program 1 times [2024-10-14 18:18:39,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:39,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549375621] [2024-10-14 18:18:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:39,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:39,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:39,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-14 18:18:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 18:18:39,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:39,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549375621] [2024-10-14 18:18:39,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549375621] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:39,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774713619] [2024-10-14 18:18:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:39,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:39,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:39,970 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:39,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 18:18:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:40,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-14 18:18:40,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:40,110 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 [2024-10-14 18:18:40,124 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-14 18:18:40,124 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 [2024-10-14 18:18:40,152 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 [2024-10-14 18:18:40,207 INFO L349 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2024-10-14 18:18:40,207 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 28 treesize of output 36 [2024-10-14 18:18:40,263 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 [2024-10-14 18:18:40,268 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 41 treesize of output 21 [2024-10-14 18:18:40,520 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 69 treesize of output 45 [2024-10-14 18:18:40,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-14 18:18:40,635 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:18:40,636 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 46 treesize of output 25 [2024-10-14 18:18:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 18:18:40,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:40,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774713619] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:40,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:18:40,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2024-10-14 18:18:40,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546727334] [2024-10-14 18:18:40,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:40,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 18:18:40,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:40,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 18:18:40,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2024-10-14 18:18:40,900 INFO L87 Difference]: Start difference. First operand 172 states and 213 transitions. Second operand has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 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) [2024-10-14 18:18:41,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:41,605 INFO L93 Difference]: Finished difference Result 205 states and 250 transitions. [2024-10-14 18:18:41,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 18:18:41,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 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) Word has length 43 [2024-10-14 18:18:41,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:41,606 INFO L225 Difference]: With dead ends: 205 [2024-10-14 18:18:41,607 INFO L226 Difference]: Without dead ends: 205 [2024-10-14 18:18:41,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2024-10-14 18:18:41,607 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 74 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:41,608 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 853 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 18:18:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-10-14 18:18:41,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 176. [2024-10-14 18:18:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 146 states have (on average 1.3630136986301369) internal successors, (199), 162 states have internal predecessors, (199), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2024-10-14 18:18:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 219 transitions. [2024-10-14 18:18:41,612 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 219 transitions. Word has length 43 [2024-10-14 18:18:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:41,613 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 219 transitions. [2024-10-14 18:18:41,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 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) [2024-10-14 18:18:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 219 transitions. [2024-10-14 18:18:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-14 18:18:41,613 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:41,614 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:41,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-14 18:18:41,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-14 18:18:41,815 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:41,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:41,815 INFO L85 PathProgramCache]: Analyzing trace with hash 762525778, now seen corresponding path program 1 times [2024-10-14 18:18:41,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:41,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309466070] [2024-10-14 18:18:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:41,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:42,255 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:42,259 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-14 18:18:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 18:18:42,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:42,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309466070] [2024-10-14 18:18:42,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309466070] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:42,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502657244] [2024-10-14 18:18:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:42,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:42,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:42,267 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:42,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 18:18:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:42,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-14 18:18:42,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:42,416 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 [2024-10-14 18:18:42,421 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 [2024-10-14 18:18:42,502 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-14 18:18:42,503 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 [2024-10-14 18:18:42,525 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-14 18:18:42,525 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 [2024-10-14 18:18:42,585 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 15 treesize of output 1 [2024-10-14 18:18:42,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:18:42,657 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-10-14 18:18:42,657 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 18 treesize of output 21 [2024-10-14 18:18:42,700 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-10-14 18:18:42,700 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 20 treesize of output 22 [2024-10-14 18:18:42,802 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 15 [2024-10-14 18:18:42,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 29 [2024-10-14 18:18:43,168 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 95 treesize of output 63 [2024-10-14 18:18:43,332 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:18:43,345 INFO L349 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2024-10-14 18:18:43,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 41 [2024-10-14 18:18:43,357 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 18:18:43,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2024-10-14 18:18:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 18:18:43,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:43,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502657244] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:43,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:18:43,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2024-10-14 18:18:43,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89503853] [2024-10-14 18:18:43,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:43,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 18:18:43,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:43,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 18:18:43,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2024-10-14 18:18:43,723 INFO L87 Difference]: Start difference. First operand 176 states and 219 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 23 states have internal predecessors, (60), 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) [2024-10-14 18:18:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:44,898 INFO L93 Difference]: Finished difference Result 216 states and 260 transitions. [2024-10-14 18:18:44,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 18:18:44,899 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 23 states have internal predecessors, (60), 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) Word has length 43 [2024-10-14 18:18:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:44,900 INFO L225 Difference]: With dead ends: 216 [2024-10-14 18:18:44,900 INFO L226 Difference]: Without dead ends: 216 [2024-10-14 18:18:44,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2024-10-14 18:18:44,901 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 84 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:44,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 1296 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-14 18:18:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-10-14 18:18:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2024-10-14 18:18:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 145 states have (on average 1.3586206896551725) internal successors, (197), 161 states have internal predecessors, (197), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2024-10-14 18:18:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 217 transitions. [2024-10-14 18:18:44,905 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 217 transitions. Word has length 43 [2024-10-14 18:18:44,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:44,905 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 217 transitions. [2024-10-14 18:18:44,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 23 states have internal predecessors, (60), 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) [2024-10-14 18:18:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 217 transitions. [2024-10-14 18:18:44,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-14 18:18:44,906 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:44,906 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:44,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-14 18:18:45,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-14 18:18:45,111 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:45,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:45,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1689197054, now seen corresponding path program 1 times [2024-10-14 18:18:45,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:45,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980527495] [2024-10-14 18:18:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:45,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:45,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:45,333 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:18:45,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:45,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980527495] [2024-10-14 18:18:45,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980527495] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:45,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261481443] [2024-10-14 18:18:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:45,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:45,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:45,338 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:45,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-14 18:18:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:45,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-14 18:18:45,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:45,478 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 [2024-10-14 18:18:45,499 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:18:45,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:18:45,522 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 15 treesize of output 1 [2024-10-14 18:18:45,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-14 18:18:45,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-10-14 18:18:45,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:18:45,760 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 25 treesize of output 21 [2024-10-14 18:18:45,814 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 [2024-10-14 18:18:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:18:45,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:45,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:18:45,893 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 37 treesize of output 41 [2024-10-14 18:18:45,980 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 49 treesize of output 29 [2024-10-14 18:18:45,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2024-10-14 18:18:46,016 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 10 treesize of output 8 [2024-10-14 18:18:46,019 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 14 treesize of output 12 [2024-10-14 18:18:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:18:46,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261481443] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:18:46,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:18:46,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13] total 27 [2024-10-14 18:18:46,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088317609] [2024-10-14 18:18:46,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:46,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-14 18:18:46,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:46,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-14 18:18:46,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2024-10-14 18:18:46,073 INFO L87 Difference]: Start difference. First operand 175 states and 217 transitions. Second operand has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 28 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 18:18:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:46,787 INFO L93 Difference]: Finished difference Result 217 states and 263 transitions. [2024-10-14 18:18:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 18:18:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 28 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2024-10-14 18:18:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:46,789 INFO L225 Difference]: With dead ends: 217 [2024-10-14 18:18:46,789 INFO L226 Difference]: Without dead ends: 217 [2024-10-14 18:18:46,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2024-10-14 18:18:46,790 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 112 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:46,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 866 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 18:18:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-10-14 18:18:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 188. [2024-10-14 18:18:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 158 states have (on average 1.3670886075949367) internal successors, (216), 174 states have internal predecessors, (216), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2024-10-14 18:18:46,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 236 transitions. [2024-10-14 18:18:46,795 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 236 transitions. Word has length 45 [2024-10-14 18:18:46,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:46,795 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 236 transitions. [2024-10-14 18:18:46,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 28 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 18:18:46,795 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 236 transitions. [2024-10-14 18:18:46,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-14 18:18:46,796 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:46,796 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:46,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-14 18:18:46,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-14 18:18:46,997 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:46,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:46,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1689197053, now seen corresponding path program 1 times [2024-10-14 18:18:46,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:46,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586443689] [2024-10-14 18:18:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:46,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:47,255 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:47,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:18:47,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:47,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586443689] [2024-10-14 18:18:47,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586443689] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:47,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681061278] [2024-10-14 18:18:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:47,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:47,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:47,266 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:47,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-14 18:18:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:47,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-14 18:18:47,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:47,411 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 [2024-10-14 18:18:47,413 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 [2024-10-14 18:18:47,466 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:18:47,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:18:47,476 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 [2024-10-14 18:18:47,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:18:47,519 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 15 treesize of output 1 [2024-10-14 18:18:47,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-14 18:18:47,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2024-10-14 18:18:47,872 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:18:47,873 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 25 treesize of output 21 [2024-10-14 18:18:47,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:18:47,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-10-14 18:18:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:18:47,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:48,147 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 28 [2024-10-14 18:18:48,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-10-14 18:18:48,194 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 19 [2024-10-14 18:18:48,196 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 17 [2024-10-14 18:18:48,198 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 36 treesize of output 34 [2024-10-14 18:18:48,200 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:18:48,202 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 7 [2024-10-14 18:18:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 18:18:48,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681061278] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:18:48,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:18:48,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 30 [2024-10-14 18:18:48,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464505992] [2024-10-14 18:18:48,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:48,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-14 18:18:48,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:48,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-14 18:18:48,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2024-10-14 18:18:48,416 INFO L87 Difference]: Start difference. First operand 188 states and 236 transitions. Second operand has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 18:18:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:49,447 INFO L93 Difference]: Finished difference Result 218 states and 263 transitions. [2024-10-14 18:18:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 18:18:49,448 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2024-10-14 18:18:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:49,449 INFO L225 Difference]: With dead ends: 218 [2024-10-14 18:18:49,449 INFO L226 Difference]: Without dead ends: 218 [2024-10-14 18:18:49,450 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2024-10-14 18:18:49,450 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 64 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:49,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1008 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-14 18:18:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-10-14 18:18:49,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 189. [2024-10-14 18:18:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 159 states have (on average 1.3584905660377358) internal successors, (216), 175 states have internal predecessors, (216), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2024-10-14 18:18:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 236 transitions. [2024-10-14 18:18:49,455 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 236 transitions. Word has length 45 [2024-10-14 18:18:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:49,455 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 236 transitions. [2024-10-14 18:18:49,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.033333333333333) internal successors, (91), 31 states have internal predecessors, (91), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 18:18:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 236 transitions. [2024-10-14 18:18:49,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-14 18:18:49,456 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:49,456 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:49,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-14 18:18:49,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:49,661 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:49,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:49,661 INFO L85 PathProgramCache]: Analyzing trace with hash -847018698, now seen corresponding path program 1 times [2024-10-14 18:18:49,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:49,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458945035] [2024-10-14 18:18:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:49,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:49,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:49,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:49,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-14 18:18:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-14 18:18:49,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:49,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458945035] [2024-10-14 18:18:49,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458945035] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:49,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:49,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 18:18:49,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017324233] [2024-10-14 18:18:49,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:49,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 18:18:49,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:49,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 18:18:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 18:18:49,720 INFO L87 Difference]: Start difference. First operand 189 states and 236 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 18:18:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:49,755 INFO L93 Difference]: Finished difference Result 188 states and 234 transitions. [2024-10-14 18:18:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 18:18:49,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2024-10-14 18:18:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:49,757 INFO L225 Difference]: With dead ends: 188 [2024-10-14 18:18:49,757 INFO L226 Difference]: Without dead ends: 188 [2024-10-14 18:18:49,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 18:18:49,757 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 9 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:49,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 79 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 18:18:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-10-14 18:18:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2024-10-14 18:18:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 159 states have (on average 1.3459119496855345) internal successors, (214), 174 states have internal predecessors, (214), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2024-10-14 18:18:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 234 transitions. [2024-10-14 18:18:49,762 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 234 transitions. Word has length 46 [2024-10-14 18:18:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:49,763 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 234 transitions. [2024-10-14 18:18:49,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 18:18:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 234 transitions. [2024-10-14 18:18:49,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-14 18:18:49,763 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:49,764 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:49,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-10-14 18:18:49,764 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:49,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash -847018697, now seen corresponding path program 1 times [2024-10-14 18:18:49,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:49,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243159746] [2024-10-14 18:18:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:49,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:49,815 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:49,819 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:49,821 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-14 18:18:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-14 18:18:49,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:49,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243159746] [2024-10-14 18:18:49,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243159746] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:49,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:49,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 18:18:49,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832690053] [2024-10-14 18:18:49,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:49,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 18:18:49,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 18:18:49,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 18:18:49,825 INFO L87 Difference]: Start difference. First operand 188 states and 234 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 18:18:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:49,856 INFO L93 Difference]: Finished difference Result 187 states and 232 transitions. [2024-10-14 18:18:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 18:18:49,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2024-10-14 18:18:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:49,857 INFO L225 Difference]: With dead ends: 187 [2024-10-14 18:18:49,857 INFO L226 Difference]: Without dead ends: 187 [2024-10-14 18:18:49,858 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 18:18:49,858 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 9 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:49,858 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 82 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 18:18:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-10-14 18:18:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2024-10-14 18:18:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 159 states have (on average 1.3333333333333333) internal successors, (212), 173 states have internal predecessors, (212), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2024-10-14 18:18:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 232 transitions. [2024-10-14 18:18:49,866 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 232 transitions. Word has length 46 [2024-10-14 18:18:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:49,866 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 232 transitions. [2024-10-14 18:18:49,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 18:18:49,867 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 232 transitions. [2024-10-14 18:18:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-14 18:18:49,867 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:49,867 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:49,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-10-14 18:18:49,868 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:49,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:49,868 INFO L85 PathProgramCache]: Analyzing trace with hash -847018642, now seen corresponding path program 1 times [2024-10-14 18:18:49,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:49,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512714687] [2024-10-14 18:18:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:49,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:49,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:49,929 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:49,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-14 18:18:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-14 18:18:49,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:49,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512714687] [2024-10-14 18:18:49,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512714687] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:18:49,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:18:49,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 18:18:49,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618362637] [2024-10-14 18:18:49,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:18:49,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 18:18:49,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:49,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 18:18:49,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-14 18:18:49,969 INFO L87 Difference]: Start difference. First operand 187 states and 232 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 18:18:50,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:50,055 INFO L93 Difference]: Finished difference Result 209 states and 258 transitions. [2024-10-14 18:18:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 18:18:50,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2024-10-14 18:18:50,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:50,056 INFO L225 Difference]: With dead ends: 209 [2024-10-14 18:18:50,056 INFO L226 Difference]: Without dead ends: 209 [2024-10-14 18:18:50,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:18:50,057 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 13 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:50,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 262 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:18:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-10-14 18:18:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2024-10-14 18:18:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 179 states have (on average 1.318435754189944) internal successors, (236), 193 states have internal predecessors, (236), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) [2024-10-14 18:18:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 258 transitions. [2024-10-14 18:18:50,062 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 258 transitions. Word has length 46 [2024-10-14 18:18:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:50,063 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 258 transitions. [2024-10-14 18:18:50,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-14 18:18:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 258 transitions. [2024-10-14 18:18:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-14 18:18:50,063 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:50,064 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:50,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-10-14 18:18:50,065 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:50,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:50,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1652063462, now seen corresponding path program 2 times [2024-10-14 18:18:50,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:50,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155185829] [2024-10-14 18:18:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:50,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:50,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:50,737 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-14 18:18:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 18:18:50,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:50,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155185829] [2024-10-14 18:18:50,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155185829] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:50,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441967988] [2024-10-14 18:18:50,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 18:18:50,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:50,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:50,752 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:50,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-14 18:18:50,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 18:18:50,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 18:18:50,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-14 18:18:50,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:50,919 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 [2024-10-14 18:18:50,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:18:50,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:18:50,986 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-14 18:18:50,986 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 [2024-10-14 18:18:51,054 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 15 [2024-10-14 18:18:51,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-10-14 18:18:51,124 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-10-14 18:18:51,124 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 20 treesize of output 22 [2024-10-14 18:18:51,207 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-10-14 18:18:51,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 44 [2024-10-14 18:18:51,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2024-10-14 18:18:51,606 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 116 treesize of output 80 [2024-10-14 18:18:51,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-14 18:18:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 18:18:51,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:56,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441967988] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:56,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:18:56,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-10-14 18:18:56,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25474736] [2024-10-14 18:18:56,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:56,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 18:18:56,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 18:18:56,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=798, Unknown=1, NotChecked=0, Total=870 [2024-10-14 18:18:56,539 INFO L87 Difference]: Start difference. First operand 209 states and 258 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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) [2024-10-14 18:18:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:18:57,642 INFO L93 Difference]: Finished difference Result 283 states and 342 transitions. [2024-10-14 18:18:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 18:18:57,642 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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) Word has length 45 [2024-10-14 18:18:57,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:18:57,644 INFO L225 Difference]: With dead ends: 283 [2024-10-14 18:18:57,647 INFO L226 Difference]: Without dead ends: 283 [2024-10-14 18:18:57,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=126, Invalid=1205, Unknown=1, NotChecked=0, Total=1332 [2024-10-14 18:18:57,648 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 73 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-14 18:18:57,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1429 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-14 18:18:57,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-10-14 18:18:57,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 239. [2024-10-14 18:18:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 205 states have (on average 1.3073170731707318) internal successors, (268), 220 states have internal predecessors, (268), 9 states have call successors, (9), 6 states have call predecessors, (9), 13 states have return successors, (19), 12 states have call predecessors, (19), 9 states have call successors, (19) [2024-10-14 18:18:57,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 296 transitions. [2024-10-14 18:18:57,659 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 296 transitions. Word has length 45 [2024-10-14 18:18:57,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:18:57,660 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 296 transitions. [2024-10-14 18:18:57,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 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) [2024-10-14 18:18:57,660 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 296 transitions. [2024-10-14 18:18:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-14 18:18:57,665 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:18:57,665 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:18:57,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-14 18:18:57,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-10-14 18:18:57,865 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:18:57,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:18:57,866 INFO L85 PathProgramCache]: Analyzing trace with hash -825502485, now seen corresponding path program 1 times [2024-10-14 18:18:57,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:18:57,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228446296] [2024-10-14 18:18:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:57,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:18:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:58,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:18:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:58,085 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 18:18:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 18:18:58,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:18:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228446296] [2024-10-14 18:18:58,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228446296] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:18:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106539929] [2024-10-14 18:18:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:18:58,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:18:58,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:18:58,091 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:18:58,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-14 18:18:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:18:58,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 18:18:58,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:18:58,271 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 15 treesize of output 1 [2024-10-14 18:18:58,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-10-14 18:18:58,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:18:58,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2024-10-14 18:18:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 18:18:58,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:18:58,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 18:18:58,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2024-10-14 18:18:58,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-10-14 18:18:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 18:18:58,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106539929] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:18:58,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:18:58,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 16 [2024-10-14 18:18:58,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287028117] [2024-10-14 18:18:58,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:18:58,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 18:18:58,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:18:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 18:18:58,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-10-14 18:18:58,463 INFO L87 Difference]: Start difference. First operand 239 states and 296 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 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) [2024-10-14 18:19:02,497 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] [2024-10-14 18:19:06,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 18:19:10,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 18:19:14,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 18:19:18,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 18:19:22,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 18:19:26,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 18:19:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:19:26,883 INFO L93 Difference]: Finished difference Result 274 states and 329 transitions. [2024-10-14 18:19:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 18:19:26,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 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 46 [2024-10-14 18:19:26,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:19:26,884 INFO L225 Difference]: With dead ends: 274 [2024-10-14 18:19:26,885 INFO L226 Difference]: Without dead ends: 274 [2024-10-14 18:19:26,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-10-14 18:19:26,885 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 71 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 3 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.3s IncrementalHoareTripleChecker+Time [2024-10-14 18:19:26,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 734 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 446 Invalid, 7 Unknown, 0 Unchecked, 28.3s Time] [2024-10-14 18:19:26,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-10-14 18:19:26,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 239. [2024-10-14 18:19:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 205 states have (on average 1.302439024390244) internal successors, (267), 220 states have internal predecessors, (267), 9 states have call successors, (9), 6 states have call predecessors, (9), 13 states have return successors, (19), 12 states have call predecessors, (19), 9 states have call successors, (19) [2024-10-14 18:19:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 295 transitions. [2024-10-14 18:19:26,891 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 295 transitions. Word has length 46 [2024-10-14 18:19:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:19:26,892 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 295 transitions. [2024-10-14 18:19:26,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 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) [2024-10-14 18:19:26,892 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 295 transitions. [2024-10-14 18:19:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-14 18:19:26,893 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:19:26,893 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:19:26,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-14 18:19:27,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:19:27,094 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-10-14 18:19:27,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:19:27,095 INFO L85 PathProgramCache]: Analyzing trace with hash 323751582, now seen corresponding path program 3 times [2024-10-14 18:19:27,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:19:27,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256574331] [2024-10-14 18:19:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:19:27,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:19:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:19:27,343 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:19:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:19:27,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-14 18:19:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:19:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 18:19:27,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:19:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256574331] [2024-10-14 18:19:27,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256574331] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:19:27,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776345164] [2024-10-14 18:19:27,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 18:19:27,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:19:27,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:19:27,353 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:19:27,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-14 18:19:27,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-14 18:19:27,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 18:19:27,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-14 18:19:27,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:19:27,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2024-10-14 18:19:27,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:19:27,625 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2024-10-14 18:19:27,626 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 1 case distinctions, treesize of input 28 treesize of output 24 [2024-10-14 18:19:27,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-14 18:19:27,843 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 47 treesize of output 31 [2024-10-14 18:19:27,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-14 18:19:27,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:19:27,943 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 32 treesize of output 23 [2024-10-14 18:19:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 18:19:27,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:19:28,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776345164] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:19:28,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:19:28,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2024-10-14 18:19:28,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529658698] [2024-10-14 18:19:28,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:19:28,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 18:19:28,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:19:28,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 18:19:28,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-10-14 18:19:28,054 INFO L87 Difference]: Start difference. First operand 239 states and 295 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 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)