./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/list-simple/sll2c_append_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 19:00:54,996 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 19:00:55,033 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 19:00:55,048 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 19:00:55,049 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 19:00:55,082 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 19:00:55,082 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 19:00:55,083 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 19:00:55,083 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 19:00:55,085 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 19:00:55,086 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 19:00:55,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 19:00:55,087 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 19:00:55,087 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 19:00:55,087 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 19:00:55,087 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 19:00:55,087 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 19:00:55,088 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 19:00:55,088 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 19:00:55,088 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 19:00:55,089 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 19:00:55,089 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 19:00:55,090 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 19:00:55,090 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 19:00:55,090 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 19:00:55,090 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 19:00:55,090 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 19:00:55,091 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 19:00:55,091 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 19:00:55,091 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 19:00:55,091 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 19:00:55,092 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 19:00:55,092 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 19:00:55,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 19:00:55,092 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 19:00:55,093 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 19:00:55,093 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 19:00:55,093 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 19:00:55,093 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 19:00:55,093 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 19:00:55,093 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 19:00:55,094 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 19:00:55,094 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 [2024-11-22 19:00:55,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 19:00:55,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 19:00:55,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 19:00:55,292 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 19:00:55,292 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 19:00:55,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2024-11-22 19:00:56,566 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 19:00:56,737 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 19:00:56,738 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2024-11-22 19:00:56,747 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fee5e3dc/d312a66f2fb940438ddb48c0dfc74cf8/FLAG3356f7942 [2024-11-22 19:00:57,120 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fee5e3dc/d312a66f2fb940438ddb48c0dfc74cf8 [2024-11-22 19:00:57,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 19:00:57,123 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 19:00:57,124 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 19:00:57,124 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 19:00:57,128 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 19:00:57,128 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,129 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75304928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57, skipping insertion in model container [2024-11-22 19:00:57,129 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,161 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 19:00:57,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 19:00:57,416 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 19:00:57,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 19:00:57,489 INFO L204 MainTranslator]: Completed translation [2024-11-22 19:00:57,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57 WrapperNode [2024-11-22 19:00:57,489 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 19:00:57,490 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 19:00:57,490 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 19:00:57,490 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 19:00:57,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,506 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,525 INFO L138 Inliner]: procedures = 127, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 169 [2024-11-22 19:00:57,527 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 19:00:57,528 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 19:00:57,528 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 19:00:57,528 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 19:00:57,535 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,538 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,562 INFO L175 MemorySlicer]: Split 28 memory accesses to 3 slices as follows [2, 10, 16]. 57 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 8 writes are split as follows [0, 1, 7]. [2024-11-22 19:00:57,563 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,563 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,571 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,574 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,576 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,578 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,581 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 19:00:57,582 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 19:00:57,582 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 19:00:57,582 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 19:00:57,583 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (1/1) ... [2024-11-22 19:00:57,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 19:00:57,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:00:57,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 19:00:57,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 19:00:57,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 19:00:57,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 19:00:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 19:00:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 19:00:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 19:00:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 19:00:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-22 19:00:57,671 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-22 19:00:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 19:00:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 19:00:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-22 19:00:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-22 19:00:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-22 19:00:57,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-22 19:00:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-22 19:00:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-22 19:00:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-22 19:00:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 19:00:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-22 19:00:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-22 19:00:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-22 19:00:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 19:00:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 19:00:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 19:00:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 19:00:57,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 19:00:57,784 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 19:00:57,786 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 19:00:58,122 INFO L? ?]: Removed 147 outVars from TransFormulas that were not future-live. [2024-11-22 19:00:58,122 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 19:00:58,136 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 19:00:58,137 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-22 19:00:58,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:00:58 BoogieIcfgContainer [2024-11-22 19:00:58,137 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 19:00:58,140 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 19:00:58,140 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 19:00:58,142 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 19:00:58,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 07:00:57" (1/3) ... [2024-11-22 19:00:58,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cdba217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:00:58, skipping insertion in model container [2024-11-22 19:00:58,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:00:57" (2/3) ... [2024-11-22 19:00:58,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cdba217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:00:58, skipping insertion in model container [2024-11-22 19:00:58,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:00:58" (3/3) ... [2024-11-22 19:00:58,145 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_append_unequal.i [2024-11-22 19:00:58,157 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 19:00:58,157 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2024-11-22 19:00:58,199 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 19:00:58,205 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;@5de02871, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 19:00:58,206 INFO L334 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2024-11-22 19:00:58,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 130 states have internal predecessors, (147), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:00:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-22 19:00:58,215 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:00:58,216 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 19:00:58,216 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:00:58,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:00:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash 896229653, now seen corresponding path program 1 times [2024-11-22 19:00:58,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:00:58,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601376278] [2024-11-22 19:00:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:00:58,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:00:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:00:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:00:58,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:00:58,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601376278] [2024-11-22 19:00:58,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601376278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:00:58,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:00:58,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 19:00:58,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391072623] [2024-11-22 19:00:58,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:00:58,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 19:00:58,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:00:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 19:00:58,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:00:58,476 INFO L87 Difference]: Start difference. First operand has 135 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 130 states have internal predecessors, (147), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 19:00:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:00:58,595 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2024-11-22 19:00:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 19:00:58,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-22 19:00:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:00:58,604 INFO L225 Difference]: With dead ends: 132 [2024-11-22 19:00:58,604 INFO L226 Difference]: Without dead ends: 129 [2024-11-22 19:00:58,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:00:58,608 INFO L432 NwaCegarLoop]: 136 mSDtfsCounter, 2 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:00:58,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 216 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:00:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-22 19:00:58,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2024-11-22 19:00:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 124 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:00:58,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2024-11-22 19:00:58,649 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 6 [2024-11-22 19:00:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:00:58,650 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2024-11-22 19:00:58,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 19:00:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2024-11-22 19:00:58,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-22 19:00:58,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:00:58,651 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 19:00:58,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 19:00:58,651 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:00:58,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:00:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash 896229654, now seen corresponding path program 1 times [2024-11-22 19:00:58,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:00:58,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947857902] [2024-11-22 19:00:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:00:58,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:00:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:00:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:00:58,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:00:58,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947857902] [2024-11-22 19:00:58,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947857902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:00:58,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:00:58,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 19:00:58,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691620688] [2024-11-22 19:00:58,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:00:58,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 19:00:58,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:00:58,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 19:00:58,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:00:58,753 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 19:00:58,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:00:58,830 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2024-11-22 19:00:58,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 19:00:58,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-22 19:00:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:00:58,832 INFO L225 Difference]: With dead ends: 127 [2024-11-22 19:00:58,832 INFO L226 Difference]: Without dead ends: 127 [2024-11-22 19:00:58,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:00:58,834 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 2 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:00:58,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 217 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:00:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-22 19:00:58,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-11-22 19:00:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 69 states have (on average 1.8985507246376812) internal successors, (131), 122 states have internal predecessors, (131), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:00:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2024-11-22 19:00:58,844 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 6 [2024-11-22 19:00:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:00:58,844 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2024-11-22 19:00:58,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 19:00:58,846 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2024-11-22 19:00:58,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-22 19:00:58,847 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:00:58,847 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:00:58,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 19:00:58,847 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:00:58,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:00:58,848 INFO L85 PathProgramCache]: Analyzing trace with hash -308727593, now seen corresponding path program 1 times [2024-11-22 19:00:58,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:00:58,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31750031] [2024-11-22 19:00:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:00:58,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:00:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:00:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:00:58,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:00:58,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31750031] [2024-11-22 19:00:58,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31750031] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:00:58,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:00:58,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 19:00:58,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168784901] [2024-11-22 19:00:58,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:00:58,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 19:00:58,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:00:58,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 19:00:58,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:00:58,931 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:00:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:00:58,943 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2024-11-22 19:00:58,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 19:00:58,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-22 19:00:58,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:00:58,947 INFO L225 Difference]: With dead ends: 134 [2024-11-22 19:00:58,947 INFO L226 Difference]: Without dead ends: 134 [2024-11-22 19:00:58,947 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:00:58,948 INFO L432 NwaCegarLoop]: 135 mSDtfsCounter, 5 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 19:00:58,948 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 265 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 19:00:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-22 19:00:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2024-11-22 19:00:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 70 states have (on average 1.8857142857142857) internal successors, (132), 123 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:00:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2024-11-22 19:00:58,956 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 13 [2024-11-22 19:00:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:00:58,956 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2024-11-22 19:00:58,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:00:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2024-11-22 19:00:58,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-22 19:00:58,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:00:58,958 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:00:58,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 19:00:58,959 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:00:58,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:00:58,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1757828636, now seen corresponding path program 1 times [2024-11-22 19:00:58,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:00:58,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977189088] [2024-11-22 19:00:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:00:58,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:00:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:00:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 19:00:59,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:00:59,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977189088] [2024-11-22 19:00:59,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977189088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:00:59,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:00:59,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 19:00:59,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658089865] [2024-11-22 19:00:59,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:00:59,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 19:00:59,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:00:59,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 19:00:59,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 19:00:59,093 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 19:00:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:00:59,263 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2024-11-22 19:00:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 19:00:59,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-22 19:00:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:00:59,264 INFO L225 Difference]: With dead ends: 127 [2024-11-22 19:00:59,264 INFO L226 Difference]: Without dead ends: 127 [2024-11-22 19:00:59,264 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 19:00:59,265 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 2 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 19:00:59,266 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 413 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 19:00:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-22 19:00:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-11-22 19:00:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 70 states have (on average 1.8714285714285714) internal successors, (131), 122 states have internal predecessors, (131), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:00:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2024-11-22 19:00:59,284 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 22 [2024-11-22 19:00:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:00:59,285 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2024-11-22 19:00:59,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 19:00:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2024-11-22 19:00:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-22 19:00:59,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:00:59,285 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:00:59,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 19:00:59,286 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:00:59,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:00:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1757828637, now seen corresponding path program 1 times [2024-11-22 19:00:59,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:00:59,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220247949] [2024-11-22 19:00:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:00:59,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:00:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:00:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:00:59,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:00:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220247949] [2024-11-22 19:00:59,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220247949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:00:59,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:00:59,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 19:00:59,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324269800] [2024-11-22 19:00:59,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:00:59,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 19:00:59,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:00:59,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 19:00:59,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 19:00:59,471 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 19:00:59,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:00:59,598 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2024-11-22 19:00:59,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 19:00:59,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-22 19:00:59,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:00:59,599 INFO L225 Difference]: With dead ends: 126 [2024-11-22 19:00:59,599 INFO L226 Difference]: Without dead ends: 126 [2024-11-22 19:00:59,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 19:00:59,601 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 1 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:00:59,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 437 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:00:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-22 19:00:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-22 19:00:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 70 states have (on average 1.8571428571428572) internal successors, (130), 121 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:00:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2024-11-22 19:00:59,613 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 22 [2024-11-22 19:00:59,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:00:59,613 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2024-11-22 19:00:59,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 19:00:59,613 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2024-11-22 19:00:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-22 19:00:59,614 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:00:59,614 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:00:59,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 19:00:59,614 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:00:59,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:00:59,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1063356219, now seen corresponding path program 1 times [2024-11-22 19:00:59,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:00:59,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602711594] [2024-11-22 19:00:59,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:00:59,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:00:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:00:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:00:59,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:00:59,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602711594] [2024-11-22 19:00:59,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602711594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:00:59,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531004134] [2024-11-22 19:00:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:00:59,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:00:59,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:00:59,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:00:59,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 19:00:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:00:59,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 19:00:59,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:00:59,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 19:00:59,975 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-22 19:01:00,011 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-22 19:01:00,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-22 19:01:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-22 19:01:00,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:01:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:01:00,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531004134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 19:01:00,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 19:01:00,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 11 [2024-11-22 19:01:00,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499575113] [2024-11-22 19:01:00,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 19:01:00,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 19:01:00,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:00,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 19:01:00,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2024-11-22 19:01:00,176 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 19:01:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:00,387 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2024-11-22 19:01:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 19:01:00,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2024-11-22 19:01:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:00,389 INFO L225 Difference]: With dead ends: 125 [2024-11-22 19:01:00,389 INFO L226 Difference]: Without dead ends: 125 [2024-11-22 19:01:00,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=101, Unknown=1, NotChecked=20, Total=156 [2024-11-22 19:01:00,390 INFO L432 NwaCegarLoop]: 124 mSDtfsCounter, 2 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:00,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 539 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 375 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2024-11-22 19:01:00,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-22 19:01:00,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-11-22 19:01:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 70 states have (on average 1.8428571428571427) internal successors, (129), 120 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2024-11-22 19:01:00,399 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 25 [2024-11-22 19:01:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:00,399 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2024-11-22 19:01:00,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 19:01:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2024-11-22 19:01:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-22 19:01:00,400 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:00,400 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:00,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 19:01:00,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-22 19:01:00,601 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:00,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:00,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1063356218, now seen corresponding path program 1 times [2024-11-22 19:01:00,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:00,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319130819] [2024-11-22 19:01:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:00,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:01:00,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:00,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319130819] [2024-11-22 19:01:00,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319130819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:00,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329859786] [2024-11-22 19:01:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:00,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:00,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:00,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:00,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 19:01:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:00,968 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-22 19:01:00,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:00,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 19:01:00,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 19:01:01,102 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-22 19:01:01,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:01,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 19:01:01,141 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 19:01:01,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 19:01:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-22 19:01:01,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:01:01,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329859786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:01,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:01:01,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2024-11-22 19:01:01,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098504800] [2024-11-22 19:01:01,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:01:01,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 19:01:01,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:01,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 19:01:01,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=257, Unknown=1, NotChecked=32, Total=342 [2024-11-22 19:01:01,275 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 19:01:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:01,708 INFO L93 Difference]: Finished difference Result 132 states and 145 transitions. [2024-11-22 19:01:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 19:01:01,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2024-11-22 19:01:01,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:01,711 INFO L225 Difference]: With dead ends: 132 [2024-11-22 19:01:01,711 INFO L226 Difference]: Without dead ends: 132 [2024-11-22 19:01:01,711 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2024-11-22 19:01:01,712 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 2 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:01,712 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 799 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 785 Invalid, 0 Unknown, 139 Unchecked, 0.4s Time] [2024-11-22 19:01:01,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-22 19:01:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2024-11-22 19:01:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 75 states have (on average 1.8) internal successors, (135), 125 states have internal predecessors, (135), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 19:01:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2024-11-22 19:01:01,720 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 25 [2024-11-22 19:01:01,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:01,720 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2024-11-22 19:01:01,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 19:01:01,720 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2024-11-22 19:01:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-22 19:01:01,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:01,721 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:01,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 19:01:01,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-22 19:01:01,922 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:01,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:01,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1391365729, now seen corresponding path program 1 times [2024-11-22 19:01:01,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:01,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112391470] [2024-11-22 19:01:01,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:01,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 19:01:02,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:02,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112391470] [2024-11-22 19:01:02,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112391470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:02,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913555561] [2024-11-22 19:01:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:02,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:02,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:02,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:02,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 19:01:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:02,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-22 19:01:02,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:02,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 19:01:02,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:01:02,401 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 19:01:02,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 19:01:02,451 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 [2024-11-22 19:01:02,459 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2024-11-22 19:01:02,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:02,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 19:01:02,527 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-22 19:01:02,544 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-22 19:01:02,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-22 19:01:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 18 not checked. [2024-11-22 19:01:02,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:01:02,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913555561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:02,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:01:02,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2024-11-22 19:01:02,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803906070] [2024-11-22 19:01:02,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:01:02,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 19:01:02,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:02,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 19:01:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=316, Unknown=2, NotChecked=74, Total=462 [2024-11-22 19:01:02,721 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 19 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-22 19:01:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:03,177 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2024-11-22 19:01:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 19:01:03,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-11-22 19:01:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:03,178 INFO L225 Difference]: With dead ends: 140 [2024-11-22 19:01:03,178 INFO L226 Difference]: Without dead ends: 140 [2024-11-22 19:01:03,179 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=415, Unknown=2, NotChecked=86, Total=600 [2024-11-22 19:01:03,179 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 123 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:03,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 605 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 712 Invalid, 0 Unknown, 276 Unchecked, 0.4s Time] [2024-11-22 19:01:03,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-22 19:01:03,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 122. [2024-11-22 19:01:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.68) internal successors, (126), 116 states have internal predecessors, (126), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 19:01:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 134 transitions. [2024-11-22 19:01:03,182 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 134 transitions. Word has length 37 [2024-11-22 19:01:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:03,183 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 134 transitions. [2024-11-22 19:01:03,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-22 19:01:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 134 transitions. [2024-11-22 19:01:03,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-22 19:01:03,184 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:03,184 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:03,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 19:01:03,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:03,384 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:03,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1391365728, now seen corresponding path program 1 times [2024-11-22 19:01:03,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:03,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487440324] [2024-11-22 19:01:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:03,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:01:03,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:03,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487440324] [2024-11-22 19:01:03,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487440324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:03,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98219509] [2024-11-22 19:01:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:03,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:03,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:03,775 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:03,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 19:01:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:03,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 19:01:03,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:03,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 19:01:03,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:01:03,898 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-22 19:01:03,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:03,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 19:01:03,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:01:03,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:03,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 19:01:04,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:01:04,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:04,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 19:01:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-22 19:01:04,086 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 19:01:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98219509] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:01:04,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 19:01:04,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 15 [2024-11-22 19:01:04,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035502769] [2024-11-22 19:01:04,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:01:04,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 19:01:04,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:04,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 19:01:04,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=170, Unknown=1, NotChecked=26, Total=240 [2024-11-22 19:01:04,088 INFO L87 Difference]: Start difference. First operand 122 states and 134 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 19:01:04,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:04,196 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2024-11-22 19:01:04,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 19:01:04,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-11-22 19:01:04,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:04,197 INFO L225 Difference]: With dead ends: 117 [2024-11-22 19:01:04,198 INFO L226 Difference]: Without dead ends: 117 [2024-11-22 19:01:04,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2024-11-22 19:01:04,198 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 23 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:04,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 280 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 148 Unchecked, 0.1s Time] [2024-11-22 19:01:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-22 19:01:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-22 19:01:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 75 states have (on average 1.6133333333333333) internal successors, (121), 111 states have internal predecessors, (121), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-22 19:01:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2024-11-22 19:01:04,203 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 37 [2024-11-22 19:01:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:04,203 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2024-11-22 19:01:04,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 19:01:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2024-11-22 19:01:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-22 19:01:04,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:04,206 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:04,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 19:01:04,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:04,407 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:04,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:04,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1220627380, now seen corresponding path program 2 times [2024-11-22 19:01:04,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:04,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064891520] [2024-11-22 19:01:04,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:01:04,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:04,440 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:01:04,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:01:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-22 19:01:04,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:04,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064891520] [2024-11-22 19:01:04,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064891520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:04,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920863456] [2024-11-22 19:01:04,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:01:04,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:04,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:04,486 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:04,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 19:01:04,590 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:01:04,590 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:01:04,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 19:01:04,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 19:01:04,607 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 19:01:04,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920863456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:01:04,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 19:01:04,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-11-22 19:01:04,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553517338] [2024-11-22 19:01:04,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:01:04,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 19:01:04,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:04,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 19:01:04,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-22 19:01:04,608 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 19:01:04,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:04,618 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2024-11-22 19:01:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 19:01:04,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-11-22 19:01:04,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:04,619 INFO L225 Difference]: With dead ends: 110 [2024-11-22 19:01:04,619 INFO L226 Difference]: Without dead ends: 110 [2024-11-22 19:01:04,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-22 19:01:04,620 INFO L432 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:04,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 228 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 19:01:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-22 19:01:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-11-22 19:01:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 70 states have (on average 1.6142857142857143) internal successors, (113), 105 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2024-11-22 19:01:04,622 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 37 [2024-11-22 19:01:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:04,623 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2024-11-22 19:01:04,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 19:01:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2024-11-22 19:01:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-22 19:01:04,624 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:04,625 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:04,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 19:01:04,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-22 19:01:04,829 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:04,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1367636320, now seen corresponding path program 1 times [2024-11-22 19:01:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:04,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648470329] [2024-11-22 19:01:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:04,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 19:01:04,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:04,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648470329] [2024-11-22 19:01:04,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648470329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:01:04,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:01:04,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 19:01:04,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259878206] [2024-11-22 19:01:04,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:01:04,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 19:01:04,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 19:01:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 19:01:04,903 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 19:01:05,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:05,011 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2024-11-22 19:01:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 19:01:05,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (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 39 [2024-11-22 19:01:05,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:05,012 INFO L225 Difference]: With dead ends: 108 [2024-11-22 19:01:05,013 INFO L226 Difference]: Without dead ends: 108 [2024-11-22 19:01:05,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 19:01:05,014 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 19 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:05,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 343 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:01:05,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-22 19:01:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-11-22 19:01:05,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.5857142857142856) internal successors, (111), 103 states have internal predecessors, (111), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2024-11-22 19:01:05,016 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 39 [2024-11-22 19:01:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:05,017 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2024-11-22 19:01:05,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 19:01:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2024-11-22 19:01:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-22 19:01:05,018 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:05,018 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:05,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 19:01:05,018 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:05,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:05,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1367636319, now seen corresponding path program 1 times [2024-11-22 19:01:05,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:05,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369386402] [2024-11-22 19:01:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:05,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 19:01:05,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369386402] [2024-11-22 19:01:05,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369386402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914740228] [2024-11-22 19:01:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:05,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:05,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:05,199 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:05,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 19:01:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:05,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 19:01:05,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:05,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 19:01:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 19:01:05,387 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 19:01:05,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914740228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:01:05,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 19:01:05,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2024-11-22 19:01:05,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009623942] [2024-11-22 19:01:05,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:01:05,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 19:01:05,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:05,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 19:01:05,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2024-11-22 19:01:05,389 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 19:01:05,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:05,499 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2024-11-22 19:01:05,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 19:01:05,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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 39 [2024-11-22 19:01:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:05,500 INFO L225 Difference]: With dead ends: 106 [2024-11-22 19:01:05,500 INFO L226 Difference]: Without dead ends: 106 [2024-11-22 19:01:05,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2024-11-22 19:01:05,501 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 18 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:05,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 351 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:01:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-22 19:01:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-22 19:01:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.5571428571428572) internal successors, (109), 101 states have internal predecessors, (109), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2024-11-22 19:01:05,503 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 39 [2024-11-22 19:01:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:05,503 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2024-11-22 19:01:05,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 19:01:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2024-11-22 19:01:05,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 19:01:05,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:05,504 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:05,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-22 19:01:05,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:05,709 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:05,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash -38264347, now seen corresponding path program 1 times [2024-11-22 19:01:05,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:05,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856506886] [2024-11-22 19:01:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:05,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 19:01:05,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:05,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856506886] [2024-11-22 19:01:05,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856506886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:05,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651298999] [2024-11-22 19:01:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:05,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:05,984 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:05,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 19:01:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:06,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-22 19:01:06,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:06,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-22 19:01:06,198 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-22 19:01:06,213 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-22 19:01:06,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-22 19:01:06,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-22 19:01:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 19:01:06,244 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 19:01:06,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651298999] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:01:06,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 19:01:06,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 20 [2024-11-22 19:01:06,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898585033] [2024-11-22 19:01:06,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:01:06,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 19:01:06,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:06,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 19:01:06,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=332, Unknown=1, NotChecked=36, Total=420 [2024-11-22 19:01:06,246 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 19:01:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:06,407 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2024-11-22 19:01:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 19:01:06,407 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-11-22 19:01:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:06,408 INFO L225 Difference]: With dead ends: 105 [2024-11-22 19:01:06,408 INFO L226 Difference]: Without dead ends: 105 [2024-11-22 19:01:06,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=443, Unknown=1, NotChecked=42, Total=552 [2024-11-22 19:01:06,409 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 22 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:06,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 433 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 284 Invalid, 0 Unknown, 173 Unchecked, 0.1s Time] [2024-11-22 19:01:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-22 19:01:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-11-22 19:01:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.5352112676056338) internal successors, (109), 100 states have internal predecessors, (109), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2024-11-22 19:01:06,411 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 41 [2024-11-22 19:01:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:06,412 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2024-11-22 19:01:06,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 19:01:06,412 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2024-11-22 19:01:06,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 19:01:06,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:06,412 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:06,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 19:01:06,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:06,613 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:06,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:06,614 INFO L85 PathProgramCache]: Analyzing trace with hash -38264346, now seen corresponding path program 1 times [2024-11-22 19:01:06,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:06,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446549149] [2024-11-22 19:01:06,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:06,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:01:06,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446549149] [2024-11-22 19:01:06,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446549149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993246630] [2024-11-22 19:01:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:06,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:06,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:06,949 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:06,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 19:01:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:07,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-22 19:01:07,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:07,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 19:01:07,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-22 19:01:07,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-22 19:01:07,365 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_5| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_5|) 0) 0))) is different from true [2024-11-22 19:01:07,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:07,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 19:01:07,410 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-22 19:01:07,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-22 19:01:07,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-22 19:01:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-22 19:01:07,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:01:07,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993246630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:07,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:01:07,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2024-11-22 19:01:07,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390074846] [2024-11-22 19:01:07,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:01:07,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 19:01:07,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:07,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 19:01:07,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=849, Unknown=1, NotChecked=58, Total=992 [2024-11-22 19:01:07,694 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 28 states, 26 states have (on average 2.423076923076923) internal successors, (63), 24 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:01:08,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:08,536 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2024-11-22 19:01:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 19:01:08,536 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.423076923076923) internal successors, (63), 24 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2024-11-22 19:01:08,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:08,537 INFO L225 Difference]: With dead ends: 116 [2024-11-22 19:01:08,537 INFO L226 Difference]: Without dead ends: 116 [2024-11-22 19:01:08,538 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=1725, Unknown=1, NotChecked=84, Total=1980 [2024-11-22 19:01:08,538 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 111 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:08,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1283 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1253 Invalid, 0 Unknown, 119 Unchecked, 0.6s Time] [2024-11-22 19:01:08,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-22 19:01:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2024-11-22 19:01:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 81 states have (on average 1.4691358024691359) internal successors, (119), 110 states have internal predecessors, (119), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2024-11-22 19:01:08,541 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 41 [2024-11-22 19:01:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:08,542 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2024-11-22 19:01:08,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.423076923076923) internal successors, (63), 24 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:01:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2024-11-22 19:01:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-22 19:01:08,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:08,542 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:08,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 19:01:08,742 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,SelfDestructingSolverStorable13 [2024-11-22 19:01:08,743 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:08,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:08,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1193827988, now seen corresponding path program 1 times [2024-11-22 19:01:08,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:08,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75252803] [2024-11-22 19:01:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:08,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 19:01:08,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:08,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75252803] [2024-11-22 19:01:08,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75252803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:08,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726094904] [2024-11-22 19:01:08,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:08,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:08,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:08,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:08,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 19:01:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:09,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 19:01:09,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:09,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 19:01:09,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:01:09,077 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-22 19:01:09,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:09,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 19:01:09,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:01:09,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:09,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 19:01:09,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:01:09,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:09,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-22 19:01:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-22 19:01:09,239 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 19:01:09,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726094904] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:01:09,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 19:01:09,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2024-11-22 19:01:09,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000750352] [2024-11-22 19:01:09,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:01:09,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 19:01:09,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:09,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 19:01:09,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=133, Unknown=1, NotChecked=22, Total=182 [2024-11-22 19:01:09,240 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 19:01:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:09,301 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2024-11-22 19:01:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 19:01:09,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2024-11-22 19:01:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:09,302 INFO L225 Difference]: With dead ends: 112 [2024-11-22 19:01:09,303 INFO L226 Difference]: Without dead ends: 112 [2024-11-22 19:01:09,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=133, Unknown=1, NotChecked=22, Total=182 [2024-11-22 19:01:09,303 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 52 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:09,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 188 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2024-11-22 19:01:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-22 19:01:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-11-22 19:01:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 81 states have (on average 1.4197530864197532) internal successors, (115), 106 states have internal predecessors, (115), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2024-11-22 19:01:09,306 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 42 [2024-11-22 19:01:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:09,306 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2024-11-22 19:01:09,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 19:01:09,306 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2024-11-22 19:01:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-22 19:01:09,307 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:09,307 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:09,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-22 19:01:09,510 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,SelfDestructingSolverStorable14 [2024-11-22 19:01:09,510 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:09,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:09,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1478313521, now seen corresponding path program 1 times [2024-11-22 19:01:09,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:09,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17132227] [2024-11-22 19:01:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:09,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-22 19:01:09,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:09,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17132227] [2024-11-22 19:01:09,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17132227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:01:09,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:01:09,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 19:01:09,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838377329] [2024-11-22 19:01:09,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:01:09,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 19:01:09,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:09,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 19:01:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-22 19:01:09,705 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 19:01:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:09,898 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2024-11-22 19:01:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 19:01:09,898 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-11-22 19:01:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:09,899 INFO L225 Difference]: With dead ends: 152 [2024-11-22 19:01:09,899 INFO L226 Difference]: Without dead ends: 152 [2024-11-22 19:01:09,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-22 19:01:09,900 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 85 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:09,900 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 507 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 19:01:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-22 19:01:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 117. [2024-11-22 19:01:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.3908045977011494) internal successors, (121), 111 states have internal predecessors, (121), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2024-11-22 19:01:09,902 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 46 [2024-11-22 19:01:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:09,902 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2024-11-22 19:01:09,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 19:01:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2024-11-22 19:01:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-22 19:01:09,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:09,903 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:09,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-22 19:01:09,903 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:09,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:09,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1478313522, now seen corresponding path program 1 times [2024-11-22 19:01:09,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:09,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515418779] [2024-11-22 19:01:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:09,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 19:01:10,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:10,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515418779] [2024-11-22 19:01:10,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515418779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:10,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867487547] [2024-11-22 19:01:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:10,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:10,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:10,043 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:10,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 19:01:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:10,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 19:01:10,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:10,384 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 19:01:10,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:01:10,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2024-11-22 19:01:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:01:10,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:01:10,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:01:10,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2024-11-22 19:01:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 19:01:10,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867487547] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 19:01:10,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 19:01:10,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 23 [2024-11-22 19:01:10,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676061461] [2024-11-22 19:01:10,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 19:01:10,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 19:01:10,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:10,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 19:01:10,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-11-22 19:01:10,577 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-22 19:01:14,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 19:01:18,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 19:01:22,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 19:01:26,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 19:01:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:26,846 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2024-11-22 19:01:26,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 19:01:26,847 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2024-11-22 19:01:26,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:26,848 INFO L225 Difference]: With dead ends: 109 [2024-11-22 19:01:26,848 INFO L226 Difference]: Without dead ends: 109 [2024-11-22 19:01:26,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-11-22 19:01:26,848 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 151 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:26,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1419 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 420 Invalid, 4 Unknown, 0 Unchecked, 16.2s Time] [2024-11-22 19:01:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-22 19:01:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-22 19:01:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.4050632911392404) internal successors, (111), 103 states have internal predecessors, (111), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 117 transitions. [2024-11-22 19:01:26,852 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 117 transitions. Word has length 46 [2024-11-22 19:01:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:26,852 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 117 transitions. [2024-11-22 19:01:26,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-22 19:01:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 117 transitions. [2024-11-22 19:01:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-22 19:01:26,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:26,852 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:26,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 19:01:27,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 19:01:27,056 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:27,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:27,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1384633144, now seen corresponding path program 1 times [2024-11-22 19:01:27,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:27,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387985269] [2024-11-22 19:01:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:27,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:01:27,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:27,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387985269] [2024-11-22 19:01:27,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387985269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:27,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642859270] [2024-11-22 19:01:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:27,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:27,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:27,855 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:27,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 19:01:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:28,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-22 19:01:28,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:28,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 19:01:28,143 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 19:01:28,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 19:01:28,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:01:28,273 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-22 19:01:28,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-22 19:01:28,379 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 38 treesize of output 14 [2024-11-22 19:01:28,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:01:28,443 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#2.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.base| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.base|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)))) is different from true [2024-11-22 19:01:28,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:28,466 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 46 treesize of output 35 [2024-11-22 19:01:28,493 INFO L349 Elim1Store]: treesize reduction 84, result has 37.8 percent of original size [2024-11-22 19:01:28,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 65 [2024-11-22 19:01:28,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 45 [2024-11-22 19:01:28,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 38 [2024-11-22 19:01:28,849 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 33 treesize of output 17 [2024-11-22 19:01:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-22 19:01:28,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:01:29,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642859270] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:29,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:01:29,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 44 [2024-11-22 19:01:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043276478] [2024-11-22 19:01:29,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:01:29,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-22 19:01:29,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-22 19:01:29,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1844, Unknown=1, NotChecked=86, Total=2070 [2024-11-22 19:01:29,039 INFO L87 Difference]: Start difference. First operand 109 states and 117 transitions. Second operand has 45 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 39 states have internal predecessors, (74), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:01:29,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:29,956 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2024-11-22 19:01:29,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 19:01:29,957 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 39 states have internal predecessors, (74), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2024-11-22 19:01:29,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:29,957 INFO L225 Difference]: With dead ends: 111 [2024-11-22 19:01:29,957 INFO L226 Difference]: Without dead ends: 111 [2024-11-22 19:01:29,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=227, Invalid=2638, Unknown=1, NotChecked=104, Total=2970 [2024-11-22 19:01:29,958 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 114 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:29,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1541 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1470 Invalid, 0 Unknown, 111 Unchecked, 0.6s Time] [2024-11-22 19:01:29,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-22 19:01:29,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-22 19:01:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.4074074074074074) internal successors, (114), 105 states have internal predecessors, (114), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2024-11-22 19:01:29,961 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 46 [2024-11-22 19:01:29,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:29,961 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2024-11-22 19:01:29,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 39 states have internal predecessors, (74), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:01:29,961 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2024-11-22 19:01:29,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-22 19:01:29,962 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:29,962 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:29,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 19:01:30,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 19:01:30,166 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:30,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:30,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1384633143, now seen corresponding path program 1 times [2024-11-22 19:01:30,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:30,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036009153] [2024-11-22 19:01:30,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:30,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:01:31,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:31,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036009153] [2024-11-22 19:01:31,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036009153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:31,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272317524] [2024-11-22 19:01:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:31,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:31,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:31,252 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:31,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 19:01:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:31,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-22 19:01:31,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:31,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 19:01:31,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 19:01:31,694 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 19:01:31,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 19:01:31,704 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 19:01:31,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 19:01:31,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:01:31,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:01:31,906 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-22 19:01:31,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2024-11-22 19:01:31,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-22 19:01:32,107 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 43 treesize of output 19 [2024-11-22 19:01:32,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-22 19:01:32,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:01:32,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:01:32,295 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_9| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_9|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#2.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.base| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.base|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= (store |c_old(#memory_$Pointer$#2.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.offset| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.offset|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2024-11-22 19:01:32,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:32,318 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 51 treesize of output 34 [2024-11-22 19:01:32,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:32,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-11-22 19:01:32,336 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-22 19:01:32,336 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 28 treesize of output 30 [2024-11-22 19:01:32,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-22 19:01:32,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2024-11-22 19:01:32,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-22 19:01:32,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-22 19:01:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-22 19:01:32,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:01:32,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272317524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:32,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:01:32,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2024-11-22 19:01:32,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015136359] [2024-11-22 19:01:32,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:01:32,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-22 19:01:32,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:32,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-22 19:01:32,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2803, Unknown=1, NotChecked=106, Total=3080 [2024-11-22 19:01:32,976 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand has 49 states, 45 states have (on average 1.711111111111111) internal successors, (77), 42 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:01:34,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:34,809 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2024-11-22 19:01:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 19:01:34,809 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 1.711111111111111) internal successors, (77), 42 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2024-11-22 19:01:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:34,810 INFO L225 Difference]: With dead ends: 115 [2024-11-22 19:01:34,810 INFO L226 Difference]: Without dead ends: 115 [2024-11-22 19:01:34,811 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=350, Invalid=5203, Unknown=1, NotChecked=146, Total=5700 [2024-11-22 19:01:34,811 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 118 mSDsluCounter, 1718 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:34,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1796 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2278 Invalid, 0 Unknown, 121 Unchecked, 1.0s Time] [2024-11-22 19:01:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-22 19:01:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2024-11-22 19:01:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 108 states have internal predecessors, (117), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2024-11-22 19:01:34,814 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 46 [2024-11-22 19:01:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:34,814 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2024-11-22 19:01:34,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 1.711111111111111) internal successors, (77), 42 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:01:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2024-11-22 19:01:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-22 19:01:34,815 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:34,815 INFO L215 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:34,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 19:01:35,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:35,015 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:35,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:35,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1770682309, now seen corresponding path program 2 times [2024-11-22 19:01:35,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:35,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105431147] [2024-11-22 19:01:35,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:01:35,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:35,041 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:01:35,042 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:01:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:01:35,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:35,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105431147] [2024-11-22 19:01:35,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105431147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:35,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824878287] [2024-11-22 19:01:35,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:01:35,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:35,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:35,924 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:35,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 19:01:36,059 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:01:36,059 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:01:36,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-22 19:01:36,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:36,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 19:01:36,227 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 19:01:36,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 19:01:36,303 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 [2024-11-22 19:01:36,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:01:36,407 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-22 19:01:36,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 35 [2024-11-22 19:01:36,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-22 19:01:36,589 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-22 19:01:36,589 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 61 treesize of output 24 [2024-11-22 19:01:36,595 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 15 treesize of output 3 [2024-11-22 19:01:36,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:01:36,624 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#2.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.base| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.base|) (= (store |c_old(#memory_$Pointer$#2.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.offset| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.offset|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-22 19:01:36,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:36,648 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-22 19:01:36,648 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 69 treesize of output 58 [2024-11-22 19:01:36,663 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-11-22 19:01:36,663 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 32 treesize of output 34 [2024-11-22 19:01:36,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-22 19:01:36,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 50 [2024-11-22 19:01:36,944 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 23 treesize of output 7 [2024-11-22 19:01:37,171 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 32 [2024-11-22 19:01:37,260 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 19:01:37,264 INFO L349 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2024-11-22 19:01:37,264 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 31 treesize of output 17 [2024-11-22 19:01:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-22 19:01:37,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:01:37,462 INFO L349 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2024-11-22 19:01:37,462 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 20 treesize of output 19 [2024-11-22 19:01:37,707 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1722 (Array Int Int)) (v_ArrVal_1721 (Array Int Int)) (|v_node_create_~temp~0#1.base_65| Int) (|v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_25| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)) (.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (< (select (select (store |c_#memory_$Pointer$#2.offset| |v_node_create_~temp~0#1.base_65| v_ArrVal_1721) .cse0) .cse1) |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_25|) (= (select (let ((.cse2 (store |c_#memory_$Pointer$#2.base| |v_node_create_~temp~0#1.base_65| v_ArrVal_1722))) (select .cse2 (select (select .cse2 .cse0) .cse1))) |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_25|) .cse0) (not (= (select |c_#valid| |v_node_create_~temp~0#1.base_65|) 0)) (< |v_ULTIMATE.start_sll_circular_append_~last~1#1.offset_25| 0)))) is different from false [2024-11-22 19:01:37,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824878287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:37,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:01:37,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 50 [2024-11-22 19:01:37,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934471999] [2024-11-22 19:01:37,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:01:37,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-22 19:01:37,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:37,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-22 19:01:37,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2929, Unknown=2, NotChecked=218, Total=3306 [2024-11-22 19:01:37,710 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand has 51 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 45 states have internal predecessors, (82), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:01:39,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:39,318 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2024-11-22 19:01:39,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-22 19:01:39,318 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 45 states have internal predecessors, (82), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2024-11-22 19:01:39,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:39,319 INFO L225 Difference]: With dead ends: 117 [2024-11-22 19:01:39,319 INFO L226 Difference]: Without dead ends: 117 [2024-11-22 19:01:39,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=314, Invalid=5242, Unknown=2, NotChecked=294, Total=5852 [2024-11-22 19:01:39,320 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 141 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 2036 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:39,320 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 2036 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1950 Invalid, 0 Unknown, 118 Unchecked, 0.8s Time] [2024-11-22 19:01:39,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-22 19:01:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2024-11-22 19:01:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 86 states have (on average 1.3953488372093024) internal successors, (120), 110 states have internal predecessors, (120), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2024-11-22 19:01:39,323 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 51 [2024-11-22 19:01:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:39,323 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2024-11-22 19:01:39,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 45 states have internal predecessors, (82), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:01:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2024-11-22 19:01:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-22 19:01:39,324 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:39,324 INFO L215 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:39,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-22 19:01:39,524 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,SelfDestructingSolverStorable19 [2024-11-22 19:01:39,525 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:39,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:39,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1770682310, now seen corresponding path program 2 times [2024-11-22 19:01:39,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:39,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633125816] [2024-11-22 19:01:39,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:01:39,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:39,545 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:01:39,545 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:01:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:01:40,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:40,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633125816] [2024-11-22 19:01:40,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633125816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:40,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456194362] [2024-11-22 19:01:40,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:01:40,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:40,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:40,572 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:40,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 19:01:40,772 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:01:40,772 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:01:40,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-22 19:01:40,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:40,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 19:01:40,954 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 19:01:40,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 19:01:41,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:01:41,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:01:41,134 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-22 19:01:41,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2024-11-22 19:01:41,139 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2024-11-22 19:01:41,296 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2024-11-22 19:01:41,296 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 80 treesize of output 39 [2024-11-22 19:01:41,300 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:01:41,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:01:41,468 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_11| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_11|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#2.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.base| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.base|) (= (store |c_old(#memory_$Pointer$#2.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.offset| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.offset|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2024-11-22 19:01:41,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:41,495 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-22 19:01:41,496 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 88 treesize of output 71 [2024-11-22 19:01:41,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:41,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:41,501 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 59 treesize of output 51 [2024-11-22 19:01:41,510 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-22 19:01:41,510 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 28 treesize of output 30 [2024-11-22 19:01:41,886 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2024-11-22 19:01:41,886 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 90 treesize of output 37 [2024-11-22 19:01:41,888 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:01:41,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:01:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-22 19:01:41,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:01:42,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456194362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:42,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:01:42,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 56 [2024-11-22 19:01:42,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853143737] [2024-11-22 19:01:42,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:01:42,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-22 19:01:42,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:42,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-22 19:01:42,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3134, Unknown=1, NotChecked=112, Total=3422 [2024-11-22 19:01:42,198 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 56 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 49 states have internal predecessors, (84), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:01:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:44,086 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2024-11-22 19:01:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-22 19:01:44,087 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 49 states have internal predecessors, (84), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2024-11-22 19:01:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:44,087 INFO L225 Difference]: With dead ends: 104 [2024-11-22 19:01:44,087 INFO L226 Difference]: Without dead ends: 104 [2024-11-22 19:01:44,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=383, Invalid=6262, Unknown=1, NotChecked=160, Total=6806 [2024-11-22 19:01:44,089 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 77 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:44,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 2294 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2078 Invalid, 0 Unknown, 108 Unchecked, 0.9s Time] [2024-11-22 19:01:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-22 19:01:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2024-11-22 19:01:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.3506493506493507) internal successors, (104), 97 states have internal predecessors, (104), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2024-11-22 19:01:44,091 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 51 [2024-11-22 19:01:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:44,091 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2024-11-22 19:01:44,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 49 states have internal predecessors, (84), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 19:01:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2024-11-22 19:01:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-22 19:01:44,092 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:44,092 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:44,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-22 19:01:44,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:44,293 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:44,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:44,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1760160393, now seen corresponding path program 1 times [2024-11-22 19:01:44,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:44,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317843870] [2024-11-22 19:01:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:44,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-22 19:01:44,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:44,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317843870] [2024-11-22 19:01:44,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317843870] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:01:44,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:01:44,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 19:01:44,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552917483] [2024-11-22 19:01:44,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:01:44,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 19:01:44,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:44,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 19:01:44,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-22 19:01:44,467 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 19:01:44,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:44,567 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2024-11-22 19:01:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 19:01:44,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-11-22 19:01:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:44,569 INFO L225 Difference]: With dead ends: 109 [2024-11-22 19:01:44,569 INFO L226 Difference]: Without dead ends: 109 [2024-11-22 19:01:44,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-22 19:01:44,570 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 69 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:44,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 368 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:01:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-22 19:01:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2024-11-22 19:01:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 78 states have (on average 1.358974358974359) internal successors, (106), 98 states have internal predecessors, (106), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2024-11-22 19:01:44,572 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 53 [2024-11-22 19:01:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:44,572 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2024-11-22 19:01:44,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-22 19:01:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2024-11-22 19:01:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-22 19:01:44,573 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:44,573 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:44,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-22 19:01:44,573 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:44,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:44,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1760160392, now seen corresponding path program 1 times [2024-11-22 19:01:44,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:44,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461251811] [2024-11-22 19:01:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:44,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 19:01:44,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:44,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461251811] [2024-11-22 19:01:44,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461251811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:44,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826232535] [2024-11-22 19:01:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:44,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:44,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:44,870 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:44,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 19:01:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:45,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-22 19:01:45,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:45,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 19:01:45,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-22 19:01:45,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-22 19:01:45,230 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_22| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_22|) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2024-11-22 19:01:45,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:45,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 19:01:45,256 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-22 19:01:45,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-22 19:01:45,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-22 19:01:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-22 19:01:45,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:01:45,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826232535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:45,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:01:45,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2024-11-22 19:01:45,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605305826] [2024-11-22 19:01:45,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:01:45,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-22 19:01:45,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:45,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-22 19:01:45,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=905, Unknown=1, NotChecked=60, Total=1056 [2024-11-22 19:01:45,530 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 29 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-22 19:01:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:46,071 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2024-11-22 19:01:46,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 19:01:46,072 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2024-11-22 19:01:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:46,072 INFO L225 Difference]: With dead ends: 121 [2024-11-22 19:01:46,072 INFO L226 Difference]: Without dead ends: 121 [2024-11-22 19:01:46,073 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=1796, Unknown=1, NotChecked=86, Total=2070 [2024-11-22 19:01:46,073 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 203 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:46,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1088 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1056 Invalid, 0 Unknown, 124 Unchecked, 0.4s Time] [2024-11-22 19:01:46,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-22 19:01:46,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 107. [2024-11-22 19:01:46,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 81 states have (on average 1.345679012345679) internal successors, (109), 101 states have internal predecessors, (109), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2024-11-22 19:01:46,075 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 53 [2024-11-22 19:01:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:46,076 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2024-11-22 19:01:46,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-22 19:01:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2024-11-22 19:01:46,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-22 19:01:46,076 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:46,076 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:46,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-22 19:01:46,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:46,277 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:46,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:46,277 INFO L85 PathProgramCache]: Analyzing trace with hash 317516697, now seen corresponding path program 1 times [2024-11-22 19:01:46,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:46,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909447541] [2024-11-22 19:01:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:46,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-22 19:01:46,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:46,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909447541] [2024-11-22 19:01:46,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909447541] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:01:46,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:01:46,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 19:01:46,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913847106] [2024-11-22 19:01:46,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:01:46,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 19:01:46,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:46,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 19:01:46,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-22 19:01:46,368 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 19:01:46,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:46,464 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2024-11-22 19:01:46,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 19:01:46,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 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 56 [2024-11-22 19:01:46,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:46,465 INFO L225 Difference]: With dead ends: 124 [2024-11-22 19:01:46,465 INFO L226 Difference]: Without dead ends: 124 [2024-11-22 19:01:46,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-22 19:01:46,466 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 58 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:46,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 455 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:01:46,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-22 19:01:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2024-11-22 19:01:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.3414634146341464) internal successors, (110), 101 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2024-11-22 19:01:46,468 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 56 [2024-11-22 19:01:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:46,468 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2024-11-22 19:01:46,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 19:01:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2024-11-22 19:01:46,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-22 19:01:46,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:46,469 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:46,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-22 19:01:46,469 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:46,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:46,469 INFO L85 PathProgramCache]: Analyzing trace with hash 317516698, now seen corresponding path program 1 times [2024-11-22 19:01:46,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:46,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019639299] [2024-11-22 19:01:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:46,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:01:47,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:47,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019639299] [2024-11-22 19:01:47,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019639299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:47,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384680883] [2024-11-22 19:01:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:47,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:47,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:47,073 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:47,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 19:01:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:47,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-22 19:01:47,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:47,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 19:01:47,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 19:01:47,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-22 19:01:47,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-22 19:01:47,463 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_23| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_9|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_23|) 0))) is different from true [2024-11-22 19:01:47,487 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-22 19:01:47,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-22 19:01:47,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 19:01:47,560 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-22 19:01:47,560 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 15 treesize of output 7 [2024-11-22 19:01:47,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-22 19:01:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-22 19:01:47,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:01:47,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384680883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:47,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:01:47,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 35 [2024-11-22 19:01:47,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548111281] [2024-11-22 19:01:47,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:01:47,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-22 19:01:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-22 19:01:47,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1356, Unknown=1, NotChecked=74, Total=1560 [2024-11-22 19:01:47,865 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand has 36 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 32 states have internal predecessors, (87), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-22 19:01:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:01:48,407 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2024-11-22 19:01:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-22 19:01:48,407 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 32 states have internal predecessors, (87), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 56 [2024-11-22 19:01:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:01:48,408 INFO L225 Difference]: With dead ends: 121 [2024-11-22 19:01:48,408 INFO L226 Difference]: Without dead ends: 121 [2024-11-22 19:01:48,408 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=226, Invalid=2129, Unknown=1, NotChecked=94, Total=2450 [2024-11-22 19:01:48,409 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 257 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 19:01:48,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 730 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 872 Invalid, 0 Unknown, 123 Unchecked, 0.3s Time] [2024-11-22 19:01:48,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-22 19:01:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2024-11-22 19:01:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 84 states have (on average 1.3333333333333333) internal successors, (112), 103 states have internal predecessors, (112), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:01:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2024-11-22 19:01:48,411 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 56 [2024-11-22 19:01:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:01:48,411 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2024-11-22 19:01:48,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 32 states have internal predecessors, (87), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-22 19:01:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2024-11-22 19:01:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-22 19:01:48,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:01:48,412 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:01:48,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-22 19:01:48,612 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,SelfDestructingSolverStorable24 [2024-11-22 19:01:48,613 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:01:48,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:01:48,613 INFO L85 PathProgramCache]: Analyzing trace with hash 190921248, now seen corresponding path program 1 times [2024-11-22 19:01:48,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:01:48,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981770569] [2024-11-22 19:01:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:48,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:01:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 19:01:49,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:01:49,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981770569] [2024-11-22 19:01:49,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981770569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:49,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583216648] [2024-11-22 19:01:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:01:49,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:01:49,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:01:49,246 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:01:49,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 19:01:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:01:49,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-22 19:01:49,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:01:49,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 19:01:49,509 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 19:01:49,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 19:01:49,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:01:49,622 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-22 19:01:49,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-22 19:01:49,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-22 19:01:49,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:01:49,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:01:49,890 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 38 treesize of output 27 [2024-11-22 19:01:49,909 INFO L349 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2024-11-22 19:01:49,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 52 [2024-11-22 19:01:50,432 INFO L349 Elim1Store]: treesize reduction 67, result has 33.0 percent of original size [2024-11-22 19:01:50,432 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 57 [2024-11-22 19:01:51,119 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 50 treesize of output 33 [2024-11-22 19:01:52,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:01:52,012 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 83 treesize of output 67 [2024-11-22 19:01:52,055 INFO L349 Elim1Store]: treesize reduction 12, result has 83.6 percent of original size [2024-11-22 19:01:52,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 84 [2024-11-22 19:01:52,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-22 19:01:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:01:52,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:01:52,334 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2418 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2418) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) 1)) is different from false [2024-11-22 19:01:56,342 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2418 (Array Int Int)) (v_ArrVal_2417 Int)) (= (select |c_#valid| (select (select (store (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base| (store (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_append_~last~1#1.offset| v_ArrVal_2417)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2418) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) 1)) is different from false [2024-11-22 19:01:56,880 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2418 (Array Int Int)) (|ULTIMATE.start_sll_circular_append_~head#1.offset| Int) (|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_34| Int) (v_ArrVal_2424 (Array Int Int)) (|ULTIMATE.start_sll_circular_append_~head#1.base| Int) (v_ArrVal_2425 Int) (v_ArrVal_2417 Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$#1.base| |ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|))) (let ((.cse2 (select (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_34| v_ArrVal_2424) .cse1)) (.cse0 (select (select |c_#memory_$Pointer$#1.offset| |ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|))) (or (< .cse0 0) (= (select (store |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_34| v_ArrVal_2425) (select (select (store (store |c_#memory_$Pointer$#2.base| .cse1 (store .cse2 .cse0 v_ArrVal_2417)) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_34| v_ArrVal_2418) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) 1) (not (= .cse1 (select .cse2 .cse0))) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_34|) 0)))))) is different from false [2024-11-22 19:01:56,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583216648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:01:56,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:01:56,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32] total 51 [2024-11-22 19:01:56,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859907411] [2024-11-22 19:01:56,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:01:56,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-22 19:01:56,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:01:56,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-22 19:01:56,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3225, Unknown=4, NotChecked=348, Total=3782 [2024-11-22 19:01:56,883 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand has 52 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 45 states have internal predecessors, (97), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:01,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 19:02:07,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 19:02:11,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 19:02:12,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:12,555 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2024-11-22 19:02:12,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-22 19:02:12,555 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 45 states have internal predecessors, (97), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2024-11-22 19:02:12,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:12,556 INFO L225 Difference]: With dead ends: 130 [2024-11-22 19:02:12,556 INFO L226 Difference]: Without dead ends: 130 [2024-11-22 19:02:12,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=421, Invalid=5749, Unknown=4, NotChecked=468, Total=6642 [2024-11-22 19:02:12,558 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 156 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 10 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:12,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1326 Invalid, 1808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1795 Invalid, 3 Unknown, 0 Unchecked, 12.8s Time] [2024-11-22 19:02:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-22 19:02:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2024-11-22 19:02:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 105 states have internal predecessors, (114), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:12,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2024-11-22 19:02:12,561 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 58 [2024-11-22 19:02:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:12,561 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2024-11-22 19:02:12,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 45 states have internal predecessors, (97), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:12,562 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2024-11-22 19:02:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-22 19:02:12,562 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:12,562 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:12,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-22 19:02:12,763 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,SelfDestructingSolverStorable25 [2024-11-22 19:02:12,763 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:02:12,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:12,763 INFO L85 PathProgramCache]: Analyzing trace with hash -741215842, now seen corresponding path program 1 times [2024-11-22 19:02:12,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:12,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587311479] [2024-11-22 19:02:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:12,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 19:02:14,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587311479] [2024-11-22 19:02:14,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587311479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401665629] [2024-11-22 19:02:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:14,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:14,035 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:02:14,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 19:02:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:14,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-22 19:02:14,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:14,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 19:02:14,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 19:02:14,436 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 19:02:14,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 19:02:14,448 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 19:02:14,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 19:02:14,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:02:14,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:02:14,630 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-22 19:02:14,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2024-11-22 19:02:14,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-22 19:02:14,770 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 43 treesize of output 19 [2024-11-22 19:02:14,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:02:14,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:14,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-22 19:02:15,038 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-22 19:02:15,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2024-11-22 19:02:15,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:15,048 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 51 treesize of output 34 [2024-11-22 19:02:15,059 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-22 19:02:15,059 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 28 treesize of output 30 [2024-11-22 19:02:15,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-11-22 19:02:15,369 INFO L349 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2024-11-22 19:02:15,369 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 53 treesize of output 48 [2024-11-22 19:02:15,379 INFO L349 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2024-11-22 19:02:15,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2024-11-22 19:02:15,536 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2024-11-22 19:02:15,536 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 79 [2024-11-22 19:02:15,550 INFO L349 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2024-11-22 19:02:15,550 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 106 [2024-11-22 19:02:15,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:15,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:15,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:16,015 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 239 treesize of output 163 [2024-11-22 19:02:16,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:02:16,609 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 160 treesize of output 116 [2024-11-22 19:02:16,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:02:16,624 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 132 [2024-11-22 19:02:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 19:02:16,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:16,964 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (and (forall ((v_ArrVal_2579 (Array Int Int)) (v_ArrVal_2580 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2580) .cse0) .cse1) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2579) .cse0) .cse1)))) (forall ((v_ArrVal_2580 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2580) .cse0) .cse1))))) is different from false [2024-11-22 19:02:18,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401665629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:18,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:18,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2024-11-22 19:02:18,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78003593] [2024-11-22 19:02:18,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:18,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-22 19:02:18,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:18,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-22 19:02:18,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3205, Unknown=46, NotChecked=114, Total=3540 [2024-11-22 19:02:18,012 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand has 56 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 48 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:20,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:20,500 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2024-11-22 19:02:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-22 19:02:20,502 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 48 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2024-11-22 19:02:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:20,503 INFO L225 Difference]: With dead ends: 147 [2024-11-22 19:02:20,503 INFO L226 Difference]: Without dead ends: 147 [2024-11-22 19:02:20,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=455, Invalid=6811, Unknown=48, NotChecked=168, Total=7482 [2024-11-22 19:02:20,503 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 245 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:20,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1643 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-22 19:02:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-22 19:02:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2024-11-22 19:02:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.302325581395349) internal successors, (112), 104 states have internal predecessors, (112), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2024-11-22 19:02:20,507 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 63 [2024-11-22 19:02:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:20,507 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2024-11-22 19:02:20,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 48 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2024-11-22 19:02:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-22 19:02:20,507 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:20,508 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:20,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-22 19:02:20,708 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,SelfDestructingSolverStorable26 [2024-11-22 19:02:20,708 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-22 19:02:20,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:20,709 INFO L85 PathProgramCache]: Analyzing trace with hash 607626655, now seen corresponding path program 1 times [2024-11-22 19:02:20,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:20,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289705686] [2024-11-22 19:02:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:20,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:02:22,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:22,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289705686] [2024-11-22 19:02:22,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289705686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:22,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287923543] [2024-11-22 19:02:22,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:22,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:22,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:22,317 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:02:22,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-22 19:02:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:22,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-22 19:02:22,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:22,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 19:02:22,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-22 19:02:22,795 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 19:02:22,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 19:02:22,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-22 19:02:22,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:02:23,000 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-22 19:02:23,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2024-11-22 19:02:23,002 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 26 treesize of output 13 [2024-11-22 19:02:23,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2024-11-22 19:02:23,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-11-22 19:02:23,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-22 19:02:23,345 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-22 19:02:23,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2024-11-22 19:02:23,349 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 11 treesize of output 3 [2024-11-22 19:02:23,359 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-22 19:02:23,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-22 19:02:23,364 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 29 treesize of output 24 [2024-11-22 19:02:23,640 INFO L349 Elim1Store]: treesize reduction 41, result has 46.1 percent of original size [2024-11-22 19:02:23,640 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 33 treesize of output 39 [2024-11-22 19:02:23,659 INFO L349 Elim1Store]: treesize reduction 37, result has 45.6 percent of original size [2024-11-22 19:02:23,659 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 36 treesize of output 40 [2024-11-22 19:02:23,746 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 47 treesize of output 42 [2024-11-22 19:02:23,749 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 47 treesize of output 42 [2024-11-22 19:02:23,946 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 53 treesize of output 37 [2024-11-22 19:02:24,080 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 42 treesize of output 26 [2024-11-22 19:02:24,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-11-22 19:02:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 19:02:24,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:24,817 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_2743 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#2| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2743) .cse0) (+ .cse1 4)))) (forall ((v_ArrVal_2744 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2744) .cse0) .cse1) .cse0))))) is different from false [2024-11-22 19:02:24,839 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_append_~last~1#1.base| Int) (|ULTIMATE.start_sll_circular_append_~last~1#1.offset| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_2744 (Array Int Int)) (v_ArrVal_2740 Int)) (not (= (select (select (store (store |c_#memory_$Pointer$#2.base| |ULTIMATE.start_sll_circular_append_~last~1#1.base| (store (select |c_#memory_$Pointer$#2.base| |ULTIMATE.start_sll_circular_append_~last~1#1.base|) |ULTIMATE.start_sll_circular_append_~last~1#1.offset| v_ArrVal_2740)) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2744) .cse0) .cse1) .cse0))) (forall ((v_ArrVal_2743 (Array Int Int)) (v_ArrVal_2742 (Array Int Int))) (or (not (= v_ArrVal_2742 (store (select |c_#memory_int#2| |ULTIMATE.start_sll_circular_append_~last~1#1.base|) |ULTIMATE.start_sll_circular_append_~last~1#1.offset| (select v_ArrVal_2742 |ULTIMATE.start_sll_circular_append_~last~1#1.offset|)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#2| |ULTIMATE.start_sll_circular_append_~last~1#1.base| v_ArrVal_2742) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_2743) .cse0) (+ .cse1 4)))))))) is different from false [2024-11-22 19:02:24,943 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_append_~last~1#1.base| Int) (v_ArrVal_2744 (Array Int Int)) (v_ArrVal_2743 (Array Int Int)) (v_ArrVal_2742 (Array Int Int)) (v_ArrVal_2740 Int) (|ULTIMATE.start_sll_circular_append_~last~1#1.offset| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#2| |ULTIMATE.start_sll_circular_append_~last~1#1.base| v_ArrVal_2742) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2743) .cse0) (+ .cse1 4))) (not (= .cse0 (select (select (store (store |c_#memory_$Pointer$#2.base| |ULTIMATE.start_sll_circular_append_~last~1#1.base| (store (select |c_#memory_$Pointer$#2.base| |ULTIMATE.start_sll_circular_append_~last~1#1.base|) |ULTIMATE.start_sll_circular_append_~last~1#1.offset| v_ArrVal_2740)) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2744) .cse0) .cse1))) (not (= v_ArrVal_2742 (store (select |c_#memory_int#2| |ULTIMATE.start_sll_circular_append_~last~1#1.base|) |ULTIMATE.start_sll_circular_append_~last~1#1.offset| (select v_ArrVal_2742 |ULTIMATE.start_sll_circular_append_~last~1#1.offset|))))))) is different from false [2024-11-22 19:02:25,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287923543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:25,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:25,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 69 [2024-11-22 19:02:25,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136117996] [2024-11-22 19:02:25,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:25,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-22 19:02:25,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:25,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-22 19:02:25,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=5877, Unknown=3, NotChecked=468, Total=6642 [2024-11-22 19:02:25,109 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 69 states, 66 states have (on average 1.696969696969697) internal successors, (112), 60 states have internal predecessors, (112), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)