./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_append_equal.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/sll2n_append_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 19:02:17,974 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 19:02:18,020 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 19:02:18,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 19:02:18,025 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 19:02:18,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 19:02:18,048 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 19:02:18,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 19:02:18,048 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 19:02:18,049 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 19:02:18,050 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 19:02:18,050 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 19:02:18,051 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 19:02:18,051 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 19:02:18,052 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 19:02:18,053 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 19:02:18,053 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 19:02:18,054 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 19:02:18,054 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 19:02:18,055 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 19:02:18,056 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 19:02:18,056 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 19:02:18,056 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 19:02:18,056 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 19:02:18,056 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 19:02:18,057 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 19:02:18,057 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 19:02:18,057 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 19:02:18,057 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 19:02:18,057 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 19:02:18,058 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 19:02:18,058 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 19:02:18,058 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 19:02:18,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 19:02:18,059 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 19:02:18,059 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 19:02:18,059 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 19:02:18,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 19:02:18,059 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 19:02:18,059 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 19:02:18,060 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 19:02:18,060 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 19:02:18,060 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 [2024-11-22 19:02:18,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 19:02:18,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 19:02:18,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 19:02:18,291 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 19:02:18,291 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 19:02:18,292 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2024-11-22 19:02:19,554 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 19:02:19,757 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 19:02:19,758 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2024-11-22 19:02:19,767 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f16cc0ec4/7fe843b9e93a403ea61852d371f84223/FLAGbb737d504 [2024-11-22 19:02:20,105 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f16cc0ec4/7fe843b9e93a403ea61852d371f84223 [2024-11-22 19:02:20,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 19:02:20,108 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 19:02:20,109 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 19:02:20,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 19:02:20,113 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 19:02:20,113 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43b0bb8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20, skipping insertion in model container [2024-11-22 19:02:20,114 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,145 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 19:02:20,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 19:02:20,405 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 19:02:20,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 19:02:20,471 INFO L204 MainTranslator]: Completed translation [2024-11-22 19:02:20,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20 WrapperNode [2024-11-22 19:02:20,471 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 19:02:20,472 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 19:02:20,472 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 19:02:20,473 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 19:02:20,478 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,488 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,522 INFO L138 Inliner]: procedures = 127, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 126 [2024-11-22 19:02:20,523 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 19:02:20,523 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 19:02:20,524 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 19:02:20,524 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 19:02:20,533 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,533 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,536 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,550 INFO L175 MemorySlicer]: Split 17 memory accesses to 3 slices as follows [2, 6, 9]. 53 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 5 writes are split as follows [0, 1, 4]. [2024-11-22 19:02:20,550 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,550 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,556 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,559 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,560 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,561 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 19:02:20,567 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 19:02:20,567 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 19:02:20,567 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 19:02:20,568 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (1/1) ... [2024-11-22 19:02:20,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 19:02:20,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:20,599 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 19:02:20,609 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 19:02:20,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 19:02:20,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 19:02:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 19:02:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 19:02:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 19:02:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 19:02:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-22 19:02:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-22 19:02:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 19:02:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 19:02:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-22 19:02:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-22 19:02:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-22 19:02:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-22 19:02:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-22 19:02:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-22 19:02:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-22 19:02:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 19:02:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-22 19:02:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-22 19:02:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-22 19:02:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 19:02:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 19:02:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 19:02:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 19:02:20,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 19:02:20,813 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 19:02:20,815 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 19:02:21,028 INFO L? ?]: Removed 97 outVars from TransFormulas that were not future-live. [2024-11-22 19:02:21,028 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 19:02:21,047 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 19:02:21,047 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 19:02:21,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:02:21 BoogieIcfgContainer [2024-11-22 19:02:21,047 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 19:02:21,049 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 19:02:21,049 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 19:02:21,052 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 19:02:21,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 07:02:20" (1/3) ... [2024-11-22 19:02:21,053 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68aaaffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:02:21, skipping insertion in model container [2024-11-22 19:02:21,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:02:20" (2/3) ... [2024-11-22 19:02:21,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68aaaffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:02:21, skipping insertion in model container [2024-11-22 19:02:21,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:02:21" (3/3) ... [2024-11-22 19:02:21,055 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2024-11-22 19:02:21,068 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 19:02:21,069 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2024-11-22 19:02:21,111 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 19:02:21,119 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;@1d73d35b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 19:02:21,120 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-22 19:02:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 85 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-22 19:02:21,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:21,130 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:21,130 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:21,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:21,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1814181817, now seen corresponding path program 1 times [2024-11-22 19:02:21,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:21,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547674240] [2024-11-22 19:02:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:21,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:21,329 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 19:02:21,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:21,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547674240] [2024-11-22 19:02:21,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547674240] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:21,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:02:21,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 19:02:21,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716341750] [2024-11-22 19:02:21,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:21,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 19:02:21,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:21,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 19:02:21,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:02:21,362 INFO L87 Difference]: Start difference. First operand has 89 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 85 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 19:02:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:21,446 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2024-11-22 19:02:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 19:02:21,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-22 19:02:21,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:21,453 INFO L225 Difference]: With dead ends: 86 [2024-11-22 19:02:21,453 INFO L226 Difference]: Without dead ends: 83 [2024-11-22 19:02:21,455 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 19:02:21,459 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 2 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:21,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 140 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:02:21,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-22 19:02:21,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-22 19:02:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 79 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2024-11-22 19:02:21,489 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 7 [2024-11-22 19:02:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:21,489 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2024-11-22 19:02:21,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 19:02:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2024-11-22 19:02:21,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-22 19:02:21,490 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:21,490 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:21,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 19:02:21,490 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:21,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1814181818, now seen corresponding path program 1 times [2024-11-22 19:02:21,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:21,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740247505] [2024-11-22 19:02:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:21,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:21,620 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 19:02:21,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740247505] [2024-11-22 19:02:21,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740247505] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:21,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:02:21,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 19:02:21,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006512001] [2024-11-22 19:02:21,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:21,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 19:02:21,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:21,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 19:02:21,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:02:21,624 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 19:02:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:21,668 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2024-11-22 19:02:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 19:02:21,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-22 19:02:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:21,670 INFO L225 Difference]: With dead ends: 81 [2024-11-22 19:02:21,670 INFO L226 Difference]: Without dead ends: 81 [2024-11-22 19:02:21,670 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 19:02:21,671 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:21,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 19:02:21,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-22 19:02:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-22 19:02:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 77 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2024-11-22 19:02:21,676 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 7 [2024-11-22 19:02:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:21,677 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2024-11-22 19:02:21,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 19:02:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2024-11-22 19:02:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-22 19:02:21,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:21,677 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:21,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 19:02:21,678 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:21,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:21,678 INFO L85 PathProgramCache]: Analyzing trace with hash -724758592, now seen corresponding path program 1 times [2024-11-22 19:02:21,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:21,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860357666] [2024-11-22 19:02:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:21,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:21,817 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 19:02:21,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:21,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860357666] [2024-11-22 19:02:21,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860357666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:21,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:02:21,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 19:02:21,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913610952] [2024-11-22 19:02:21,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:21,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 19:02:21,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:21,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 19:02:21,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 19:02:21,823 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:02:21,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:21,981 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2024-11-22 19:02:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 19:02:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-22 19:02:21,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:21,983 INFO L225 Difference]: With dead ends: 80 [2024-11-22 19:02:21,986 INFO L226 Difference]: Without dead ends: 80 [2024-11-22 19:02:21,986 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 19:02:21,987 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:21,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 263 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:02:21,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-22 19:02:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-22 19:02:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 76 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2024-11-22 19:02:21,996 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 13 [2024-11-22 19:02:21,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:21,997 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2024-11-22 19:02:21,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:02:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2024-11-22 19:02:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-22 19:02:21,998 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:21,998 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:21,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 19:02:21,998 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:21,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:21,998 INFO L85 PathProgramCache]: Analyzing trace with hash -724758591, now seen corresponding path program 1 times [2024-11-22 19:02:21,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:21,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169566877] [2024-11-22 19:02:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:21,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:22,150 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 19:02:22,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:22,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169566877] [2024-11-22 19:02:22,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169566877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:22,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:02:22,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 19:02:22,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798612065] [2024-11-22 19:02:22,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:22,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 19:02:22,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:22,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 19:02:22,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 19:02:22,152 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:02:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:22,245 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2024-11-22 19:02:22,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 19:02:22,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-22 19:02:22,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:22,247 INFO L225 Difference]: With dead ends: 79 [2024-11-22 19:02:22,247 INFO L226 Difference]: Without dead ends: 79 [2024-11-22 19:02:22,247 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 19:02:22,248 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 1 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:22,248 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 279 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:02:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-22 19:02:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-11-22 19:02:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 49 states have (on average 1.653061224489796) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2024-11-22 19:02:22,252 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 13 [2024-11-22 19:02:22,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:22,252 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2024-11-22 19:02:22,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:02:22,252 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2024-11-22 19:02:22,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-22 19:02:22,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:22,253 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:22,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 19:02:22,253 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:22,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:22,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1286960960, now seen corresponding path program 1 times [2024-11-22 19:02:22,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:22,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861891740] [2024-11-22 19:02:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:22,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:22,303 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 19:02:22,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:22,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861891740] [2024-11-22 19:02:22,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861891740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:22,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:02:22,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 19:02:22,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448642938] [2024-11-22 19:02:22,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:22,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 19:02:22,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:22,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 19:02:22,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 19:02:22,305 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:02:22,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:22,315 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2024-11-22 19:02:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 19:02:22,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-22 19:02:22,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:22,316 INFO L225 Difference]: With dead ends: 85 [2024-11-22 19:02:22,317 INFO L226 Difference]: Without dead ends: 85 [2024-11-22 19:02:22,317 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 19:02:22,317 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 4 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 163 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 19:02:22,318 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 163 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 19:02:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-22 19:02:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2024-11-22 19:02:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.64) internal successors, (82), 76 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2024-11-22 19:02:22,326 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 15 [2024-11-22 19:02:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:22,326 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2024-11-22 19:02:22,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 19:02:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2024-11-22 19:02:22,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-22 19:02:22,327 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:22,327 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:22,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 19:02:22,330 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:22,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:22,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1129086142, now seen corresponding path program 1 times [2024-11-22 19:02:22,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:22,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487580451] [2024-11-22 19:02:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:22,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 19:02:22,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:22,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487580451] [2024-11-22 19:02:22,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487580451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:22,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327995507] [2024-11-22 19:02:22,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:22,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:22,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:22,412 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 19:02:22,412 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 19:02:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:22,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 19:02:22,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:02:22,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 19:02:22,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327995507] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 19:02:22,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 19:02:22,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-22 19:02:22,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286645221] [2024-11-22 19:02:22,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:22,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 19:02:22,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 19:02:22,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-22 19:02:22,641 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 19:02:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:22,658 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2024-11-22 19:02:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 19:02:22,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-11-22 19:02:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:22,661 INFO L225 Difference]: With dead ends: 86 [2024-11-22 19:02:22,661 INFO L226 Difference]: Without dead ends: 86 [2024-11-22 19:02:22,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-22 19:02:22,662 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 4 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:22,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 241 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 19:02:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-22 19:02:22,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-22 19:02:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.5818181818181818) internal successors, (87), 81 states have internal predecessors, (87), 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 19:02:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2024-11-22 19:02:22,670 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 28 [2024-11-22 19:02:22,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:22,670 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2024-11-22 19:02:22,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 19:02:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2024-11-22 19:02:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 19:02:22,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:22,671 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:22,679 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 19:02:22,872 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 19:02:22,872 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:22,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:22,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2049889280, now seen corresponding path program 2 times [2024-11-22 19:02:22,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:22,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153659272] [2024-11-22 19:02:22,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:02:22,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:22,906 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:02:22,906 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:02:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 19:02:23,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:23,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153659272] [2024-11-22 19:02:23,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153659272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:23,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998942242] [2024-11-22 19:02:23,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:02:23,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:23,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:23,321 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 19:02:23,323 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 19:02:23,421 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:02:23,421 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:02:23,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-22 19:02:23,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:23,454 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 19:02:23,473 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 19:02:23,488 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 19:02:23,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:23,536 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 19:02:23,563 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 19:02:23,577 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-22 19:02:23,637 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 19:02:23,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-22 19:02:23,695 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 19:02:23,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:23,737 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 19:02:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 12 not checked. [2024-11-22 19:02:23,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:23,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998942242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:23,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:23,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2024-11-22 19:02:23,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729665298] [2024-11-22 19:02:23,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:23,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 19:02:23,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 19:02:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=171, Unknown=2, NotChecked=54, Total=272 [2024-11-22 19:02:23,797 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 16 states, 14 states have (on average 3.5) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-22 19:02:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:24,081 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2024-11-22 19:02:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 19:02:24,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.5) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2024-11-22 19:02:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:24,082 INFO L225 Difference]: With dead ends: 93 [2024-11-22 19:02:24,082 INFO L226 Difference]: Without dead ends: 93 [2024-11-22 19:02:24,083 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=245, Unknown=2, NotChecked=66, Total=380 [2024-11-22 19:02:24,083 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 64 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:24,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 326 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 326 Invalid, 0 Unknown, 174 Unchecked, 0.2s Time] [2024-11-22 19:02:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-22 19:02:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2024-11-22 19:02:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.490909090909091) internal successors, (82), 76 states have internal predecessors, (82), 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 19:02:24,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2024-11-22 19:02:24,087 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 41 [2024-11-22 19:02:24,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:24,088 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2024-11-22 19:02:24,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.5) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-22 19:02:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2024-11-22 19:02:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-22 19:02:24,089 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:24,089 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:24,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 19:02:24,293 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 19:02:24,294 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:24,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:24,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2049889279, now seen corresponding path program 1 times [2024-11-22 19:02:24,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:24,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100646823] [2024-11-22 19:02:24,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:24,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 19:02:24,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:24,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100646823] [2024-11-22 19:02:24,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100646823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:24,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960225167] [2024-11-22 19:02:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:24,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:24,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:24,733 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 19:02:24,736 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 19:02:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:24,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 19:02:24,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:24,849 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 19:02:24,859 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 19:02:24,868 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 19:02:24,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:24,900 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 19:02:24,928 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 19:02:24,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:24,959 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 19:02:25,001 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 19:02:25,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:25,042 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 19:02:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-22 19:02:25,050 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 19:02:25,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960225167] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:25,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 19:02:25,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 12 [2024-11-22 19:02:25,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794749443] [2024-11-22 19:02:25,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:25,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 19:02:25,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:25,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 19:02:25,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=103, Unknown=1, NotChecked=20, Total=156 [2024-11-22 19:02:25,051 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:25,134 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2024-11-22 19:02:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 19:02:25,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-22 19:02:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:25,136 INFO L225 Difference]: With dead ends: 78 [2024-11-22 19:02:25,136 INFO L226 Difference]: Without dead ends: 78 [2024-11-22 19:02:25,136 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2024-11-22 19:02:25,137 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:25,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 227 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 101 Unchecked, 0.1s Time] [2024-11-22 19:02:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-22 19:02:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-22 19:02:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 73 states have internal predecessors, (79), 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 19:02:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2024-11-22 19:02:25,146 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 41 [2024-11-22 19:02:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:25,146 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2024-11-22 19:02:25,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:25,147 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2024-11-22 19:02:25,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-22 19:02:25,147 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:25,147 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:25,154 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 19:02:25,349 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 19:02:25,349 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:25,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:25,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1587796861, now seen corresponding path program 1 times [2024-11-22 19:02:25,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:25,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086263291] [2024-11-22 19:02:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:25,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 19:02:25,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:25,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086263291] [2024-11-22 19:02:25,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086263291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:25,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675976724] [2024-11-22 19:02:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:25,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:25,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:25,580 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 19:02:25,581 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 19:02:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:25,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-22 19:02:25,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:25,691 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 19:02:25,695 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 19:02:25,721 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 19:02:25,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:25,740 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 19:02:25,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:25,766 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 19:02:25,773 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 19:02:25,774 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 19:02:25,813 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 19:02:25,827 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 19:02:25,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:25,850 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 19:02:25,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:02:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:25,913 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 19:02:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 12 not checked. [2024-11-22 19:02:25,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:26,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675976724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:26,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:26,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2024-11-22 19:02:26,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581934328] [2024-11-22 19:02:26,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:26,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 19:02:26,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:26,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 19:02:26,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=233, Unknown=2, NotChecked=62, Total=342 [2024-11-22 19:02:26,048 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:26,063 WARN L873 $PredicateComparison]: unable to prove that (and (not (= |c_node_create_~temp~0#1.base| 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|)))) (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 19:02:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:26,373 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2024-11-22 19:02:26,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 19:02:26,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2024-11-22 19:02:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:26,374 INFO L225 Difference]: With dead ends: 75 [2024-11-22 19:02:26,374 INFO L226 Difference]: Without dead ends: 75 [2024-11-22 19:02:26,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=586, Unknown=3, NotChecked=156, Total=870 [2024-11-22 19:02:26,375 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 76 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:26,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 466 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 379 Invalid, 0 Unknown, 196 Unchecked, 0.2s Time] [2024-11-22 19:02:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-22 19:02:26,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-22 19:02:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-22 19:02:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2024-11-22 19:02:26,378 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 45 [2024-11-22 19:02:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:26,378 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2024-11-22 19:02:26,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2024-11-22 19:02:26,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-22 19:02:26,378 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:26,379 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:26,386 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 19:02:26,579 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 19:02:26,579 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:26,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:26,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1587643897, now seen corresponding path program 1 times [2024-11-22 19:02:26,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:26,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942151406] [2024-11-22 19:02:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:26,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 19:02:26,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:26,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942151406] [2024-11-22 19:02:26,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942151406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:26,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571967956] [2024-11-22 19:02:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:26,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:26,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:26,937 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 19:02:26,938 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 19:02:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:27,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-22 19:02:27,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:27,087 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 19:02:27,093 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 19:02:27,313 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 19:02:27,316 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 19:02:27,349 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_3| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_3|) 0) 0))) is different from true [2024-11-22 19:02:27,389 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-22 19:02:27,389 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 19:02:27,395 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 19:02:27,470 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 19:02:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2024-11-22 19:02:27,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:27,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571967956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:27,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:27,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2024-11-22 19:02:27,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001026128] [2024-11-22 19:02:27,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:27,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 19:02:27,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:27,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 19:02:27,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=795, Unknown=1, NotChecked=56, Total=930 [2024-11-22 19:02:27,686 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 27 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:28,345 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2024-11-22 19:02:28,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-22 19:02:28,346 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2024-11-22 19:02:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:28,346 INFO L225 Difference]: With dead ends: 86 [2024-11-22 19:02:28,346 INFO L226 Difference]: Without dead ends: 86 [2024-11-22 19:02:28,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=1732, Unknown=1, NotChecked=84, Total=1980 [2024-11-22 19:02:28,348 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 55 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:28,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 684 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 778 Invalid, 0 Unknown, 86 Unchecked, 0.4s Time] [2024-11-22 19:02:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-22 19:02:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-22 19:02:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.390625) internal successors, (89), 80 states have internal predecessors, (89), 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 19:02:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2024-11-22 19:02:28,351 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 45 [2024-11-22 19:02:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:28,351 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2024-11-22 19:02:28,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.76) internal successors, (69), 23 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2024-11-22 19:02:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-22 19:02:28,354 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:28,354 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:28,361 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 19:02:28,554 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 19:02:28,555 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:28,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:28,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1587643898, now seen corresponding path program 1 times [2024-11-22 19:02:28,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:28,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178251836] [2024-11-22 19:02:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:28,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 19:02:28,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:28,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178251836] [2024-11-22 19:02:28,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178251836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:28,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644162425] [2024-11-22 19:02:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:28,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:28,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:28,839 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 19:02:28,840 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 19:02:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:28,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-22 19:02:28,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:28,978 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 6 treesize of output 5 [2024-11-22 19:02:29,075 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 19:02:29,081 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-22 19:02:29,110 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-11-22 19:02:29,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-11-22 19:02:29,122 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 19:02:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2024-11-22 19:02:29,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:29,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644162425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:29,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:29,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2024-11-22 19:02:29,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836156017] [2024-11-22 19:02:29,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:29,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 19:02:29,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:29,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 19:02:29,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=406, Unknown=1, NotChecked=40, Total=506 [2024-11-22 19:02:29,168 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:29,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:29,479 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2024-11-22 19:02:29,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 19:02:29,480 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2024-11-22 19:02:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:29,481 INFO L225 Difference]: With dead ends: 84 [2024-11-22 19:02:29,481 INFO L226 Difference]: Without dead ends: 84 [2024-11-22 19:02:29,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=718, Unknown=1, NotChecked=54, Total=870 [2024-11-22 19:02:29,482 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 44 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:29,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 557 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 553 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2024-11-22 19:02:29,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-22 19:02:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-22 19:02:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.3125) internal successors, (84), 78 states have internal predecessors, (84), 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 19:02:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2024-11-22 19:02:29,485 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 45 [2024-11-22 19:02:29,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:29,485 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2024-11-22 19:02:29,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:02:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2024-11-22 19:02:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-22 19:02:29,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:29,486 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:29,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 19:02:29,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:29,691 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:29,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2045827325, now seen corresponding path program 1 times [2024-11-22 19:02:29,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:29,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461390468] [2024-11-22 19:02:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:29,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:02:30,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461390468] [2024-11-22 19:02:30,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461390468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747999569] [2024-11-22 19:02:30,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:30,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:30,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:30,887 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 19:02:30,888 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 19:02:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:31,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-22 19:02:31,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:31,067 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 19:02:31,431 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 19:02:31,432 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 19:02:31,450 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-22 19:02:31,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-22 19:02:31,554 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 19:02:31,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:02:31,798 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 19:02:31,801 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 19:02:31,804 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 19:02:31,807 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 19:02:31,985 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_5| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_5|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#memory_$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 19:02:32,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:32,018 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 19:02:32,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:32,024 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 19:02:32,037 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-22 19:02:32,037 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 19:02:32,041 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 19:02:32,150 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 19:02:32,266 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 19:02:32,269 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 19:02:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-22 19:02:32,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:32,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747999569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:32,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:32,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2024-11-22 19:02:32,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38076123] [2024-11-22 19:02:32,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:32,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-22 19:02:32,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:32,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-22 19:02:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3035, Unknown=1, NotChecked=110, Total=3306 [2024-11-22 19:02:32,713 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 52 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 45 states have internal predecessors, (85), 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 19:02:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:34,592 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2024-11-22 19:02:34,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-22 19:02:34,592 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 45 states have internal predecessors, (85), 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 49 [2024-11-22 19:02:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:34,593 INFO L225 Difference]: With dead ends: 92 [2024-11-22 19:02:34,593 INFO L226 Difference]: Without dead ends: 92 [2024-11-22 19:02:34,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=379, Invalid=6104, Unknown=1, NotChecked=158, Total=6642 [2024-11-22 19:02:34,595 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 68 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:34,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1292 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1815 Invalid, 0 Unknown, 98 Unchecked, 0.9s Time] [2024-11-22 19:02:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-22 19:02:34,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2024-11-22 19:02:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 82 states have internal predecessors, (90), 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 19:02:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2024-11-22 19:02:34,602 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 49 [2024-11-22 19:02:34,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:34,602 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2024-11-22 19:02:34,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 45 states have internal predecessors, (85), 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 19:02:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2024-11-22 19:02:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-22 19:02:34,603 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:34,603 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:34,611 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 19:02:34,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:34,804 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:34,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:34,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2045827324, now seen corresponding path program 1 times [2024-11-22 19:02:34,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:34,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773345282] [2024-11-22 19:02:34,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:34,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:02:35,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773345282] [2024-11-22 19:02:35,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773345282] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:35,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423812929] [2024-11-22 19:02:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:35,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:35,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:35,744 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 19:02:35,744 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 19:02:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:35,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-22 19:02:35,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:36,029 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 19:02:36,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-22 19:02:36,087 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 19:02:36,245 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 19:02:36,248 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 19:02:36,363 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_6| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_6|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#memory_$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|) (= 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 19:02:36,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:36,380 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 19:02:36,401 INFO L349 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2024-11-22 19:02:36,401 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 34 treesize of output 57 [2024-11-22 19:02:36,523 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 19:02:36,666 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 19:02:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-11-22 19:02:36,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:36,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423812929] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:36,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:36,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 44 [2024-11-22 19:02:36,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262205810] [2024-11-22 19:02:36,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:36,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-22 19:02:36,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:36,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-22 19:02:36,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2097, Unknown=1, NotChecked=92, Total=2352 [2024-11-22 19:02:36,895 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 45 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 39 states have internal predecessors, (83), 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 19:02:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:37,847 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2024-11-22 19:02:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-22 19:02:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 39 states have internal predecessors, (83), 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 49 [2024-11-22 19:02:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:37,848 INFO L225 Difference]: With dead ends: 92 [2024-11-22 19:02:37,848 INFO L226 Difference]: Without dead ends: 92 [2024-11-22 19:02:37,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=308, Invalid=3985, Unknown=1, NotChecked=128, Total=4422 [2024-11-22 19:02:37,850 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 61 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:37,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 960 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1229 Invalid, 0 Unknown, 97 Unchecked, 0.5s Time] [2024-11-22 19:02:37,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-22 19:02:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2024-11-22 19:02:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 82 states have internal predecessors, (89), 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 19:02:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2024-11-22 19:02:37,853 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 49 [2024-11-22 19:02:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:37,853 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2024-11-22 19:02:37,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 39 states have internal predecessors, (83), 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 19:02:37,853 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2024-11-22 19:02:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-22 19:02:37,854 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:37,854 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:37,861 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 19:02:38,054 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,SelfDestructingSolverStorable12 [2024-11-22 19:02:38,055 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:38,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:38,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1555402634, now seen corresponding path program 1 times [2024-11-22 19:02:38,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:38,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973283550] [2024-11-22 19:02:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:38,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-22 19:02:38,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:38,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973283550] [2024-11-22 19:02:38,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973283550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 19:02:38,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 19:02:38,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-22 19:02:38,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842346870] [2024-11-22 19:02:38,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 19:02:38,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 19:02:38,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 19:02:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-22 19:02:38,200 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:38,287 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2024-11-22 19:02:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 19:02:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2024-11-22 19:02:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:38,288 INFO L225 Difference]: With dead ends: 90 [2024-11-22 19:02:38,288 INFO L226 Difference]: Without dead ends: 90 [2024-11-22 19:02:38,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-22 19:02:38,289 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 37 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:38,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 293 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 19:02:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-22 19:02:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-11-22 19:02:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 83 states have internal predecessors, (92), 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 19:02:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2024-11-22 19:02:38,291 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 53 [2024-11-22 19:02:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:38,292 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2024-11-22 19:02:38,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 19:02:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2024-11-22 19:02:38,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-22 19:02:38,292 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:38,292 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:38,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 19:02:38,293 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:38,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:38,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1555402633, now seen corresponding path program 1 times [2024-11-22 19:02:38,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:38,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288422397] [2024-11-22 19:02:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:38,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 19:02:38,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:38,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288422397] [2024-11-22 19:02:38,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288422397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:38,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120930837] [2024-11-22 19:02:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:38,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:38,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:38,600 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 19:02:38,601 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 19:02:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:38,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-22 19:02:38,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:38,733 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 19:02:38,899 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 19:02:38,901 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 19:02:38,946 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_8| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_14|))) (and (<= .cse0 0) (<= 0 (+ .cse0 4)))))) is different from true [2024-11-22 19:02:39,003 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-22 19:02:39,004 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 19:02:39,007 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 19:02:39,149 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 17 treesize of output 9 [2024-11-22 19:02:39,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:02:39,158 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 40 treesize of output 32 [2024-11-22 19:02:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2024-11-22 19:02:39,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:39,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120930837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:39,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:39,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2024-11-22 19:02:39,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304291665] [2024-11-22 19:02:39,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:39,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 19:02:39,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:39,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 19:02:39,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=855, Unknown=1, NotChecked=58, Total=992 [2024-11-22 19:02:39,379 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 28 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-22 19:02:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:39,968 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2024-11-22 19:02:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 19:02:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 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 19:02:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:39,969 INFO L225 Difference]: With dead ends: 92 [2024-11-22 19:02:39,969 INFO L226 Difference]: Without dead ends: 92 [2024-11-22 19:02:39,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1985, Unknown=1, NotChecked=90, Total=2256 [2024-11-22 19:02:39,970 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 83 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:39,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 788 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 888 Invalid, 0 Unknown, 83 Unchecked, 0.3s Time] [2024-11-22 19:02:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-22 19:02:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2024-11-22 19:02:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 85 states have internal predecessors, (93), 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 19:02:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2024-11-22 19:02:39,973 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 53 [2024-11-22 19:02:39,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:39,973 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2024-11-22 19:02:39,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-22 19:02:39,973 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2024-11-22 19:02:39,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-22 19:02:39,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:39,974 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:39,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 19:02:40,174 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 19:02:40,175 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:40,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:40,175 INFO L85 PathProgramCache]: Analyzing trace with hash -206648077, now seen corresponding path program 2 times [2024-11-22 19:02:40,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:40,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46601598] [2024-11-22 19:02:40,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:02:40,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:40,199 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:02:40,200 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:02:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:02:41,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:41,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46601598] [2024-11-22 19:02:41,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46601598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:41,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271573363] [2024-11-22 19:02:41,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 19:02:41,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:41,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:41,568 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 19:02:41,569 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 19:02:41,686 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 19:02:41,686 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 19:02:41,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-22 19:02:41,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:41,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:02:41,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:02:42,053 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 19:02:42,053 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 16 treesize of output 15 [2024-11-22 19:02:42,067 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 19:02:42,067 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 16 treesize of output 15 [2024-11-22 19:02:42,086 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-22 19:02:42,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-22 19:02:42,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-22 19:02:42,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2024-11-22 19:02:42,454 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-22 19:02:42,454 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 84 treesize of output 27 [2024-11-22 19:02:42,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2024-11-22 19:02:42,461 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 19:02:42,487 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 19:02:42,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:42,509 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-22 19:02:42,510 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 92 treesize of output 75 [2024-11-22 19:02:42,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:42,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:02:42,516 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 47 treesize of output 45 [2024-11-22 19:02:42,528 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2024-11-22 19:02:42,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2024-11-22 19:02:42,610 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 89 treesize of output 65 [2024-11-22 19:02:42,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 49 [2024-11-22 19:02:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-22 19:02:42,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:43,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271573363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:43,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:02:43,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 52 [2024-11-22 19:02:43,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263352353] [2024-11-22 19:02:43,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:43,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-22 19:02:43,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:43,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-22 19:02:43,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3021, Unknown=1, NotChecked=110, Total=3306 [2024-11-22 19:02:43,245 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 52 states, 50 states have (on average 1.74) internal successors, (87), 47 states have internal predecessors, (87), 6 states have call successors, (6), 2 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 19:02:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:02:44,367 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2024-11-22 19:02:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-22 19:02:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.74) internal successors, (87), 47 states have internal predecessors, (87), 6 states have call successors, (6), 2 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 53 [2024-11-22 19:02:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:02:44,368 INFO L225 Difference]: With dead ends: 116 [2024-11-22 19:02:44,368 INFO L226 Difference]: Without dead ends: 116 [2024-11-22 19:02:44,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=260, Invalid=4713, Unknown=1, NotChecked=138, Total=5112 [2024-11-22 19:02:44,370 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 17 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-22 19:02:44,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1344 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1260 Invalid, 0 Unknown, 105 Unchecked, 0.6s Time] [2024-11-22 19:02:44,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-22 19:02:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2024-11-22 19:02:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 103 states have internal predecessors, (113), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 19:02:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2024-11-22 19:02:44,373 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 53 [2024-11-22 19:02:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:02:44,373 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2024-11-22 19:02:44,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.74) internal successors, (87), 47 states have internal predecessors, (87), 6 states have call successors, (6), 2 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 19:02:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2024-11-22 19:02:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-22 19:02:44,374 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:02:44,374 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:02:44,381 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 19:02:44,574 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,SelfDestructingSolverStorable15 [2024-11-22 19:02:44,575 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:02:44,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:02:44,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1401043929, now seen corresponding path program 1 times [2024-11-22 19:02:44,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:02:44,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260182047] [2024-11-22 19:02:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:44,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:02:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 19:02:44,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:02:44,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260182047] [2024-11-22 19:02:44,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260182047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:02:44,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307988423] [2024-11-22 19:02:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:02:44,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:02:44,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:02:44,683 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 19:02:44,684 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 19:02:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:02:44,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 19:02:44,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:02:44,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-22 19:02:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 19:02:44,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:02:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-22 19:02:44,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307988423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 19:02:44,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 19:02:44,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 12 [2024-11-22 19:02:44,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427938396] [2024-11-22 19:02:44,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 19:02:44,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 19:02:44,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:02:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 19:02:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-11-22 19:02:44,936 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 19:02:48,946 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 19:02:52,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 19:02:56,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-22 19:03:01,004 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 19:03:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:03:01,085 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2024-11-22 19:03:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 19:03:01,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-11-22 19:03:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:03:01,086 INFO L225 Difference]: With dead ends: 111 [2024-11-22 19:03:01,086 INFO L226 Difference]: Without dead ends: 111 [2024-11-22 19:03:01,086 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-11-22 19:03:01,087 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 77 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2024-11-22 19:03:01,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 520 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 4 Unknown, 0 Unchecked, 16.1s Time] [2024-11-22 19:03:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-22 19:03:01,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-22 19:03:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 103 states have internal predecessors, (112), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 19:03:01,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2024-11-22 19:03:01,089 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 56 [2024-11-22 19:03:01,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:03:01,090 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2024-11-22 19:03:01,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-22 19:03:01,090 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2024-11-22 19:03:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-22 19:03:01,090 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:03:01,090 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:03:01,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-22 19:03:01,290 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,SelfDestructingSolverStorable16 [2024-11-22 19:03:01,291 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:03:01,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:03:01,291 INFO L85 PathProgramCache]: Analyzing trace with hash -971260377, now seen corresponding path program 1 times [2024-11-22 19:03:01,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:03:01,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179949364] [2024-11-22 19:03:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:03:01,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:03:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:03:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 19:03:01,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:03:01,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179949364] [2024-11-22 19:03:01,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179949364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:03:01,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875223373] [2024-11-22 19:03:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:03:01,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:03:01,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:03:01,783 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 19:03:01,784 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 19:03:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:03:01,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-22 19:03:01,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:03:01,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-22 19:03:02,093 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 19:03:02,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 19:03:02,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-22 19:03:02,344 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 10 [2024-11-22 19:03:02,349 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-22 19:03:02,350 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 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:03:02,501 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11| Int)) (<= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_11|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_19|) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#memory_$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|) (= 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 19:03:02,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:03:02,519 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 19:03:02,539 INFO L349 Elim1Store]: treesize reduction 116, result has 32.2 percent of original size [2024-11-22 19:03:02,539 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 5 case distinctions, treesize of input 40 treesize of output 69 [2024-11-22 19:03:02,836 INFO L349 Elim1Store]: treesize reduction 59, result has 37.2 percent of original size [2024-11-22 19:03:02,836 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 84 treesize of output 51 [2024-11-22 19:03:02,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 56 [2024-11-22 19:03:02,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:03:02,945 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 65 treesize of output 53 [2024-11-22 19:03:03,078 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 41 treesize of output 17 [2024-11-22 19:03:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-22 19:03:03,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:03:11,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875223373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:03:11,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:03:11,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 48 [2024-11-22 19:03:11,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621520613] [2024-11-22 19:03:11,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:03:11,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-22 19:03:11,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:03:11,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-22 19:03:11,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3034, Unknown=3, NotChecked=110, Total=3306 [2024-11-22 19:03:11,983 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 49 states, 46 states have (on average 2.130434782608696) internal successors, (98), 43 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:03:14,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:03:14,272 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2024-11-22 19:03:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-22 19:03:14,272 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 2.130434782608696) internal successors, (98), 43 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2024-11-22 19:03:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:03:14,273 INFO L225 Difference]: With dead ends: 120 [2024-11-22 19:03:14,273 INFO L226 Difference]: Without dead ends: 120 [2024-11-22 19:03:14,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=469, Invalid=7188, Unknown=3, NotChecked=172, Total=7832 [2024-11-22 19:03:14,275 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 117 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-22 19:03:14,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1183 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1900 Invalid, 0 Unknown, 101 Unchecked, 0.9s Time] [2024-11-22 19:03:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-22 19:03:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2024-11-22 19:03:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.2365591397849462) internal successors, (115), 106 states have internal predecessors, (115), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 19:03:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2024-11-22 19:03:14,277 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 58 [2024-11-22 19:03:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:03:14,277 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2024-11-22 19:03:14,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 2.130434782608696) internal successors, (98), 43 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-22 19:03:14,277 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2024-11-22 19:03:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-22 19:03:14,278 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:03:14,278 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:03:14,285 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 19:03:14,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 19:03:14,479 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:03:14,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:03:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1710350066, now seen corresponding path program 1 times [2024-11-22 19:03:14,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:03:14,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846242605] [2024-11-22 19:03:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:03:14,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:03:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:03:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 19:03:16,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:03:16,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846242605] [2024-11-22 19:03:16,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846242605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:03:16,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653062397] [2024-11-22 19:03:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:03:16,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:03:16,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:03:16,050 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 19:03:16,050 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 19:03:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:03:16,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-22 19:03:16,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:03:16,559 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 19:03:16,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-22 19:03:16,577 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-22 19:03:16,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-22 19:03:16,691 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 19:03:16,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-22 19:03:16,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 23 [2024-11-22 19:03:16,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2024-11-22 19:03:16,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 19:03:16,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-22 19:03:25,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:03:25,972 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 87 treesize of output 64 [2024-11-22 19:03:26,052 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2024-11-22 19:03:26,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2024-11-22 19:03:26,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2024-11-22 19:03:26,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2024-11-22 19:03:27,462 INFO L349 Elim1Store]: treesize reduction 59, result has 37.2 percent of original size [2024-11-22 19:03:27,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 55 [2024-11-22 19:03:27,504 INFO L349 Elim1Store]: treesize reduction 51, result has 25.0 percent of original size [2024-11-22 19:03:27,504 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 31 treesize of output 30 [2024-11-22 19:03:27,915 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 121 treesize of output 93 [2024-11-22 19:03:27,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:03:27,934 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 111 treesize of output 91 [2024-11-22 19:03:28,611 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 41 treesize of output 17 [2024-11-22 19:03:28,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:03:28,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2024-11-22 19:03:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:03:29,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 19:03:32,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653062397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:03:32,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 19:03:32,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2024-11-22 19:03:32,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916736372] [2024-11-22 19:03:32,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 19:03:32,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-22 19:03:32,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 19:03:32,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-22 19:03:32,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=5315, Unknown=2, NotChecked=0, Total=5550 [2024-11-22 19:03:32,856 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand has 63 states, 60 states have (on average 1.8166666666666667) internal successors, (109), 55 states have internal predecessors, (109), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-22 19:03:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 19:03:44,619 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2024-11-22 19:03:44,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-22 19:03:44,620 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 60 states have (on average 1.8166666666666667) internal successors, (109), 55 states have internal predecessors, (109), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 62 [2024-11-22 19:03:44,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 19:03:44,621 INFO L225 Difference]: With dead ends: 120 [2024-11-22 19:03:44,621 INFO L226 Difference]: Without dead ends: 120 [2024-11-22 19:03:44,623 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=641, Invalid=11567, Unknown=2, NotChecked=0, Total=12210 [2024-11-22 19:03:44,624 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 156 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 2880 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-22 19:03:44,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1430 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2880 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-11-22 19:03:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-22 19:03:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2024-11-22 19:03:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 108 states have internal predecessors, (116), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 19:03:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2024-11-22 19:03:44,627 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 62 [2024-11-22 19:03:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 19:03:44,628 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2024-11-22 19:03:44,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 60 states have (on average 1.8166666666666667) internal successors, (109), 55 states have internal predecessors, (109), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-22 19:03:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2024-11-22 19:03:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-22 19:03:44,628 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 19:03:44,628 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 19:03:44,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 19:03:44,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:03:44,829 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 19:03:44,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 19:03:44,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1481233716, now seen corresponding path program 1 times [2024-11-22 19:03:44,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 19:03:44,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194131077] [2024-11-22 19:03:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:03:44,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 19:03:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:03:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 19:03:47,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 19:03:47,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194131077] [2024-11-22 19:03:47,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194131077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 19:03:47,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977562980] [2024-11-22 19:03:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 19:03:47,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 19:03:47,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 19:03:47,534 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 19:03:47,535 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 19:03:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 19:03:47,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-22 19:03:47,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 19:03:48,368 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 19:03:48,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 19:03:48,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-22 19:03:48,853 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-22 19:03:48,854 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 27 treesize of output 17 [2024-11-22 19:03:49,842 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 19:03:49,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-22 19:03:49,861 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 19:03:50,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-11-22 19:03:50,710 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (let ((.cse0 (select |c_#memory_int#2| |node_create_~temp~0#1.base|))) (and (= |c_node_create_#in~data#1| (select .cse0 0)) (= (store |c_old(#memory_$Pointer$#2.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.offset| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.offset|) (= |c_#memory_int#2| (store |c_old(#memory_int#2)| |node_create_~temp~0#1.base| .cse0)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_8| Int)) (<= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_8|) 0) 0))) is different from true [2024-11-22 19:03:50,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:03:50,786 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 21 [2024-11-22 19:03:50,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:03:50,799 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 30 treesize of output 25 [2024-11-22 19:03:50,832 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-22 19:03:50,832 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 19:03:51,749 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 19:03:51,754 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 35 treesize of output 7 [2024-11-22 19:03:52,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 19:03:52,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2024-11-22 19:03:52,634 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 25 [2024-11-22 19:03:52,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 19:03:52,656 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 39 treesize of output 31 [2024-11-22 19:03:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-22 19:03:53,257 INFO L311 TraceCheckSpWp]: Computing backward predicates...