./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext/tree_of_cslls.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml', '-i', '../sv-benchmarks/c/memsafety-ext/tree_of_cslls.i', '-s', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf', '--cacsl2boogietranslator.entry.function', 'main', '--witnessprinter.witness.directory', '/storage/repos/ultimate-jdk21/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) )\nCHECK( init(main()), LTL(G valid-deref) )\nCHECK( init(main()), LTL(G valid-memtrack) )\n\n', '--witnessprinter.graph.data.producer', 'Automizer', '--witnessprinter.graph.data.architecture', '32bit', '--witnessprinter.graph.data.programhash', 'e174a1790a7df4dcba920aa7097618d66c8703aa13de1aa6af1a2c5f7cb0971c'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-ext/tree_of_cslls.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 e174a1790a7df4dcba920aa7097618d66c8703aa13de1aa6af1a2c5f7cb0971c --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 16:29:24,149 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 16:29:24,232 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 16:29:24,237 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 16:29:24,238 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 16:29:24,263 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 16:29:24,264 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 16:29:24,264 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 16:29:24,264 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 16:29:24,264 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 16:29:24,264 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 16:29:24,265 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 16:29:24,265 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 16:29:24,265 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 16:29:24,265 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 16:29:24,265 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 16:29:24,266 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 16:29:24,267 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 16:29:24,267 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 16:29:24,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 16:29:24,267 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 16:29:24,267 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 16:29:24,267 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 16:29:24,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 16:29:24,267 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 16:29:24,267 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 16:29:24,267 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 16:29:24,267 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 16:29:24,268 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 16:29:24,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 16:29:24,268 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 -> e174a1790a7df4dcba920aa7097618d66c8703aa13de1aa6af1a2c5f7cb0971c [2024-11-07 16:29:24,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 16:29:24,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 16:29:24,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 16:29:24,563 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 16:29:24,564 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 16:29:24,565 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext/tree_of_cslls.i [2024-11-07 16:29:25,813 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 16:29:26,096 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 16:29:26,100 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/memsafety-ext/tree_of_cslls.i [2024-11-07 16:29:26,113 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/dc07ce37d/1e768c0b2a104903864894cbd48fca77/FLAGe55258d27 [2024-11-07 16:29:26,380 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/dc07ce37d/1e768c0b2a104903864894cbd48fca77 [2024-11-07 16:29:26,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 16:29:26,383 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 16:29:26,384 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 16:29:26,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 16:29:26,388 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 16:29:26,389 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,389 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a8aebac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26, skipping insertion in model container [2024-11-07 16:29:26,391 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,421 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 16:29:26,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 16:29:26,646 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 16:29:26,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 16:29:26,732 INFO L204 MainTranslator]: Completed translation [2024-11-07 16:29:26,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26 WrapperNode [2024-11-07 16:29:26,733 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 16:29:26,734 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 16:29:26,734 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 16:29:26,735 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 16:29:26,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,756 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,792 INFO L138 Inliner]: procedures = 123, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 223 [2024-11-07 16:29:26,793 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 16:29:26,794 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 16:29:26,795 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 16:29:26,795 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 16:29:26,802 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,807 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,838 INFO L175 MemorySlicer]: Split 49 memory accesses to 2 slices as follows [2, 47]. 96 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 17 writes are split as follows [0, 17]. [2024-11-07 16:29:26,842 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,843 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,856 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,863 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,865 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,866 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,872 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 16:29:26,874 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 16:29:26,874 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 16:29:26,874 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 16:29:26,875 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (1/1) ... [2024-11-07 16:29:26,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 16:29:26,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 16:29:26,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-07 16:29:26,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-07 16:29:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 16:29:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 16:29:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-07 16:29:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-07 16:29:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-07 16:29:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-07 16:29:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-07 16:29:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 16:29:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 16:29:26,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 16:29:26,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 16:29:27,020 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 16:29:27,021 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 16:29:27,498 INFO L? ?]: Removed 233 outVars from TransFormulas that were not future-live. [2024-11-07 16:29:27,498 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 16:29:27,515 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 16:29:27,517 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-07 16:29:27,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:29:27 BoogieIcfgContainer [2024-11-07 16:29:27,517 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 16:29:27,519 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 16:29:27,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 16:29:27,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 16:29:27,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:29:26" (1/3) ... [2024-11-07 16:29:27,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfe3425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:29:27, skipping insertion in model container [2024-11-07 16:29:27,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:29:26" (2/3) ... [2024-11-07 16:29:27,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfe3425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:29:27, skipping insertion in model container [2024-11-07 16:29:27,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:29:27" (3/3) ... [2024-11-07 16:29:27,526 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_of_cslls.i [2024-11-07 16:29:27,539 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 16:29:27,539 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 104 error locations. [2024-11-07 16:29:27,582 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 16:29:27,593 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;@4b987201, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 16:29:27,593 INFO L334 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2024-11-07 16:29:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 106 states have (on average 2.207547169811321) internal successors, (234), 210 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-07 16:29:27,602 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:27,602 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-07 16:29:27,603 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:27,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2024-11-07 16:29:27,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:27,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136039565] [2024-11-07 16:29:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:27,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:27,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:27,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136039565] [2024-11-07 16:29:27,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136039565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:27,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:27,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 16:29:27,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976297184] [2024-11-07 16:29:27,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:27,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 16:29:27,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:27,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 16:29:27,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 16:29:27,828 INFO L87 Difference]: Start difference. First operand has 211 states, 106 states have (on average 2.207547169811321) internal successors, (234), 210 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:28,152 INFO L93 Difference]: Finished difference Result 278 states and 301 transitions. [2024-11-07 16:29:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 16:29:28,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-07 16:29:28,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:28,164 INFO L225 Difference]: With dead ends: 278 [2024-11-07 16:29:28,164 INFO L226 Difference]: Without dead ends: 276 [2024-11-07 16:29:28,166 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 [2024-11-07 16:29:28,169 INFO L432 NwaCegarLoop]: 154 mSDtfsCounter, 187 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:28,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 202 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-07 16:29:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-07 16:29:28,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 200. [2024-11-07 16:29:28,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 105 states have (on average 2.057142857142857) internal successors, (216), 199 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 216 transitions. [2024-11-07 16:29:28,218 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 216 transitions. Word has length 3 [2024-11-07 16:29:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:28,219 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 216 transitions. [2024-11-07 16:29:28,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 216 transitions. [2024-11-07 16:29:28,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-07 16:29:28,220 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:28,220 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-07 16:29:28,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 16:29:28,221 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:28,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:28,222 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2024-11-07 16:29:28,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:28,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042981522] [2024-11-07 16:29:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:28,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:28,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:28,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042981522] [2024-11-07 16:29:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042981522] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:28,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:28,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 16:29:28,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196770001] [2024-11-07 16:29:28,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:28,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 16:29:28,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:28,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 16:29:28,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 16:29:28,336 INFO L87 Difference]: Start difference. First operand 200 states and 216 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:28,498 INFO L93 Difference]: Finished difference Result 198 states and 214 transitions. [2024-11-07 16:29:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 16:29:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-07 16:29:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:28,499 INFO L225 Difference]: With dead ends: 198 [2024-11-07 16:29:28,499 INFO L226 Difference]: Without dead ends: 198 [2024-11-07 16:29:28,500 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 [2024-11-07 16:29:28,500 INFO L432 NwaCegarLoop]: 211 mSDtfsCounter, 2 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:28,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 321 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-07 16:29:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-07 16:29:28,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2024-11-07 16:29:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 105 states have (on average 2.038095238095238) internal successors, (214), 197 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 214 transitions. [2024-11-07 16:29:28,516 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 214 transitions. Word has length 3 [2024-11-07 16:29:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:28,517 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 214 transitions. [2024-11-07 16:29:28,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 214 transitions. [2024-11-07 16:29:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-07 16:29:28,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:28,517 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-07 16:29:28,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 16:29:28,517 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:28,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:28,518 INFO L85 PathProgramCache]: Analyzing trace with hash 889446153, now seen corresponding path program 1 times [2024-11-07 16:29:28,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:28,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224638124] [2024-11-07 16:29:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:28,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:28,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:28,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224638124] [2024-11-07 16:29:28,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224638124] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:28,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:28,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 16:29:28,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905783528] [2024-11-07 16:29:28,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:28,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 16:29:28,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:28,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 16:29:28,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-07 16:29:28,724 INFO L87 Difference]: Start difference. First operand 198 states and 214 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:29,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:29,097 INFO L93 Difference]: Finished difference Result 349 states and 379 transitions. [2024-11-07 16:29:29,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 16:29:29,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-07 16:29:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:29,101 INFO L225 Difference]: With dead ends: 349 [2024-11-07 16:29:29,101 INFO L226 Difference]: Without dead ends: 349 [2024-11-07 16:29:29,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-07 16:29:29,102 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 274 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:29,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 233 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-07 16:29:29,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-11-07 16:29:29,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 191. [2024-11-07 16:29:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 190 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:29,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 207 transitions. [2024-11-07 16:29:29,111 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 207 transitions. Word has length 6 [2024-11-07 16:29:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:29,111 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 207 transitions. [2024-11-07 16:29:29,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 207 transitions. [2024-11-07 16:29:29,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-07 16:29:29,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:29,113 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:29,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 16:29:29,114 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:29,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:29,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1113924364, now seen corresponding path program 1 times [2024-11-07 16:29:29,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:29,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031497547] [2024-11-07 16:29:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:29,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:29,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:29,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031497547] [2024-11-07 16:29:29,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031497547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:29,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:29,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 16:29:29,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065871304] [2024-11-07 16:29:29,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:29,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 16:29:29,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:29,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 16:29:29,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 16:29:29,261 INFO L87 Difference]: Start difference. First operand 191 states and 207 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:29,504 INFO L93 Difference]: Finished difference Result 190 states and 206 transitions. [2024-11-07 16:29:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 16:29:29,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-07 16:29:29,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:29,505 INFO L225 Difference]: With dead ends: 190 [2024-11-07 16:29:29,505 INFO L226 Difference]: Without dead ends: 190 [2024-11-07 16:29:29,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-07 16:29:29,506 INFO L432 NwaCegarLoop]: 201 mSDtfsCounter, 3 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:29,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 512 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-07 16:29:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-07 16:29:29,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2024-11-07 16:29:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 189 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 206 transitions. [2024-11-07 16:29:29,512 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 206 transitions. Word has length 10 [2024-11-07 16:29:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:29,512 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 206 transitions. [2024-11-07 16:29:29,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 206 transitions. [2024-11-07 16:29:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-07 16:29:29,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:29,515 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:29,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 16:29:29,515 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:29,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1113924365, now seen corresponding path program 1 times [2024-11-07 16:29:29,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:29,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207559569] [2024-11-07 16:29:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:29,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:29,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:29,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207559569] [2024-11-07 16:29:29,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207559569] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:29,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:29,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 16:29:29,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755905516] [2024-11-07 16:29:29,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:29,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 16:29:29,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:29,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 16:29:29,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 16:29:29,718 INFO L87 Difference]: Start difference. First operand 190 states and 206 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:29,951 INFO L93 Difference]: Finished difference Result 189 states and 205 transitions. [2024-11-07 16:29:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 16:29:29,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-07 16:29:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:29,953 INFO L225 Difference]: With dead ends: 189 [2024-11-07 16:29:29,953 INFO L226 Difference]: Without dead ends: 189 [2024-11-07 16:29:29,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-07 16:29:29,955 INFO L432 NwaCegarLoop]: 201 mSDtfsCounter, 2 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:29,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 533 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-07 16:29:29,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-07 16:29:29,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2024-11-07 16:29:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 105 states have (on average 1.9523809523809523) internal successors, (205), 188 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 205 transitions. [2024-11-07 16:29:29,966 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 205 transitions. Word has length 10 [2024-11-07 16:29:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:29,967 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 205 transitions. [2024-11-07 16:29:29,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:29,967 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 205 transitions. [2024-11-07 16:29:29,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-07 16:29:29,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:29,968 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:29,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 16:29:29,969 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:29,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:29,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1114596085, now seen corresponding path program 1 times [2024-11-07 16:29:29,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:29,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125379740] [2024-11-07 16:29:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:29,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:30,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:30,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125379740] [2024-11-07 16:29:30,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125379740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:30,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:30,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-07 16:29:30,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758197480] [2024-11-07 16:29:30,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:30,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 16:29:30,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:30,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 16:29:30,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-07 16:29:30,316 INFO L87 Difference]: Start difference. First operand 189 states and 205 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:30,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:30,821 INFO L93 Difference]: Finished difference Result 348 states and 386 transitions. [2024-11-07 16:29:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 16:29:30,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-07 16:29:30,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:30,823 INFO L225 Difference]: With dead ends: 348 [2024-11-07 16:29:30,823 INFO L226 Difference]: Without dead ends: 348 [2024-11-07 16:29:30,823 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-07 16:29:30,824 INFO L432 NwaCegarLoop]: 150 mSDtfsCounter, 367 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:30,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 737 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-07 16:29:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-11-07 16:29:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 193. [2024-11-07 16:29:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 109 states have (on average 1.9357798165137614) internal successors, (211), 192 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 211 transitions. [2024-11-07 16:29:30,834 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 211 transitions. Word has length 15 [2024-11-07 16:29:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:30,834 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 211 transitions. [2024-11-07 16:29:30,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 211 transitions. [2024-11-07 16:29:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-07 16:29:30,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:30,835 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:30,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 16:29:30,835 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:30,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:30,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1114596086, now seen corresponding path program 1 times [2024-11-07 16:29:30,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:30,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412911197] [2024-11-07 16:29:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:30,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:31,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:31,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412911197] [2024-11-07 16:29:31,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412911197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:31,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:31,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-07 16:29:31,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747101434] [2024-11-07 16:29:31,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:31,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 16:29:31,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:31,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 16:29:31,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-07 16:29:31,234 INFO L87 Difference]: Start difference. First operand 193 states and 211 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:31,787 INFO L93 Difference]: Finished difference Result 341 states and 379 transitions. [2024-11-07 16:29:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 16:29:31,787 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-07 16:29:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:31,789 INFO L225 Difference]: With dead ends: 341 [2024-11-07 16:29:31,789 INFO L226 Difference]: Without dead ends: 341 [2024-11-07 16:29:31,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-07 16:29:31,789 INFO L432 NwaCegarLoop]: 136 mSDtfsCounter, 437 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:31,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 497 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-07 16:29:31,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2024-11-07 16:29:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 193. [2024-11-07 16:29:31,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 109 states have (on average 1.926605504587156) internal successors, (210), 192 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:31,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 210 transitions. [2024-11-07 16:29:31,794 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 210 transitions. Word has length 15 [2024-11-07 16:29:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:31,795 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 210 transitions. [2024-11-07 16:29:31,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 210 transitions. [2024-11-07 16:29:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-07 16:29:31,795 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:31,795 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:31,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 16:29:31,796 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:31,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:31,796 INFO L85 PathProgramCache]: Analyzing trace with hash 192740277, now seen corresponding path program 1 times [2024-11-07 16:29:31,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:31,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45288844] [2024-11-07 16:29:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:31,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:31,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:31,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45288844] [2024-11-07 16:29:31,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45288844] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:31,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:31,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 16:29:31,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455931438] [2024-11-07 16:29:31,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:31,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 16:29:31,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:31,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 16:29:31,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 16:29:31,866 INFO L87 Difference]: Start difference. First operand 193 states and 210 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:31,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:31,980 INFO L93 Difference]: Finished difference Result 190 states and 207 transitions. [2024-11-07 16:29:31,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 16:29:31,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-07 16:29:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:31,981 INFO L225 Difference]: With dead ends: 190 [2024-11-07 16:29:31,981 INFO L226 Difference]: Without dead ends: 190 [2024-11-07 16:29:31,981 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 [2024-11-07 16:29:31,982 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 23 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:31,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 271 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-07 16:29:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-07 16:29:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2024-11-07 16:29:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 109 states have (on average 1.8990825688073394) internal successors, (207), 189 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 207 transitions. [2024-11-07 16:29:31,986 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 207 transitions. Word has length 16 [2024-11-07 16:29:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:31,987 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 207 transitions. [2024-11-07 16:29:31,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 207 transitions. [2024-11-07 16:29:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-07 16:29:31,988 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:31,988 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:31,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 16:29:31,988 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:31,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:31,989 INFO L85 PathProgramCache]: Analyzing trace with hash 192740278, now seen corresponding path program 1 times [2024-11-07 16:29:31,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:31,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810306836] [2024-11-07 16:29:31,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:31,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:32,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:32,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810306836] [2024-11-07 16:29:32,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810306836] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:32,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:32,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 16:29:32,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473276642] [2024-11-07 16:29:32,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:32,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 16:29:32,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:32,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 16:29:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 16:29:32,056 INFO L87 Difference]: Start difference. First operand 190 states and 207 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:32,168 INFO L93 Difference]: Finished difference Result 188 states and 205 transitions. [2024-11-07 16:29:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 16:29:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-07 16:29:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:32,173 INFO L225 Difference]: With dead ends: 188 [2024-11-07 16:29:32,173 INFO L226 Difference]: Without dead ends: 188 [2024-11-07 16:29:32,173 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 [2024-11-07 16:29:32,174 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 16 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:32,174 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 283 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-07 16:29:32,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-07 16:29:32,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2024-11-07 16:29:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 109 states have (on average 1.8807339449541285) internal successors, (205), 187 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 205 transitions. [2024-11-07 16:29:32,180 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 205 transitions. Word has length 16 [2024-11-07 16:29:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:32,180 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 205 transitions. [2024-11-07 16:29:32,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 205 transitions. [2024-11-07 16:29:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-07 16:29:32,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:32,180 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:32,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 16:29:32,180 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:32,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:32,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1678809590, now seen corresponding path program 1 times [2024-11-07 16:29:32,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:32,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830906332] [2024-11-07 16:29:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:32,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:32,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:32,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830906332] [2024-11-07 16:29:32,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830906332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:32,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:32,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 16:29:32,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911957237] [2024-11-07 16:29:32,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:32,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 16:29:32,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:32,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 16:29:32,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 16:29:32,238 INFO L87 Difference]: Start difference. First operand 188 states and 205 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:32,508 INFO L93 Difference]: Finished difference Result 248 states and 276 transitions. [2024-11-07 16:29:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 16:29:32,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-07 16:29:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:32,509 INFO L225 Difference]: With dead ends: 248 [2024-11-07 16:29:32,510 INFO L226 Difference]: Without dead ends: 248 [2024-11-07 16:29:32,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-07 16:29:32,510 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 261 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:32,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 170 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-07 16:29:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-07 16:29:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 177. [2024-11-07 16:29:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 113 states have (on average 1.752212389380531) internal successors, (198), 176 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2024-11-07 16:29:32,516 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 17 [2024-11-07 16:29:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:32,516 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2024-11-07 16:29:32,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2024-11-07 16:29:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-07 16:29:32,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:32,517 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:32,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 16:29:32,517 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:32,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:32,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1678809591, now seen corresponding path program 1 times [2024-11-07 16:29:32,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:32,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223239090] [2024-11-07 16:29:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:32,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:32,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:32,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223239090] [2024-11-07 16:29:32,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223239090] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:32,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:32,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 16:29:32,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357819171] [2024-11-07 16:29:32,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:32,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 16:29:32,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:32,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 16:29:32,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 16:29:32,624 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:32,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:32,981 INFO L93 Difference]: Finished difference Result 410 states and 467 transitions. [2024-11-07 16:29:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 16:29:32,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-07 16:29:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:32,983 INFO L225 Difference]: With dead ends: 410 [2024-11-07 16:29:32,984 INFO L226 Difference]: Without dead ends: 410 [2024-11-07 16:29:32,984 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-07 16:29:32,985 INFO L432 NwaCegarLoop]: 134 mSDtfsCounter, 648 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:32,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 312 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-07 16:29:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2024-11-07 16:29:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 320. [2024-11-07 16:29:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 256 states have (on average 1.75390625) internal successors, (449), 319 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 449 transitions. [2024-11-07 16:29:32,995 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 449 transitions. Word has length 17 [2024-11-07 16:29:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:32,997 INFO L471 AbstractCegarLoop]: Abstraction has 320 states and 449 transitions. [2024-11-07 16:29:32,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 449 transitions. [2024-11-07 16:29:32,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-07 16:29:32,998 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:32,998 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:32,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-07 16:29:32,998 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:32,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:32,999 INFO L85 PathProgramCache]: Analyzing trace with hash -445669701, now seen corresponding path program 1 times [2024-11-07 16:29:32,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:32,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420048595] [2024-11-07 16:29:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:32,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:33,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:33,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420048595] [2024-11-07 16:29:33,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420048595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:33,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:33,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-07 16:29:33,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477733481] [2024-11-07 16:29:33,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:33,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 16:29:33,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:33,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 16:29:33,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-07 16:29:33,126 INFO L87 Difference]: Start difference. First operand 320 states and 449 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:33,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:33,485 INFO L93 Difference]: Finished difference Result 451 states and 647 transitions. [2024-11-07 16:29:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 16:29:33,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-07 16:29:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:33,488 INFO L225 Difference]: With dead ends: 451 [2024-11-07 16:29:33,488 INFO L226 Difference]: Without dead ends: 451 [2024-11-07 16:29:33,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-07 16:29:33,489 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 170 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:33,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 664 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-07 16:29:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-11-07 16:29:33,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 319. [2024-11-07 16:29:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 256 states have (on average 1.75) internal successors, (448), 318 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:33,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 448 transitions. [2024-11-07 16:29:33,497 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 448 transitions. Word has length 19 [2024-11-07 16:29:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:33,498 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 448 transitions. [2024-11-07 16:29:33,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 448 transitions. [2024-11-07 16:29:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-07 16:29:33,498 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:33,498 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:33,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-07 16:29:33,498 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:33,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:33,499 INFO L85 PathProgramCache]: Analyzing trace with hash -445669700, now seen corresponding path program 1 times [2024-11-07 16:29:33,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:33,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109997990] [2024-11-07 16:29:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:33,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:33,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:33,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109997990] [2024-11-07 16:29:33,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109997990] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:33,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:33,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-07 16:29:33,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615958972] [2024-11-07 16:29:33,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:33,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-07 16:29:33,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:33,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-07 16:29:33,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-07 16:29:33,859 INFO L87 Difference]: Start difference. First operand 319 states and 448 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:34,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:34,476 INFO L93 Difference]: Finished difference Result 598 states and 839 transitions. [2024-11-07 16:29:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-07 16:29:34,476 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-07 16:29:34,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:34,479 INFO L225 Difference]: With dead ends: 598 [2024-11-07 16:29:34,479 INFO L226 Difference]: Without dead ends: 598 [2024-11-07 16:29:34,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-11-07 16:29:34,479 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 347 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:34,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 886 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-07 16:29:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2024-11-07 16:29:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 323. [2024-11-07 16:29:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 260 states have (on average 1.7384615384615385) internal successors, (452), 322 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 452 transitions. [2024-11-07 16:29:34,488 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 452 transitions. Word has length 19 [2024-11-07 16:29:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:34,488 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 452 transitions. [2024-11-07 16:29:34,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 452 transitions. [2024-11-07 16:29:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-07 16:29:34,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:34,489 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:34,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-07 16:29:34,489 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:34,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:34,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1571608545, now seen corresponding path program 1 times [2024-11-07 16:29:34,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:34,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144402200] [2024-11-07 16:29:34,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:34,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:34,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:34,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144402200] [2024-11-07 16:29:34,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144402200] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:34,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:34,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 16:29:34,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409740704] [2024-11-07 16:29:34,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:34,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 16:29:34,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 16:29:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 16:29:34,525 INFO L87 Difference]: Start difference. First operand 323 states and 452 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:34,544 INFO L93 Difference]: Finished difference Result 397 states and 530 transitions. [2024-11-07 16:29:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 16:29:34,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-07 16:29:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:34,546 INFO L225 Difference]: With dead ends: 397 [2024-11-07 16:29:34,546 INFO L226 Difference]: Without dead ends: 397 [2024-11-07 16:29:34,546 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 [2024-11-07 16:29:34,547 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 164 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:34,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 297 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-07 16:29:34,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-11-07 16:29:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 363. [2024-11-07 16:29:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 300 states have (on average 1.7666666666666666) internal successors, (530), 362 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 530 transitions. [2024-11-07 16:29:34,556 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 530 transitions. Word has length 19 [2024-11-07 16:29:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:34,556 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 530 transitions. [2024-11-07 16:29:34,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 530 transitions. [2024-11-07 16:29:34,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-07 16:29:34,557 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:34,557 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:34,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-07 16:29:34,558 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:34,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:34,559 INFO L85 PathProgramCache]: Analyzing trace with hash 189775598, now seen corresponding path program 1 times [2024-11-07 16:29:34,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:34,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340148220] [2024-11-07 16:29:34,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:34,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:34,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:34,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340148220] [2024-11-07 16:29:34,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340148220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 16:29:34,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 16:29:34,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 16:29:34,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246619463] [2024-11-07 16:29:34,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 16:29:34,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 16:29:34,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:34,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 16:29:34,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 16:29:34,614 INFO L87 Difference]: Start difference. First operand 363 states and 530 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:34,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:34,624 INFO L93 Difference]: Finished difference Result 367 states and 534 transitions. [2024-11-07 16:29:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 16:29:34,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-07 16:29:34,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:34,626 INFO L225 Difference]: With dead ends: 367 [2024-11-07 16:29:34,626 INFO L226 Difference]: Without dead ends: 367 [2024-11-07 16:29:34,626 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 [2024-11-07 16:29:34,627 INFO L432 NwaCegarLoop]: 183 mSDtfsCounter, 0 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:34,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 360 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-07 16:29:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-11-07 16:29:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2024-11-07 16:29:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 304 states have (on average 1.756578947368421) internal successors, (534), 366 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 534 transitions. [2024-11-07 16:29:34,637 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 534 transitions. Word has length 23 [2024-11-07 16:29:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:34,638 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 534 transitions. [2024-11-07 16:29:34,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 534 transitions. [2024-11-07 16:29:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-07 16:29:34,640 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:34,640 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:34,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-07 16:29:34,641 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:34,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:34,641 INFO L85 PathProgramCache]: Analyzing trace with hash 97933121, now seen corresponding path program 1 times [2024-11-07 16:29:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:34,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842404830] [2024-11-07 16:29:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:34,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:35,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:35,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842404830] [2024-11-07 16:29:35,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842404830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 16:29:35,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705741833] [2024-11-07 16:29:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:35,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 16:29:35,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 16:29:35,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 16:29:35,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-07 16:29:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:35,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-07 16:29:35,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 16:29:35,165 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 [2024-11-07 16:29:35,188 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 16:29:35,188 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 [2024-11-07 16:29:35,202 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 [2024-11-07 16:29:35,260 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2024-11-07 16:29:35,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2024-11-07 16:29:35,285 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 16:29:35,285 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 [2024-11-07 16:29:35,314 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 23 [2024-11-07 16:29:35,365 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2024-11-07 16:29:35,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2024-11-07 16:29:35,396 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2024-11-07 16:29:35,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2024-11-07 16:29:35,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2024-11-07 16:29:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:35,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 16:29:35,482 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_461 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem11#1.base| v_ArrVal_461) |c_ULTIMATE.start_main_~tree~0#1.base|) (+ |c_ULTIMATE.start_main_~tree~0#1.offset| 8))) 1)) is different from false [2024-11-07 16:29:35,489 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_461 (Array Int Int))) (= (select |c_#valid| (let ((.cse0 (+ |c_ULTIMATE.start_main_~tree~0#1.offset| 8))) (select (select (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~tree~0#1.base|) .cse0) v_ArrVal_461) |c_ULTIMATE.start_main_~tree~0#1.base|) .cse0))) 1)) is different from false [2024-11-07 16:29:35,503 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_461 (Array Int Int)) (v_ArrVal_460 (Array Int Int))) (= (select |c_#valid| (let ((.cse1 (+ |c_ULTIMATE.start_main_~tree~0#1.offset| 8))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~tmpList~0#1.base| v_ArrVal_460))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~tree~0#1.base|) .cse1) v_ArrVal_461)) |c_ULTIMATE.start_main_~tree~0#1.base|) .cse1))) 1)) is different from false [2024-11-07 16:29:35,520 INFO L349 Elim1Store]: treesize reduction 5, result has 82.8 percent of original size [2024-11-07 16:29:35,520 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 33 treesize of output 32 [2024-11-07 16:29:35,527 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_461 (Array Int Int)) (v_ArrVal_460 (Array Int Int))) (= |c_ULTIMATE.start_main_#t~mem9#1.base| (let ((.cse1 (+ |c_ULTIMATE.start_main_~tree~0#1.offset| 8))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~tmpList~0#1.base| v_ArrVal_460))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~tree~0#1.base|) .cse1) v_ArrVal_461)) |c_ULTIMATE.start_main_~tree~0#1.base|) .cse1)))) is different from false [2024-11-07 16:29:35,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 16:29:35,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 50 [2024-11-07 16:29:35,729 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-07 16:29:35,731 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 338 treesize of output 260 [2024-11-07 16:29:35,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-07 16:29:35,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-07 16:29:35,749 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 16:29:35,749 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 13 treesize of output 12 [2024-11-07 16:29:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2024-11-07 16:29:35,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705741833] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 16:29:35,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 16:29:35,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13] total 23 [2024-11-07 16:29:35,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866830602] [2024-11-07 16:29:35,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 16:29:35,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-07 16:29:35,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 16:29:35,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-07 16:29:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=308, Unknown=13, NotChecked=156, Total=552 [2024-11-07 16:29:35,783 INFO L87 Difference]: Start difference. First operand 367 states and 534 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-07 16:29:36,862 INFO L93 Difference]: Finished difference Result 602 states and 867 transitions. [2024-11-07 16:29:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 16:29:36,863 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-07 16:29:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-07 16:29:36,865 INFO L225 Difference]: With dead ends: 602 [2024-11-07 16:29:36,865 INFO L226 Difference]: Without dead ends: 602 [2024-11-07 16:29:36,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=469, Unknown=13, NotChecked=196, Total=812 [2024-11-07 16:29:36,866 INFO L432 NwaCegarLoop]: 143 mSDtfsCounter, 532 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1129 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-07 16:29:36,867 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1972 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1351 Invalid, 0 Unknown, 1129 Unchecked, 0.9s Time] [2024-11-07 16:29:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2024-11-07 16:29:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 366. [2024-11-07 16:29:36,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 304 states have (on average 1.7532894736842106) internal successors, (533), 365 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 533 transitions. [2024-11-07 16:29:36,876 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 533 transitions. Word has length 24 [2024-11-07 16:29:36,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-07 16:29:36,876 INFO L471 AbstractCegarLoop]: Abstraction has 366 states and 533 transitions. [2024-11-07 16:29:36,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 16:29:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 533 transitions. [2024-11-07 16:29:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-07 16:29:36,878 INFO L207 NwaCegarLoop]: Found error trace [2024-11-07 16:29:36,879 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 16:29:36,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-07 16:29:37,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-07 16:29:37,083 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2024-11-07 16:29:37,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 16:29:37,084 INFO L85 PathProgramCache]: Analyzing trace with hash 97933122, now seen corresponding path program 1 times [2024-11-07 16:29:37,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 16:29:37,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877968526] [2024-11-07 16:29:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:37,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 16:29:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:37,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 16:29:37,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877968526] [2024-11-07 16:29:37,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877968526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 16:29:37,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718838236] [2024-11-07 16:29:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 16:29:37,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 16:29:37,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 16:29:37,663 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 16:29:37,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-07 16:29:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 16:29:37,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-07 16:29:37,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 16:29:37,793 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 [2024-11-07 16:29:37,825 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 [2024-11-07 16:29:37,839 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 16:29:37,839 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 [2024-11-07 16:29:37,872 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 [2024-11-07 16:29:37,885 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 [2024-11-07 16:29:38,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 16:29:38,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 46 [2024-11-07 16:29:38,041 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 13 [2024-11-07 16:29:38,122 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2024-11-07 16:29:38,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2024-11-07 16:29:38,150 INFO L349 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2024-11-07 16:29:38,150 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 22 treesize of output 24 [2024-11-07 16:29:38,333 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 40 [2024-11-07 16:29:38,343 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 18 treesize of output 13 [2024-11-07 16:29:38,520 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2024-11-07 16:29:38,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 85 [2024-11-07 16:29:38,537 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 43 treesize of output 13 [2024-11-07 16:29:38,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 16:29:38,628 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 16:29:38,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2024-11-07 16:29:38,642 INFO L349 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2024-11-07 16:29:38,642 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 1 case distinctions, treesize of input 17 treesize of output 17 [2024-11-07 16:29:38,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2024-11-07 16:29:38,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-07 16:29:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 16:29:38,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 16:29:39,119 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_main_~tree~0#1.offset| 8))) (and (or (forall ((|v_ULTIMATE.start_main_~tmpList~0#1.base_26| Int)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~tmpList~0#1.base_26|) 0))) (forall ((v_ArrVal_559 (Array Int Int)) (v_ArrVal_558 (Array Int Int)) (v_ArrVal_562 Int)) (< 0 (+ (select (select (let ((.cse1 (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~tmpList~0#1.base| v_ArrVal_559) |c_ULTIMATE.start_main_~tree~0#1.base|) .cse2)) (.cse0 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~tmpList~0#1.base| v_ArrVal_558))) (store .cse0 .cse1 (store (select .cse0 .cse1) (select (select .cse0 |c_ULTIMATE.start_main_~tree~0#1.base|) .cse2) v_ArrVal_562))) |c_ULTIMATE.start_main_~tree~0#1.base|) .cse2) 1)))) (forall ((v_ArrVal_559 (Array Int Int)) (v_ArrVal_558 (Array Int Int)) (v_ArrVal_562 Int) (v_ArrVal_561 (Array Int Int)) (|v_ULTIMATE.start_main_~tmpList~0#1.base_26| Int)) (or (forall ((v_ArrVal_563 Int)) (let ((.cse5 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~tmpList~0#1.base| v_ArrVal_559))) (let ((.cse4 (select (select .cse5 |c_ULTIMATE.start_main_~tree~0#1.base|) .cse2))) (<= (+ (select (select (let ((.cse3 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~tmpList~0#1.base| v_ArrVal_558))) (store .cse3 .cse4 (store (select .cse3 .cse4) (select (select .cse3 |c_ULTIMATE.start_main_~tree~0#1.base|) .cse2) v_ArrVal_562))) |c_ULTIMATE.start_main_~tree~0#1.base|) .cse2) 4) (select (store |c_#length| |v_ULTIMATE.start_main_~tmpList~0#1.base_26| v_ArrVal_563) (select (select (store .cse5 .cse4 v_ArrVal_561) |c_ULTIMATE.start_main_~tree~0#1.base|) .cse2)))))) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~tmpList~0#1.base_26|) 0)))))) is different from false [2024-11-07 16:29:39,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 16:29:39,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 170 [2024-11-07 16:29:40,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 16:29:40,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 481 treesize of output 412 [2024-11-07 16:29:40,484 INFO L349 Elim1Store]: treesize reduction 38, result has 61.6 percent of original size [2024-11-07 16:29:40,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 391 treesize of output 298 [2024-11-07 16:29:40,577 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 16:29:40,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41815 treesize of output 39837 [2024-11-07 16:29:40,903 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 153980 treesize of output 153608 [2024-11-07 16:29:41,256 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 2178 treesize of output 2114 [2024-11-07 16:29:41,305 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 2226 treesize of output 2170 [2024-11-07 16:29:41,359 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 2386 treesize of output 2266 [2024-11-07 16:29:41,424 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 2477 treesize of output 2309 [2024-11-07 16:29:41,581 INFO L349 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2024-11-07 16:29:41,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2135 treesize of output 2167 [2024-11-07 16:29:41,754 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 2262 treesize of output 2150 [2024-11-07 16:29:41,816 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 2214 treesize of output 2150 [2024-11-07 16:29:41,874 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 2307 treesize of output 2175