./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_palindrome_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml', '-i', '../sv-benchmarks/c/array-examples/standard_palindrome_ground.i', '-s', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) )\n\n', '--witnessprinter.graph.data.producer', 'Automizer', '--witnessprinter.graph.data.architecture', '32bit', '--witnessprinter.graph.data.programhash', '270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6'] 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/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_palindrome_ground.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-06 18:12:55,624 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-06 18:12:55,725 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-06 18:12:55,732 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-06 18:12:55,732 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-06 18:12:55,763 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-06 18:12:55,764 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-06 18:12:55,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-06 18:12:55,764 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-06 18:12:55,764 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-06 18:12:55,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-06 18:12:55,764 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-06 18:12:55,765 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-06 18:12:55,765 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-06 18:12:55,765 INFO L153 SettingsManager]: * Use SBE=true [2024-11-06 18:12:55,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-06 18:12:55,765 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-06 18:12:55,766 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-06 18:12:55,767 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-06 18:12:55,767 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-06 18:12:55,767 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-06 18:12:55,767 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-06 18:12:55,768 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-06 18:12:55,768 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-06 18:12:55,768 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-06 18:12:55,768 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-06 18:12:55,768 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-06 18:12:55,768 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-06 18:12:55,769 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-06 18:12:55,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-06 18:12:55,769 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-06 18:12:55,769 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-06 18:12:55,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 18:12:55,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-06 18:12:55,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-06 18:12:55,770 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-06 18:12:55,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-06 18:12:55,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-06 18:12:55,770 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-06 18:12:55,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-06 18:12:55,771 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-06 18:12:55,771 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-06 18:12:55,771 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 ! call(reach_error())) ) 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 -> 270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6 [2024-11-06 18:12:56,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-06 18:12:56,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-06 18:12:56,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-06 18:12:56,073 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-06 18:12:56,073 INFO L274 PluginConnector]: CDTParser initialized [2024-11-06 18:12:56,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_palindrome_ground.i [2024-11-06 18:12:57,484 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-06 18:12:57,749 INFO L384 CDTParser]: Found 1 translation units. [2024-11-06 18:12:57,749 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_palindrome_ground.i [2024-11-06 18:12:57,760 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/48bf93d51/1dad06dfa4104823ac9fcbea54856f90/FLAG74a94bd3a [2024-11-06 18:12:58,061 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/48bf93d51/1dad06dfa4104823ac9fcbea54856f90 [2024-11-06 18:12:58,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-06 18:12:58,065 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-06 18:12:58,066 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-06 18:12:58,067 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-06 18:12:58,070 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-06 18:12:58,071 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,072 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@86a6287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58, skipping insertion in model container [2024-11-06 18:12:58,072 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,084 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 18:12:58,203 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_palindrome_ground.i[819,832] [2024-11-06 18:12:58,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 18:12:58,221 INFO L200 MainTranslator]: Completed pre-run [2024-11-06 18:12:58,229 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_palindrome_ground.i[819,832] [2024-11-06 18:12:58,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 18:12:58,247 INFO L204 MainTranslator]: Completed translation [2024-11-06 18:12:58,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58 WrapperNode [2024-11-06 18:12:58,249 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-06 18:12:58,250 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-06 18:12:58,250 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-06 18:12:58,250 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-06 18:12:58,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,262 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,278 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2024-11-06 18:12:58,279 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-06 18:12:58,280 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-06 18:12:58,280 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-06 18:12:58,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-06 18:12:58,287 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,294 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,310 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-06 18:12:58,313 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,314 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,321 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,326 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,327 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,328 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,332 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-06 18:12:58,334 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-06 18:12:58,335 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-06 18:12:58,335 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-06 18:12:58,336 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (1/1) ... [2024-11-06 18:12:58,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 18:12:58,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 18:12:58,367 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) [2024-11-06 18:12:58,371 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 [2024-11-06 18:12:58,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-06 18:12:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-06 18:12:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-06 18:12:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-06 18:12:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-06 18:12:58,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-06 18:12:58,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-06 18:12:58,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-06 18:12:58,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-06 18:12:58,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-06 18:12:58,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-06 18:12:58,473 INFO L238 CfgBuilder]: Building ICFG [2024-11-06 18:12:58,474 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-06 18:12:58,576 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-06 18:12:58,576 INFO L287 CfgBuilder]: Performing block encoding [2024-11-06 18:12:58,585 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-06 18:12:58,585 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-06 18:12:58,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:12:58 BoogieIcfgContainer [2024-11-06 18:12:58,585 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-06 18:12:58,588 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-06 18:12:58,588 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-06 18:12:58,593 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-06 18:12:58,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:12:58" (1/3) ... [2024-11-06 18:12:58,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67708efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:12:58, skipping insertion in model container [2024-11-06 18:12:58,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:12:58" (2/3) ... [2024-11-06 18:12:58,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67708efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:12:58, skipping insertion in model container [2024-11-06 18:12:58,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:12:58" (3/3) ... [2024-11-06 18:12:58,596 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_palindrome_ground.i [2024-11-06 18:12:58,610 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-06 18:12:58,611 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-06 18:12:58,670 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-06 18:12:58,682 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=LoopHeads, 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;@652c7481, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-06 18:12:58,683 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-06 18:12:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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) [2024-11-06 18:12:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-06 18:12:58,694 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 18:12:58,694 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 18:12:58,695 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 18:12:58,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 18:12:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2024-11-06 18:12:58,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 18:12:58,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147434624] [2024-11-06 18:12:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 18:12:58,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 18:12:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 18:12:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 18:12:58,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 18:12:58,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147434624] [2024-11-06 18:12:58,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147434624] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 18:12:58,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 18:12:58,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-06 18:12:58,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693370981] [2024-11-06 18:12:58,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 18:12:58,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-06 18:12:58,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 18:12:58,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-06 18:12:58,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-06 18:12:58,925 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-11-06 18:12:58,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 18:12:58,975 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2024-11-06 18:12:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-06 18:12:58,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2024-11-06 18:12:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 18:12:58,983 INFO L225 Difference]: With dead ends: 36 [2024-11-06 18:12:58,983 INFO L226 Difference]: Without dead ends: 18 [2024-11-06 18:12:58,986 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 [2024-11-06 18:12:58,989 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 18:12:58,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 18:12:59,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-06 18:12:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2024-11-06 18:12:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2024-11-06 18:12:59,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-11-06 18:12:59,014 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2024-11-06 18:12:59,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 18:12:59,014 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-11-06 18:12:59,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2024-11-06 18:12:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-11-06 18:12:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-06 18:12:59,015 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 18:12:59,015 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 18:12:59,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-06 18:12:59,016 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 18:12:59,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 18:12:59,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2024-11-06 18:12:59,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 18:12:59,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959822358] [2024-11-06 18:12:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 18:12:59,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 18:12:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 18:12:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 18:12:59,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 18:12:59,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959822358] [2024-11-06 18:12:59,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959822358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 18:12:59,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632995286] [2024-11-06 18:12:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 18:12:59,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 18:12:59,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 18:12:59,125 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) [2024-11-06 18:12:59,127 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 [2024-11-06 18:12:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 18:12:59,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-06 18:12:59,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 18:12:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 18:12:59,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 18:12:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-06 18:12:59,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632995286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 18:12:59,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 18:12:59,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-06 18:12:59,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908153315] [2024-11-06 18:12:59,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 18:12:59,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-06 18:12:59,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 18:12:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-06 18:12:59,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-06 18:12:59,302 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2024-11-06 18:12:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 18:12:59,361 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-11-06 18:12:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-06 18:12:59,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 13 [2024-11-06 18:12:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 18:12:59,362 INFO L225 Difference]: With dead ends: 37 [2024-11-06 18:12:59,362 INFO L226 Difference]: Without dead ends: 26 [2024-11-06 18:12:59,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-06 18:12:59,363 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 18:12:59,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 18:12:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-06 18:12:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-06 18:12:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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) [2024-11-06 18:12:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-11-06 18:12:59,372 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2024-11-06 18:12:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 18:12:59,372 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-11-06 18:12:59,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2024-11-06 18:12:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-11-06 18:12:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-06 18:12:59,372 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 18:12:59,373 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 18:12:59,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-06 18:12:59,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 18:12:59,574 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 18:12:59,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 18:12:59,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1754797751, now seen corresponding path program 2 times [2024-11-06 18:12:59,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 18:12:59,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197753910] [2024-11-06 18:12:59,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 18:12:59,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 18:12:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 18:12:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 18:12:59,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 18:12:59,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197753910] [2024-11-06 18:12:59,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197753910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 18:12:59,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554098513] [2024-11-06 18:12:59,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 18:12:59,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 18:12:59,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 18:12:59,773 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) [2024-11-06 18:12:59,775 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 [2024-11-06 18:12:59,846 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 18:12:59,846 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 18:12:59,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-06 18:12:59,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 18:12:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 18:12:59,888 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 18:12:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 18:12:59,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554098513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 18:12:59,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 18:12:59,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-06 18:12:59,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937993586] [2024-11-06 18:12:59,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 18:12:59,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-06 18:12:59,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 18:12:59,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-06 18:12:59,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-06 18:12:59,984 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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) [2024-11-06 18:13:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 18:13:00,081 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2024-11-06 18:13:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-06 18:13:00,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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 21 [2024-11-06 18:13:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 18:13:00,083 INFO L225 Difference]: With dead ends: 57 [2024-11-06 18:13:00,083 INFO L226 Difference]: Without dead ends: 44 [2024-11-06 18:13:00,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-06 18:13:00,084 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 18:13:00,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 18:13:00,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-06 18:13:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-06 18:13:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 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) [2024-11-06 18:13:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-11-06 18:13:00,098 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 21 [2024-11-06 18:13:00,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 18:13:00,098 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-11-06 18:13:00,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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) [2024-11-06 18:13:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-11-06 18:13:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-06 18:13:00,100 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 18:13:00,100 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 18:13:00,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-06 18:13:00,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 18:13:00,301 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 18:13:00,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 18:13:00,301 INFO L85 PathProgramCache]: Analyzing trace with hash -707072841, now seen corresponding path program 3 times [2024-11-06 18:13:00,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 18:13:00,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308788440] [2024-11-06 18:13:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 18:13:00,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 18:13:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 18:13:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-06 18:13:00,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 18:13:00,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308788440] [2024-11-06 18:13:00,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308788440] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 18:13:00,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718114243] [2024-11-06 18:13:00,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-06 18:13:00,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 18:13:00,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 18:13:00,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 18:13:00,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-06 18:13:00,817 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-06 18:13:00,817 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 18:13:00,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-06 18:13:00,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 18:13:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-06 18:13:00,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 18:13:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-06 18:13:00,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718114243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 18:13:00,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 18:13:00,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 20 [2024-11-06 18:13:00,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510559629] [2024-11-06 18:13:00,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 18:13:00,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-06 18:13:00,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 18:13:00,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-06 18:13:00,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2024-11-06 18:13:00,994 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 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) [2024-11-06 18:13:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 18:13:01,156 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2024-11-06 18:13:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-06 18:13:01,157 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 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 39 [2024-11-06 18:13:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 18:13:01,158 INFO L225 Difference]: With dead ends: 100 [2024-11-06 18:13:01,158 INFO L226 Difference]: Without dead ends: 81 [2024-11-06 18:13:01,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2024-11-06 18:13:01,159 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 18:13:01,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 60 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 18:13:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-06 18:13:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2024-11-06 18:13:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 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) [2024-11-06 18:13:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2024-11-06 18:13:01,184 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 39 [2024-11-06 18:13:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 18:13:01,184 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2024-11-06 18:13:01,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 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) [2024-11-06 18:13:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2024-11-06 18:13:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-06 18:13:01,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 18:13:01,189 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 18:13:01,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-06 18:13:01,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 18:13:01,394 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 18:13:01,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 18:13:01,395 INFO L85 PathProgramCache]: Analyzing trace with hash -775280303, now seen corresponding path program 4 times [2024-11-06 18:13:01,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 18:13:01,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868563071] [2024-11-06 18:13:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 18:13:01,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 18:13:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 18:13:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2024-11-06 18:13:02,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 18:13:02,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868563071] [2024-11-06 18:13:02,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868563071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 18:13:02,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471143243] [2024-11-06 18:13:02,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-06 18:13:02,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 18:13:02,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 18:13:02,078 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 18:13:02,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-06 18:13:02,209 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-06 18:13:02,212 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 18:13:02,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-06 18:13:02,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 18:13:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2024-11-06 18:13:02,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 18:13:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2024-11-06 18:13:02,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471143243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 18:13:02,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 18:13:02,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2024-11-06 18:13:02,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156750087] [2024-11-06 18:13:02,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 18:13:02,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-06 18:13:02,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 18:13:02,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-06 18:13:02,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2024-11-06 18:13:02,869 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 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) [2024-11-06 18:13:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 18:13:03,156 INFO L93 Difference]: Finished difference Result 200 states and 241 transitions. [2024-11-06 18:13:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-06 18:13:03,156 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 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 77 [2024-11-06 18:13:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 18:13:03,157 INFO L225 Difference]: With dead ends: 200 [2024-11-06 18:13:03,157 INFO L226 Difference]: Without dead ends: 157 [2024-11-06 18:13:03,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2024-11-06 18:13:03,160 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-06 18:13:03,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 52 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-06 18:13:03,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-06 18:13:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2024-11-06 18:13:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 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) [2024-11-06 18:13:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2024-11-06 18:13:03,192 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 77 [2024-11-06 18:13:03,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 18:13:03,192 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2024-11-06 18:13:03,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 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) [2024-11-06 18:13:03,193 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2024-11-06 18:13:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-06 18:13:03,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 18:13:03,196 INFO L215 NwaCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 18:13:03,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-06 18:13:03,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 18:13:03,397 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 18:13:03,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 18:13:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash 433379653, now seen corresponding path program 5 times [2024-11-06 18:13:03,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 18:13:03,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662106970] [2024-11-06 18:13:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 18:13:03,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 18:13:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 18:13:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2024-11-06 18:13:05,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 18:13:05,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662106970] [2024-11-06 18:13:05,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662106970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 18:13:05,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68043468] [2024-11-06 18:13:05,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-06 18:13:05,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 18:13:05,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 18:13:05,172 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-06 18:13:05,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process