./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c --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/recursified_nla-digbench/recursified_egcd-ll.c', '-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', '494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc'] 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/recursified_nla-digbench/recursified_egcd-ll.c -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 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-06 23:52:39,162 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-06 23:52:39,229 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-06 23:52:39,232 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-06 23:52:39,233 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-06 23:52:39,245 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-06 23:52:39,246 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-06 23:52:39,246 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-06 23:52:39,246 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-06 23:52:39,247 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-06 23:52:39,247 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-06 23:52:39,247 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-06 23:52:39,247 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-06 23:52:39,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-06 23:52:39,247 INFO L153 SettingsManager]: * Use SBE=true [2024-11-06 23:52:39,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-06 23:52:39,247 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-06 23:52:39,247 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-06 23:52:39,247 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-06 23:52:39,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-06 23:52:39,248 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 23:52:39,248 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-06 23:52:39,248 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-06 23:52:39,249 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-06 23:52:39,249 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-06 23:52:39,249 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 -> 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc [2024-11-06 23:52:39,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-06 23:52:39,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-06 23:52:39,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-06 23:52:39,468 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-06 23:52:39,468 INFO L274 PluginConnector]: CDTParser initialized [2024-11-06 23:52:39,469 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-11-06 23:52:40,563 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-06 23:52:40,726 INFO L384 CDTParser]: Found 1 translation units. [2024-11-06 23:52:40,727 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-11-06 23:52:40,735 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3006afed6/2b55034082744bf9931af275151b0373/FLAG582714366 [2024-11-06 23:52:41,129 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3006afed6/2b55034082744bf9931af275151b0373 [2024-11-06 23:52:41,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-06 23:52:41,132 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-06 23:52:41,132 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-06 23:52:41,132 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-06 23:52:41,135 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-06 23:52:41,135 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,136 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41, skipping insertion in model container [2024-11-06 23:52:41,136 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,145 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 23:52:41,236 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/recursified_nla-digbench/recursified_egcd-ll.c[1019,1032] [2024-11-06 23:52:41,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 23:52:41,265 INFO L200 MainTranslator]: Completed pre-run [2024-11-06 23:52:41,274 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/recursified_nla-digbench/recursified_egcd-ll.c[1019,1032] [2024-11-06 23:52:41,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 23:52:41,302 INFO L204 MainTranslator]: Completed translation [2024-11-06 23:52:41,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41 WrapperNode [2024-11-06 23:52:41,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-06 23:52:41,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-06 23:52:41,306 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-06 23:52:41,306 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-06 23:52:41,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,331 INFO L138 Inliner]: procedures = 16, calls = 106, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 112 [2024-11-06 23:52:41,332 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-06 23:52:41,333 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-06 23:52:41,333 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-06 23:52:41,333 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-06 23:52:41,338 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,344 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,360 INFO L175 MemorySlicer]: Split 66 memory accesses to 9 slices as follows [2, 10, 8, 8, 8, 8, 7, 7, 8]. 15 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0]. The 14 writes are split as follows [0, 2, 2, 2, 2, 2, 1, 1, 2]. [2024-11-06 23:52:41,361 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,361 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,372 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,376 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,378 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-06 23:52:41,378 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-06 23:52:41,378 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-06 23:52:41,378 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-06 23:52:41,379 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (1/1) ... [2024-11-06 23:52:41,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 23:52:41,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:52:41,406 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 23:52:41,408 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 23:52:41,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-06 23:52:41,422 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_48_0 [2024-11-06 23:52:41,422 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_48_0 [2024-11-06 23:52:41,422 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-06 23:52:41,422 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-06 23:52:41,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-06 23:52:41,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-06 23:52:41,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-06 23:52:41,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-06 23:52:41,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-06 23:52:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-06 23:52:41,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-06 23:52:41,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-06 23:52:41,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-06 23:52:41,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-06 23:52:41,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-06 23:52:41,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-11-06 23:52:41,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-06 23:52:41,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-06 23:52:41,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-06 23:52:41,507 INFO L238 CfgBuilder]: Building ICFG [2024-11-06 23:52:41,508 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-06 23:52:41,674 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-06 23:52:41,674 INFO L287 CfgBuilder]: Performing block encoding [2024-11-06 23:52:41,682 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-06 23:52:41,683 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-06 23:52:41,683 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:52:41 BoogieIcfgContainer [2024-11-06 23:52:41,684 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-06 23:52:41,685 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-06 23:52:41,686 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-06 23:52:41,689 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-06 23:52:41,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:52:41" (1/3) ... [2024-11-06 23:52:41,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e5878d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:52:41, skipping insertion in model container [2024-11-06 23:52:41,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:52:41" (2/3) ... [2024-11-06 23:52:41,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e5878d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:52:41, skipping insertion in model container [2024-11-06 23:52:41,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:52:41" (3/3) ... [2024-11-06 23:52:41,692 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd-ll.c [2024-11-06 23:52:41,702 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-06 23:52:41,702 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-06 23:52:41,741 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-06 23:52:41,750 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;@78b56e17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-06 23:52:41,750 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-06 23:52:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-06 23:52:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-06 23:52:41,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:52:41,758 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:52:41,759 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:52:41,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:52:41,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1587638685, now seen corresponding path program 1 times [2024-11-06 23:52:41,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:52:41,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476568793] [2024-11-06 23:52:41,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:41,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:52:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:41,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-06 23:52:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:41,952 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-06 23:52:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 23:52:41,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:52:41,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476568793] [2024-11-06 23:52:41,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476568793] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 23:52:41,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 23:52:41,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-06 23:52:41,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060096537] [2024-11-06 23:52:41,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 23:52:41,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-06 23:52:41,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:52:41,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-06 23:52:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-06 23:52:41,978 INFO L87 Difference]: Start difference. First operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 23:52:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:52:41,990 INFO L93 Difference]: Finished difference Result 81 states and 115 transitions. [2024-11-06 23:52:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-06 23:52:41,991 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2024-11-06 23:52:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:52:41,994 INFO L225 Difference]: With dead ends: 81 [2024-11-06 23:52:41,995 INFO L226 Difference]: Without dead ends: 38 [2024-11-06 23:52:41,997 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-06 23:52:41,998 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 23:52:41,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 23:52:42,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-06 23:52:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-06 23:52:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-06 23:52:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2024-11-06 23:52:42,023 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 21 [2024-11-06 23:52:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:52:42,023 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2024-11-06 23:52:42,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 23:52:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2024-11-06 23:52:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-06 23:52:42,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:52:42,024 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:52:42,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-06 23:52:42,024 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:52:42,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:52:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1820045287, now seen corresponding path program 1 times [2024-11-06 23:52:42,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:52:42,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153222962] [2024-11-06 23:52:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:42,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:52:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:52:42,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330483668] [2024-11-06 23:52:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:42,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:52:42,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:52:42,086 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 23:52:42,087 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 23:52:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:42,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-06 23:52:42,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:52:42,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:42,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:42,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:42,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 23:52:42,442 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 23:52:42,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:52:42,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153222962] [2024-11-06 23:52:42,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:52:42,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330483668] [2024-11-06 23:52:42,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330483668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 23:52:42,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 23:52:42,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-06 23:52:42,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700279591] [2024-11-06 23:52:42,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 23:52:42,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-06 23:52:42,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:52:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-06 23:52:42,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-06 23:52:42,446 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 23:52:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:52:42,645 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-11-06 23:52:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-06 23:52:42,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-06 23:52:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:52:42,646 INFO L225 Difference]: With dead ends: 61 [2024-11-06 23:52:42,646 INFO L226 Difference]: Without dead ends: 59 [2024-11-06 23:52:42,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-06 23:52:42,647 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 23:52:42,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 209 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 23:52:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-06 23:52:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2024-11-06 23:52:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-11-06 23:52:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2024-11-06 23:52:42,655 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 21 [2024-11-06 23:52:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:52:42,655 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2024-11-06 23:52:42,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-06 23:52:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2024-11-06 23:52:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-06 23:52:42,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:52:42,656 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:52:42,669 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 23:52:42,860 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 23:52:42,861 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:52:42,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:52:42,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2119093344, now seen corresponding path program 1 times [2024-11-06 23:52:42,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:52:42,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925476444] [2024-11-06 23:52:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:42,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:52:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:52:42,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919179262] [2024-11-06 23:52:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:42,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:52:42,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:52:42,908 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 23:52:42,909 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 23:52:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:43,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-06 23:52:43,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:52:43,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 23:52:43,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:52:43,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:43,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:43,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-06 23:52:43,362 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 22 treesize of output 10 [2024-11-06 23:52:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 23:52:43,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:52:43,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:52:43,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925476444] [2024-11-06 23:52:43,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:52:43,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919179262] [2024-11-06 23:52:43,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919179262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:52:43,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-06 23:52:43,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-11-06 23:52:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59920524] [2024-11-06 23:52:43,570 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-06 23:52:43,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-06 23:52:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:52:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-06 23:52:43,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-11-06 23:52:43,571 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-06 23:52:47,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 23:52:48,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:52:48,129 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2024-11-06 23:52:48,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-06 23:52:48,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2024-11-06 23:52:48,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:52:48,132 INFO L225 Difference]: With dead ends: 95 [2024-11-06 23:52:48,132 INFO L226 Difference]: Without dead ends: 93 [2024-11-06 23:52:48,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2024-11-06 23:52:48,133 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 95 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-06 23:52:48,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 204 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 361 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-11-06 23:52:48,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-06 23:52:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2024-11-06 23:52:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 58 states have internal predecessors, (62), 22 states have call successors, (22), 9 states have call predecessors, (22), 10 states have return successors, (24), 21 states have call predecessors, (24), 20 states have call successors, (24) [2024-11-06 23:52:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2024-11-06 23:52:48,153 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 27 [2024-11-06 23:52:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:52:48,153 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2024-11-06 23:52:48,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-06 23:52:48,153 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2024-11-06 23:52:48,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-06 23:52:48,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:52:48,154 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:52:48,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-06 23:52:48,357 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 23:52:48,358 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:52:48,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:52:48,358 INFO L85 PathProgramCache]: Analyzing trace with hash 694161815, now seen corresponding path program 1 times [2024-11-06 23:52:48,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:52:48,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709191850] [2024-11-06 23:52:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:48,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:52:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:52:48,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712374416] [2024-11-06 23:52:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:48,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:52:48,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:52:48,412 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 23:52:48,413 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 23:52:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:48,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-06 23:52:48,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:52:48,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 23:52:48,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:48,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:52:48,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:48,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-06 23:52:48,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-06 23:52:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-06 23:52:48,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:52:48,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:52:48,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709191850] [2024-11-06 23:52:48,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:52:48,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712374416] [2024-11-06 23:52:48,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712374416] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:52:48,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-06 23:52:48,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-06 23:52:48,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684525140] [2024-11-06 23:52:48,828 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-06 23:52:48,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-06 23:52:48,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:52:48,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-06 23:52:48,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-06 23:52:48,830 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-06 23:52:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:52:49,112 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2024-11-06 23:52:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-06 23:52:49,113 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-06 23:52:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:52:49,115 INFO L225 Difference]: With dead ends: 146 [2024-11-06 23:52:49,115 INFO L226 Difference]: Without dead ends: 144 [2024-11-06 23:52:49,116 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-06 23:52:49,116 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-06 23:52:49,117 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 171 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-06 23:52:49,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-06 23:52:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2024-11-06 23:52:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 92 states have internal predecessors, (100), 34 states have call successors, (34), 15 states have call predecessors, (34), 17 states have return successors, (37), 33 states have call predecessors, (37), 30 states have call successors, (37) [2024-11-06 23:52:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 171 transitions. [2024-11-06 23:52:49,138 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 171 transitions. Word has length 33 [2024-11-06 23:52:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:52:49,138 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 171 transitions. [2024-11-06 23:52:49,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-06 23:52:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 171 transitions. [2024-11-06 23:52:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-06 23:52:49,139 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:52:49,139 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:52:49,151 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 23:52:49,341 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 23:52:49,342 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:52:49,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:52:49,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1798714572, now seen corresponding path program 1 times [2024-11-06 23:52:49,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:52:49,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299174291] [2024-11-06 23:52:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:49,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:52:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:49,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-06 23:52:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:49,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-06 23:52:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:49,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-06 23:52:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:49,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-06 23:52:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:49,753 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-06 23:52:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:49,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-06 23:52:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-06 23:52:49,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:52:49,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299174291] [2024-11-06 23:52:49,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299174291] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 23:52:49,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 23:52:49,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-06 23:52:49,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46919473] [2024-11-06 23:52:49,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 23:52:49,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-06 23:52:49,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:52:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-06 23:52:49,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-06 23:52:49,765 INFO L87 Difference]: Start difference. First operand 140 states and 171 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-06 23:52:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:52:50,082 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2024-11-06 23:52:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-06 23:52:50,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-11-06 23:52:50,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:52:50,086 INFO L225 Difference]: With dead ends: 160 [2024-11-06 23:52:50,086 INFO L226 Difference]: Without dead ends: 158 [2024-11-06 23:52:50,086 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-06 23:52:50,087 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-06 23:52:50,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 125 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-06 23:52:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-06 23:52:50,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2024-11-06 23:52:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 101 states have (on average 1.118811881188119) internal successors, (113), 105 states have internal predecessors, (113), 34 states have call successors, (34), 19 states have call predecessors, (34), 22 states have return successors, (38), 33 states have call predecessors, (38), 30 states have call successors, (38) [2024-11-06 23:52:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 185 transitions. [2024-11-06 23:52:50,126 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 185 transitions. Word has length 43 [2024-11-06 23:52:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:52:50,127 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 185 transitions. [2024-11-06 23:52:50,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-06 23:52:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 185 transitions. [2024-11-06 23:52:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-06 23:52:50,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:52:50,128 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:52:50,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-06 23:52:50,128 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:52:50,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:52:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1804783998, now seen corresponding path program 1 times [2024-11-06 23:52:50,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:52:50,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878665313] [2024-11-06 23:52:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:50,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:52:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:52:50,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079510510] [2024-11-06 23:52:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:52:50,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:52:50,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:52:50,172 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 23:52:50,173 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 23:52:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:52:50,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-06 23:52:50,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:52:50,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:50,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:50,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:52:50,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 23:52:50,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2024-11-06 23:52:50,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-06 23:52:50,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-06 23:52:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-06 23:52:50,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:53:18,425 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_33_to_48_0_#t~mem6_6| Int)) (let ((.cse0 (select (select |c_#memory_int#8| c_func_to_recursive_line_33_to_48_0_~s.base) c_func_to_recursive_line_33_to_48_0_~s.offset))) (or (< (select (select |c_#memory_int#2| c_func_to_recursive_line_33_to_48_0_~r.base) c_func_to_recursive_line_33_to_48_0_~r.offset) (+ |v_func_to_recursive_line_33_to_48_0_#t~mem6_6| .cse0)) (= (let ((.cse1 (select (select |c_#memory_int#4| c_func_to_recursive_line_33_to_48_0_~q.base) c_func_to_recursive_line_33_to_48_0_~q.offset))) (+ (* |v_func_to_recursive_line_33_to_48_0_#t~mem6_6| .cse1) (* .cse0 .cse1) 1)) (* (select (select |c_#memory_int#5| c_func_to_recursive_line_33_to_48_0_~p.base) c_func_to_recursive_line_33_to_48_0_~p.offset) .cse0))))) is different from false [2024-11-06 23:53:18,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:53:18,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878665313] [2024-11-06 23:53:18,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:53:18,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079510510] [2024-11-06 23:53:18,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079510510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:53:18,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-06 23:53:18,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-06 23:53:18,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774197571] [2024-11-06 23:53:18,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-06 23:53:18,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-06 23:53:18,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:53:18,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-06 23:53:18,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=5, NotChecked=24, Total=210 [2024-11-06 23:53:18,572 INFO L87 Difference]: Start difference. First operand 158 states and 185 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-06 23:53:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:53:20,928 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2024-11-06 23:53:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-06 23:53:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-06 23:53:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:53:20,930 INFO L225 Difference]: With dead ends: 169 [2024-11-06 23:53:20,930 INFO L226 Difference]: Without dead ends: 167 [2024-11-06 23:53:20,931 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=90, Invalid=289, Unknown=5, NotChecked=36, Total=420 [2024-11-06 23:53:20,931 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 48 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-06 23:53:20,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 317 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-06 23:53:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-06 23:53:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 162. [2024-11-06 23:53:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 104 states have (on average 1.1153846153846154) internal successors, (116), 108 states have internal predecessors, (116), 34 states have call successors, (34), 20 states have call predecessors, (34), 23 states have return successors, (38), 33 states have call predecessors, (38), 30 states have call successors, (38) [2024-11-06 23:53:20,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2024-11-06 23:53:20,962 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 44 [2024-11-06 23:53:20,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:53:20,965 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2024-11-06 23:53:20,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-06 23:53:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2024-11-06 23:53:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-06 23:53:20,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:53:20,966 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:53:20,981 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 23:53:21,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-06 23:53:21,167 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:53:21,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:53:21,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1680836672, now seen corresponding path program 1 times [2024-11-06 23:53:21,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:53:21,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539215247] [2024-11-06 23:53:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:53:21,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:53:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:53:21,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114283566] [2024-11-06 23:53:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:53:21,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:53:21,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:53:21,196 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 23:53:21,196 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 [2024-11-06 23:53:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:53:21,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-06 23:53:21,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:53:21,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:53:21,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:53:21,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:53:21,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-06 23:53:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-06 23:53:21,554 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:53:21,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:53:21,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539215247] [2024-11-06 23:53:21,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:53:21,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114283566] [2024-11-06 23:53:21,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114283566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:53:21,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-06 23:53:21,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-06 23:53:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923208143] [2024-11-06 23:53:21,956 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-06 23:53:21,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-06 23:53:21,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:53:21,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-06 23:53:21,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-06 23:53:21,958 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-06 23:53:22,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:53:22,190 INFO L93 Difference]: Finished difference Result 172 states and 197 transitions. [2024-11-06 23:53:22,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-06 23:53:22,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-06 23:53:22,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:53:22,193 INFO L225 Difference]: With dead ends: 172 [2024-11-06 23:53:22,193 INFO L226 Difference]: Without dead ends: 170 [2024-11-06 23:53:22,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-06 23:53:22,193 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-06 23:53:22,194 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 208 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-06 23:53:22,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-06 23:53:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2024-11-06 23:53:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 111 states have internal predecessors, (119), 34 states have call successors, (34), 21 states have call predecessors, (34), 24 states have return successors, (38), 33 states have call predecessors, (38), 30 states have call successors, (38) [2024-11-06 23:53:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 191 transitions. [2024-11-06 23:53:22,233 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 191 transitions. Word has length 44 [2024-11-06 23:53:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:53:22,233 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 191 transitions. [2024-11-06 23:53:22,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-06 23:53:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 191 transitions. [2024-11-06 23:53:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-06 23:53:22,235 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:53:22,235 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:53:22,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-06 23:53:22,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:53:22,436 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:53:22,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:53:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash 795700175, now seen corresponding path program 1 times [2024-11-06 23:53:22,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:53:22,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934039365] [2024-11-06 23:53:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:53:22,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:53:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:53:22,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899360352] [2024-11-06 23:53:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:53:22,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:53:22,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:53:22,462 INFO L229 MonitoredProcess]: Starting monitored process 7 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 23:53:22,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-06 23:53:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 23:53:22,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-06 23:53:22,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:53:22,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 23:53:22,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:53:22,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:53:22,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:53:22,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:53:22,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:53:22,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:53:22,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-06 23:53:22,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-06 23:53:22,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-06 23:53:22,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 33 [2024-11-06 23:53:22,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-06 23:53:22,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 40 [2024-11-06 23:53:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-06 23:53:23,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 23:53:47,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 23:53:47,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934039365] [2024-11-06 23:53:47,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-06 23:53:47,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899360352] [2024-11-06 23:53:47,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899360352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 23:53:47,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-06 23:53:47,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-06 23:53:47,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007759565] [2024-11-06 23:53:47,027 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-06 23:53:47,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-06 23:53:47,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 23:53:47,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-06 23:53:47,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=471, Unknown=5, NotChecked=0, Total=552 [2024-11-06 23:53:47,028 INFO L87 Difference]: Start difference. First operand 166 states and 191 transitions. Second operand has 17 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-06 23:53:51,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 23:54:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 23:54:08,792 INFO L93 Difference]: Finished difference Result 174 states and 197 transitions. [2024-11-06 23:54:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-06 23:54:08,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 49 [2024-11-06 23:54:08,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 23:54:08,795 INFO L225 Difference]: With dead ends: 174 [2024-11-06 23:54:08,795 INFO L226 Difference]: Without dead ends: 172 [2024-11-06 23:54:08,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=165, Invalid=886, Unknown=5, NotChecked=0, Total=1056 [2024-11-06 23:54:08,796 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 32 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2024-11-06 23:54:08,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 138 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 415 Invalid, 3 Unknown, 0 Unchecked, 14.3s Time] [2024-11-06 23:54:08,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-06 23:54:08,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-11-06 23:54:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 110 states have (on average 1.1090909090909091) internal successors, (122), 114 states have internal predecessors, (122), 34 states have call successors, (34), 22 states have call predecessors, (34), 25 states have return successors, (38), 33 states have call predecessors, (38), 30 states have call successors, (38) [2024-11-06 23:54:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 194 transitions. [2024-11-06 23:54:08,817 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 194 transitions. Word has length 49 [2024-11-06 23:54:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 23:54:08,817 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 194 transitions. [2024-11-06 23:54:08,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-06 23:54:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 194 transitions. [2024-11-06 23:54:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-06 23:54:08,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 23:54:08,817 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 23:54:08,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-06 23:54:09,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-06 23:54:09,022 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 23:54:09,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 23:54:09,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1989012997, now seen corresponding path program 2 times [2024-11-06 23:54:09,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 23:54:09,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420467291] [2024-11-06 23:54:09,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 23:54:09,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 23:54:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-06 23:54:09,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63109451] [2024-11-06 23:54:09,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 23:54:09,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 23:54:09,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 23:54:09,059 INFO L229 MonitoredProcess]: Starting monitored process 8 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 23:54:09,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-06 23:54:09,205 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 23:54:09,205 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 23:54:09,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 171 conjuncts are in the unsatisfiable core [2024-11-06 23:54:09,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 23:54:09,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 23:54:09,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 23:54:09,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:54:09,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:54:09,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:54:09,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:54:09,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-06 23:54:09,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 23:54:19,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-11-06 23:54:19,706 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 29 treesize of output 21 [2024-11-06 23:54:19,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-06 23:54:19,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-11-06 23:54:22,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-06 23:54:22,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-06 23:54:22,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-06 23:54:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-06 23:54:24,523 INFO L311 TraceCheckSpWp]: Computing backward predicates...