./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/dll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml', '-i', '../sv-benchmarks/c/list-simple/dll2n_append_equal.i', '-s', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf', '--cacsl2boogietranslator.entry.function', 'main', '--witnessprinter.witness.directory', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux', '--witnessprinter.witness.filename', 'witness', '--witnessprinter.write.witness.besides.input.file', 'false', '--witnessprinter.graph.data.specification', 'CHECK( init(main()), LTL(G ! call(reach_error())) )\n\n', '--witnessprinter.graph.data.producer', 'Automizer', '--witnessprinter.graph.data.architecture', '32bit', '--witnessprinter.graph.data.programhash', '3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda'] 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/list-simple/dll2n_append_equal.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-06 22:28:10,787 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-06 22:28:10,844 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-06 22:28:10,850 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-06 22:28:10,850 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-06 22:28:10,878 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-06 22:28:10,878 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-06 22:28:10,878 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-06 22:28:10,879 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-06 22:28:10,880 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-06 22:28:10,880 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-06 22:28:10,880 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-06 22:28:10,880 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-06 22:28:10,881 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-06 22:28:10,881 INFO L153 SettingsManager]: * Use SBE=true [2024-11-06 22:28:10,881 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-06 22:28:10,881 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-06 22:28:10,881 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-06 22:28:10,881 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-06 22:28:10,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-06 22:28:10,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-06 22:28:10,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-06 22:28:10,882 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-06 22:28:10,882 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-06 22:28:10,882 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-06 22:28:10,882 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-06 22:28:10,882 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-06 22:28:10,882 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-06 22:28:10,882 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-06 22:28:10,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-06 22:28:10,883 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-06 22:28:10,883 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-06 22:28:10,883 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 22:28:10,883 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-06 22:28:10,883 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-06 22:28:10,884 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-06 22:28:10,884 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-06 22:28:10,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-06 22:28:10,884 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-06 22:28:10,884 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-06 22:28:10,884 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-06 22:28:10,884 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-06 22:28:10,884 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 -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2024-11-06 22:28:11,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-06 22:28:11,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-06 22:28:11,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-06 22:28:11,150 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-06 22:28:11,151 INFO L274 PluginConnector]: CDTParser initialized [2024-11-06 22:28:11,153 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2024-11-06 22:28:12,286 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-06 22:28:12,544 INFO L384 CDTParser]: Found 1 translation units. [2024-11-06 22:28:12,544 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2024-11-06 22:28:12,559 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/82de7f3af/3541ed5190b74cd1896435b8d412c9b7/FLAG08970844e [2024-11-06 22:28:12,862 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/82de7f3af/3541ed5190b74cd1896435b8d412c9b7 [2024-11-06 22:28:12,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-06 22:28:12,865 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-06 22:28:12,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-06 22:28:12,866 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-06 22:28:12,869 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-06 22:28:12,870 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:28:12" (1/1) ... [2024-11-06 22:28:12,870 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b293833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:12, skipping insertion in model container [2024-11-06 22:28:12,870 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:28:12" (1/1) ... [2024-11-06 22:28:12,888 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-06 22:28:13,081 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/list-simple/dll2n_append_equal.i[24333,24346] [2024-11-06 22:28:13,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 22:28:13,090 INFO L200 MainTranslator]: Completed pre-run [2024-11-06 22:28:13,122 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/list-simple/dll2n_append_equal.i[24333,24346] [2024-11-06 22:28:13,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-06 22:28:13,145 INFO L204 MainTranslator]: Completed translation [2024-11-06 22:28:13,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13 WrapperNode [2024-11-06 22:28:13,147 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-06 22:28:13,147 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-06 22:28:13,148 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-06 22:28:13,148 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-06 22:28:13,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (1/1) ... [2024-11-06 22:28:13,165 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (1/1) ... [2024-11-06 22:28:13,181 INFO L138 Inliner]: procedures = 127, calls = 37, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 124 [2024-11-06 22:28:13,181 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-06 22:28:13,182 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-06 22:28:13,182 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-06 22:28:13,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-06 22:28:13,188 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (1/1) ... [2024-11-06 22:28:13,189 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (1/1) ... [2024-11-06 22:28:13,191 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (1/1) ... [2024-11-06 22:28:13,207 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 13, 6]. 62 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 9 writes are split as follows [0, 8, 1]. [2024-11-06 22:28:13,208 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (1/1) ... [2024-11-06 22:28:13,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (1/1) ... [2024-11-06 22:28:13,214 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (1/1) ... [2024-11-06 22:28:13,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (1/1) ... [2024-11-06 22:28:13,221 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (1/1) ... [2024-11-06 22:28:13,222 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (1/1) ... [2024-11-06 22:28:13,224 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-06 22:28:13,224 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-06 22:28:13,225 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-06 22:28:13,225 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-06 22:28:13,225 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (1/1) ... [2024-11-06 22:28:13,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-06 22:28:13,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:28:13,254 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 22:28:13,264 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 22:28:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-06 22:28:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-06 22:28:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-06 22:28:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-06 22:28:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-06 22:28:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-06 22:28:13,286 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-06 22:28:13,286 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-06 22:28:13,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-06 22:28:13,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-06 22:28:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-06 22:28:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-06 22:28:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-06 22:28:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-06 22:28:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-06 22:28:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-06 22:28:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-06 22:28:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-06 22:28:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-06 22:28:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-06 22:28:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-06 22:28:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-06 22:28:13,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-06 22:28:13,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-06 22:28:13,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-06 22:28:13,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-06 22:28:13,390 INFO L238 CfgBuilder]: Building ICFG [2024-11-06 22:28:13,391 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-06 22:28:13,564 INFO L? ?]: Removed 45 outVars from TransFormulas that were not future-live. [2024-11-06 22:28:13,565 INFO L287 CfgBuilder]: Performing block encoding [2024-11-06 22:28:13,597 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-06 22:28:13,598 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-06 22:28:13,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:28:13 BoogieIcfgContainer [2024-11-06 22:28:13,598 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-06 22:28:13,601 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-06 22:28:13,601 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-06 22:28:13,605 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-06 22:28:13,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:28:12" (1/3) ... [2024-11-06 22:28:13,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a33302a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:28:13, skipping insertion in model container [2024-11-06 22:28:13,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:13" (2/3) ... [2024-11-06 22:28:13,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a33302a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:28:13, skipping insertion in model container [2024-11-06 22:28:13,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:28:13" (3/3) ... [2024-11-06 22:28:13,608 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2024-11-06 22:28:13,619 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-06 22:28:13,620 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-06 22:28:13,665 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-06 22:28:13,675 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;@4e128174, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-06 22:28:13,676 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-06 22:28:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 22:28:13,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-06 22:28:13,686 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:28:13,687 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:28:13,687 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:28:13,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:28:13,690 INFO L85 PathProgramCache]: Analyzing trace with hash 308507763, now seen corresponding path program 1 times [2024-11-06 22:28:13,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:28:13,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014165482] [2024-11-06 22:28:13,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:13,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:28:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:13,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-06 22:28:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:28:13,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:28:13,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014165482] [2024-11-06 22:28:13,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014165482] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:28:13,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 22:28:13,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-06 22:28:13,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155696974] [2024-11-06 22:28:13,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:28:13,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-06 22:28:13,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:28:13,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-06 22:28:13,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-06 22:28:13,880 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-06 22:28:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:28:13,921 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2024-11-06 22:28:13,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-06 22:28:13,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-06 22:28:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:28:13,926 INFO L225 Difference]: With dead ends: 57 [2024-11-06 22:28:13,926 INFO L226 Difference]: Without dead ends: 26 [2024-11-06 22:28:13,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-06 22:28:13,930 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 22:28:13,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:28:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-06 22:28:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-06 22:28:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 22:28:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-11-06 22:28:13,955 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2024-11-06 22:28:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:28:13,955 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-11-06 22:28:13,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-06 22:28:13,955 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-11-06 22:28:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-06 22:28:13,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:28:13,956 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:28:13,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-06 22:28:13,957 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:28:13,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:28:13,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2109805219, now seen corresponding path program 1 times [2024-11-06 22:28:13,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:28:13,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450514245] [2024-11-06 22:28:13,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:13,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:28:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:14,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-06 22:28:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:28:14,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:28:14,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450514245] [2024-11-06 22:28:14,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450514245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:28:14,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 22:28:14,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-06 22:28:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338798385] [2024-11-06 22:28:14,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:28:14,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-06 22:28:14,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:28:14,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-06 22:28:14,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-06 22:28:14,180 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-06 22:28:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:28:14,227 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2024-11-06 22:28:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-06 22:28:14,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-06 22:28:14,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:28:14,228 INFO L225 Difference]: With dead ends: 50 [2024-11-06 22:28:14,228 INFO L226 Difference]: Without dead ends: 31 [2024-11-06 22:28:14,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-06 22:28:14,229 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 22:28:14,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 72 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:28:14,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-06 22:28:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2024-11-06 22:28:14,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 22:28:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-11-06 22:28:14,233 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2024-11-06 22:28:14,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:28:14,234 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-11-06 22:28:14,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-06 22:28:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-11-06 22:28:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-06 22:28:14,234 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:28:14,235 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 22:28:14,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-06 22:28:14,235 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:28:14,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:28:14,235 INFO L85 PathProgramCache]: Analyzing trace with hash 493100305, now seen corresponding path program 1 times [2024-11-06 22:28:14,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:28:14,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799157289] [2024-11-06 22:28:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:14,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:28:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:14,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 22:28:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:14,381 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-06 22:28:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-06 22:28:14,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:28:14,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799157289] [2024-11-06 22:28:14,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799157289] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:28:14,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-06 22:28:14,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-06 22:28:14,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9550442] [2024-11-06 22:28:14,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:28:14,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-06 22:28:14,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:28:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-06 22:28:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-06 22:28:14,409 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 22:28:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:28:14,460 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2024-11-06 22:28:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-06 22:28:14,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-06 22:28:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:28:14,461 INFO L225 Difference]: With dead ends: 54 [2024-11-06 22:28:14,462 INFO L226 Difference]: Without dead ends: 30 [2024-11-06 22:28:14,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-06 22:28:14,462 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 22:28:14,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:28:14,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-06 22:28:14,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-06 22:28:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-06 22:28:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-06 22:28:14,469 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 27 [2024-11-06 22:28:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:28:14,470 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-06 22:28:14,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 22:28:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-06 22:28:14,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-06 22:28:14,470 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:28:14,470 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 22:28:14,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-06 22:28:14,471 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:28:14,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:28:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1095247597, now seen corresponding path program 1 times [2024-11-06 22:28:14,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:28:14,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132445926] [2024-11-06 22:28:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:14,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:28:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:14,580 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 22:28:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:14,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-06 22:28:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-06 22:28:14,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:28:14,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132445926] [2024-11-06 22:28:14,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132445926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:28:14,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926779099] [2024-11-06 22:28:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:14,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:28:14,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:28:14,602 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 22:28:14,604 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 22:28:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:14,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-06 22:28:14,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:28:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:28:14,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:28:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-06 22:28:14,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926779099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 22:28:14,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 22:28:14,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2024-11-06 22:28:14,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261140792] [2024-11-06 22:28:14,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 22:28:14,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-06 22:28:14,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:28:14,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-06 22:28:14,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-06 22:28:14,795 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-06 22:28:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:28:14,848 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2024-11-06 22:28:14,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-06 22:28:14,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2024-11-06 22:28:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:28:14,849 INFO L225 Difference]: With dead ends: 51 [2024-11-06 22:28:14,849 INFO L226 Difference]: Without dead ends: 32 [2024-11-06 22:28:14,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-06 22:28:14,849 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-06 22:28:14,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 118 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-06 22:28:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-06 22:28:14,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-06 22:28:14,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-06 22:28:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-11-06 22:28:14,855 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 27 [2024-11-06 22:28:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:28:14,855 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-11-06 22:28:14,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-06 22:28:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-11-06 22:28:14,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-06 22:28:14,856 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:28:14,856 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:28:14,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-06 22:28:15,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:28:15,057 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:28:15,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:28:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash -292922041, now seen corresponding path program 1 times [2024-11-06 22:28:15,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:28:15,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064987698] [2024-11-06 22:28:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:15,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:28:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:15,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 22:28:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:15,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-06 22:28:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:15,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-06 22:28:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-06 22:28:15,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:28:15,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064987698] [2024-11-06 22:28:15,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064987698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:28:15,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066938376] [2024-11-06 22:28:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:15,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:28:15,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:28:15,452 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 22:28:15,454 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 22:28:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:15,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-06 22:28:15,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:28:15,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-06 22:28:15,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-06 22:28:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-06 22:28:15,741 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-06 22:28:15,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066938376] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-06 22:28:15,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-06 22:28:15,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 16 [2024-11-06 22:28:15,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278843083] [2024-11-06 22:28:15,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-06 22:28:15,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-06 22:28:15,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:28:15,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-06 22:28:15,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2024-11-06 22:28:15,742 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 22:28:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:28:15,815 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2024-11-06 22:28:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-06 22:28:15,816 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2024-11-06 22:28:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:28:15,817 INFO L225 Difference]: With dead ends: 45 [2024-11-06 22:28:15,817 INFO L226 Difference]: Without dead ends: 42 [2024-11-06 22:28:15,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2024-11-06 22:28:15,817 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-06 22:28:15,818 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 177 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-06 22:28:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-06 22:28:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2024-11-06 22:28:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-06 22:28:15,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-11-06 22:28:15,837 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 37 [2024-11-06 22:28:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:28:15,837 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-11-06 22:28:15,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-06 22:28:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-11-06 22:28:15,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-06 22:28:15,838 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:28:15,838 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:28:15,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-06 22:28:16,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:28:16,041 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:28:16,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:28:16,042 INFO L85 PathProgramCache]: Analyzing trace with hash -292920367, now seen corresponding path program 1 times [2024-11-06 22:28:16,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:28:16,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123269314] [2024-11-06 22:28:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:16,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:28:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:16,323 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 22:28:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:16,331 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-06 22:28:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:16,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-06 22:28:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-06 22:28:16,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:28:16,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123269314] [2024-11-06 22:28:16,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123269314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:28:16,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905829666] [2024-11-06 22:28:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:16,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:28:16,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:28:16,396 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 22:28:16,397 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 22:28:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:16,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-06 22:28:16,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:28:16,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-06 22:28:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-06 22:28:16,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:28:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-06 22:28:16,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905829666] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 22:28:16,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 22:28:16,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 14 [2024-11-06 22:28:16,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842817047] [2024-11-06 22:28:16,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 22:28:16,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-06 22:28:16,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:28:16,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-06 22:28:16,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-11-06 22:28:16,712 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-06 22:28:20,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 22:28:24,767 WARN L539 Checker$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 22:28:28,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 22:28:32,819 WARN L539 Checker$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 22:28:36,845 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 22:28:36,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:28:36,979 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2024-11-06 22:28:36,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-06 22:28:36,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2024-11-06 22:28:36,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:28:36,980 INFO L225 Difference]: With dead ends: 63 [2024-11-06 22:28:36,980 INFO L226 Difference]: Without dead ends: 37 [2024-11-06 22:28:36,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-11-06 22:28:36,980 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2024-11-06 22:28:36,981 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 238 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 5 Unknown, 0 Unchecked, 20.2s Time] [2024-11-06 22:28:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-06 22:28:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-06 22:28:36,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-06 22:28:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-11-06 22:28:36,985 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 37 [2024-11-06 22:28:36,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:28:36,985 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-11-06 22:28:36,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-06 22:28:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-11-06 22:28:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-06 22:28:36,986 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:28:36,986 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:28:37,000 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 22:28:37,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:28:37,187 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:28:37,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:28:37,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1499731437, now seen corresponding path program 1 times [2024-11-06 22:28:37,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:28:37,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740876642] [2024-11-06 22:28:37,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:37,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:28:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:37,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 22:28:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:37,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-06 22:28:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:37,396 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-06 22:28:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-06 22:28:37,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:28:37,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740876642] [2024-11-06 22:28:37,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740876642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:28:37,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422447258] [2024-11-06 22:28:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:37,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:28:37,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:28:37,407 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 22:28:37,409 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 22:28:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:37,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-06 22:28:37,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:28:37,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-06 22:28:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-06 22:28:37,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:28:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-06 22:28:37,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422447258] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-06 22:28:37,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-06 22:28:37,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 12 [2024-11-06 22:28:37,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363676886] [2024-11-06 22:28:37,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-06 22:28:37,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-06 22:28:37,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:28:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-06 22:28:37,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-11-06 22:28:37,686 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-06 22:28:41,699 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 22:28:45,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 22:28:49,731 WARN L539 Checker$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 22:28:53,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-06 22:28:57,771 WARN L539 Checker$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 22:28:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:28:57,875 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2024-11-06 22:28:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-06 22:28:57,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-11-06 22:28:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:28:57,878 INFO L225 Difference]: With dead ends: 44 [2024-11-06 22:28:57,878 INFO L226 Difference]: Without dead ends: 41 [2024-11-06 22:28:57,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-11-06 22:28:57,878 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2024-11-06 22:28:57,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 188 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 177 Invalid, 5 Unknown, 0 Unchecked, 20.1s Time] [2024-11-06 22:28:57,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-06 22:28:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-11-06 22:28:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-06 22:28:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-11-06 22:28:57,887 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 40 [2024-11-06 22:28:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:28:57,888 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-11-06 22:28:57,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-06 22:28:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-11-06 22:28:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-06 22:28:57,888 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:28:57,888 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:28:57,902 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 22:28:58,089 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,SelfDestructingSolverStorable6 [2024-11-06 22:28:58,089 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:28:58,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:28:58,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1499729763, now seen corresponding path program 1 times [2024-11-06 22:28:58,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:28:58,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144559630] [2024-11-06 22:28:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:58,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:28:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:59,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 22:28:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:59,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-06 22:28:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:59,190 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-06 22:28:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-06 22:28:59,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:28:59,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144559630] [2024-11-06 22:28:59,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144559630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:28:59,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221295047] [2024-11-06 22:28:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:28:59,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:28:59,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:28:59,312 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 22:28:59,313 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 22:28:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:28:59,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-06 22:28:59,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:28:59,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-06 22:28:59,970 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-06 22:28:59,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-06 22:29:00,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2024-11-06 22:29:00,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-06 22:29:00,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-06 22:29:00,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-06 22:29:00,521 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-06 22:29:00,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-06 22:29:00,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-06 22:29:00,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 26 [2024-11-06 22:29:00,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 15 [2024-11-06 22:29:00,820 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 22:29:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:29:00,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:29:00,895 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1205 (Array Int Int)) (v_ArrVal_1204 (Array Int Int))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1205) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1204) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (not (= (let ((.cse0 (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (store (select |c_#memory_int#1| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse0 (select v_ArrVal_1205 .cse0))) v_ArrVal_1205)))) is different from false [2024-11-06 22:29:00,923 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1205 (Array Int Int)) (v_ArrVal_1204 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (or (not (= v_ArrVal_1205 (let ((.cse1 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (store (select |c_#memory_int#1| .cse0) .cse1 (select v_ArrVal_1205 .cse1))))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| .cse0 v_ArrVal_1205) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1204) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2024-11-06 22:29:00,933 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1205 (Array Int Int)) (v_ArrVal_1204 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| .cse0 v_ArrVal_1205) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_1204) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (not (= v_ArrVal_1205 (let ((.cse1 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (store (select |c_#memory_int#1| .cse0) .cse1 (select v_ArrVal_1205 .cse1)))))))) is different from false [2024-11-06 22:29:01,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221295047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:29:01,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 22:29:01,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 47 [2024-11-06 22:29:01,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294309121] [2024-11-06 22:29:01,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 22:29:01,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-06 22:29:01,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:29:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-06 22:29:01,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2106, Unknown=3, NotChecked=282, Total=2550 [2024-11-06 22:29:01,024 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 47 states, 45 states have (on average 1.4) internal successors, (63), 38 states have internal predecessors, (63), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 22:29:02,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:29:02,100 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2024-11-06 22:29:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-06 22:29:02,101 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.4) internal successors, (63), 38 states have internal predecessors, (63), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2024-11-06 22:29:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:29:02,102 INFO L225 Difference]: With dead ends: 54 [2024-11-06 22:29:02,102 INFO L226 Difference]: Without dead ends: 52 [2024-11-06 22:29:02,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=290, Invalid=3625, Unknown=3, NotChecked=372, Total=4290 [2024-11-06 22:29:02,104 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-06 22:29:02,104 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 408 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-06 22:29:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-06 22:29:02,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2024-11-06 22:29:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-06 22:29:02,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-06 22:29:02,114 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 40 [2024-11-06 22:29:02,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:29:02,115 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-06 22:29:02,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.4) internal successors, (63), 38 states have internal predecessors, (63), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 22:29:02,116 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-06 22:29:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-06 22:29:02,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:29:02,117 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:29:02,131 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 22:29:02,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:29:02,320 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:29:02,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:29:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1868742190, now seen corresponding path program 1 times [2024-11-06 22:29:02,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:29:02,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975372895] [2024-11-06 22:29:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:29:02,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:29:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:02,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 22:29:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:02,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-06 22:29:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:03,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-06 22:29:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-06 22:29:03,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:29:03,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975372895] [2024-11-06 22:29:03,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975372895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:29:03,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852172364] [2024-11-06 22:29:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:29:03,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:29:03,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:29:03,107 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 22:29:03,108 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 22:29:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:03,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-06 22:29:03,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:29:03,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-06 22:29:03,373 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-06 22:29:03,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-06 22:29:03,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-06 22:29:03,438 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2024-11-06 22:29:03,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2024-11-06 22:29:03,587 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 60 treesize of output 18 [2024-11-06 22:29:03,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-06 22:29:03,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-06 22:29:03,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 51 [2024-11-06 22:29:03,669 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2024-11-06 22:29:03,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2024-11-06 22:29:03,866 INFO L349 Elim1Store]: treesize reduction 71, result has 19.3 percent of original size [2024-11-06 22:29:03,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 54 [2024-11-06 22:29:03,881 INFO L349 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2024-11-06 22:29:03,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 93 [2024-11-06 22:29:03,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-11-06 22:29:03,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2024-11-06 22:29:03,918 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 36 treesize of output 24 [2024-11-06 22:29:03,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2024-11-06 22:29:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:29:03,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:29:04,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852172364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:29:04,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 22:29:04,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 39 [2024-11-06 22:29:04,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105230465] [2024-11-06 22:29:04,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 22:29:04,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-06 22:29:04,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:29:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-06 22:29:04,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1940, Unknown=2, NotChecked=0, Total=2070 [2024-11-06 22:29:04,355 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 39 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 32 states have internal predecessors, (59), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-06 22:29:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:29:05,418 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2024-11-06 22:29:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-06 22:29:05,419 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 32 states have internal predecessors, (59), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2024-11-06 22:29:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:29:05,419 INFO L225 Difference]: With dead ends: 59 [2024-11-06 22:29:05,419 INFO L226 Difference]: Without dead ends: 50 [2024-11-06 22:29:05,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=296, Invalid=3862, Unknown=2, NotChecked=0, Total=4160 [2024-11-06 22:29:05,420 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-06 22:29:05,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 385 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-06 22:29:05,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-06 22:29:05,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2024-11-06 22:29:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-06 22:29:05,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-11-06 22:29:05,429 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 42 [2024-11-06 22:29:05,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:29:05,429 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-11-06 22:29:05,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 32 states have internal predecessors, (59), 4 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-06 22:29:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-11-06 22:29:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-06 22:29:05,430 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:29:05,430 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-11-06 22:29:05,442 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 22:29:05,630 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,SelfDestructingSolverStorable8 [2024-11-06 22:29:05,630 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:29:05,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:29:05,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1422189688, now seen corresponding path program 1 times [2024-11-06 22:29:05,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:29:05,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583486318] [2024-11-06 22:29:05,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:29:05,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:29:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:06,491 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 22:29:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:06,555 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-06 22:29:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:06,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-06 22:29:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-06 22:29:06,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:29:06,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583486318] [2024-11-06 22:29:06,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583486318] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:29:06,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005733129] [2024-11-06 22:29:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:29:06,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:29:06,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:29:06,848 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 22:29:06,850 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 22:29:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:07,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-06 22:29:07,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:29:07,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-06 22:29:07,480 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-06 22:29:07,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-06 22:29:07,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2024-11-06 22:29:07,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 22:29:07,584 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-06 22:29:07,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-11-06 22:29:07,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-06 22:29:07,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-06 22:29:07,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-06 22:29:07,812 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 11 treesize of output 3 [2024-11-06 22:29:07,966 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-06 22:29:07,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2024-11-06 22:29:07,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-06 22:29:07,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 27 [2024-11-06 22:29:07,987 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-06 22:29:07,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-11-06 22:29:08,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2024-11-06 22:29:08,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2024-11-06 22:29:08,364 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 22:29:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:29:08,429 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:29:12,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005733129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:29:12,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 22:29:12,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2024-11-06 22:29:12,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877060501] [2024-11-06 22:29:12,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 22:29:12,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-06 22:29:12,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:29:12,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-06 22:29:12,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2936, Unknown=85, NotChecked=0, Total=3192 [2024-11-06 22:29:12,852 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 52 states, 50 states have (on average 1.4) internal successors, (70), 43 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 22:29:18,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:29:18,536 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2024-11-06 22:29:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-06 22:29:18,537 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.4) internal successors, (70), 43 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2024-11-06 22:29:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:29:18,538 INFO L225 Difference]: With dead ends: 59 [2024-11-06 22:29:18,538 INFO L226 Difference]: Without dead ends: 57 [2024-11-06 22:29:18,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=371, Invalid=5704, Unknown=87, NotChecked=0, Total=6162 [2024-11-06 22:29:18,539 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-06 22:29:18,539 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 451 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-06 22:29:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-06 22:29:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2024-11-06 22:29:18,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-06 22:29:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2024-11-06 22:29:18,545 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 42 [2024-11-06 22:29:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:29:18,546 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2024-11-06 22:29:18,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.4) internal successors, (70), 43 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 22:29:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2024-11-06 22:29:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-06 22:29:18,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:29:18,548 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:29:18,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-06 22:29:18,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:29:18,748 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:29:18,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:29:18,749 INFO L85 PathProgramCache]: Analyzing trace with hash 924724691, now seen corresponding path program 1 times [2024-11-06 22:29:18,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:29:18,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462139479] [2024-11-06 22:29:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:29:18,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:29:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:20,216 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 22:29:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:20,296 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-06 22:29:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:20,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-06 22:29:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-06 22:29:20,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:29:20,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462139479] [2024-11-06 22:29:20,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462139479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:29:20,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863947094] [2024-11-06 22:29:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:29:20,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:29:20,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:29:20,727 INFO L229 MonitoredProcess]: Starting monitored process 9 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 22:29:20,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-06 22:29:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:20,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-11-06 22:29:20,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:29:20,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-06 22:29:21,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2024-11-06 22:29:21,295 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-06 22:29:21,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-06 22:29:21,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-06 22:29:21,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 22:29:21,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-06 22:29:21,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 22:29:21,446 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-06 22:29:21,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 75 [2024-11-06 22:29:21,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-06 22:29:21,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2024-11-06 22:29:21,705 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 45 treesize of output 21 [2024-11-06 22:29:21,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-06 22:29:21,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-06 22:29:21,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-06 22:29:21,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-06 22:29:21,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2024-11-06 22:29:21,931 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2024-11-06 22:29:21,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 31 [2024-11-06 22:29:21,950 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-06 22:29:21,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-11-06 22:29:21,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-06 22:29:22,594 INFO L349 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2024-11-06 22:29:22,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 97 [2024-11-06 22:29:22,612 INFO L349 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2024-11-06 22:29:22,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 274 treesize of output 161 [2024-11-06 22:29:22,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 71 [2024-11-06 22:29:22,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 35 [2024-11-06 22:29:22,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-06 22:29:22,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 72 [2024-11-06 22:29:22,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 19 [2024-11-06 22:29:22,734 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 115 treesize of output 75 [2024-11-06 22:29:22,840 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-06 22:29:22,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 35 [2024-11-06 22:29:22,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2024-11-06 22:29:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:29:22,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:29:23,052 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1956 (Array Int Int)) (v_ArrVal_1955 (Array Int Int)) (v_ArrVal_1954 (Array Int Int)) (v_ArrVal_1951 (Array Int Int))) (let ((.cse0 (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (or (not (= v_ArrVal_1956 (store (select |c_#memory_int#1| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse0 (select v_ArrVal_1956 .cse0)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_1956) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1954) (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse0 |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1955) .cse1) .cse2)) (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse0 |c_ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1951) .cse1) .cse2))))))) is different from false [2024-11-06 22:29:23,265 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1956 (Array Int Int)) (v_ArrVal_1955 (Array Int Int)) (v_ArrVal_1954 (Array Int Int)) (v_ArrVal_1951 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_28| Int)) (let ((.cse2 (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse2))) (let ((.cse3 (select |c_#memory_$Pointer$#1.offset| .cse0)) (.cse1 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_28| 4))) (or (not (= (store (select |c_#memory_int#1| .cse0) .cse1 (select v_ArrVal_1956 .cse1)) v_ArrVal_1956)) (< |v_ULTIMATE.start_dll_append_~last~0#1.offset_28| (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse2)) (not (= (select .cse3 .cse1) 0)) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse4 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (store (store |c_#memory_int#1| .cse0 v_ArrVal_1956) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1954) (select (select (store (store |c_#memory_$Pointer$#1.base| .cse0 (store (select |c_#memory_$Pointer$#1.base| .cse0) .cse1 |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1955) .cse4) .cse5)) (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 (store .cse3 .cse1 |c_ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1951) .cse4) .cse5))))))))) is different from false [2024-11-06 22:29:23,301 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1956 (Array Int Int)) (v_ArrVal_1955 (Array Int Int)) (v_ArrVal_1954 (Array Int Int)) (v_ArrVal_1951 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_28| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse3 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| .cse2) .cse3))) (let ((.cse6 (select |c_#memory_$Pointer$#1.offset| .cse0)) (.cse1 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_28| 4))) (or (not (= (store (select |c_#memory_int#1| .cse0) .cse1 (select v_ArrVal_1956 .cse1)) v_ArrVal_1956)) (< |v_ULTIMATE.start_dll_append_~last~0#1.offset_28| (select (select |c_#memory_$Pointer$#1.offset| .cse2) .cse3)) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse4 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (store (store |c_#memory_int#1| .cse0 v_ArrVal_1956) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1954) (select (select (store (store |c_#memory_$Pointer$#1.base| .cse0 (store (select |c_#memory_$Pointer$#1.base| .cse0) .cse1 |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1955) .cse4) .cse5)) (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 (store .cse6 .cse1 |c_ULTIMATE.start_dll_append_~new_last~0#1.offset|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_1951) .cse4) .cse5)))) (not (= (select .cse6 .cse1) 0))))))) is different from false [2024-11-06 22:29:23,506 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1967 (Array Int Int)) (v_ArrVal_1956 (Array Int Int)) (v_ArrVal_1955 (Array Int Int)) (v_ArrVal_1966 (Array Int Int)) (v_ArrVal_1954 (Array Int Int)) (v_ArrVal_1965 (Array Int Int)) (v_ArrVal_1951 (Array Int Int)) (|v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| Int) (|v_ULTIMATE.start_dll_append_~last~0#1.offset_28| Int)) (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_1967)) (.cse7 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse8 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (let ((.cse6 (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_1965)) (.cse0 (select (select .cse1 .cse7) .cse8))) (let ((.cse5 (select .cse6 .cse0)) (.cse2 (+ |v_ULTIMATE.start_dll_append_~last~0#1.offset_28| 4))) (or (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse3 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (select (store (store |c_#memory_int#1| .cse0 v_ArrVal_1956) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_1954) (select (select (store (store |c_#memory_$Pointer$#1.base| .cse0 (store (select .cse1 .cse0) .cse2 |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35|)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_1955) .cse3) .cse4)) (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 (store .cse5 .cse2 0)) |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_1951) .cse3) .cse4)))) (not (= (store (select (store |c_#memory_int#1| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35| v_ArrVal_1966) .cse0) .cse2 (select v_ArrVal_1956 .cse2)) v_ArrVal_1956)) (not (= (select |c_#valid| |v_ULTIMATE.start_dll_append_#t~ret7#1.base_35|) 0)) (< |v_ULTIMATE.start_dll_append_~last~0#1.offset_28| (select (select .cse6 .cse7) .cse8)) (not (= (select .cse5 .cse2) 0))))))) is different from false [2024-11-06 22:29:23,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863947094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:29:23,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 22:29:23,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2024-11-06 22:29:23,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371484449] [2024-11-06 22:29:23,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 22:29:23,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-06 22:29:23,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:29:23,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-06 22:29:23,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3460, Unknown=4, NotChecked=484, Total=4160 [2024-11-06 22:29:23,511 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 55 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 46 states have internal predecessors, (73), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 22:29:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:29:25,335 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2024-11-06 22:29:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-06 22:29:25,336 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 46 states have internal predecessors, (73), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2024-11-06 22:29:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:29:25,336 INFO L225 Difference]: With dead ends: 60 [2024-11-06 22:29:25,336 INFO L226 Difference]: Without dead ends: 58 [2024-11-06 22:29:25,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=402, Invalid=6252, Unknown=4, NotChecked=652, Total=7310 [2024-11-06 22:29:25,338 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-06 22:29:25,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 486 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-06 22:29:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-06 22:29:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2024-11-06 22:29:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-06 22:29:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2024-11-06 22:29:25,344 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 44 [2024-11-06 22:29:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:29:25,344 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2024-11-06 22:29:25,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 46 states have internal predecessors, (73), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 22:29:25,344 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2024-11-06 22:29:25,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-06 22:29:25,345 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:29:25,345 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-11-06 22:29:25,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-06 22:29:25,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:29:25,545 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:29:25,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:29:25,545 INFO L85 PathProgramCache]: Analyzing trace with hash 478170515, now seen corresponding path program 2 times [2024-11-06 22:29:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:29:25,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913427049] [2024-11-06 22:29:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:29:25,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:29:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:26,496 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 22:29:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:26,556 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-06 22:29:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:26,716 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-06 22:29:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-06 22:29:26,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:29:26,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913427049] [2024-11-06 22:29:26,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913427049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:29:26,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291956849] [2024-11-06 22:29:26,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 22:29:26,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:29:26,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:29:26,850 INFO L229 MonitoredProcess]: Starting monitored process 10 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 22:29:26,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-06 22:29:27,056 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 22:29:27,057 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 22:29:27,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-06 22:29:27,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:29:27,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-06 22:29:27,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-06 22:29:27,338 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 22:29:27,397 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-06 22:29:27,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-06 22:29:27,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-06 22:29:27,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-11-06 22:29:27,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-06 22:29:27,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 22:29:27,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 11 [2024-11-06 22:29:27,543 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-06 22:29:27,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 93 [2024-11-06 22:29:27,553 INFO L349 Elim1Store]: treesize reduction 31, result has 26.2 percent of original size [2024-11-06 22:29:27,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2024-11-06 22:29:27,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-06 22:29:27,780 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 55 treesize of output 31 [2024-11-06 22:29:27,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-06 22:29:27,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-06 22:29:27,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-06 22:29:27,978 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-06 22:29:27,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2024-11-06 22:29:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-06 22:29:27,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 46 [2024-11-06 22:29:28,004 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-06 22:29:28,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-11-06 22:29:28,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2024-11-06 22:29:28,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2024-11-06 22:29:28,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-06 22:29:28,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2024-11-06 22:29:28,489 INFO L349 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2024-11-06 22:29:28,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 1 [2024-11-06 22:29:28,544 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 22:29:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:29:28,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:29:28,764 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2218 (Array Int Int)) (v_ArrVal_2217 (Array Int Int)) (|ULTIMATE.start_dll_append_~last~0#1.base| Int)) (or (= (select (select (store (store |c_#memory_int#1| |ULTIMATE.start_dll_append_~last~0#1.base| v_ArrVal_2217) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2218) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|) (not (= (let ((.cse0 (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (store (select |c_#memory_int#1| |ULTIMATE.start_dll_append_~last~0#1.base|) .cse0 (select v_ArrVal_2217 .cse0))) v_ArrVal_2217)))) is different from false [2024-11-06 22:29:28,781 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2218 (Array Int Int)) (v_ArrVal_2217 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.base_36| Int)) (or (not (= (let ((.cse0 (+ (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4)) 4))) (store (select |c_#memory_int#1| |v_ULTIMATE.start_dll_append_~last~0#1.base_36|) .cse0 (select v_ArrVal_2217 .cse0))) v_ArrVal_2217)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| |v_ULTIMATE.start_dll_append_~last~0#1.base_36| v_ArrVal_2217) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2218) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2024-11-06 22:29:28,798 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2218 (Array Int Int)) (v_ArrVal_2217 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.base_36| Int)) (or (not (= v_ArrVal_2217 (let ((.cse0 (+ (let ((.cse1 (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (select (select |c_#memory_$Pointer$#1.offset| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse1)) (+ (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse1) 4))) 4))) (store (select |c_#memory_int#1| |v_ULTIMATE.start_dll_append_~last~0#1.base_36|) .cse0 (select v_ArrVal_2217 .cse0))))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| |v_ULTIMATE.start_dll_append_~last~0#1.base_36| v_ArrVal_2217) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2218) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2024-11-06 22:29:28,812 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2218 (Array Int Int)) (v_ArrVal_2217 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.base_36| Int)) (or (not (= v_ArrVal_2217 (let ((.cse0 (+ (let ((.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse2 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (select (select |c_#memory_$Pointer$#1.offset| (select (select |c_#memory_$Pointer$#1.base| .cse1) .cse2)) (+ (select (select |c_#memory_$Pointer$#1.offset| .cse1) .cse2) 4))) 4))) (store (select |c_#memory_int#1| |v_ULTIMATE.start_dll_append_~last~0#1.base_36|) .cse0 (select v_ArrVal_2217 .cse0))))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| |v_ULTIMATE.start_dll_append_~last~0#1.base_36| v_ArrVal_2217) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2218) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2024-11-06 22:29:28,823 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2218 (Array Int Int)) (v_ArrVal_2217 (Array Int Int)) (|v_ULTIMATE.start_dll_append_~last~0#1.base_36| Int)) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| |v_ULTIMATE.start_dll_append_~last~0#1.base_36| v_ArrVal_2217) |c_ULTIMATE.start_dll_append_#t~ret7#1.base| v_ArrVal_2218) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (not (= v_ArrVal_2217 (let ((.cse0 (+ (let ((.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse2 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (select (select |c_#memory_$Pointer$#1.offset| (select (select |c_#memory_$Pointer$#1.base| .cse1) .cse2)) (+ (select (select |c_#memory_$Pointer$#1.offset| .cse1) .cse2) 4))) 4))) (store (select |c_#memory_int#1| |v_ULTIMATE.start_dll_append_~last~0#1.base_36|) .cse0 (select v_ArrVal_2217 .cse0))))))) is different from false [2024-11-06 22:29:29,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291956849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:29:29,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 22:29:29,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 50 [2024-11-06 22:29:29,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63991850] [2024-11-06 22:29:29,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 22:29:29,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-06 22:29:29,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:29:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-06 22:29:29,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2717, Unknown=5, NotChecked=540, Total=3422 [2024-11-06 22:29:29,010 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 50 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 42 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 22:29:31,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:29:31,301 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2024-11-06 22:29:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-06 22:29:31,302 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 42 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2024-11-06 22:29:31,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:29:31,302 INFO L225 Difference]: With dead ends: 91 [2024-11-06 22:29:31,302 INFO L226 Difference]: Without dead ends: 79 [2024-11-06 22:29:31,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=391, Invalid=6764, Unknown=5, NotChecked=850, Total=8010 [2024-11-06 22:29:31,304 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-06 22:29:31,304 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 410 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-06 22:29:31,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-06 22:29:31,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2024-11-06 22:29:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-06 22:29:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2024-11-06 22:29:31,315 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 44 [2024-11-06 22:29:31,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:29:31,315 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2024-11-06 22:29:31,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 42 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 22:29:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2024-11-06 22:29:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-06 22:29:31,316 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:29:31,317 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:29:31,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-06 22:29:31,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:29:31,517 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:29:31,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:29:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash -397769244, now seen corresponding path program 1 times [2024-11-06 22:29:31,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:29:31,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462112226] [2024-11-06 22:29:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:29:31,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:29:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:32,920 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 22:29:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:32,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-06 22:29:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:33,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-06 22:29:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-06 22:29:33,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:29:33,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462112226] [2024-11-06 22:29:33,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462112226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:29:33,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069528527] [2024-11-06 22:29:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:29:33,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:29:33,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:29:33,220 INFO L229 MonitoredProcess]: Starting monitored process 11 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 22:29:33,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-06 22:29:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:33,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-06 22:29:33,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:29:33,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-06 22:29:34,140 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-06 22:29:34,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-06 22:29:34,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 22:29:34,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 22:29:34,265 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-06 22:29:34,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-11-06 22:29:34,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-11-06 22:29:34,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-06 22:29:34,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-06 22:29:34,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-06 22:29:34,680 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-06 22:29:34,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2024-11-06 22:29:34,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-06 22:29:34,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 27 [2024-11-06 22:29:34,702 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-06 22:29:34,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2024-11-06 22:29:35,087 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-11-06 22:29:35,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 55 [2024-11-06 22:29:35,104 INFO L349 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2024-11-06 22:29:35,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 162 treesize of output 89 [2024-11-06 22:29:35,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 15 [2024-11-06 22:29:35,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 51 [2024-11-06 22:29:35,255 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 7 treesize of output 3 [2024-11-06 22:29:35,323 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-06 22:29:35,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 23 [2024-11-06 22:29:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-06 22:29:35,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-06 22:29:35,490 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2472 (Array Int Int)) (v_ArrVal_2471 (Array Int Int)) (v_ArrVal_2470 (Array Int Int))) (not (= (let ((.cse4 (+ |c_ULTIMATE.start_dll_append_~last~0#1.offset| 4))) (let ((.cse3 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse4)) (.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (let ((.cse0 (store (store |c_#memory_$Pointer$#1.base| .cse3 (store (select |c_#memory_$Pointer$#1.base| .cse3) (+ (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_append_~last~0#1.base|) .cse4) 4) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2470))) (select .cse0 (select (select .cse0 .cse1) .cse2))) (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse3 v_ArrVal_2472) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2471) .cse1) .cse2) 4)))) 0))) is different from false [2024-11-06 22:29:35,499 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2472 (Array Int Int)) (v_ArrVal_2471 (Array Int Int)) (v_ArrVal_2470 (Array Int Int))) (not (= (let ((.cse4 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|)) (.cse5 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_dll_append_~head#1.base|) |c_ULTIMATE.start_dll_append_~head#1.offset|) 4))) (let ((.cse3 (select (select |c_#memory_$Pointer$#1.base| .cse4) .cse5)) (.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (select (let ((.cse0 (store (store |c_#memory_$Pointer$#1.base| .cse3 (store (select |c_#memory_$Pointer$#1.base| .cse3) (+ (select (select |c_#memory_$Pointer$#1.offset| .cse4) .cse5) 4) |c_ULTIMATE.start_dll_append_~new_last~0#1.base|)) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2470))) (select .cse0 (select (select .cse0 .cse1) .cse2))) (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse3 v_ArrVal_2472) |c_ULTIMATE.start_dll_append_~new_last~0#1.base| v_ArrVal_2471) .cse1) .cse2) 4)))) 0))) is different from false [2024-11-06 22:29:35,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069528527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:29:35,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-06 22:29:35,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 54 [2024-11-06 22:29:35,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930410405] [2024-11-06 22:29:35,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-06 22:29:35,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-06 22:29:35,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-06 22:29:35,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-06 22:29:35,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3260, Unknown=5, NotChecked=230, Total=3660 [2024-11-06 22:29:35,785 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 54 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 45 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 22:29:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-06 22:29:37,647 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2024-11-06 22:29:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-06 22:29:37,648 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 45 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2024-11-06 22:29:37,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-06 22:29:37,648 INFO L225 Difference]: With dead ends: 82 [2024-11-06 22:29:37,648 INFO L226 Difference]: Without dead ends: 79 [2024-11-06 22:29:37,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=391, Invalid=6752, Unknown=5, NotChecked=334, Total=7482 [2024-11-06 22:29:37,650 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-06 22:29:37,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 493 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-06 22:29:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-06 22:29:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2024-11-06 22:29:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-06 22:29:37,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2024-11-06 22:29:37,659 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 46 [2024-11-06 22:29:37,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-06 22:29:37,659 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2024-11-06 22:29:37,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 45 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-06 22:29:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2024-11-06 22:29:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-06 22:29:37,660 INFO L207 NwaCegarLoop]: Found error trace [2024-11-06 22:29:37,660 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-06 22:29:37,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-06 22:29:37,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-06 22:29:37,860 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-06 22:29:37,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-06 22:29:37,860 INFO L85 PathProgramCache]: Analyzing trace with hash -397767570, now seen corresponding path program 2 times [2024-11-06 22:29:37,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-06 22:29:37,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172747908] [2024-11-06 22:29:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-06 22:29:37,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-06 22:29:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:39,270 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-06 22:29:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:39,329 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-06 22:29:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:39,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-06 22:29:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-06 22:29:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-06 22:29:39,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-06 22:29:39,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172747908] [2024-11-06 22:29:39,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172747908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-06 22:29:39,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650522782] [2024-11-06 22:29:39,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-06 22:29:39,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-06 22:29:39,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-06 22:29:39,600 INFO L229 MonitoredProcess]: Starting monitored process 12 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 22:29:39,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-06 22:29:39,792 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-06 22:29:39,792 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-06 22:29:39,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 148 conjuncts are in the unsatisfiable core [2024-11-06 22:29:39,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-06 22:29:39,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-06 22:29:39,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 22:29:39,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-06 22:29:40,155 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-06 22:29:40,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-06 22:29:40,168 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-06 22:29:40,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-06 22:29:40,181 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-06 22:29:40,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-06 22:29:40,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2024-11-06 22:29:40,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-06 22:29:40,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2024-11-06 22:29:40,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-06 22:29:40,320 INFO L349 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2024-11-06 22:29:40,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 69 [2024-11-06 22:29:40,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 29 [2024-11-06 22:29:40,573 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2024-11-06 22:29:40,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 31 [2024-11-06 22:29:40,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2024-11-06 22:29:40,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-06 22:29:40,602 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 22:29:40,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-06 22:29:40,685 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-11-06 22:29:40,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 69 [2024-11-06 22:29:40,700 INFO L349 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2024-11-06 22:29:40,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2024-11-06 22:29:40,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 59 [2024-11-06 22:29:41,326 INFO L349 Elim1Store]: treesize reduction 284, result has 22.2 percent of original size [2024-11-06 22:29:41,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 191 treesize of output 119 [2024-11-06 22:29:41,385 INFO L349 Elim1Store]: treesize reduction 328, result has 19.4 percent of original size [2024-11-06 22:29:41,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 129 treesize of output 94 [2024-11-06 22:29:41,411 INFO L349 Elim1Store]: treesize reduction 50, result has 41.2 percent of original size [2024-11-06 22:29:41,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 109 [2024-11-06 22:29:41,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2024-11-06 22:29:41,441 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-06 22:29:41,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 20 [2024-11-06 22:29:42,025 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 567 treesize of output 499 [2024-11-06 22:29:42,032 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 503 treesize of output 459