./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 31cf2fabf53e081c3004f39943d7e98ce7bd9dc5e02db94d5bcffe73b0927449 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 03:08:33,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 03:08:33,749 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 03:08:33,754 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 03:08:33,755 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 03:08:33,771 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 03:08:33,771 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 03:08:33,771 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 03:08:33,772 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 03:08:33,772 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 03:08:33,772 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 03:08:33,773 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 03:08:33,773 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 03:08:33,773 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 03:08:33,774 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 03:08:33,774 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 03:08:33,774 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 03:08:33,774 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 03:08:33,775 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 03:08:33,775 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 03:08:33,775 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 03:08:33,776 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 03:08:33,776 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 03:08:33,776 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 03:08:33,777 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 03:08:33,777 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 03:08:33,777 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 03:08:33,777 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 03:08:33,778 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 03:08:33,778 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 03:08:33,778 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 03:08:33,779 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 03:08:33,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 03:08:33,779 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 03:08:33,779 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 03:08:33,780 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 03:08:33,780 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 03:08:33,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 03:08:33,780 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 03:08:33,780 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 03:08:33,781 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 03:08:33,788 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 03:08:33,788 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31cf2fabf53e081c3004f39943d7e98ce7bd9dc5e02db94d5bcffe73b0927449 [2024-10-11 03:08:34,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 03:08:34,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 03:08:34,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 03:08:34,109 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 03:08:34,109 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 03:08:34,110 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2024-10-11 03:08:35,462 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 03:08:35,680 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 03:08:35,681 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2024-10-11 03:08:35,690 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/dbe8ec25b/efa2b070c375482a86a4c4bb17e970e7/FLAG26c1813df [2024-10-11 03:08:35,705 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/dbe8ec25b/efa2b070c375482a86a4c4bb17e970e7 [2024-10-11 03:08:35,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 03:08:35,708 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 03:08:35,709 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 03:08:35,710 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 03:08:35,714 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 03:08:35,715 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:35,715 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d3829e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35, skipping insertion in model container [2024-10-11 03:08:35,716 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:35,733 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 03:08:35,873 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c[1052,1065] [2024-10-11 03:08:35,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 03:08:35,906 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 03:08:35,916 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c[1052,1065] [2024-10-11 03:08:35,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 03:08:35,943 INFO L204 MainTranslator]: Completed translation [2024-10-11 03:08:35,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35 WrapperNode [2024-10-11 03:08:35,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 03:08:35,944 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 03:08:35,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 03:08:35,944 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 03:08:35,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:35,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:35,978 INFO L138 Inliner]: procedures = 18, calls = 127, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 95 [2024-10-11 03:08:35,979 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 03:08:35,979 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 03:08:35,979 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 03:08:35,979 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 03:08:35,992 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:35,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:35,997 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:36,030 INFO L175 MemorySlicer]: Split 77 memory accesses to 13 slices as follows [2, 5, 7, 6, 5, 6, 6, 7, 7, 9, 6, 5, 6]. 12 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. The 22 writes are split as follows [0, 2, 2, 2, 2, 2, 2, 1, 1, 2, 2, 2, 2]. [2024-10-11 03:08:36,031 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:36,031 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:36,043 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:36,046 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:36,048 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:36,053 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:36,056 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 03:08:36,060 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 03:08:36,060 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 03:08:36,061 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 03:08:36,061 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (1/1) ... [2024-10-11 03:08:36,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 03:08:36,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:36,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 03:08:36,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 03:08:36,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 03:08:36,140 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-11 03:08:36,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-11 03:08:36,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 03:08:36,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 03:08:36,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 03:08:36,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 03:08:36,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-11 03:08:36,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-11 03:08:36,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-11 03:08:36,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-11 03:08:36,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-10-11 03:08:36,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-10-11 03:08:36,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-10-11 03:08:36,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-10-11 03:08:36,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-10-11 03:08:36,142 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_47_to_56_0 [2024-10-11 03:08:36,142 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_47_to_56_0 [2024-10-11 03:08:36,142 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_70_0 [2024-10-11 03:08:36,142 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_70_0 [2024-10-11 03:08:36,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 03:08:36,142 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_59_0 [2024-10-11 03:08:36,142 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_59_0 [2024-10-11 03:08:36,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 03:08:36,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 03:08:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 03:08:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 03:08:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-11 03:08:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-11 03:08:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-11 03:08:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-11 03:08:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-10-11 03:08:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-10-11 03:08:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-10-11 03:08:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-10-11 03:08:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-10-11 03:08:36,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 03:08:36,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 03:08:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 03:08:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 03:08:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 03:08:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 03:08:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-11 03:08:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-11 03:08:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-11 03:08:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-11 03:08:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-10-11 03:08:36,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-10-11 03:08:36,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-10-11 03:08:36,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-10-11 03:08:36,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-10-11 03:08:36,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 03:08:36,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 03:08:36,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 03:08:36,308 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 03:08:36,311 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 03:08:36,640 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-10-11 03:08:36,641 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 03:08:36,675 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 03:08:36,676 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 03:08:36,676 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 03:08:36 BoogieIcfgContainer [2024-10-11 03:08:36,676 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 03:08:36,678 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 03:08:36,678 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 03:08:36,682 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 03:08:36,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 03:08:35" (1/3) ... [2024-10-11 03:08:36,683 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8e8312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 03:08:36, skipping insertion in model container [2024-10-11 03:08:36,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:35" (2/3) ... [2024-10-11 03:08:36,683 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8e8312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 03:08:36, skipping insertion in model container [2024-10-11 03:08:36,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 03:08:36" (3/3) ... [2024-10-11 03:08:36,684 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd3-ll.c [2024-10-11 03:08:36,699 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 03:08:36,699 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 03:08:36,755 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 03:08:36,760 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;@6dbebe64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 03:08:36,760 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 03:08:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 30 states have (on average 1.3) internal successors, (39), 34 states have internal predecessors, (39), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-11 03:08:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-11 03:08:36,768 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:36,769 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:36,769 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:36,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:36,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1622724067, now seen corresponding path program 1 times [2024-10-11 03:08:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:36,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686214431] [2024-10-11 03:08:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:36,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:37,009 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:08:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:37,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 03:08:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:37,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-11 03:08:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 03:08:37,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:37,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686214431] [2024-10-11 03:08:37,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686214431] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:08:37,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:08:37,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 03:08:37,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084993614] [2024-10-11 03:08:37,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:08:37,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 03:08:37,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:37,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 03:08:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 03:08:37,138 INFO L87 Difference]: Start difference. First operand has 50 states, 30 states have (on average 1.3) internal successors, (39), 34 states have internal predecessors, (39), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 03:08:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:37,356 INFO L93 Difference]: Finished difference Result 104 states and 149 transitions. [2024-10-11 03:08:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 03:08:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-10-11 03:08:37,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:37,368 INFO L225 Difference]: With dead ends: 104 [2024-10-11 03:08:37,368 INFO L226 Difference]: Without dead ends: 54 [2024-10-11 03:08:37,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 03:08:37,376 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:37,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 28 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 03:08:37,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-11 03:08:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2024-10-11 03:08:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 33 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 03:08:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2024-10-11 03:08:37,422 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 23 [2024-10-11 03:08:37,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:37,422 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2024-10-11 03:08:37,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 03:08:37,423 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2024-10-11 03:08:37,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-11 03:08:37,424 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:37,424 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:37,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 03:08:37,425 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:37,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:37,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1864870065, now seen corresponding path program 1 times [2024-10-11 03:08:37,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:37,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389346669] [2024-10-11 03:08:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:37,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:37,786 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:08:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:37,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 03:08:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:37,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-11 03:08:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 03:08:37,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:37,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389346669] [2024-10-11 03:08:37,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389346669] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:08:37,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:08:37,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-11 03:08:37,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456368998] [2024-10-11 03:08:37,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:08:37,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 03:08:37,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:37,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 03:08:37,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-10-11 03:08:37,933 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 03:08:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:38,542 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-10-11 03:08:38,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 03:08:38,543 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-10-11 03:08:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:38,544 INFO L225 Difference]: With dead ends: 62 [2024-10-11 03:08:38,546 INFO L226 Difference]: Without dead ends: 54 [2024-10-11 03:08:38,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-10-11 03:08:38,547 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:38,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 86 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 03:08:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-11 03:08:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-10-11 03:08:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 34 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2024-10-11 03:08:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-10-11 03:08:38,569 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 24 [2024-10-11 03:08:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:38,569 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-10-11 03:08:38,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 03:08:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-10-11 03:08:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-11 03:08:38,571 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:38,571 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:38,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 03:08:38,571 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:38,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash -176414272, now seen corresponding path program 1 times [2024-10-11 03:08:38,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:38,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509904604] [2024-10-11 03:08:38,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:38,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:38,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817126258] [2024-10-11 03:08:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:38,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:38,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:38,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:08:38,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 03:08:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:38,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 199 conjuncts are in the unsatisfiable core [2024-10-11 03:08:38,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:38,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:08:38,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:08:38,957 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 [2024-10-11 03:08:38,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:08:38,974 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 [2024-10-11 03:08:38,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:08:39,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:08:39,303 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 [2024-10-11 03:08:39,312 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 [2024-10-11 03:08:39,483 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 26 treesize of output 14 [2024-10-11 03:08:39,490 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 26 treesize of output 14 [2024-10-11 03:08:39,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-10-11 03:08:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 03:08:39,558 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 03:08:39,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:39,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509904604] [2024-10-11 03:08:39,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:39,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817126258] [2024-10-11 03:08:39,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817126258] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:08:39,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:08:39,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2024-10-11 03:08:39,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655281890] [2024-10-11 03:08:39,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:08:39,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 03:08:39,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 03:08:39,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2024-10-11 03:08:39,561 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 03:08:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:40,701 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2024-10-11 03:08:40,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 03:08:40,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-10-11 03:08:40,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:40,703 INFO L225 Difference]: With dead ends: 88 [2024-10-11 03:08:40,703 INFO L226 Difference]: Without dead ends: 84 [2024-10-11 03:08:40,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2024-10-11 03:08:40,705 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:40,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 413 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-11 03:08:40,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-11 03:08:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2024-10-11 03:08:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 55 states have internal predecessors, (55), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2024-10-11 03:08:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2024-10-11 03:08:40,745 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 28 [2024-10-11 03:08:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:40,745 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2024-10-11 03:08:40,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 03:08:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2024-10-11 03:08:40,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-11 03:08:40,746 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:40,746 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:40,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 03:08:40,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:40,948 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:40,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:40,948 INFO L85 PathProgramCache]: Analyzing trace with hash -466915291, now seen corresponding path program 1 times [2024-10-11 03:08:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:40,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203601227] [2024-10-11 03:08:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:41,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490214801] [2024-10-11 03:08:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:41,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:41,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:41,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:08:41,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 03:08:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:41,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-10-11 03:08:41,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:41,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:08:41,225 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 [2024-10-11 03:08:41,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:08:41,244 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 [2024-10-11 03:08:41,566 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 [2024-10-11 03:08:41,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 03:08:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 03:08:41,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:08:41,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:41,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203601227] [2024-10-11 03:08:41,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:41,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490214801] [2024-10-11 03:08:41,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490214801] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:08:41,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:08:41,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-10-11 03:08:41,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987922924] [2024-10-11 03:08:41,743 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:08:41,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 03:08:41,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:41,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 03:08:41,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-11 03:08:41,745 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 03:08:42,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:42,184 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2024-10-11 03:08:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 03:08:42,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2024-10-11 03:08:42,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:42,186 INFO L225 Difference]: With dead ends: 115 [2024-10-11 03:08:42,186 INFO L226 Difference]: Without dead ends: 113 [2024-10-11 03:08:42,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-10-11 03:08:42,187 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 42 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:42,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 308 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 03:08:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-11 03:08:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2024-10-11 03:08:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 76 states have internal predecessors, (77), 28 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2024-10-11 03:08:42,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2024-10-11 03:08:42,206 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 34 [2024-10-11 03:08:42,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:42,206 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2024-10-11 03:08:42,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 03:08:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2024-10-11 03:08:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-11 03:08:42,207 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:42,207 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:42,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 03:08:42,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:42,410 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:42,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:42,410 INFO L85 PathProgramCache]: Analyzing trace with hash 212011526, now seen corresponding path program 1 times [2024-10-11 03:08:42,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:42,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549272869] [2024-10-11 03:08:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:42,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:42,845 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:08:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:42,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 03:08:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:42,892 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-11 03:08:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:43,182 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-11 03:08:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:43,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-11 03:08:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 03:08:43,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:43,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549272869] [2024-10-11 03:08:43,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549272869] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:08:43,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711209023] [2024-10-11 03:08:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:43,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:43,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:43,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:08:43,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 03:08:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:43,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-11 03:08:43,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:43,518 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 [2024-10-11 03:08:43,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:08:43,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:08:43,605 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 27 treesize of output 19 [2024-10-11 03:08:43,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:08:43,709 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 [2024-10-11 03:08:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 03:08:43,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:08:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 03:08:44,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711209023] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 03:08:44,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 03:08:44,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 40 [2024-10-11 03:08:44,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359954600] [2024-10-11 03:08:44,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 03:08:44,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-11 03:08:44,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:44,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-11 03:08:44,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2024-10-11 03:08:44,375 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand has 40 states, 32 states have (on average 1.78125) internal successors, (57), 34 states have internal predecessors, (57), 14 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (14), 8 states have call predecessors, (14), 13 states have call successors, (14) [2024-10-11 03:08:48,466 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] [2024-10-11 03:08:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:49,663 INFO L93 Difference]: Finished difference Result 138 states and 168 transitions. [2024-10-11 03:08:49,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 03:08:49,664 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 32 states have (on average 1.78125) internal successors, (57), 34 states have internal predecessors, (57), 14 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (14), 8 states have call predecessors, (14), 13 states have call successors, (14) Word has length 37 [2024-10-11 03:08:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:49,667 INFO L225 Difference]: With dead ends: 138 [2024-10-11 03:08:49,667 INFO L226 Difference]: Without dead ends: 130 [2024-10-11 03:08:49,668 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=364, Invalid=2828, Unknown=0, NotChecked=0, Total=3192 [2024-10-11 03:08:49,669 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 100 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 84 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:49,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 71 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 948 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2024-10-11 03:08:49,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-11 03:08:49,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2024-10-11 03:08:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.12) internal successors, (84), 83 states have internal predecessors, (84), 29 states have call successors, (29), 14 states have call predecessors, (29), 17 states have return successors, (35), 28 states have call predecessors, (35), 28 states have call successors, (35) [2024-10-11 03:08:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 148 transitions. [2024-10-11 03:08:49,699 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 148 transitions. Word has length 37 [2024-10-11 03:08:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:49,700 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 148 transitions. [2024-10-11 03:08:49,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 32 states have (on average 1.78125) internal successors, (57), 34 states have internal predecessors, (57), 14 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (14), 8 states have call predecessors, (14), 13 states have call successors, (14) [2024-10-11 03:08:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 148 transitions. [2024-10-11 03:08:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-11 03:08:49,702 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:49,702 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:49,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 03:08:49,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:49,907 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:49,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:49,907 INFO L85 PathProgramCache]: Analyzing trace with hash 451765875, now seen corresponding path program 1 times [2024-10-11 03:08:49,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:49,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429051655] [2024-10-11 03:08:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:49,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:49,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905517002] [2024-10-11 03:08:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:49,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:49,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:49,983 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:08:49,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 03:08:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:50,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 251 conjuncts are in the unsatisfiable core [2024-10-11 03:08:50,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:50,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:08:50,334 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 [2024-10-11 03:08:50,338 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 15 treesize of output 1 [2024-10-11 03:08:50,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:08:50,345 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 [2024-10-11 03:08:50,349 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 [2024-10-11 03:08:50,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:08:50,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 03:08:50,969 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-10-11 03:08:50,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 73 [2024-10-11 03:08:51,021 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-10-11 03:08:51,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 52 [2024-10-11 03:08:51,036 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 32 treesize of output 20 [2024-10-11 03:08:51,108 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 [2024-10-11 03:08:51,116 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 [2024-10-11 03:08:51,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:08:51,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 140 [2024-10-11 03:08:51,910 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 [2024-10-11 03:08:51,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-10-11 03:08:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 03:08:51,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:08:53,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:53,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429051655] [2024-10-11 03:08:53,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:53,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905517002] [2024-10-11 03:08:53,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905517002] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:08:53,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:08:53,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-10-11 03:08:53,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400927484] [2024-10-11 03:08:53,237 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:08:53,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-11 03:08:53,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:53,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-11 03:08:53,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2024-10-11 03:08:53,239 INFO L87 Difference]: Start difference. First operand 122 states and 148 transitions. Second operand has 28 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 19 states have internal predecessors, (28), 8 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 03:08:57,308 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] [2024-10-11 03:09:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:00,227 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2024-10-11 03:09:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-11 03:09:00,228 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 19 states have internal predecessors, (28), 8 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2024-10-11 03:09:00,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:00,230 INFO L225 Difference]: With dead ends: 175 [2024-10-11 03:09:00,230 INFO L226 Difference]: Without dead ends: 169 [2024-10-11 03:09:00,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=246, Invalid=3060, Unknown=0, NotChecked=0, Total=3306 [2024-10-11 03:09:00,231 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 165 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 68 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:00,231 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 449 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1484 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-10-11 03:09:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-10-11 03:09:00,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2024-10-11 03:09:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 112 states have internal predecessors, (114), 38 states have call successors, (38), 20 states have call predecessors, (38), 23 states have return successors, (47), 36 states have call predecessors, (47), 37 states have call successors, (47) [2024-10-11 03:09:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 199 transitions. [2024-10-11 03:09:00,272 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 199 transitions. Word has length 39 [2024-10-11 03:09:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:00,272 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 199 transitions. [2024-10-11 03:09:00,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 19 states have internal predecessors, (28), 8 states have call successors, (8), 8 states have call predecessors, (8), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-11 03:09:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 199 transitions. [2024-10-11 03:09:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-11 03:09:00,273 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:00,273 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:00,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 03:09:00,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 03:09:00,474 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:00,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:00,474 INFO L85 PathProgramCache]: Analyzing trace with hash -603691064, now seen corresponding path program 1 times [2024-10-11 03:09:00,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:00,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893141448] [2024-10-11 03:09:00,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:00,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:00,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908646207] [2024-10-11 03:09:00,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:00,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:00,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:00,511 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:09:00,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 03:09:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:00,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-10-11 03:09:00,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:00,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:09:00,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:00,688 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 [2024-10-11 03:09:00,956 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 [2024-10-11 03:09:00,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 03:09:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 03:09:01,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 03:09:01,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:01,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893141448] [2024-10-11 03:09:01,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:01,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908646207] [2024-10-11 03:09:01,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908646207] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 03:09:01,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:09:01,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2024-10-11 03:09:01,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826601712] [2024-10-11 03:09:01,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:09:01,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 03:09:01,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:01,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 03:09:01,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-10-11 03:09:01,140 INFO L87 Difference]: Start difference. First operand 164 states and 199 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 03:09:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:01,401 INFO L93 Difference]: Finished difference Result 216 states and 262 transitions. [2024-10-11 03:09:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 03:09:01,402 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-10-11 03:09:01,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:01,404 INFO L225 Difference]: With dead ends: 216 [2024-10-11 03:09:01,404 INFO L226 Difference]: Without dead ends: 214 [2024-10-11 03:09:01,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-10-11 03:09:01,405 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 25 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:01,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 346 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 03:09:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-10-11 03:09:01,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2024-10-11 03:09:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 132 states have (on average 1.121212121212121) internal successors, (148), 146 states have internal predecessors, (148), 50 states have call successors, (50), 26 states have call predecessors, (50), 29 states have return successors, (59), 46 states have call predecessors, (59), 49 states have call successors, (59) [2024-10-11 03:09:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 257 transitions. [2024-10-11 03:09:01,439 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 257 transitions. Word has length 40 [2024-10-11 03:09:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:01,439 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 257 transitions. [2024-10-11 03:09:01,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 03:09:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 257 transitions. [2024-10-11 03:09:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-11 03:09:01,442 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:01,443 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:01,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 03:09:01,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:01,644 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:01,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:01,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1785388392, now seen corresponding path program 1 times [2024-10-11 03:09:01,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:01,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477390814] [2024-10-11 03:09:01,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:01,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:01,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281930557] [2024-10-11 03:09:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:01,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:01,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:01,697 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:09:01,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 03:09:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:02,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 262 conjuncts are in the unsatisfiable core [2024-10-11 03:09:02,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:02,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:09:02,088 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 [2024-10-11 03:09:02,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:02,097 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 [2024-10-11 03:09:02,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 03:09:02,109 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 [2024-10-11 03:09:02,209 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 [2024-10-11 03:09:02,215 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 27 treesize of output 19 [2024-10-11 03:09:02,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:02,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 03:09:02,413 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 [2024-10-11 03:09:02,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:09:02,421 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 [2024-10-11 03:09:02,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:09:02,427 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 27 treesize of output 19 [2024-10-11 03:09:02,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:02,787 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 [2024-10-11 03:09:02,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-10-11 03:09:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 03:09:02,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:03,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:03,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477390814] [2024-10-11 03:09:03,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:03,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281930557] [2024-10-11 03:09:03,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281930557] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:09:03,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:09:03,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-10-11 03:09:03,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220724029] [2024-10-11 03:09:03,006 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:09:03,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 03:09:03,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:03,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 03:09:03,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2024-10-11 03:09:03,007 INFO L87 Difference]: Start difference. First operand 212 states and 257 transitions. Second operand has 23 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-11 03:09:07,052 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] [2024-10-11 03:09:08,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:08,527 INFO L93 Difference]: Finished difference Result 233 states and 274 transitions. [2024-10-11 03:09:08,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 03:09:08,527 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2024-10-11 03:09:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:08,529 INFO L225 Difference]: With dead ends: 233 [2024-10-11 03:09:08,530 INFO L226 Difference]: Without dead ends: 231 [2024-10-11 03:09:08,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 03:09:08,531 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 119 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:08,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 451 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1127 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2024-10-11 03:09:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-10-11 03:09:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 224. [2024-10-11 03:09:08,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 141 states have (on average 1.1205673758865249) internal successors, (158), 155 states have internal predecessors, (158), 50 states have call successors, (50), 29 states have call predecessors, (50), 32 states have return successors, (59), 46 states have call predecessors, (59), 49 states have call successors, (59) [2024-10-11 03:09:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 267 transitions. [2024-10-11 03:09:08,564 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 267 transitions. Word has length 45 [2024-10-11 03:09:08,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:08,564 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 267 transitions. [2024-10-11 03:09:08,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-11 03:09:08,564 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 267 transitions. [2024-10-11 03:09:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-11 03:09:08,565 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:08,565 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:08,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 03:09:08,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 03:09:08,767 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:08,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1730585129, now seen corresponding path program 1 times [2024-10-11 03:09:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:08,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888673782] [2024-10-11 03:09:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:08,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037182476] [2024-10-11 03:09:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:08,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:08,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:08,805 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:09:08,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 03:09:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:09,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-11 03:09:09,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:09,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:09,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:09:09,040 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 [2024-10-11 03:09:09,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:09,212 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 [2024-10-11 03:09:09,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 03:09:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 03:09:09,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 03:09:09,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:09,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888673782] [2024-10-11 03:09:09,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:09,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037182476] [2024-10-11 03:09:09,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037182476] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 03:09:09,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:09:09,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-10-11 03:09:09,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949837746] [2024-10-11 03:09:09,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:09:09,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 03:09:09,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:09,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 03:09:09,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-10-11 03:09:09,334 INFO L87 Difference]: Start difference. First operand 224 states and 267 transitions. Second operand has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-11 03:09:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:09,529 INFO L93 Difference]: Finished difference Result 266 states and 320 transitions. [2024-10-11 03:09:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 03:09:09,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2024-10-11 03:09:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:09,531 INFO L225 Difference]: With dead ends: 266 [2024-10-11 03:09:09,531 INFO L226 Difference]: Without dead ends: 264 [2024-10-11 03:09:09,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-10-11 03:09:09,532 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 16 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:09,532 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 279 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 03:09:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-10-11 03:09:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 236. [2024-10-11 03:09:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 150 states have (on average 1.1066666666666667) internal successors, (166), 164 states have internal predecessors, (166), 50 states have call successors, (50), 32 states have call predecessors, (50), 35 states have return successors, (59), 46 states have call predecessors, (59), 49 states have call successors, (59) [2024-10-11 03:09:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 275 transitions. [2024-10-11 03:09:09,571 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 275 transitions. Word has length 46 [2024-10-11 03:09:09,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:09,572 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 275 transitions. [2024-10-11 03:09:09,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-11 03:09:09,572 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 275 transitions. [2024-10-11 03:09:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-11 03:09:09,573 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:09,573 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:09,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 03:09:09,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:09,773 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:09,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:09,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1711293408, now seen corresponding path program 2 times [2024-10-11 03:09:09,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:09,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419387149] [2024-10-11 03:09:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:09,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:10,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:09:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:10,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 03:09:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:11,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-11 03:09:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:11,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-11 03:09:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 03:09:11,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:11,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419387149] [2024-10-11 03:09:11,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419387149] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:09:11,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716531572] [2024-10-11 03:09:11,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 03:09:11,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:11,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:11,157 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:09:11,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 03:09:11,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 03:09:11,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:09:11,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-10-11 03:09:11,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:11,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:09:11,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:11,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:09:11,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:11,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:09:11,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:11,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 03:09:11,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-10-11 03:09:11,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-10-11 03:09:11,727 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 25 treesize of output 17 [2024-10-11 03:09:11,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:09:11,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-10-11 03:09:11,844 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 13 treesize of output 9 [2024-10-11 03:09:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 03:09:11,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 03:09:12,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716531572] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 03:09:12,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 03:09:12,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2024-10-11 03:09:12,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399671163] [2024-10-11 03:09:12,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 03:09:12,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-11 03:09:12,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:12,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-11 03:09:12,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2024-10-11 03:09:12,419 INFO L87 Difference]: Start difference. First operand 236 states and 275 transitions. Second operand has 34 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 24 states have internal predecessors, (58), 10 states have call successors, (19), 9 states have call predecessors, (19), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-11 03:09:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:13,864 INFO L93 Difference]: Finished difference Result 323 states and 388 transitions. [2024-10-11 03:09:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 03:09:13,865 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 24 states have internal predecessors, (58), 10 states have call successors, (19), 9 states have call predecessors, (19), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 50 [2024-10-11 03:09:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:13,866 INFO L225 Difference]: With dead ends: 323 [2024-10-11 03:09:13,866 INFO L226 Difference]: Without dead ends: 245 [2024-10-11 03:09:13,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=274, Invalid=2078, Unknown=0, NotChecked=0, Total=2352 [2024-10-11 03:09:13,868 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:13,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 163 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-11 03:09:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-10-11 03:09:13,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 228. [2024-10-11 03:09:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 146 states have (on average 1.095890410958904) internal successors, (160), 158 states have internal predecessors, (160), 49 states have call successors, (49), 32 states have call predecessors, (49), 32 states have return successors, (52), 44 states have call predecessors, (52), 48 states have call successors, (52) [2024-10-11 03:09:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 261 transitions. [2024-10-11 03:09:13,918 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 261 transitions. Word has length 50 [2024-10-11 03:09:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:13,918 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 261 transitions. [2024-10-11 03:09:13,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 24 states have internal predecessors, (58), 10 states have call successors, (19), 9 states have call predecessors, (19), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-11 03:09:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 261 transitions. [2024-10-11 03:09:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-11 03:09:13,919 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:13,919 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:13,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 03:09:14,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 03:09:14,124 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:14,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1015102913, now seen corresponding path program 1 times [2024-10-11 03:09:14,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:14,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255033046] [2024-10-11 03:09:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:14,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:15,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:09:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:15,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 03:09:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:15,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 03:09:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:15,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:09:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:15,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:09:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:15,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-11 03:09:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:15,237 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-11 03:09:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 03:09:15,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:15,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255033046] [2024-10-11 03:09:15,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255033046] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:09:15,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:09:15,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-10-11 03:09:15,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396980042] [2024-10-11 03:09:15,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:09:15,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 03:09:15,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:15,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 03:09:15,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-10-11 03:09:15,243 INFO L87 Difference]: Start difference. First operand 228 states and 261 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 6 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-11 03:09:15,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:15,766 INFO L93 Difference]: Finished difference Result 417 states and 498 transitions. [2024-10-11 03:09:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 03:09:15,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 6 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 63 [2024-10-11 03:09:15,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:15,769 INFO L225 Difference]: With dead ends: 417 [2024-10-11 03:09:15,769 INFO L226 Difference]: Without dead ends: 273 [2024-10-11 03:09:15,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-10-11 03:09:15,770 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:15,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 211 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 03:09:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-10-11 03:09:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 263. [2024-10-11 03:09:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 168 states have (on average 1.0833333333333333) internal successors, (182), 180 states have internal predecessors, (182), 53 states have call successors, (53), 35 states have call predecessors, (53), 41 states have return successors, (68), 48 states have call predecessors, (68), 52 states have call successors, (68) [2024-10-11 03:09:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 303 transitions. [2024-10-11 03:09:15,825 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 303 transitions. Word has length 63 [2024-10-11 03:09:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:15,825 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 303 transitions. [2024-10-11 03:09:15,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 6 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-11 03:09:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 303 transitions. [2024-10-11 03:09:15,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-11 03:09:15,826 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:15,826 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:15,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 03:09:15,826 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:15,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:15,826 INFO L85 PathProgramCache]: Analyzing trace with hash 861698770, now seen corresponding path program 1 times [2024-10-11 03:09:15,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:15,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091475695] [2024-10-11 03:09:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:15,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:15,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396578922] [2024-10-11 03:09:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:15,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:15,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:15,905 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:09:15,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 03:09:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:16,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 238 conjuncts are in the unsatisfiable core [2024-10-11 03:09:16,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:16,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 03:09:16,204 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 [2024-10-11 03:09:16,211 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 [2024-10-11 03:09:16,217 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 [2024-10-11 03:09:16,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:16,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:16,240 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 [2024-10-11 03:09:16,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 03:09:16,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 03:09:16,578 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 [2024-10-11 03:09:16,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:16,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 03:09:16,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-11 03:09:16,935 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 [2024-10-11 03:09:17,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 03:09:21,793 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 50 treesize of output 38 [2024-10-11 03:09:25,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:09:25,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2024-10-11 03:09:30,319 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-10-11 03:09:30,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 73 [2024-10-11 03:09:30,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:09:34,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:09:34,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 97 [2024-10-11 03:09:44,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:09:44,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:09:44,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:09:44,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:09:44,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 53 [2024-10-11 03:09:44,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2024-10-11 03:09:44,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-10-11 03:09:44,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-10-11 03:09:44,187 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 33 treesize of output 17 [2024-10-11 03:09:44,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:09:44,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2024-10-11 03:09:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-11 03:09:44,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:51,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:51,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091475695] [2024-10-11 03:09:51,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:51,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396578922] [2024-10-11 03:09:51,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396578922] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:09:51,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:09:51,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2024-10-11 03:09:51,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857457448] [2024-10-11 03:09:51,909 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:09:51,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-11 03:09:51,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:51,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-11 03:09:51,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1486, Unknown=5, NotChecked=0, Total=1640 [2024-10-11 03:09:51,910 INFO L87 Difference]: Start difference. First operand 263 states and 303 transitions. Second operand has 34 states, 28 states have (on average 1.5) internal successors, (42), 26 states have internal predecessors, (42), 9 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2024-10-11 03:09:55,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 03:10:00,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 03:10:04,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 03:10:08,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]