./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 8d0e6bdf4ddc5b5e0cadfb452142b6477bf8c78b59a2e6398c4f283004048468 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:48:47,916 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:48:47,979 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:48:47,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:48:47,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:48:48,002 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:48:48,003 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:48:48,003 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:48:48,007 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:48:48,007 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:48:48,007 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:48:48,007 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:48:48,007 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:48:48,007 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:48:48,007 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:48:48,007 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:48:48,007 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:48:48,007 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:48:48,007 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:48:48,008 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:48:48,008 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:48:48,008 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:48:48,009 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:48:48,009 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/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 -> 8d0e6bdf4ddc5b5e0cadfb452142b6477bf8c78b59a2e6398c4f283004048468 [2025-03-08 05:48:48,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:48:48,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:48:48,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:48:48,286 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:48:48,286 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:48:48,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i [2025-03-08 05:48:49,439 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a0e8b851/a8760654971b4379a94e6f38bb685ff9/FLAG5eb0d7c83 [2025-03-08 05:48:49,712 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:48:49,715 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin.i [2025-03-08 05:48:49,722 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a0e8b851/a8760654971b4379a94e6f38bb685ff9/FLAG5eb0d7c83 [2025-03-08 05:48:49,742 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a0e8b851/a8760654971b4379a94e6f38bb685ff9 [2025-03-08 05:48:49,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:48:49,745 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:48:49,746 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:48:49,747 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:48:49,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:48:49,750 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,751 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6998bfef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49, skipping insertion in model container [2025-03-08 05:48:49,751 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,764 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:48:49,868 WARN L250 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_divbin.i[1564,1577] [2025-03-08 05:48:49,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:48:49,892 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:48:49,901 WARN L250 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_divbin.i[1564,1577] [2025-03-08 05:48:49,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:48:49,922 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:48:49,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49 WrapperNode [2025-03-08 05:48:49,923 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:48:49,924 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:48:49,924 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:48:49,924 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:48:49,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,933 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,946 INFO L138 Inliner]: procedures = 19, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2025-03-08 05:48:49,947 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:48:49,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:48:49,949 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:48:49,949 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:48:49,953 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,960 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,971 INFO L175 MemorySlicer]: Split 36 memory accesses to 6 slices as follows [2, 7, 11, 5, 7, 4]. 31 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 2, 3, 1, 3, 1]. [2025-03-08 05:48:49,972 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,972 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,979 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,984 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,985 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,986 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,988 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:48:49,991 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:48:49,991 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:48:49,991 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:48:49,992 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (1/1) ... [2025-03-08 05:48:49,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:48:50,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:48:50,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 05:48:50,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 05:48:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_37_0 [2025-03-08 05:48:50,042 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_37_0 [2025-03-08 05:48:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:48:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 05:48:50,042 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 05:48:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:48:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 05:48:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-08 05:48:50,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-08 05:48:50,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-03-08 05:48:50,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-03-08 05:48:50,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_46_0 [2025-03-08 05:48:50,044 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_46_0 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:48:50,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-08 05:48:50,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-08 05:48:50,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 05:48:50,122 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:48:50,124 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:48:50,291 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L117: call ULTIMATE.dealloc(main_~#A~0#1.base, main_~#A~0#1.offset);havoc main_~#A~0#1.base, main_~#A~0#1.offset;call ULTIMATE.dealloc(main_~#B~0#1.base, main_~#B~0#1.offset);havoc main_~#B~0#1.base, main_~#B~0#1.offset;call ULTIMATE.dealloc(main_~#q~0#1.base, main_~#q~0#1.offset);havoc main_~#q~0#1.base, main_~#q~0#1.offset;call ULTIMATE.dealloc(main_~#r~0#1.base, main_~#r~0#1.offset);havoc main_~#r~0#1.base, main_~#r~0#1.offset;call ULTIMATE.dealloc(main_~#b~0#1.base, main_~#b~0#1.offset);havoc main_~#b~0#1.base, main_~#b~0#1.offset; [2025-03-08 05:48:50,311 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-08 05:48:50,311 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:48:50,317 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:48:50,317 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:48:50,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:48:50 BoogieIcfgContainer [2025-03-08 05:48:50,318 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:48:50,319 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:48:50,319 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:48:50,322 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:48:50,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:48:49" (1/3) ... [2025-03-08 05:48:50,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa8f555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:48:50, skipping insertion in model container [2025-03-08 05:48:50,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:48:49" (2/3) ... [2025-03-08 05:48:50,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa8f555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:48:50, skipping insertion in model container [2025-03-08 05:48:50,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:48:50" (3/3) ... [2025-03-08 05:48:50,324 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_divbin.i [2025-03-08 05:48:50,334 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:48:50,335 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_divbin.i that has 5 procedures, 39 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 05:48:50,374 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:48:50,382 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;@5a8f4ebe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:48:50,383 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:48:50,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 28 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 05:48:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-08 05:48:50,393 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:48:50,393 INFO L218 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] [2025-03-08 05:48:50,394 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:48:50,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:48:50,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1015814450, now seen corresponding path program 1 times [2025-03-08 05:48:50,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:48:50,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052454340] [2025-03-08 05:48:50,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:48:50,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:48:50,487 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 05:48:50,514 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 05:48:50,514 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:48:50,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:48:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 05:48:50,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:48:50,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052454340] [2025-03-08 05:48:50,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052454340] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:48:50,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982314662] [2025-03-08 05:48:50,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:48:50,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:48:50,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:48:50,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:48:50,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:48:50,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 05:48:50,728 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 05:48:50,729 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:48:50,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:48:50,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-08 05:48:50,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:48:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 05:48:50,746 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:48:50,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982314662] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:48:50,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:48:50,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-08 05:48:50,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964334145] [2025-03-08 05:48:50,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:48:50,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 05:48:50,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:48:50,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 05:48:50,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 05:48:50,772 INFO L87 Difference]: Start difference. First operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 28 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 05:48:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:48:50,786 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2025-03-08 05:48:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 05:48:50,787 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2025-03-08 05:48:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:48:50,791 INFO L225 Difference]: With dead ends: 75 [2025-03-08 05:48:50,791 INFO L226 Difference]: Without dead ends: 35 [2025-03-08 05:48:50,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 05:48:50,795 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:48:50,796 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:48:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-08 05:48:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-03-08 05:48:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 05:48:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2025-03-08 05:48:50,822 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2025-03-08 05:48:50,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:48:50,822 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2025-03-08 05:48:50,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 05:48:50,823 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2025-03-08 05:48:50,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-08 05:48:50,824 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:48:50,824 INFO L218 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] [2025-03-08 05:48:50,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 05:48:51,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-08 05:48:51,025 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:48:51,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:48:51,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1990356649, now seen corresponding path program 1 times [2025-03-08 05:48:51,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:48:51,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19566112] [2025-03-08 05:48:51,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:48:51,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:48:51,044 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 05:48:51,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 05:48:51,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:48:51,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:48:51,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445292473] [2025-03-08 05:48:51,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:48:51,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:48:51,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:48:51,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:48:51,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:48:51,164 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 05:48:51,205 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 05:48:51,206 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:48:51,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:48:51,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-08 05:48:51,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:48:51,240 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 15 treesize of output 1 [2025-03-08 05:48:51,251 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 [2025-03-08 05:48:51,259 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 [2025-03-08 05:48:51,410 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 [2025-03-08 05:48:51,416 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 [2025-03-08 05:48:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:48:51,463 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:48:51,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:48:51,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19566112] [2025-03-08 05:48:51,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:48:51,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445292473] [2025-03-08 05:48:51,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445292473] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:48:51,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:48:51,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 05:48:51,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361561697] [2025-03-08 05:48:51,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:48:51,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 05:48:51,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:48:51,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 05:48:51,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:48:51,465 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 05:48:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:48:51,657 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2025-03-08 05:48:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:48:51,658 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2025-03-08 05:48:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:48:51,659 INFO L225 Difference]: With dead ends: 63 [2025-03-08 05:48:51,659 INFO L226 Difference]: Without dead ends: 59 [2025-03-08 05:48:51,660 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:48:51,660 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:48:51,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 170 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:48:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-08 05:48:51,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2025-03-08 05:48:51,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2025-03-08 05:48:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2025-03-08 05:48:51,675 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 27 [2025-03-08 05:48:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:48:51,675 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2025-03-08 05:48:51,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 05:48:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2025-03-08 05:48:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 05:48:51,676 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:48:51,676 INFO L218 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, 1, 1, 1] [2025-03-08 05:48:51,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 05:48:51,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2025-03-08 05:48:51,877 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:48:51,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:48:51,878 INFO L85 PathProgramCache]: Analyzing trace with hash -519016658, now seen corresponding path program 1 times [2025-03-08 05:48:51,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:48:51,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848292782] [2025-03-08 05:48:51,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:48:51,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:48:51,889 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:48:51,933 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:48:51,933 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:48:51,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:48:51,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086179514] [2025-03-08 05:48:51,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:48:51,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:48:51,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:48:51,937 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:48:51,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:48:51,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:48:52,451 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:48:52,451 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:48:52,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:48:52,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 82 conjuncts are in the unsatisfiable core [2025-03-08 05:48:52,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:48:52,475 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 [2025-03-08 05:48:52,487 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 [2025-03-08 05:48:52,492 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 [2025-03-08 05:48:52,497 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 [2025-03-08 05:48:52,500 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 [2025-03-08 05:48:52,580 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 [2025-03-08 05:48:52,852 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 [2025-03-08 05:48:52,855 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 [2025-03-08 05:48:52,859 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 [2025-03-08 05:48:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:48:52,897 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:48:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:48:53,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:48:53,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848292782] [2025-03-08 05:48:53,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:48:53,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086179514] [2025-03-08 05:48:53,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086179514] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:48:53,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:48:53,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2025-03-08 05:48:53,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801118167] [2025-03-08 05:48:53,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:48:53,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 05:48:53,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:48:53,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 05:48:53,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2025-03-08 05:48:53,638 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 20 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-08 05:48:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:48:55,487 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2025-03-08 05:48:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 05:48:55,488 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 37 [2025-03-08 05:48:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:48:55,490 INFO L225 Difference]: With dead ends: 87 [2025-03-08 05:48:55,492 INFO L226 Difference]: Without dead ends: 77 [2025-03-08 05:48:55,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 05:48:55,493 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:48:55,493 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 151 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 452 Invalid, 2 Unknown, 0 Unchecked, 1.3s Time] [2025-03-08 05:48:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-08 05:48:55,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2025-03-08 05:48:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.14) internal successors, (57), 53 states have internal predecessors, (57), 13 states have call successors, (13), 10 states have call predecessors, (13), 13 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2025-03-08 05:48:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2025-03-08 05:48:55,507 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 37 [2025-03-08 05:48:55,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:48:55,507 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2025-03-08 05:48:55,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-08 05:48:55,507 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2025-03-08 05:48:55,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-08 05:48:55,508 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:48:55,508 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-08 05:48:55,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 05:48:55,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:48:55,712 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:48:55,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:48:55,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1809712325, now seen corresponding path program 1 times [2025-03-08 05:48:55,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:48:55,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332239288] [2025-03-08 05:48:55,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:48:55,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:48:55,722 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 05:48:55,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 05:48:55,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:48:55,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:48:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:48:56,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:48:56,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332239288] [2025-03-08 05:48:56,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332239288] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:48:56,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:48:56,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 05:48:56,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569377427] [2025-03-08 05:48:56,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:48:56,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 05:48:56,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:48:56,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 05:48:56,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:48:56,439 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 05:48:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:48:56,721 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2025-03-08 05:48:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 05:48:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2025-03-08 05:48:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:48:56,723 INFO L225 Difference]: With dead ends: 126 [2025-03-08 05:48:56,723 INFO L226 Difference]: Without dead ends: 75 [2025-03-08 05:48:56,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:48:56,724 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:48:56,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 102 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:48:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-08 05:48:56,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2025-03-08 05:48:56,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 13 states have call successors, (13), 10 states have call predecessors, (13), 12 states have return successors, (20), 13 states have call predecessors, (20), 11 states have call successors, (20) [2025-03-08 05:48:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2025-03-08 05:48:56,746 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 38 [2025-03-08 05:48:56,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:48:56,746 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2025-03-08 05:48:56,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-08 05:48:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2025-03-08 05:48:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-08 05:48:56,748 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:48:56,749 INFO L218 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] [2025-03-08 05:48:56,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 05:48:56,749 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:48:56,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:48:56,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1691272252, now seen corresponding path program 1 times [2025-03-08 05:48:56,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:48:56,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062968299] [2025-03-08 05:48:56,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:48:56,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:48:56,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 05:48:56,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 05:48:56,815 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:48:56,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:48:56,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532857452] [2025-03-08 05:48:56,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:48:56,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:48:56,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:48:56,819 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:48:56,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:48:56,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-08 05:48:56,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 05:48:56,989 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:48:56,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:48:56,997 WARN L254 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 163 conjuncts are in the unsatisfiable core [2025-03-08 05:48:57,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:48:57,009 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 [2025-03-08 05:48:57,012 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 [2025-03-08 05:48:57,017 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 [2025-03-08 05:48:57,022 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 [2025-03-08 05:48:57,028 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 [2025-03-08 05:48:57,044 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 [2025-03-08 05:48:57,230 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 29 treesize of output 17 [2025-03-08 05:48:57,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2025-03-08 05:48:57,568 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2025-03-08 05:48:57,568 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 26 treesize of output 21 [2025-03-08 05:48:57,588 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 43 treesize of output 27 [2025-03-08 05:48:57,658 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2025-03-08 05:48:57,658 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 26 treesize of output 29 [2025-03-08 05:48:57,690 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2025-03-08 05:48:57,691 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 46 treesize of output 55 [2025-03-08 05:48:58,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 05:48:58,025 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 92 treesize of output 144 [2025-03-08 05:48:58,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 05:48:58,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 142 treesize of output 214 [2025-03-08 05:48:58,095 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 85 treesize of output 57 [2025-03-08 05:48:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 05:48:58,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:49:07,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:49:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062968299] [2025-03-08 05:49:07,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:49:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532857452] [2025-03-08 05:49:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532857452] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:49:07,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:49:07,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2025-03-08 05:49:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229765307] [2025-03-08 05:49:07,962 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:49:07,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 05:49:07,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:49:07,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 05:49:07,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=784, Unknown=2, NotChecked=0, Total=870 [2025-03-08 05:49:07,963 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-08 05:49:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:49:09,085 INFO L93 Difference]: Finished difference Result 116 states and 140 transitions. [2025-03-08 05:49:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 05:49:09,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2025-03-08 05:49:09,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:49:09,088 INFO L225 Difference]: With dead ends: 116 [2025-03-08 05:49:09,088 INFO L226 Difference]: Without dead ends: 112 [2025-03-08 05:49:09,088 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=145, Invalid=1185, Unknown=2, NotChecked=0, Total=1332 [2025-03-08 05:49:09,089 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 05:49:09,089 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 297 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 496 Invalid, 3 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 05:49:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-03-08 05:49:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2025-03-08 05:49:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 70 states have internal predecessors, (75), 18 states have call successors, (18), 14 states have call predecessors, (18), 17 states have return successors, (33), 18 states have call predecessors, (33), 16 states have call successors, (33) [2025-03-08 05:49:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2025-03-08 05:49:09,114 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 44 [2025-03-08 05:49:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:49:09,115 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2025-03-08 05:49:09,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-08 05:49:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2025-03-08 05:49:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-08 05:49:09,116 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:49:09,116 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2025-03-08 05:49:09,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 05:49:09,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:49:09,317 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:49:09,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:49:09,317 INFO L85 PathProgramCache]: Analyzing trace with hash -901242429, now seen corresponding path program 2 times [2025-03-08 05:49:09,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:49:09,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069600408] [2025-03-08 05:49:09,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:49:09,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:49:09,326 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-03-08 05:49:09,392 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 05:49:09,392 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:49:09,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:49:09,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676000001] [2025-03-08 05:49:09,396 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:49:09,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:49:09,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:49:09,398 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:49:09,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:49:09,457 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-03-08 05:49:09,669 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-08 05:49:09,669 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:49:09,669 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:49:09,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 133 conjuncts are in the unsatisfiable core [2025-03-08 05:49:09,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:49:09,678 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 [2025-03-08 05:49:09,686 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 [2025-03-08 05:49:09,690 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 [2025-03-08 05:49:09,869 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 [2025-03-08 05:49:09,882 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 [2025-03-08 05:49:09,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2025-03-08 05:49:09,923 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 [2025-03-08 05:49:09,978 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 [2025-03-08 05:49:09,980 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 35 treesize of output 19 [2025-03-08 05:49:09,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-08 05:49:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 05:49:10,027 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:49:10,142 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 28 [2025-03-08 05:49:10,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:49:10,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069600408] [2025-03-08 05:49:10,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:49:10,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676000001] [2025-03-08 05:49:10,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676000001] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:49:10,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:49:10,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-08 05:49:10,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19728072] [2025-03-08 05:49:10,304 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:49:10,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 05:49:10,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:49:10,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 05:49:10,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:49:10,305 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-08 05:49:10,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:49:10,690 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2025-03-08 05:49:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 05:49:10,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2025-03-08 05:49:10,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:49:10,693 INFO L225 Difference]: With dead ends: 121 [2025-03-08 05:49:10,693 INFO L226 Difference]: Without dead ends: 119 [2025-03-08 05:49:10,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2025-03-08 05:49:10,694 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:49:10,694 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 346 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:49:10,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-03-08 05:49:10,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2025-03-08 05:49:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 76 states have (on average 1.118421052631579) internal successors, (85), 80 states have internal predecessors, (85), 20 states have call successors, (20), 16 states have call predecessors, (20), 20 states have return successors, (40), 20 states have call predecessors, (40), 18 states have call successors, (40) [2025-03-08 05:49:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 145 transitions. [2025-03-08 05:49:10,710 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 145 transitions. Word has length 50 [2025-03-08 05:49:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:49:10,710 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 145 transitions. [2025-03-08 05:49:10,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-08 05:49:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 145 transitions. [2025-03-08 05:49:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-08 05:49:10,711 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:49:10,711 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 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] [2025-03-08 05:49:10,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 05:49:10,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:49:10,916 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:49:10,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:49:10,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1816557366, now seen corresponding path program 3 times [2025-03-08 05:49:10,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:49:10,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790277870] [2025-03-08 05:49:10,917 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:49:10,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:49:10,925 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 3 equivalence classes. [2025-03-08 05:49:11,079 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 05:49:11,079 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 05:49:11,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:49:34,228 WARN L286 SmtUtils]: Spent 8.52s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)