./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 16:02:37,576 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 16:02:37,650 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 16:02:37,659 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 16:02:37,659 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 16:02:37,681 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 16:02:37,682 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 16:02:37,682 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 16:02:37,683 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 16:02:37,683 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 16:02:37,683 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 16:02:37,684 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 16:02:37,684 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 16:02:37,684 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 16:02:37,684 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 16:02:37,684 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 16:02:37,685 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 16:02:37,686 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 16:02:37,686 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 16:02:37,686 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 16:02:37,686 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 16:02:37,686 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 16:02:37,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 16:02:37,686 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 16:02:37,686 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 16:02:37,686 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 16:02:37,687 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 16:02:37,687 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 16:02:37,687 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 16:02:37,687 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 16:02:37,687 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 16:02:37,687 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 16:02:37,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:02:37,687 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 16:02:37,687 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 16:02:37,687 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 16:02:37,687 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 16:02:37,687 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 16:02:37,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 16:02:37,688 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 16:02:37,688 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 16:02:37,688 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 16:02:37,688 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 16:02:37,688 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc [2025-02-05 16:02:38,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 16:02:38,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 16:02:38,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 16:02:38,017 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 16:02:38,017 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 16:02:38,018 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2025-02-05 16:02:39,341 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/07d19b63d/21804c88b5c64c93b5f388fb7106b2d8/FLAG728b0d099 [2025-02-05 16:02:39,618 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 16:02:39,619 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2025-02-05 16:02:39,639 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/07d19b63d/21804c88b5c64c93b5f388fb7106b2d8/FLAG728b0d099 [2025-02-05 16:02:39,695 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/07d19b63d/21804c88b5c64c93b5f388fb7106b2d8 [2025-02-05 16:02:39,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 16:02:39,702 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 16:02:39,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 16:02:39,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 16:02:39,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 16:02:39,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:39,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6755e2c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39, skipping insertion in model container [2025-02-05 16:02:39,713 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:39,727 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 16:02:39,858 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c[1019,1032] [2025-02-05 16:02:39,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:02:39,898 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 16:02:39,907 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c[1019,1032] [2025-02-05 16:02:39,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:02:39,938 INFO L204 MainTranslator]: Completed translation [2025-02-05 16:02:39,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39 WrapperNode [2025-02-05 16:02:39,939 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 16:02:39,940 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 16:02:39,940 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 16:02:39,940 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 16:02:39,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:39,959 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:39,979 INFO L138 Inliner]: procedures = 16, calls = 106, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 112 [2025-02-05 16:02:39,980 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 16:02:39,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 16:02:39,982 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 16:02:39,982 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 16:02:39,989 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:39,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:39,995 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:40,020 INFO L175 MemorySlicer]: Split 66 memory accesses to 9 slices as follows [2, 8, 8, 8, 10, 8, 8, 7, 7]. 15 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0]. The 14 writes are split as follows [0, 2, 2, 2, 2, 2, 2, 1, 1]. [2025-02-05 16:02:40,021 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:40,021 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:40,031 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:40,032 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:40,033 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:40,039 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:40,041 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 16:02:40,042 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 16:02:40,044 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 16:02:40,045 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 16:02:40,046 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (1/1) ... [2025-02-05 16:02:40,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:02:40,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:40,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 16:02:40,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 16:02:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 16:02:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_48_0 [2025-02-05 16:02:40,102 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_48_0 [2025-02-05 16:02:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-05 16:02:40,102 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-05 16:02:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 16:02:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 16:02:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 16:02:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-05 16:02:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-05 16:02:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-02-05 16:02:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-02-05 16:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2025-02-05 16:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2025-02-05 16:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 16:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 16:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 16:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 16:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-05 16:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-05 16:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-02-05 16:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2025-02-05 16:02:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2025-02-05 16:02:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2025-02-05 16:02:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 16:02:40,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 16:02:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 16:02:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 16:02:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 16:02:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-05 16:02:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-05 16:02:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-02-05 16:02:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-02-05 16:02:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2025-02-05 16:02:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2025-02-05 16:02:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 16:02:40,107 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 16:02:40,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 16:02:40,227 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 16:02:40,229 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 16:02:40,444 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L84: 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_~#p~0#1.base, main_~#p~0#1.offset);havoc main_~#p~0#1.base, main_~#p~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_~#s~0#1.base, main_~#s~0#1.offset);havoc main_~#s~0#1.base, main_~#s~0#1.offset;call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset;call ULTIMATE.dealloc(main_~#y~0#1.base, main_~#y~0#1.offset);havoc main_~#y~0#1.base, main_~#y~0#1.offset; [2025-02-05 16:02:40,469 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2025-02-05 16:02:40,469 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 16:02:40,482 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 16:02:40,482 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 16:02:40,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:02:40 BoogieIcfgContainer [2025-02-05 16:02:40,483 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 16:02:40,485 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 16:02:40,485 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 16:02:40,489 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 16:02:40,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 04:02:39" (1/3) ... [2025-02-05 16:02:40,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8781917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:02:40, skipping insertion in model container [2025-02-05 16:02:40,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:02:39" (2/3) ... [2025-02-05 16:02:40,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8781917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:02:40, skipping insertion in model container [2025-02-05 16:02:40,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:02:40" (3/3) ... [2025-02-05 16:02:40,492 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_egcd-ll.c [2025-02-05 16:02:40,508 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 16:02:40,509 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_egcd-ll.c that has 4 procedures, 42 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 16:02:40,566 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 16:02:40,578 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;@5e7ccad9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 16:02:40,579 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 16:02:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-05 16:02:40,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-05 16:02:40,589 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:40,589 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:40,590 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:40,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash 426273804, now seen corresponding path program 1 times [2025-02-05 16:02:40,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:40,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986854455] [2025-02-05 16:02:40,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:40,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:40,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:02:40,746 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:02:40,747 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:40,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 16:02:40,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:40,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986854455] [2025-02-05 16:02:40,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986854455] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:40,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973814216] [2025-02-05 16:02:40,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:40,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:40,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:40,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:40,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 16:02:40,972 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:02:41,024 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:02:41,024 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:41,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:41,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 16:02:41,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-05 16:02:41,042 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 16:02:41,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973814216] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:02:41,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:02:41,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 16:02:41,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838364441] [2025-02-05 16:02:41,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:02:41,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 16:02:41,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:41,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 16:02:41,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 16:02:41,065 INFO L87 Difference]: Start difference. First operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 16:02:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:41,085 INFO L93 Difference]: Finished difference Result 81 states and 115 transitions. [2025-02-05 16:02:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 16:02:41,086 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2025-02-05 16:02:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:41,092 INFO L225 Difference]: With dead ends: 81 [2025-02-05 16:02:41,092 INFO L226 Difference]: Without dead ends: 38 [2025-02-05 16:02:41,095 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 16:02:41,098 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:41,099 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 16:02:41,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-05 16:02:41,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-02-05 16:02:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-05 16:02:41,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2025-02-05 16:02:41,126 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 21 [2025-02-05 16:02:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:41,126 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2025-02-05 16:02:41,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-05 16:02:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2025-02-05 16:02:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-05 16:02:41,127 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:41,127 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:41,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-05 16:02:41,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-05 16:02:41,332 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:41,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:41,333 INFO L85 PathProgramCache]: Analyzing trace with hash -17367858, now seen corresponding path program 1 times [2025-02-05 16:02:41,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:41,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257013821] [2025-02-05 16:02:41,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:41,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:41,363 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:02:41,422 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:02:41,425 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:41,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:02:41,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556625868] [2025-02-05 16:02:41,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:41,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:41,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:41,434 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:41,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 16:02:41,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:02:41,599 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:02:41,599 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:41,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:41,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-05 16:02:41,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:41,658 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 [2025-02-05 16:02:41,670 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 [2025-02-05 16:02:41,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:02:41,686 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 11 treesize of output 7 [2025-02-05 16:02:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 16:02:41,882 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 16:02:41,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:41,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257013821] [2025-02-05 16:02:41,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:02:41,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556625868] [2025-02-05 16:02:41,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556625868] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:02:41,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:02:41,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-05 16:02:41,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152957100] [2025-02-05 16:02:41,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:02:41,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:02:41,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:41,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:02:41,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-02-05 16:02:41,888 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 16:02:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:42,173 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2025-02-05 16:02:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 16:02:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2025-02-05 16:02:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:42,176 INFO L225 Difference]: With dead ends: 61 [2025-02-05 16:02:42,176 INFO L226 Difference]: Without dead ends: 59 [2025-02-05 16:02:42,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-05 16:02:42,177 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:42,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 209 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 16:02:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-05 16:02:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2025-02-05 16:02:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2025-02-05 16:02:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2025-02-05 16:02:42,189 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 21 [2025-02-05 16:02:42,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:42,207 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2025-02-05 16:02:42,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-02-05 16:02:42,207 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2025-02-05 16:02:42,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-02-05 16:02:42,208 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:42,208 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] [2025-02-05 16:02:42,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 16:02:42,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:42,408 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:42,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:42,409 INFO L85 PathProgramCache]: Analyzing trace with hash 979391871, now seen corresponding path program 1 times [2025-02-05 16:02:42,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:42,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124273455] [2025-02-05 16:02:42,409 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:42,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:42,426 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 16:02:42,480 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 16:02:42,484 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:42,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:02:42,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698720327] [2025-02-05 16:02:42,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:42,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:42,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:42,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:42,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 16:02:42,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-05 16:02:42,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-05 16:02:42,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:42,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:42,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 82 conjuncts are in the unsatisfiable core [2025-02-05 16:02:42,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:42,639 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 [2025-02-05 16:02:42,643 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 [2025-02-05 16:02:42,826 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 [2025-02-05 16:02:42,835 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 [2025-02-05 16:02:42,844 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 [2025-02-05 16:02:43,315 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 [2025-02-05 16:02:43,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 16:02:43,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2025-02-05 16:02:43,345 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 [2025-02-05 16:02:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:02:43,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:43,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:43,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124273455] [2025-02-05 16:02:43,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:02:43,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698720327] [2025-02-05 16:02:43,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698720327] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:43,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:02:43,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-02-05 16:02:43,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267653729] [2025-02-05 16:02:43,573 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:43,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-05 16:02:43,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:43,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-05 16:02:43,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-02-05 16:02:43,575 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 18 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 16:02:47,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-02-05 16:02:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:48,653 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2025-02-05 16:02:48,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-05 16:02:48,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2025-02-05 16:02:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:48,656 INFO L225 Difference]: With dead ends: 95 [2025-02-05 16:02:48,656 INFO L226 Difference]: Without dead ends: 93 [2025-02-05 16:02:48,656 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2025-02-05 16:02:48,657 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:48,657 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 250 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 496 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2025-02-05 16:02:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-02-05 16:02:48,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2025-02-05 16:02:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 58 states have internal predecessors, (62), 22 states have call successors, (22), 9 states have call predecessors, (22), 10 states have return successors, (24), 21 states have call predecessors, (24), 20 states have call successors, (24) [2025-02-05 16:02:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2025-02-05 16:02:48,685 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 27 [2025-02-05 16:02:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:48,686 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2025-02-05 16:02:48,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 16:02:48,686 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2025-02-05 16:02:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 16:02:48,687 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:48,687 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:48,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 16:02:48,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:48,888 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:48,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:48,888 INFO L85 PathProgramCache]: Analyzing trace with hash 923786354, now seen corresponding path program 1 times [2025-02-05 16:02:48,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:48,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107125658] [2025-02-05 16:02:48,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:48,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:48,907 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 16:02:48,944 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 16:02:48,945 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:48,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:02:48,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334076576] [2025-02-05 16:02:48,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:48,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:48,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:48,953 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:48,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 16:02:49,035 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 16:02:49,100 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 16:02:49,100 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:49,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:49,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-02-05 16:02:49,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:49,114 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 [2025-02-05 16:02:49,119 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 [2025-02-05 16:02:49,122 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 [2025-02-05 16:02:49,128 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 [2025-02-05 16:02:49,357 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 [2025-02-05 16:02:49,360 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 [2025-02-05 16:02:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-05 16:02:49,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:49,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:49,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107125658] [2025-02-05 16:02:49,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:02:49,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334076576] [2025-02-05 16:02:49,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334076576] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:49,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:02:49,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2025-02-05 16:02:49,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70264484] [2025-02-05 16:02:49,468 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:49,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 16:02:49,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:49,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 16:02:49,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2025-02-05 16:02:49,470 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 16:02:49,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:49,827 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2025-02-05 16:02:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 16:02:49,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2025-02-05 16:02:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:49,831 INFO L225 Difference]: With dead ends: 146 [2025-02-05 16:02:49,831 INFO L226 Difference]: Without dead ends: 144 [2025-02-05 16:02:49,832 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-02-05 16:02:49,833 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 52 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:49,834 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 151 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 16:02:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-02-05 16:02:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2025-02-05 16:02:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 92 states have internal predecessors, (100), 34 states have call successors, (34), 15 states have call predecessors, (34), 17 states have return successors, (37), 33 states have call predecessors, (37), 30 states have call successors, (37) [2025-02-05 16:02:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 171 transitions. [2025-02-05 16:02:49,885 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 171 transitions. Word has length 33 [2025-02-05 16:02:49,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:49,885 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 171 transitions. [2025-02-05 16:02:49,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 16:02:49,885 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 171 transitions. [2025-02-05 16:02:49,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-02-05 16:02:49,886 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:49,886 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:49,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 16:02:50,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:50,087 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:50,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:50,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1144909765, now seen corresponding path program 1 times [2025-02-05 16:02:50,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:50,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835038792] [2025-02-05 16:02:50,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:50,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:50,102 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-02-05 16:02:50,115 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-02-05 16:02:50,115 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:50,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 16:02:50,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:50,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835038792] [2025-02-05 16:02:50,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835038792] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:02:50,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:02:50,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-05 16:02:50,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062889772] [2025-02-05 16:02:50,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:02:50,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 16:02:50,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:50,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 16:02:50,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-02-05 16:02:50,606 INFO L87 Difference]: Start difference. First operand 140 states and 171 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 16:02:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:50,806 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2025-02-05 16:02:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 16:02:50,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2025-02-05 16:02:50,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:50,808 INFO L225 Difference]: With dead ends: 158 [2025-02-05 16:02:50,808 INFO L226 Difference]: Without dead ends: 156 [2025-02-05 16:02:50,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-02-05 16:02:50,809 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:50,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 247 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:02:50,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-02-05 16:02:50,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2025-02-05 16:02:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 100 states have (on average 1.12) internal successors, (112), 104 states have internal predecessors, (112), 34 states have call successors, (34), 19 states have call predecessors, (34), 21 states have return successors, (37), 33 states have call predecessors, (37), 30 states have call successors, (37) [2025-02-05 16:02:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 183 transitions. [2025-02-05 16:02:50,856 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 183 transitions. Word has length 43 [2025-02-05 16:02:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:50,857 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 183 transitions. [2025-02-05 16:02:50,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 16:02:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 183 transitions. [2025-02-05 16:02:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-05 16:02:50,859 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:50,859 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:50,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-05 16:02:50,859 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:50,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:50,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1293273473, now seen corresponding path program 1 times [2025-02-05 16:02:50,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:50,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098190082] [2025-02-05 16:02:50,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:50,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:50,879 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-05 16:02:50,913 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-05 16:02:50,914 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:50,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:02:50,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938309155] [2025-02-05 16:02:50,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:50,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:50,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:50,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:50,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 16:02:51,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-05 16:02:51,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-05 16:02:51,083 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:51,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:51,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-02-05 16:02:51,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:51,100 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 [2025-02-05 16:02:51,105 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 [2025-02-05 16:02:51,110 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 [2025-02-05 16:02:51,368 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 [2025-02-05 16:02:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 16:02:51,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:51,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:02:51,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098190082] [2025-02-05 16:02:51,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:02:51,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938309155] [2025-02-05 16:02:51,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938309155] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:02:51,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:02:51,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2025-02-05 16:02:51,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453780015] [2025-02-05 16:02:51,643 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:02:51,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 16:02:51,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:02:51,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 16:02:51,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-02-05 16:02:51,644 INFO L87 Difference]: Start difference. First operand 156 states and 183 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 16:02:51,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:02:51,891 INFO L93 Difference]: Finished difference Result 166 states and 192 transitions. [2025-02-05 16:02:51,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 16:02:51,891 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2025-02-05 16:02:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:02:51,894 INFO L225 Difference]: With dead ends: 166 [2025-02-05 16:02:51,894 INFO L226 Difference]: Without dead ends: 164 [2025-02-05 16:02:51,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2025-02-05 16:02:51,895 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 37 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 16:02:51,895 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 206 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 16:02:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2025-02-05 16:02:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2025-02-05 16:02:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 103 states have (on average 1.116504854368932) internal successors, (115), 107 states have internal predecessors, (115), 34 states have call successors, (34), 20 states have call predecessors, (34), 22 states have return successors, (37), 33 states have call predecessors, (37), 30 states have call successors, (37) [2025-02-05 16:02:51,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 186 transitions. [2025-02-05 16:02:51,925 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 186 transitions. Word has length 44 [2025-02-05 16:02:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:02:51,925 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 186 transitions. [2025-02-05 16:02:51,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 16:02:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 186 transitions. [2025-02-05 16:02:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-05 16:02:51,926 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:02:51,927 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:02:51,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 16:02:52,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:52,131 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:02:52,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:02:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash 449536862, now seen corresponding path program 1 times [2025-02-05 16:02:52,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:02:52,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777212665] [2025-02-05 16:02:52,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:52,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:02:52,145 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-05 16:02:52,180 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-05 16:02:52,181 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:52,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:02:52,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218306875] [2025-02-05 16:02:52,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:02:52,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:02:52,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:02:52,188 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:02:52,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 16:02:52,270 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-05 16:02:52,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-05 16:02:52,345 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:02:52,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:02:52,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 107 conjuncts are in the unsatisfiable core [2025-02-05 16:02:52,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:02:52,362 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 [2025-02-05 16:02:52,364 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 [2025-02-05 16:02:52,368 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 [2025-02-05 16:02:52,371 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 [2025-02-05 16:02:52,690 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 [2025-02-05 16:02:52,700 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 23 treesize of output 3 [2025-02-05 16:02:52,768 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 [2025-02-05 16:02:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 16:02:52,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:02:56,724 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_33_to_48_0_#t~mem7_7| Int)) (or (= (+ (* |v_func_to_recursive_line_33_to_48_0_#t~mem7_7| (select (select |c_#memory_int#5| c_func_to_recursive_line_33_to_48_0_~r.base) c_func_to_recursive_line_33_to_48_0_~r.offset)) 1) (* (select (select |c_#memory_int#6| c_func_to_recursive_line_33_to_48_0_~p.base) c_func_to_recursive_line_33_to_48_0_~p.offset) (select (select |c_#memory_int#1| c_func_to_recursive_line_33_to_48_0_~s.base) c_func_to_recursive_line_33_to_48_0_~s.offset))) (< (select (select |c_#memory_int#3| c_func_to_recursive_line_33_to_48_0_~q.base) c_func_to_recursive_line_33_to_48_0_~q.offset) |v_func_to_recursive_line_33_to_48_0_#t~mem7_7|))) is different from false [2025-02-05 16:03:00,744 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_33_to_48_0_#t~mem7_7| Int)) (or (= (* (select (select |c_#memory_int#1| |c_func_to_recursive_line_33_to_48_0_#in~s.base|) |c_func_to_recursive_line_33_to_48_0_#in~s.offset|) (select (select |c_#memory_int#6| |c_func_to_recursive_line_33_to_48_0_#in~p.base|) |c_func_to_recursive_line_33_to_48_0_#in~p.offset|)) (+ (* |v_func_to_recursive_line_33_to_48_0_#t~mem7_7| (select (select |c_#memory_int#5| |c_func_to_recursive_line_33_to_48_0_#in~r.base|) |c_func_to_recursive_line_33_to_48_0_#in~r.offset|)) 1)) (< (select (select |c_#memory_int#3| |c_func_to_recursive_line_33_to_48_0_#in~q.base|) |c_func_to_recursive_line_33_to_48_0_#in~q.offset|) |v_func_to_recursive_line_33_to_48_0_#t~mem7_7|))) is different from false [2025-02-05 16:03:04,327 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_33_to_48_0_#t~mem7_7| Int)) (let ((.cse1 (select (select |c_#memory_int#6| c_func_to_recursive_line_33_to_48_0_~p.base) c_func_to_recursive_line_33_to_48_0_~p.offset))) (or (= (let ((.cse0 (select (select |c_#memory_int#5| c_func_to_recursive_line_33_to_48_0_~r.base) c_func_to_recursive_line_33_to_48_0_~r.offset))) (+ (* |v_func_to_recursive_line_33_to_48_0_#t~mem7_7| .cse0) (* .cse1 .cse0) 1)) (* .cse1 (select (select |c_#memory_int#1| c_func_to_recursive_line_33_to_48_0_~s.base) c_func_to_recursive_line_33_to_48_0_~s.offset))) (< (select (select |c_#memory_int#3| c_func_to_recursive_line_33_to_48_0_~q.base) c_func_to_recursive_line_33_to_48_0_~q.offset) (+ .cse1 |v_func_to_recursive_line_33_to_48_0_#t~mem7_7|))))) is different from false [2025-02-05 16:03:04,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:03:04,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777212665] [2025-02-05 16:03:04,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:03:04,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218306875] [2025-02-05 16:03:04,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218306875] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:03:04,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:03:04,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2025-02-05 16:03:04,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421372113] [2025-02-05 16:03:04,362 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:03:04,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 16:03:04,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:03:04,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 16:03:04,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=110, Unknown=3, NotChecked=66, Total=210 [2025-02-05 16:03:04,363 INFO L87 Difference]: Start difference. First operand 160 states and 186 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 16:03:04,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:03:04,821 INFO L93 Difference]: Finished difference Result 171 states and 200 transitions. [2025-02-05 16:03:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 16:03:04,822 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2025-02-05 16:03:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:03:04,823 INFO L225 Difference]: With dead ends: 171 [2025-02-05 16:03:04,823 INFO L226 Difference]: Without dead ends: 169 [2025-02-05 16:03:04,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=51, Invalid=198, Unknown=3, NotChecked=90, Total=342 [2025-02-05 16:03:04,826 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 42 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 16:03:04,826 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 295 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 16:03:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-02-05 16:03:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2025-02-05 16:03:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 110 states have internal predecessors, (118), 34 states have call successors, (34), 21 states have call predecessors, (34), 23 states have return successors, (37), 33 states have call predecessors, (37), 30 states have call successors, (37) [2025-02-05 16:03:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2025-02-05 16:03:04,856 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 44 [2025-02-05 16:03:04,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:03:04,856 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2025-02-05 16:03:04,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 16:03:04,857 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2025-02-05 16:03:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-05 16:03:04,857 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:03:04,857 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:03:04,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 16:03:05,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-05 16:03:05,058 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:03:05,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:03:05,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1341974087, now seen corresponding path program 1 times [2025-02-05 16:03:05,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:03:05,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260954146] [2025-02-05 16:03:05,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:03:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:03:05,069 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-05 16:03:05,085 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 16:03:05,085 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:03:05,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:03:05,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601084204] [2025-02-05 16:03:05,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:03:05,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:03:05,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:03:05,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:03:05,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 16:03:05,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-05 16:03:05,252 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 16:03:05,252 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:03:05,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:03:05,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-05 16:03:05,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:03:05,261 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 [2025-02-05 16:03:05,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-02-05 16:03:05,270 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 [2025-02-05 16:03:05,276 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 [2025-02-05 16:03:05,283 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 [2025-02-05 16:03:05,301 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 [2025-02-05 16:03:05,304 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 [2025-02-05 16:03:05,404 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 [2025-02-05 16:03:05,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 16:03:05,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2025-02-05 16:03:05,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 16:03:05,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2025-02-05 16:03:05,582 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 [2025-02-05 16:03:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 16:03:05,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:03:28,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:03:28,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260954146] [2025-02-05 16:03:28,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:03:28,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601084204] [2025-02-05 16:03:28,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601084204] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:03:28,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:03:28,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2025-02-05 16:03:28,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943227268] [2025-02-05 16:03:28,968 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:03:28,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 16:03:28,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:03:28,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 16:03:28,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=282, Unknown=5, NotChecked=0, Total=342 [2025-02-05 16:03:28,970 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2025-02-05 16:03:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:03:39,960 INFO L93 Difference]: Finished difference Result 174 states and 197 transitions. [2025-02-05 16:03:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 16:03:39,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2025-02-05 16:03:39,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:03:39,962 INFO L225 Difference]: With dead ends: 174 [2025-02-05 16:03:39,962 INFO L226 Difference]: Without dead ends: 172 [2025-02-05 16:03:39,962 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=120, Invalid=525, Unknown=5, NotChecked=0, Total=650 [2025-02-05 16:03:39,963 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:03:39,964 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 112 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 371 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2025-02-05 16:03:39,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2025-02-05 16:03:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2025-02-05 16:03:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 110 states have (on average 1.1090909090909091) internal successors, (122), 114 states have internal predecessors, (122), 34 states have call successors, (34), 22 states have call predecessors, (34), 25 states have return successors, (38), 33 states have call predecessors, (38), 30 states have call successors, (38) [2025-02-05 16:03:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 194 transitions. [2025-02-05 16:03:39,991 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 194 transitions. Word has length 49 [2025-02-05 16:03:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:03:39,991 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 194 transitions. [2025-02-05 16:03:39,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2025-02-05 16:03:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 194 transitions. [2025-02-05 16:03:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-05 16:03:39,992 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:03:39,993 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:03:40,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 16:03:40,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:03:40,193 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:03:40,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:03:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1032599952, now seen corresponding path program 2 times [2025-02-05 16:03:40,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:03:40,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823768228] [2025-02-05 16:03:40,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:03:40,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:03:40,206 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-05 16:03:40,234 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 16:03:40,234 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:03:40,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:03:40,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068582190] [2025-02-05 16:03:40,236 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 16:03:40,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:03:40,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:03:40,239 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 16:03:40,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 16:03:40,329 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-02-05 16:03:40,401 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-02-05 16:03:40,401 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 16:03:40,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:03:40,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 185 conjuncts are in the unsatisfiable core [2025-02-05 16:03:40,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:03:40,448 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 [2025-02-05 16:03:40,484 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 [2025-02-05 16:03:41,137 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 [2025-02-05 16:03:41,205 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 [2025-02-05 16:03:41,307 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 [2025-02-05 16:03:41,376 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 [2025-02-05 16:03:41,448 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 [2025-02-05 16:03:41,517 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 [2025-02-05 16:03:53,955 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 [2025-02-05 16:03:54,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2025-02-05 16:03:54,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2025-02-05 16:03:54,198 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 48 treesize of output 30 [2025-02-05 16:03:58,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2025-02-05 16:03:58,084 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 28 treesize of output 16 [2025-02-05 16:03:58,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2025-02-05 16:03:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-05 16:03:59,947 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:04:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 16:04:08,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:04:08,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823768228] [2025-02-05 16:04:08,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:04:08,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068582190] [2025-02-05 16:04:08,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068582190] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:04:08,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:04:08,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 30 [2025-02-05 16:04:08,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524534921] [2025-02-05 16:04:08,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:04:08,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-05 16:04:08,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:04:08,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-05 16:04:08,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2025-02-05 16:04:08,413 INFO L87 Difference]: Start difference. First operand 170 states and 194 transitions. Second operand has 30 states, 25 states have (on average 1.96) internal successors, (49), 23 states have internal predecessors, (49), 10 states have call successors, (17), 9 states have call predecessors, (17), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11)