./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-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_fermat2-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 9ae1eacd45e2434e505261d43bb17259916099964617682d271ef41fa1c24d0c --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 16:03:15,577 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 16:03:15,622 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 16:03:15,625 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 16:03:15,625 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 16:03:15,639 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 16:03:15,639 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 16:03:15,639 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 16:03:15,639 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 16:03:15,639 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 16:03:15,639 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 16:03:15,639 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 16:03:15,640 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 16:03:15,640 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 16:03:15,640 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 16:03:15,640 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 16:03:15,640 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 16:03:15,640 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 16:03:15,640 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 16:03:15,640 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 16:03:15,640 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 16:03:15,640 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 16:03:15,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 16:03:15,640 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 16:03:15,640 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 16:03:15,641 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:03:15,641 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 16:03:15,641 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 16:03:15,642 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 16:03:15,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 16:03:15,642 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 -> 9ae1eacd45e2434e505261d43bb17259916099964617682d271ef41fa1c24d0c [2025-02-05 16:03:15,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 16:03:15,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 16:03:15,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 16:03:15,896 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 16:03:15,896 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 16:03:15,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c [2025-02-05 16:03:17,075 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9afda54e7/2b1679a834ef4869a8be1a3113cd6c3b/FLAG4608dbfc4 [2025-02-05 16:03:17,342 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 16:03:17,343 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c [2025-02-05 16:03:17,351 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9afda54e7/2b1679a834ef4869a8be1a3113cd6c3b/FLAG4608dbfc4 [2025-02-05 16:03:17,368 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9afda54e7/2b1679a834ef4869a8be1a3113cd6c3b [2025-02-05 16:03:17,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 16:03:17,371 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 16:03:17,373 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 16:03:17,373 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 16:03:17,376 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 16:03:17,376 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,377 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3db62278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17, skipping insertion in model container [2025-02-05 16:03:17,378 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,393 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 16:03:17,496 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_fermat2-ll.c[1060,1073] [2025-02-05 16:03:17,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:03:17,524 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 16:03:17,531 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_fermat2-ll.c[1060,1073] [2025-02-05 16:03:17,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 16:03:17,553 INFO L204 MainTranslator]: Completed translation [2025-02-05 16:03:17,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17 WrapperNode [2025-02-05 16:03:17,554 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 16:03:17,556 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 16:03:17,556 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 16:03:17,556 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 16:03:17,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,566 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,578 INFO L138 Inliner]: procedures = 16, calls = 59, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2025-02-05 16:03:17,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 16:03:17,581 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 16:03:17,581 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 16:03:17,581 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 16:03:17,586 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,588 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,606 INFO L175 MemorySlicer]: Split 36 memory accesses to 5 slices as follows [2, 10, 10, 8, 6]. 28 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 2, 2, 3, 1]. [2025-02-05 16:03:17,606 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,606 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,610 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,610 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,611 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,611 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,613 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 16:03:17,613 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 16:03:17,613 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 16:03:17,613 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 16:03:17,614 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (1/1) ... [2025-02-05 16:03:17,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 16:03:17,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:03:17,646 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 16:03:17,656 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 16:03:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 16:03:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-05 16:03:17,676 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-05 16:03:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 16:03:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-05 16:03:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-05 16:03:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-05 16:03:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-05 16:03:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-05 16:03:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_42_0 [2025-02-05 16:03:17,678 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_42_0 [2025-02-05 16:03:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-05 16:03:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-05 16:03:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-05 16:03:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-05 16:03:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-05 16:03:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 16:03:17,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 16:03:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-05 16:03:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-05 16:03:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-05 16:03:17,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-05 16:03:17,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-05 16:03:17,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 16:03:17,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 16:03:17,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-05 16:03:17,748 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 16:03:17,750 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 16:03:17,889 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L81: 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_~#u~0#1.base, main_~#u~0#1.offset);havoc main_~#u~0#1.base, main_~#u~0#1.offset;call ULTIMATE.dealloc(main_~#v~0#1.base, main_~#v~0#1.offset);havoc main_~#v~0#1.base, main_~#v~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; [2025-02-05 16:03:17,918 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-02-05 16:03:17,918 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 16:03:17,930 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 16:03:17,931 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 16:03:17,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:03:17 BoogieIcfgContainer [2025-02-05 16:03:17,931 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 16:03:17,933 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 16:03:17,933 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 16:03:17,936 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 16:03:17,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 04:03:17" (1/3) ... [2025-02-05 16:03:17,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b85d18a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:03:17, skipping insertion in model container [2025-02-05 16:03:17,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 04:03:17" (2/3) ... [2025-02-05 16:03:17,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b85d18a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 04:03:17, skipping insertion in model container [2025-02-05 16:03:17,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 04:03:17" (3/3) ... [2025-02-05 16:03:17,938 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_fermat2-ll.c [2025-02-05 16:03:17,948 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 16:03:17,949 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_fermat2-ll.c that has 4 procedures, 32 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 16:03:18,000 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 16:03:18,011 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;@ce391c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 16:03:18,012 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 16:03:18,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 16:03:18,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-05 16:03:18,018 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:03:18,018 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 16:03:18,019 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:03:18,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:03:18,022 INFO L85 PathProgramCache]: Analyzing trace with hash 991344098, now seen corresponding path program 1 times [2025-02-05 16:03:18,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:03:18,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979538668] [2025-02-05 16:03:18,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:03:18,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:03:18,086 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:03:18,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:03:18,111 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:03:18,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:03:18,167 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 16:03:18,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:03:18,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979538668] [2025-02-05 16:03:18,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979538668] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:03:18,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778970245] [2025-02-05 16:03:18,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:03:18,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:03:18,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:03:18,172 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 16:03:18,174 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 16:03:18,224 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:03:18,270 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:03:18,270 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:03:18,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:03:18,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 16:03:18,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:03:18,285 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 16:03:18,286 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 16:03:18,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778970245] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:03:18,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:03:18,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 16:03:18,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671926431] [2025-02-05 16:03:18,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:03:18,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 16:03:18,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:03:18,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 16:03:18,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 16:03:18,309 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 16:03:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:03:18,323 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2025-02-05 16:03:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 16:03:18,324 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 16:03:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:03:18,330 INFO L225 Difference]: With dead ends: 61 [2025-02-05 16:03:18,330 INFO L226 Difference]: Without dead ends: 28 [2025-02-05 16:03:18,333 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 16:03:18,336 INFO L435 NwaCegarLoop]: 36 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, 36 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 16:03:18,338 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 16:03:18,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-05 16:03:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-02-05 16:03:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 16:03:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2025-02-05 16:03:18,368 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2025-02-05 16:03:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:03:18,368 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2025-02-05 16:03:18,368 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 16:03:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2025-02-05 16:03:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-05 16:03:18,370 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:03:18,371 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 16:03:18,377 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 16:03:18,575 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 16:03:18,575 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:03:18,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:03:18,576 INFO L85 PathProgramCache]: Analyzing trace with hash 547702436, now seen corresponding path program 1 times [2025-02-05 16:03:18,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:03:18,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003709375] [2025-02-05 16:03:18,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:03:18,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:03:18,603 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:03:18,665 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:03:18,668 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:03:18,669 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:03:18,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93116631] [2025-02-05 16:03:18,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:03:18,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:03:18,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:03:18,678 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 16:03:18,679 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 16:03:18,734 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-05 16:03:18,795 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-05 16:03:18,795 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:03:18,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:03:18,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 69 conjuncts are in the unsatisfiable core [2025-02-05 16:03:18,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:03:18,825 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 16:03:18,865 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 16:03:18,874 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 21 treesize of output 15 [2025-02-05 16:03:18,879 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 16:03:19,053 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 39 treesize of output 31 [2025-02-05 16:03:19,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2025-02-05 16:03:19,079 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 56 treesize of output 32 [2025-02-05 16:03:19,193 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 16:03:19,193 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 16:03:19,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:03:19,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003709375] [2025-02-05 16:03:19,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:03:19,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93116631] [2025-02-05 16:03:19,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93116631] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 16:03:19,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 16:03:19,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-05 16:03:19,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472159669] [2025-02-05 16:03:19,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 16:03:19,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-05 16:03:19,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:03:19,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-05 16:03:19,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-02-05 16:03:19,197 INFO L87 Difference]: Start difference. First operand 28 states and 32 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 16:03:22,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-02-05 16:03:22,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:03:22,510 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2025-02-05 16:03:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 16:03:22,514 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 16:03:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:03:22,516 INFO L225 Difference]: With dead ends: 46 [2025-02-05 16:03:22,516 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 16:03:22,517 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 16:03:22,517 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2025-02-05 16:03:22,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 137 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2025-02-05 16:03:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 16:03:22,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2025-02-05 16:03:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2025-02-05 16:03:22,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2025-02-05 16:03:22,529 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 21 [2025-02-05 16:03:22,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:03:22,529 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2025-02-05 16:03:22,529 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 16:03:22,529 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2025-02-05 16:03:22,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-05 16:03:22,530 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:03:22,530 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:03:22,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 16:03:22,730 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 16:03:22,731 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:03:22,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:03:22,732 INFO L85 PathProgramCache]: Analyzing trace with hash 21148181, now seen corresponding path program 1 times [2025-02-05 16:03:22,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:03:22,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597612929] [2025-02-05 16:03:22,732 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:03:22,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:03:22,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 16:03:22,781 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 16:03:22,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:03:22,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:03:22,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573043825] [2025-02-05 16:03:22,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:03:22,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:03:22,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:03:22,786 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 16:03:22,788 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 16:03:22,827 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 16:03:22,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 16:03:22,863 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:03:22,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:03:22,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-02-05 16:03:22,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:03:22,873 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 16:03:22,956 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 21 treesize of output 15 [2025-02-05 16:03:22,961 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 16:03:22,976 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 16:03:23,021 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 31 treesize of output 27 [2025-02-05 16:03:23,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2025-02-05 16:03:27,947 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 91 treesize of output 55 [2025-02-05 16:03:27,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 16:03:27,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 57 [2025-02-05 16:03:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:03:28,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:03:33,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:03:33,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597612929] [2025-02-05 16:03:33,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:03:33,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573043825] [2025-02-05 16:03:33,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573043825] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:03:33,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:03:33,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2025-02-05 16:03:33,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156248882] [2025-02-05 16:03:33,570 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:03:33,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 16:03:33,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:03:33,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 16:03:33,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=432, Unknown=1, NotChecked=0, Total=506 [2025-02-05 16:03:33,571 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 16:03:37,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:03:41,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:03:44,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:03:48,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:03:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:03:49,391 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2025-02-05 16:03:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-05 16:03:49,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2025-02-05 16:03:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:03:49,392 INFO L225 Difference]: With dead ends: 57 [2025-02-05 16:03:49,392 INFO L226 Difference]: Without dead ends: 49 [2025-02-05 16:03:49,392 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=138, Invalid=853, Unknown=1, NotChecked=0, Total=992 [2025-02-05 16:03:49,393 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2025-02-05 16:03:49,393 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 83 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 366 Invalid, 3 Unknown, 0 Unchecked, 15.5s Time] [2025-02-05 16:03:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-02-05 16:03:49,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2025-02-05 16:03:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2025-02-05 16:03:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2025-02-05 16:03:49,401 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 31 [2025-02-05 16:03:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:03:49,401 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2025-02-05 16:03:49,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-05 16:03:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2025-02-05 16:03:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-05 16:03:49,402 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:03:49,402 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:03:49,410 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 16:03:49,606 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 16:03:49,606 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:03:49,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:03:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1495874809, now seen corresponding path program 1 times [2025-02-05 16:03:49,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:03:49,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762958172] [2025-02-05 16:03:49,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:03:49,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:03:49,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 16:03:49,634 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 16:03:49,635 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:03:49,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:03:49,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132606940] [2025-02-05 16:03:49,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:03:49,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:03:49,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:03:49,638 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 16:03:49,666 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 16:03:49,707 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 16:03:49,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 16:03:49,817 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:03:49,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:03:49,824 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 135 conjuncts are in the unsatisfiable core [2025-02-05 16:03:49,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:03:49,838 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 16:03:53,995 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 21 treesize of output 15 [2025-02-05 16:03:53,998 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 16:03:54,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-02-05 16:03:54,827 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 56 treesize of output 40 [2025-02-05 16:03:54,839 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 16:03:55,058 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 40 treesize of output 32 [2025-02-05 16:03:55,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 16:03:55,075 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 120 treesize of output 108 [2025-02-05 16:03:55,085 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 125 treesize of output 81 [2025-02-05 16:03:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 16:03:55,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:04:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 16:04:04,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:04:04,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762958172] [2025-02-05 16:04:04,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:04:04,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132606940] [2025-02-05 16:04:04,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132606940] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 16:04:04,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 16:04:04,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 28 [2025-02-05 16:04:04,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230040474] [2025-02-05 16:04:04,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 16:04:04,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-05 16:04:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:04:04,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-05 16:04:04,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=663, Unknown=1, NotChecked=0, Total=756 [2025-02-05 16:04:04,885 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 28 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-05 16:04:08,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:04:12,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:04:15,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:04:17,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:04:20,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:04:40,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:04:42,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:04:43,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:04:44,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 16:04:44,287 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2025-02-05 16:04:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-02-05 16:04:44,287 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2025-02-05 16:04:44,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 16:04:44,288 INFO L225 Difference]: With dead ends: 80 [2025-02-05 16:04:44,288 INFO L226 Difference]: Without dead ends: 74 [2025-02-05 16:04:44,289 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=241, Invalid=1562, Unknown=3, NotChecked=0, Total=1806 [2025-02-05 16:04:44,290 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2025-02-05 16:04:44,290 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 254 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 510 Invalid, 2 Unknown, 0 Unchecked, 20.7s Time] [2025-02-05 16:04:44,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-02-05 16:04:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2025-02-05 16:04:44,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 11 states have call successors, (11), 10 states have call predecessors, (11), 12 states have return successors, (19), 11 states have call predecessors, (19), 10 states have call successors, (19) [2025-02-05 16:04:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2025-02-05 16:04:44,305 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 32 [2025-02-05 16:04:44,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 16:04:44,305 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2025-02-05 16:04:44,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 8 states have call predecessors, (12), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-05 16:04:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2025-02-05 16:04:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-05 16:04:44,306 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 16:04:44,306 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 16:04:44,311 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 16:04:44,510 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 16:04:44,510 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 16:04:44,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 16:04:44,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1193199212, now seen corresponding path program 1 times [2025-02-05 16:04:44,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 16:04:44,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885522432] [2025-02-05 16:04:44,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:04:44,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 16:04:44,517 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-05 16:04:44,552 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-05 16:04:44,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:04:44,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 16:04:44,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155041458] [2025-02-05 16:04:44,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 16:04:44,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 16:04:44,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 16:04:44,560 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 16:04:44,563 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 16:04:44,612 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-05 16:04:44,654 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-05 16:04:44,654 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 16:04:44,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 16:04:44,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 92 conjuncts are in the unsatisfiable core [2025-02-05 16:04:44,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 16:04:44,666 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 16:04:44,794 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 16:04:44,799 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 21 treesize of output 15 [2025-02-05 16:04:44,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2025-02-05 16:04:44,919 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 31 treesize of output 27 [2025-02-05 16:04:44,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2025-02-05 16:04:45,933 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 16:04:46,066 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 93 treesize of output 57 [2025-02-05 16:04:46,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-05 16:04:46,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 104 [2025-02-05 16:04:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 16:04:47,238 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 16:04:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 16:04:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885522432] [2025-02-05 16:04:50,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 16:04:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155041458] [2025-02-05 16:04:50,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155041458] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 16:04:50,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 16:04:50,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2025-02-05 16:04:50,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873295774] [2025-02-05 16:04:50,166 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 16:04:50,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-05 16:04:50,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 16:04:50,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-05 16:04:50,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2025-02-05 16:04:50,167 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 25 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 16:04:56,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 6.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-02-05 16:05:00,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]