./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d 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_geo2-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 50e0d41004ce88a8f3ef708f136426d09103c1930174c9041afa0700d3101d58 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 21:09:47,882 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 21:09:47,953 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 21:09:47,961 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 21:09:47,961 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 21:09:47,992 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 21:09:47,993 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 21:09:47,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 21:09:47,994 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 21:09:47,994 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 21:09:47,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 21:09:47,994 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 21:09:47,994 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 21:09:47,995 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 21:09:47,995 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 21:09:47,995 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 21:09:47,996 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 21:09:47,996 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 21:09:47,996 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 21:09:47,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 21:09:47,996 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 21:09:47,996 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 21:09:47,996 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 21:09:47,996 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 21:09:47,996 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 21:09:47,996 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 21:09:47,996 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 21:09:47,996 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 21:09:47,997 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:09:47,997 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 21:09:47,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 21:09:47,997 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 -> 50e0d41004ce88a8f3ef708f136426d09103c1930174c9041afa0700d3101d58 [2025-02-07 21:09:48,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 21:09:48,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 21:09:48,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 21:09:48,295 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 21:09:48,295 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 21:09:48,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c [2025-02-07 21:09:49,636 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6a54c93d3/d1a2249be1fc47a2af3b3f371fb59679/FLAG6d3d92fd4 [2025-02-07 21:09:49,902 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 21:09:49,903 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c [2025-02-07 21:09:49,911 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6a54c93d3/d1a2249be1fc47a2af3b3f371fb59679/FLAG6d3d92fd4 [2025-02-07 21:09:49,924 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6a54c93d3/d1a2249be1fc47a2af3b3f371fb59679 [2025-02-07 21:09:49,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 21:09:49,927 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 21:09:49,928 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 21:09:49,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 21:09:49,931 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 21:09:49,932 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:09:49" (1/1) ... [2025-02-07 21:09:49,932 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@166b273e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:49, skipping insertion in model container [2025-02-07 21:09:49,932 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 09:09:49" (1/1) ... [2025-02-07 21:09:49,947 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 21:09:50,081 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_geo2-ll.c[1055,1068] [2025-02-07 21:09:50,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:09:50,111 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 21:09:50,121 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_geo2-ll.c[1055,1068] [2025-02-07 21:09:50,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 21:09:50,144 INFO L204 MainTranslator]: Completed translation [2025-02-07 21:09:50,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50 WrapperNode [2025-02-07 21:09:50,146 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 21:09:50,148 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 21:09:50,148 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 21:09:50,148 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 21:09:50,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (1/1) ... [2025-02-07 21:09:50,159 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (1/1) ... [2025-02-07 21:09:50,175 INFO L138 Inliner]: procedures = 16, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2025-02-07 21:09:50,176 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 21:09:50,176 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 21:09:50,176 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 21:09:50,176 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 21:09:50,182 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (1/1) ... [2025-02-07 21:09:50,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (1/1) ... [2025-02-07 21:09:50,185 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (1/1) ... [2025-02-07 21:09:50,207 INFO L175 MemorySlicer]: Split 27 memory accesses to 6 slices as follows [2, 4, 5, 7, 7, 2]. 26 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 8 writes are split as follows [0, 2, 2, 1, 2, 1]. [2025-02-07 21:09:50,208 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (1/1) ... [2025-02-07 21:09:50,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (1/1) ... [2025-02-07 21:09:50,218 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (1/1) ... [2025-02-07 21:09:50,219 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (1/1) ... [2025-02-07 21:09:50,220 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (1/1) ... [2025-02-07 21:09:50,224 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (1/1) ... [2025-02-07 21:09:50,226 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 21:09:50,227 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 21:09:50,230 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 21:09:50,230 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 21:09:50,231 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (1/1) ... [2025-02-07 21:09:50,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 21:09:50,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:09:50,261 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) [2025-02-07 21:09:50,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 21:09:50,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-02-07 21:09:50,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-02-07 21:09:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_38_0 [2025-02-07 21:09:50,284 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_38_0 [2025-02-07 21:09:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 21:09:50,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 21:09:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-07 21:09:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-07 21:09:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-02-07 21:09:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-02-07 21:09:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-02-07 21:09:50,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-02-07 21:09:50,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-07 21:09:50,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-07 21:09:50,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-02-07 21:09:50,361 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 21:09:50,363 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 21:09:50,509 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L77: call ULTIMATE.dealloc(main_~#z~0#1.base, main_~#z~0#1.offset);havoc main_~#z~0#1.base, main_~#z~0#1.offset;call ULTIMATE.dealloc(main_~#k~0#1.base, main_~#k~0#1.offset);havoc main_~#k~0#1.base, main_~#k~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;call ULTIMATE.dealloc(main_~#c~0#1.base, main_~#c~0#1.offset);havoc main_~#c~0#1.base, main_~#c~0#1.offset; [2025-02-07 21:09:50,533 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-02-07 21:09:50,533 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 21:09:50,540 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 21:09:50,540 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 21:09:50,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:09:50 BoogieIcfgContainer [2025-02-07 21:09:50,540 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 21:09:50,542 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 21:09:50,542 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 21:09:50,546 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 21:09:50,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 09:09:49" (1/3) ... [2025-02-07 21:09:50,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149e0593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:09:50, skipping insertion in model container [2025-02-07 21:09:50,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 09:09:50" (2/3) ... [2025-02-07 21:09:50,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149e0593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 09:09:50, skipping insertion in model container [2025-02-07 21:09:50,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 09:09:50" (3/3) ... [2025-02-07 21:09:50,548 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_geo2-ll.c [2025-02-07 21:09:50,558 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 21:09:50,560 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_geo2-ll.c that has 3 procedures, 22 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-07 21:09:50,598 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 21:09:50,607 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;@71389194, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 21:09:50,608 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 21:09:50,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-07 21:09:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 21:09:50,616 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:09:50,616 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:09:50,617 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:09:50,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:09:50,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1901307864, now seen corresponding path program 1 times [2025-02-07 21:09:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:09:50,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919138133] [2025-02-07 21:09:50,630 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:09:50,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:09:50,731 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 21:09:50,798 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 21:09:50,800 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:09:50,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 21:09:50,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848515680] [2025-02-07 21:09:50,808 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:09:50,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:09:50,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:09:50,811 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) [2025-02-07 21:09:50,813 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 [2025-02-07 21:09:50,893 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 21:09:50,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 21:09:50,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:09:50,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:09:50,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-02-07 21:09:50,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:09:51,020 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 [2025-02-07 21:09:51,033 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 [2025-02-07 21:09:51,039 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 [2025-02-07 21:09:51,152 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 [2025-02-07 21:09:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:09:51,232 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 21:09:51,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:09:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919138133] [2025-02-07 21:09:51,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 21:09:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848515680] [2025-02-07 21:09:51,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848515680] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 21:09:51,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 21:09:51,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-02-07 21:09:51,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951991835] [2025-02-07 21:09:51,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 21:09:51,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 21:09:51,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:09:51,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 21:09:51,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-02-07 21:09:51,260 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 21:09:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 21:09:51,466 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2025-02-07 21:09:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 21:09:51,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-07 21:09:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 21:09:51,474 INFO L225 Difference]: With dead ends: 54 [2025-02-07 21:09:51,474 INFO L226 Difference]: Without dead ends: 30 [2025-02-07 21:09:51,478 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-02-07 21:09:51,482 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 21:09:51,483 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 21:09:51,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-07 21:09:51,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2025-02-07 21:09:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2025-02-07 21:09:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2025-02-07 21:09:51,518 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 8 [2025-02-07 21:09:51,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 21:09:51,518 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2025-02-07 21:09:51,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 21:09:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2025-02-07 21:09:51,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-07 21:09:51,519 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 21:09:51,519 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 21:09:51,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 21:09:51,724 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 [2025-02-07 21:09:51,724 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 21:09:51,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 21:09:51,725 INFO L85 PathProgramCache]: Analyzing trace with hash 75023234, now seen corresponding path program 1 times [2025-02-07 21:09:51,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 21:09:51,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926031125] [2025-02-07 21:09:51,725 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:09:51,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 21:09:51,752 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 21:09:51,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 21:09:51,845 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:09:51,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 21:09:51,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12191414] [2025-02-07 21:09:51,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 21:09:51,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 21:09:51,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 21:09:51,854 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) [2025-02-07 21:09:51,858 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 [2025-02-07 21:09:51,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-07 21:09:52,051 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 21:09:52,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 21:09:52,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 21:09:52,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 104 conjuncts are in the unsatisfiable core [2025-02-07 21:09:52,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 21:09:52,076 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 [2025-02-07 21:09:52,081 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 [2025-02-07 21:09:52,087 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 [2025-02-07 21:09:52,228 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 25 treesize of output 17 [2025-02-07 21:09:52,235 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 15 [2025-02-07 21:09:52,321 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 23 [2025-02-07 21:09:52,328 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 46 treesize of output 26 [2025-02-07 21:09:52,337 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 [2025-02-07 21:09:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:09:52,411 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 21:10:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 21:10:01,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 21:10:01,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926031125] [2025-02-07 21:10:01,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 21:10:01,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12191414] [2025-02-07 21:10:01,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12191414] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 21:10:01,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 21:10:01,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2025-02-07 21:10:01,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464680206] [2025-02-07 21:10:01,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 21:10:01,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-07 21:10:01,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 21:10:01,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-07 21:10:01,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=290, Unknown=2, NotChecked=0, Total=342 [2025-02-07 21:10:01,155 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 19 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 21:10:05,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-02-07 21:10:09,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-02-07 21:10:28,322 WARN L286 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 21:10:40,393 WARN L286 SmtUtils]: Spent 9.38s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 21:10:44,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-02-07 21:10:48,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-02-07 21:10:52,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-02-07 21:10:56,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-02-07 21:11:21,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-02-07 21:11:25,266 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 []