./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e2d96ac7da90505ebe789a14ca36a5b916234d7d0d8ab11cf581076a8deb0195 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 10:19:35,565 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 10:19:35,620 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 10:19:35,624 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 10:19:35,624 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 10:19:35,646 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 10:19:35,647 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 10:19:35,647 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 10:19:35,647 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 10:19:35,647 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 10:19:35,647 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 10:19:35,647 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 10:19:35,647 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 10:19:35,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 10:19:35,649 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 10:19:35,649 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 10:19:35,649 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 10:19:35,649 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 10:19:35,649 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 10:19:35,649 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 10:19:35,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 10:19:35,650 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 10:19:35,650 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 10:19:35,650 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 10:19:35,650 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 10:19:35,650 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 10:19:35,650 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 10:19:35,650 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 10:19:35,650 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 10:19:35,650 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 10:19:35,650 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 10:19:35,650 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 10:19:35,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 10:19:35,651 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 10:19:35,651 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 10:19:35,651 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 10:19:35,651 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 10:19:35,651 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 10:19:35,651 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 10:19:35,651 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 10:19:35,651 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 10:19:35,651 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 10:19:35,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 10:19:35,651 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2d96ac7da90505ebe789a14ca36a5b916234d7d0d8ab11cf581076a8deb0195 [2025-03-17 10:19:35,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 10:19:35,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 10:19:35,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 10:19:35,874 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 10:19:35,874 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 10:19:35,875 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i [2025-03-17 10:19:37,044 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffdded35f/760061d5a9164899a230a0e22bb86485/FLAG63994b5fc [2025-03-17 10:19:37,392 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 10:19:37,394 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i [2025-03-17 10:19:37,416 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffdded35f/760061d5a9164899a230a0e22bb86485/FLAG63994b5fc [2025-03-17 10:19:37,431 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffdded35f/760061d5a9164899a230a0e22bb86485 [2025-03-17 10:19:37,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 10:19:37,435 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 10:19:37,436 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 10:19:37,437 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 10:19:37,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 10:19:37,440 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:19:37" (1/1) ... [2025-03-17 10:19:37,443 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50552dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:37, skipping insertion in model container [2025-03-17 10:19:37,443 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:19:37" (1/1) ... [2025-03-17 10:19:37,483 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 10:19:37,756 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i[33022,33035] [2025-03-17 10:19:37,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 10:19:37,919 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 10:19:37,951 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-2.i[33022,33035] [2025-03-17 10:19:38,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 10:19:38,047 INFO L204 MainTranslator]: Completed translation [2025-03-17 10:19:38,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38 WrapperNode [2025-03-17 10:19:38,048 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 10:19:38,049 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 10:19:38,049 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 10:19:38,049 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 10:19:38,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (1/1) ... [2025-03-17 10:19:38,087 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (1/1) ... [2025-03-17 10:19:38,186 INFO L138 Inliner]: procedures = 177, calls = 557, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3464 [2025-03-17 10:19:38,186 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 10:19:38,187 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 10:19:38,187 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 10:19:38,188 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 10:19:38,193 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (1/1) ... [2025-03-17 10:19:38,194 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (1/1) ... [2025-03-17 10:19:38,208 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (1/1) ... [2025-03-17 10:19:38,326 INFO L175 MemorySlicer]: Split 528 memory accesses to 3 slices as follows [2, 420, 106]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 94 writes are split as follows [0, 90, 4]. [2025-03-17 10:19:38,326 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (1/1) ... [2025-03-17 10:19:38,326 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (1/1) ... [2025-03-17 10:19:38,387 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (1/1) ... [2025-03-17 10:19:38,394 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (1/1) ... [2025-03-17 10:19:38,406 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (1/1) ... [2025-03-17 10:19:38,413 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (1/1) ... [2025-03-17 10:19:38,431 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 10:19:38,432 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 10:19:38,432 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 10:19:38,432 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 10:19:38,433 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (1/1) ... [2025-03-17 10:19:38,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 10:19:38,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 10:19:38,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 10:19:38,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 10:19:38,474 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2025-03-17 10:19:38,475 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-17 10:19:38,475 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2025-03-17 10:19:38,475 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2025-03-17 10:19:38,475 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2025-03-17 10:19:38,475 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-17 10:19:38,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-17 10:19:38,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 10:19:38,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 10:19:38,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-17 10:19:38,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 10:19:38,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 10:19:38,718 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 10:19:38,720 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 10:19:41,000 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L731: call ULTIMATE.dealloc(main_~#i~0#1.base, main_~#i~0#1.offset);havoc main_~#i~0#1.base, main_~#i~0#1.offset; [2025-03-17 10:19:41,160 INFO L? ?]: Removed 806 outVars from TransFormulas that were not future-live. [2025-03-17 10:19:41,161 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 10:19:41,250 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 10:19:41,250 INFO L336 CfgBuilder]: Removed 2 assume(true) statements. [2025-03-17 10:19:41,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 10:19:41 BoogieIcfgContainer [2025-03-17 10:19:41,254 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 10:19:41,256 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 10:19:41,256 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 10:19:41,259 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 10:19:41,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 10:19:37" (1/3) ... [2025-03-17 10:19:41,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12de88bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:19:41, skipping insertion in model container [2025-03-17 10:19:41,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:19:38" (2/3) ... [2025-03-17 10:19:41,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12de88bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:19:41, skipping insertion in model container [2025-03-17 10:19:41,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 10:19:41" (3/3) ... [2025-03-17 10:19:41,261 INFO L128 eAbstractionObserver]: Analyzing ICFG uthash_BER_test10-2.i [2025-03-17 10:19:41,270 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 10:19:41,271 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG uthash_BER_test10-2.i that has 6 procedures, 1056 locations, 1 initial locations, 83 loop locations, and 1 error locations. [2025-03-17 10:19:41,373 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 10:19:41,380 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;@7ef73f20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 10:19:41,380 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-17 10:19:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 1048 states, 1029 states have (on average 1.6258503401360545) internal successors, (1673), 1034 states have internal predecessors, (1673), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-17 10:19:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-17 10:19:41,389 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:19:41,389 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:19:41,390 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:19:41,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:19:41,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2010662633, now seen corresponding path program 1 times [2025-03-17 10:19:41,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:19:41,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885475919] [2025-03-17 10:19:41,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:41,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:19:41,469 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 10:19:41,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 10:19:41,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:41,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 10:19:41,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:19:41,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885475919] [2025-03-17 10:19:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885475919] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:19:41,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:19:41,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 10:19:41,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939070030] [2025-03-17 10:19:41,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:19:41,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 10:19:41,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:19:41,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 10:19:41,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 10:19:41,542 INFO L87 Difference]: Start difference. First operand has 1048 states, 1029 states have (on average 1.6258503401360545) internal successors, (1673), 1034 states have internal predecessors, (1673), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 10:19:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:19:41,738 INFO L93 Difference]: Finished difference Result 2095 states and 3409 transitions. [2025-03-17 10:19:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 10:19:41,740 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 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 12 [2025-03-17 10:19:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:19:41,755 INFO L225 Difference]: With dead ends: 2095 [2025-03-17 10:19:41,756 INFO L226 Difference]: Without dead ends: 1011 [2025-03-17 10:19:41,762 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 10:19:41,764 INFO L435 NwaCegarLoop]: 1425 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 10:19:41,767 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1425 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 10:19:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2025-03-17 10:19:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1011. [2025-03-17 10:19:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 993 states have (on average 1.4793554884189326) internal successors, (1469), 998 states have internal predecessors, (1469), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 10:19:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1496 transitions. [2025-03-17 10:19:41,831 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1496 transitions. Word has length 12 [2025-03-17 10:19:41,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:19:41,831 INFO L471 AbstractCegarLoop]: Abstraction has 1011 states and 1496 transitions. [2025-03-17 10:19:41,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 10:19:41,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1496 transitions. [2025-03-17 10:19:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-17 10:19:41,835 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:19:41,835 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:19:41,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 10:19:41,835 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:19:41,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:19:41,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2083463603, now seen corresponding path program 1 times [2025-03-17 10:19:41,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:19:41,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768819306] [2025-03-17 10:19:41,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:41,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:19:41,856 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-17 10:19:41,870 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-17 10:19:41,870 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:41,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 10:19:42,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:19:42,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768819306] [2025-03-17 10:19:42,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768819306] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:19:42,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:19:42,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 10:19:42,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914126276] [2025-03-17 10:19:42,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:19:42,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 10:19:42,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:19:42,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 10:19:42,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 10:19:42,229 INFO L87 Difference]: Start difference. First operand 1011 states and 1496 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 10:19:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:19:42,661 INFO L93 Difference]: Finished difference Result 2017 states and 2987 transitions. [2025-03-17 10:19:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 10:19:42,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 1 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 65 [2025-03-17 10:19:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:19:42,669 INFO L225 Difference]: With dead ends: 2017 [2025-03-17 10:19:42,669 INFO L226 Difference]: Without dead ends: 1391 [2025-03-17 10:19:42,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 10:19:42,672 INFO L435 NwaCegarLoop]: 1411 mSDtfsCounter, 542 mSDsluCounter, 2717 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 4128 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 10:19:42,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 4128 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 10:19:42,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2025-03-17 10:19:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1013. [2025-03-17 10:19:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 995 states have (on average 1.478391959798995) internal successors, (1471), 1000 states have internal predecessors, (1471), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 10:19:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1498 transitions. [2025-03-17 10:19:42,705 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1498 transitions. Word has length 65 [2025-03-17 10:19:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:19:42,705 INFO L471 AbstractCegarLoop]: Abstraction has 1013 states and 1498 transitions. [2025-03-17 10:19:42,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 10:19:42,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1498 transitions. [2025-03-17 10:19:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2025-03-17 10:19:42,714 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:19:42,714 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:19:42,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 10:19:42,714 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:19:42,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:19:42,715 INFO L85 PathProgramCache]: Analyzing trace with hash -447013746, now seen corresponding path program 1 times [2025-03-17 10:19:42,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:19:42,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454934168] [2025-03-17 10:19:42,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:42,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:19:42,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 140 statements into 1 equivalence classes. [2025-03-17 10:19:42,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 140 of 140 statements. [2025-03-17 10:19:42,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:42,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 10:19:43,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:19:43,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454934168] [2025-03-17 10:19:43,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454934168] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:19:43,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:19:43,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 10:19:43,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702820525] [2025-03-17 10:19:43,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:19:43,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 10:19:43,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:19:43,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 10:19:43,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 10:19:43,185 INFO L87 Difference]: Start difference. First operand 1013 states and 1498 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 10:19:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:19:43,523 INFO L93 Difference]: Finished difference Result 2401 states and 3546 transitions. [2025-03-17 10:19:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 10:19:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (2), 1 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 140 [2025-03-17 10:19:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:19:43,529 INFO L225 Difference]: With dead ends: 2401 [2025-03-17 10:19:43,530 INFO L226 Difference]: Without dead ends: 1391 [2025-03-17 10:19:43,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 10:19:43,534 INFO L435 NwaCegarLoop]: 1411 mSDtfsCounter, 538 mSDsluCounter, 2717 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 4128 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 10:19:43,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 4128 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 10:19:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2025-03-17 10:19:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1016. [2025-03-17 10:19:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 998 states have (on average 1.4769539078156313) internal successors, (1474), 1003 states have internal predecessors, (1474), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 10:19:43,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1501 transitions. [2025-03-17 10:19:43,570 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1501 transitions. Word has length 140 [2025-03-17 10:19:43,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:19:43,571 INFO L471 AbstractCegarLoop]: Abstraction has 1016 states and 1501 transitions. [2025-03-17 10:19:43,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 10:19:43,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1501 transitions. [2025-03-17 10:19:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2025-03-17 10:19:43,574 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:19:43,574 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:19:43,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 10:19:43,576 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:19:43,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:19:43,577 INFO L85 PathProgramCache]: Analyzing trace with hash -994193565, now seen corresponding path program 1 times [2025-03-17 10:19:43,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:19:43,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44532671] [2025-03-17 10:19:43,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:43,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:19:43,664 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 209 statements into 1 equivalence classes. [2025-03-17 10:19:43,673 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 209 of 209 statements. [2025-03-17 10:19:43,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:43,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 10:19:43,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:19:43,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44532671] [2025-03-17 10:19:43,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44532671] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:19:43,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:19:43,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 10:19:43,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788773440] [2025-03-17 10:19:43,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:19:43,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 10:19:43,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:19:43,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 10:19:43,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 10:19:43,912 INFO L87 Difference]: Start difference. First operand 1016 states and 1501 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 10:19:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:19:44,170 INFO L93 Difference]: Finished difference Result 1984 states and 2930 transitions. [2025-03-17 10:19:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 10:19:44,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 1 states have call successors, (2), 1 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 209 [2025-03-17 10:19:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:19:44,174 INFO L225 Difference]: With dead ends: 1984 [2025-03-17 10:19:44,174 INFO L226 Difference]: Without dead ends: 974 [2025-03-17 10:19:44,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 10:19:44,176 INFO L435 NwaCegarLoop]: 1284 mSDtfsCounter, 30 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 10:19:44,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 3833 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 10:19:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2025-03-17 10:19:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 974. [2025-03-17 10:19:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 956 states have (on average 1.461297071129707) internal successors, (1397), 961 states have internal predecessors, (1397), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-17 10:19:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1424 transitions. [2025-03-17 10:19:44,194 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1424 transitions. Word has length 209 [2025-03-17 10:19:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:19:44,194 INFO L471 AbstractCegarLoop]: Abstraction has 974 states and 1424 transitions. [2025-03-17 10:19:44,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 10:19:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1424 transitions. [2025-03-17 10:19:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2025-03-17 10:19:44,196 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:19:44,197 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:19:44,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 10:19:44,197 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:19:44,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:19:44,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1733001187, now seen corresponding path program 1 times [2025-03-17 10:19:44,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:19:44,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046516127] [2025-03-17 10:19:44,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:44,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:19:44,271 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 209 statements into 1 equivalence classes. [2025-03-17 10:19:44,294 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 209 of 209 statements. [2025-03-17 10:19:44,294 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:44,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 10:19:44,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:19:44,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046516127] [2025-03-17 10:19:44,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046516127] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:19:44,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:19:44,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 10:19:44,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341328746] [2025-03-17 10:19:44,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:19:44,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 10:19:44,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:19:44,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 10:19:44,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 10:19:44,481 INFO L87 Difference]: Start difference. First operand 974 states and 1424 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 10:19:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:19:44,817 INFO L93 Difference]: Finished difference Result 2465 states and 3617 transitions. [2025-03-17 10:19:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 10:19:44,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 1 states have call successors, (2), 1 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 209 [2025-03-17 10:19:44,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:19:44,826 INFO L225 Difference]: With dead ends: 2465 [2025-03-17 10:19:44,826 INFO L226 Difference]: Without dead ends: 1497 [2025-03-17 10:19:44,829 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 10:19:44,830 INFO L435 NwaCegarLoop]: 1300 mSDtfsCounter, 710 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 10:19:44,830 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 2582 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 10:19:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2025-03-17 10:19:44,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1340. [2025-03-17 10:19:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1320 states have (on average 1.4643939393939394) internal successors, (1933), 1325 states have internal predecessors, (1933), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-17 10:19:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1964 transitions. [2025-03-17 10:19:44,875 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1964 transitions. Word has length 209 [2025-03-17 10:19:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:19:44,875 INFO L471 AbstractCegarLoop]: Abstraction has 1340 states and 1964 transitions. [2025-03-17 10:19:44,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 10:19:44,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1964 transitions. [2025-03-17 10:19:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2025-03-17 10:19:44,879 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:19:44,879 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:19:44,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 10:19:44,879 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:19:44,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:19:44,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1333126580, now seen corresponding path program 1 times [2025-03-17 10:19:44,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:19:44,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015297866] [2025-03-17 10:19:44,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:44,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:19:44,953 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 224 statements into 1 equivalence classes. [2025-03-17 10:19:44,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 224 of 224 statements. [2025-03-17 10:19:44,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:44,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 10:19:45,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:19:45,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015297866] [2025-03-17 10:19:45,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015297866] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:19:45,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:19:45,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 10:19:45,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984795330] [2025-03-17 10:19:45,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:19:45,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 10:19:45,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:19:45,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 10:19:45,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 10:19:45,252 INFO L87 Difference]: Start difference. First operand 1340 states and 1964 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-17 10:19:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:19:45,500 INFO L93 Difference]: Finished difference Result 2549 states and 3742 transitions. [2025-03-17 10:19:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 10:19:45,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 2 states have call successors, (4), 2 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 224 [2025-03-17 10:19:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:19:45,508 INFO L225 Difference]: With dead ends: 2549 [2025-03-17 10:19:45,508 INFO L226 Difference]: Without dead ends: 1298 [2025-03-17 10:19:45,510 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 10:19:45,511 INFO L435 NwaCegarLoop]: 1210 mSDtfsCounter, 30 mSDsluCounter, 2401 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3611 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 10:19:45,512 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 3611 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 10:19:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2025-03-17 10:19:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1298. [2025-03-17 10:19:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1278 states have (on average 1.4522691705790298) internal successors, (1856), 1283 states have internal predecessors, (1856), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-17 10:19:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1887 transitions. [2025-03-17 10:19:45,544 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1887 transitions. Word has length 224 [2025-03-17 10:19:45,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:19:45,544 INFO L471 AbstractCegarLoop]: Abstraction has 1298 states and 1887 transitions. [2025-03-17 10:19:45,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-17 10:19:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1887 transitions. [2025-03-17 10:19:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2025-03-17 10:19:45,547 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:19:45,547 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:19:45,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 10:19:45,547 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:19:45,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:19:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2097516229, now seen corresponding path program 1 times [2025-03-17 10:19:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:19:45,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335838058] [2025-03-17 10:19:45,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:45,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:19:45,606 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 224 statements into 1 equivalence classes. [2025-03-17 10:19:45,646 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 224 of 224 statements. [2025-03-17 10:19:45,646 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:45,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 10:19:45,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:19:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335838058] [2025-03-17 10:19:45,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335838058] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:19:45,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:19:45,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 10:19:45,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398288980] [2025-03-17 10:19:45,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:19:45,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 10:19:45,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:19:45,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 10:19:45,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 10:19:45,803 INFO L87 Difference]: Start difference. First operand 1298 states and 1887 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-17 10:19:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:19:46,042 INFO L93 Difference]: Finished difference Result 3069 states and 4479 transitions. [2025-03-17 10:19:46,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 10:19:46,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (4), 2 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 224 [2025-03-17 10:19:46,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:19:46,049 INFO L225 Difference]: With dead ends: 3069 [2025-03-17 10:19:46,050 INFO L226 Difference]: Without dead ends: 1860 [2025-03-17 10:19:46,051 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 10:19:46,052 INFO L435 NwaCegarLoop]: 1435 mSDtfsCounter, 592 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 2644 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 10:19:46,052 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 2644 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 10:19:46,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2025-03-17 10:19:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1855. [2025-03-17 10:19:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1829 states have (on average 1.4554401312192455) internal successors, (2662), 1834 states have internal predecessors, (2662), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2025-03-17 10:19:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2705 transitions. [2025-03-17 10:19:46,092 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2705 transitions. Word has length 224 [2025-03-17 10:19:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:19:46,093 INFO L471 AbstractCegarLoop]: Abstraction has 1855 states and 2705 transitions. [2025-03-17 10:19:46,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-17 10:19:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2705 transitions. [2025-03-17 10:19:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2025-03-17 10:19:46,095 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:19:46,096 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:19:46,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 10:19:46,096 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:19:46,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:19:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1573087889, now seen corresponding path program 1 times [2025-03-17 10:19:46,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:19:46,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309645524] [2025-03-17 10:19:46,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:46,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:19:46,172 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 239 statements into 1 equivalence classes. [2025-03-17 10:19:46,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 239 of 239 statements. [2025-03-17 10:19:46,205 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:46,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-17 10:19:46,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:19:46,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309645524] [2025-03-17 10:19:46,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309645524] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:19:46,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:19:46,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 10:19:46,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194917892] [2025-03-17 10:19:46,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:19:46,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 10:19:46,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:19:46,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 10:19:46,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 10:19:46,392 INFO L87 Difference]: Start difference. First operand 1855 states and 2705 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-17 10:19:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:19:46,851 INFO L93 Difference]: Finished difference Result 3055 states and 4461 transitions. [2025-03-17 10:19:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 10:19:46,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 239 [2025-03-17 10:19:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:19:46,858 INFO L225 Difference]: With dead ends: 3055 [2025-03-17 10:19:46,858 INFO L226 Difference]: Without dead ends: 1432 [2025-03-17 10:19:46,860 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 10:19:46,860 INFO L435 NwaCegarLoop]: 1255 mSDtfsCounter, 2348 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2348 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 10:19:46,861 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2348 Valid, 1435 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 10:19:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2025-03-17 10:19:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1432. [2025-03-17 10:19:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1411 states have (on average 1.440822111977321) internal successors, (2033), 1416 states have internal predecessors, (2033), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-17 10:19:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2066 transitions. [2025-03-17 10:19:46,894 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2066 transitions. Word has length 239 [2025-03-17 10:19:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:19:46,895 INFO L471 AbstractCegarLoop]: Abstraction has 1432 states and 2066 transitions. [2025-03-17 10:19:46,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-17 10:19:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2066 transitions. [2025-03-17 10:19:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2025-03-17 10:19:46,898 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:19:46,898 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:19:46,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 10:19:46,898 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:19:46,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:19:46,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1653875101, now seen corresponding path program 1 times [2025-03-17 10:19:46,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:19:46,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110282821] [2025-03-17 10:19:46,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:46,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:19:46,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 249 statements into 1 equivalence classes. [2025-03-17 10:19:46,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 249 of 249 statements. [2025-03-17 10:19:46,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:46,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-17 10:19:47,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:19:47,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110282821] [2025-03-17 10:19:47,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110282821] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:19:47,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:19:47,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 10:19:47,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231956407] [2025-03-17 10:19:47,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:19:47,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 10:19:47,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:19:47,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 10:19:47,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 10:19:47,237 INFO L87 Difference]: Start difference. First operand 1432 states and 2066 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:19:47,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:19:47,447 INFO L93 Difference]: Finished difference Result 2296 states and 3355 transitions. [2025-03-17 10:19:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 10:19:47,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 249 [2025-03-17 10:19:47,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:19:47,453 INFO L225 Difference]: With dead ends: 2296 [2025-03-17 10:19:47,453 INFO L226 Difference]: Without dead ends: 1390 [2025-03-17 10:19:47,454 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 10:19:47,455 INFO L435 NwaCegarLoop]: 1134 mSDtfsCounter, 30 mSDsluCounter, 2249 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3383 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 10:19:47,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 3383 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 10:19:47,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2025-03-17 10:19:47,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1390. [2025-03-17 10:19:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1369 states have (on average 1.4287801314828341) internal successors, (1956), 1374 states have internal predecessors, (1956), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-17 10:19:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1989 transitions. [2025-03-17 10:19:47,482 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1989 transitions. Word has length 249 [2025-03-17 10:19:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:19:47,482 INFO L471 AbstractCegarLoop]: Abstraction has 1390 states and 1989 transitions. [2025-03-17 10:19:47,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:19:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1989 transitions. [2025-03-17 10:19:47,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2025-03-17 10:19:47,485 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:19:47,485 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:19:47,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 10:19:47,485 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:19:47,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:19:47,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1255148476, now seen corresponding path program 1 times [2025-03-17 10:19:47,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:19:47,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675630788] [2025-03-17 10:19:47,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:47,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:19:47,544 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 249 statements into 1 equivalence classes. [2025-03-17 10:19:47,648 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 249 of 249 statements. [2025-03-17 10:19:47,649 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:47,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-17 10:19:48,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:19:48,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675630788] [2025-03-17 10:19:48,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675630788] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 10:19:48,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273110833] [2025-03-17 10:19:48,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:48,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 10:19:48,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 10:19:48,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 10:19:48,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 10:19:48,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 249 statements into 1 equivalence classes. [2025-03-17 10:19:48,864 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 249 of 249 statements. [2025-03-17 10:19:48,864 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:48,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:48,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 10:19:48,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 10:19:49,277 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 36 treesize of output 13 [2025-03-17 10:19:49,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 10:19:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-17 10:19:49,307 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 10:19:49,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273110833] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:19:49,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 10:19:49,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2025-03-17 10:19:49,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070479730] [2025-03-17 10:19:49,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:19:49,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 10:19:49,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:19:49,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 10:19:49,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2025-03-17 10:19:49,311 INFO L87 Difference]: Start difference. First operand 1390 states and 1989 transitions. Second operand has 7 states, 7 states have (on average 32.857142857142854) internal successors, (230), 7 states have internal predecessors, (230), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:19:53,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 10:19:54,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-17 10:19:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:19:55,001 INFO L93 Difference]: Finished difference Result 2576 states and 3701 transitions. [2025-03-17 10:19:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 10:19:55,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 32.857142857142854) internal successors, (230), 7 states have internal predecessors, (230), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 249 [2025-03-17 10:19:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:19:55,009 INFO L225 Difference]: With dead ends: 2576 [2025-03-17 10:19:55,009 INFO L226 Difference]: Without dead ends: 1709 [2025-03-17 10:19:55,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 238 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2025-03-17 10:19:55,012 INFO L435 NwaCegarLoop]: 1092 mSDtfsCounter, 1854 mSDsluCounter, 3007 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1862 SdHoareTripleChecker+Valid, 4099 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2025-03-17 10:19:55,012 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1862 Valid, 4099 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 637 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2025-03-17 10:19:55,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2025-03-17 10:19:55,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1558. [2025-03-17 10:19:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1527 states have (on average 1.4204322200392927) internal successors, (2169), 1536 states have internal predecessors, (2169), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (23), 17 states have call predecessors, (23), 23 states have call successors, (23) [2025-03-17 10:19:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 2216 transitions. [2025-03-17 10:19:55,053 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 2216 transitions. Word has length 249 [2025-03-17 10:19:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:19:55,054 INFO L471 AbstractCegarLoop]: Abstraction has 1558 states and 2216 transitions. [2025-03-17 10:19:55,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.857142857142854) internal successors, (230), 7 states have internal predecessors, (230), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:19:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 2216 transitions. [2025-03-17 10:19:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2025-03-17 10:19:55,057 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:19:55,058 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:19:55,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 10:19:55,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-17 10:19:55,259 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:19:55,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:19:55,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2013078916, now seen corresponding path program 1 times [2025-03-17 10:19:55,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:19:55,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843425052] [2025-03-17 10:19:55,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:55,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:19:55,345 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 324 statements into 1 equivalence classes. [2025-03-17 10:19:55,436 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 324 of 324 statements. [2025-03-17 10:19:55,436 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:55,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 72 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-17 10:19:56,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:19:56,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843425052] [2025-03-17 10:19:56,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843425052] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 10:19:56,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361667388] [2025-03-17 10:19:56,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:56,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 10:19:56,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 10:19:56,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 10:19:56,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 10:19:56,717 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 324 statements into 1 equivalence classes. [2025-03-17 10:19:56,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 324 of 324 statements. [2025-03-17 10:19:56,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:56,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:19:56,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 1639 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 10:19:56,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 10:19:56,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 10:19:57,294 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 36 treesize of output 13 [2025-03-17 10:19:57,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 10:19:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 72 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-17 10:19:57,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 10:19:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 72 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-17 10:19:57,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361667388] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 10:19:57,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 10:19:57,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2025-03-17 10:19:57,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988055615] [2025-03-17 10:19:57,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 10:19:57,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 10:19:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:19:57,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 10:19:57,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2025-03-17 10:19:57,608 INFO L87 Difference]: Start difference. First operand 1558 states and 2216 transitions. Second operand has 11 states, 11 states have (on average 42.90909090909091) internal successors, (472), 11 states have internal predecessors, (472), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-17 10:19:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:19:58,344 INFO L93 Difference]: Finished difference Result 3810 states and 5370 transitions. [2025-03-17 10:19:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 10:19:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 42.90909090909091) internal successors, (472), 11 states have internal predecessors, (472), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 324 [2025-03-17 10:19:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:19:58,355 INFO L225 Difference]: With dead ends: 3810 [2025-03-17 10:19:58,356 INFO L226 Difference]: Without dead ends: 2484 [2025-03-17 10:19:58,358 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 637 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2025-03-17 10:19:58,359 INFO L435 NwaCegarLoop]: 1120 mSDtfsCounter, 2591 mSDsluCounter, 4682 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2605 SdHoareTripleChecker+Valid, 5802 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-17 10:19:58,360 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2605 Valid, 5802 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-17 10:19:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2025-03-17 10:19:58,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2202. [2025-03-17 10:19:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2159 states have (on average 1.3955534969893468) internal successors, (3013), 2168 states have internal predecessors, (3013), 35 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (34), 28 states have call predecessors, (34), 34 states have call successors, (34) [2025-03-17 10:19:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 3082 transitions. [2025-03-17 10:19:58,456 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 3082 transitions. Word has length 324 [2025-03-17 10:19:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:19:58,457 INFO L471 AbstractCegarLoop]: Abstraction has 2202 states and 3082 transitions. [2025-03-17 10:19:58,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 42.90909090909091) internal successors, (472), 11 states have internal predecessors, (472), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-17 10:19:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 3082 transitions. [2025-03-17 10:19:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 757 [2025-03-17 10:19:58,476 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:19:58,477 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:19:58,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 10:19:58,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-17 10:19:58,678 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:19:58,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:19:58,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1021981079, now seen corresponding path program 1 times [2025-03-17 10:19:58,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:19:58,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796871693] [2025-03-17 10:19:58,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:19:58,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:19:58,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 756 statements into 1 equivalence classes. [2025-03-17 10:19:59,164 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 756 of 756 statements. [2025-03-17 10:19:59,165 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:19:59,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:20:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 288 proven. 872 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-17 10:20:03,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:20:03,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796871693] [2025-03-17 10:20:03,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796871693] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 10:20:03,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503937350] [2025-03-17 10:20:03,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:20:03,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 10:20:03,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 10:20:03,361 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 10:20:03,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 10:20:03,980 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 756 statements into 1 equivalence classes. [2025-03-17 10:20:04,438 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 756 of 756 statements. [2025-03-17 10:20:04,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:20:04,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:20:04,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 3754 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 10:20:04,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 10:20:04,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 10:20:04,717 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 36 treesize of output 13 [2025-03-17 10:20:04,865 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 36 treesize of output 13 [2025-03-17 10:20:05,017 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 36 treesize of output 13 [2025-03-17 10:20:05,171 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 36 treesize of output 13 [2025-03-17 10:20:05,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 10:20:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 288 proven. 872 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-17 10:20:05,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 10:20:06,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 288 proven. 872 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-17 10:20:06,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503937350] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 10:20:06,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 10:20:06,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2025-03-17 10:20:06,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595783840] [2025-03-17 10:20:06,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 10:20:06,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 10:20:06,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:20:06,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 10:20:06,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2025-03-17 10:20:06,037 INFO L87 Difference]: Start difference. First operand 2202 states and 3082 transitions. Second operand has 21 states, 21 states have (on average 63.95238095238095) internal successors, (1343), 21 states have internal predecessors, (1343), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-17 10:20:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:20:07,198 INFO L93 Difference]: Finished difference Result 5532 states and 7701 transitions. [2025-03-17 10:20:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-17 10:20:07,199 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 63.95238095238095) internal successors, (1343), 21 states have internal predecessors, (1343), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 756 [2025-03-17 10:20:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:20:07,217 INFO L225 Difference]: With dead ends: 5532 [2025-03-17 10:20:07,217 INFO L226 Difference]: Without dead ends: 4206 [2025-03-17 10:20:07,222 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1536 GetRequests, 1500 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=286, Invalid=644, Unknown=0, NotChecked=0, Total=930 [2025-03-17 10:20:07,222 INFO L435 NwaCegarLoop]: 1120 mSDtfsCounter, 7775 mSDsluCounter, 7752 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7817 SdHoareTripleChecker+Valid, 8872 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-17 10:20:07,223 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7817 Valid, 8872 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-17 10:20:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4206 states. [2025-03-17 10:20:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4206 to 3924. [2025-03-17 10:20:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3857 states have (on average 1.3723100855587245) internal successors, (5293), 3866 states have internal predecessors, (5293), 59 states have call successors, (59), 7 states have call predecessors, (59), 7 states have return successors, (58), 52 states have call predecessors, (58), 58 states have call successors, (58) [2025-03-17 10:20:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 5410 transitions. [2025-03-17 10:20:07,332 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 5410 transitions. Word has length 756 [2025-03-17 10:20:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:20:07,333 INFO L471 AbstractCegarLoop]: Abstraction has 3924 states and 5410 transitions. [2025-03-17 10:20:07,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.95238095238095) internal successors, (1343), 21 states have internal predecessors, (1343), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-17 10:20:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 5410 transitions. [2025-03-17 10:20:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1621 [2025-03-17 10:20:07,403 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:20:07,403 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:20:07,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 10:20:07,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 10:20:07,605 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:20:07,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:20:07,606 INFO L85 PathProgramCache]: Analyzing trace with hash 582904269, now seen corresponding path program 2 times [2025-03-17 10:20:07,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:20:07,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638282593] [2025-03-17 10:20:07,606 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 10:20:07,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:20:08,076 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1620 statements into 2 equivalence classes. [2025-03-17 10:20:08,132 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 75 of 1620 statements. [2025-03-17 10:20:08,133 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 10:20:08,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:20:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7238 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7238 trivial. 0 not checked. [2025-03-17 10:20:08,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:20:08,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638282593] [2025-03-17 10:20:08,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638282593] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:20:08,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:20:08,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 10:20:08,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694997933] [2025-03-17 10:20:08,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:20:08,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 10:20:08,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:20:08,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 10:20:08,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 10:20:08,305 INFO L87 Difference]: Start difference. First operand 3924 states and 5410 transitions. Second operand has 8 states, 8 states have (on average 29.5) internal successors, (236), 8 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:20:08,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:20:08,941 INFO L93 Difference]: Finished difference Result 4785 states and 6691 transitions. [2025-03-17 10:20:08,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 10:20:08,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.5) internal successors, (236), 8 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1620 [2025-03-17 10:20:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:20:08,956 INFO L225 Difference]: With dead ends: 4785 [2025-03-17 10:20:08,956 INFO L226 Difference]: Without dead ends: 3939 [2025-03-17 10:20:08,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-03-17 10:20:08,960 INFO L435 NwaCegarLoop]: 1140 mSDtfsCounter, 52 mSDsluCounter, 5376 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 6516 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-17 10:20:08,960 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 6516 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-17 10:20:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2025-03-17 10:20:09,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3935. [2025-03-17 10:20:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3935 states, 3868 states have (on average 1.3712512926577043) internal successors, (5304), 3877 states have internal predecessors, (5304), 59 states have call successors, (59), 7 states have call predecessors, (59), 7 states have return successors, (58), 52 states have call predecessors, (58), 58 states have call successors, (58) [2025-03-17 10:20:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3935 states to 3935 states and 5421 transitions. [2025-03-17 10:20:09,153 INFO L78 Accepts]: Start accepts. Automaton has 3935 states and 5421 transitions. Word has length 1620 [2025-03-17 10:20:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:20:09,159 INFO L471 AbstractCegarLoop]: Abstraction has 3935 states and 5421 transitions. [2025-03-17 10:20:09,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.5) internal successors, (236), 8 states have internal predecessors, (236), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:20:09,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3935 states and 5421 transitions. [2025-03-17 10:20:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1622 [2025-03-17 10:20:09,197 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:20:09,198 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:20:09,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 10:20:09,199 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:20:09,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:20:09,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1216308209, now seen corresponding path program 1 times [2025-03-17 10:20:09,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:20:09,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038675315] [2025-03-17 10:20:09,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:20:09,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:20:09,639 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1621 statements into 1 equivalence classes. [2025-03-17 10:20:10,510 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1621 of 1621 statements. [2025-03-17 10:20:10,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:20:10,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:20:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7238 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7238 trivial. 0 not checked. [2025-03-17 10:20:13,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:20:13,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038675315] [2025-03-17 10:20:13,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038675315] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:20:13,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:20:13,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 10:20:13,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201691840] [2025-03-17 10:20:13,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:20:13,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 10:20:13,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:20:13,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 10:20:13,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-17 10:20:13,452 INFO L87 Difference]: Start difference. First operand 3935 states and 5421 transitions. Second operand has 8 states, 8 states have (on average 29.625) internal successors, (237), 8 states have internal predecessors, (237), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:20:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:20:13,982 INFO L93 Difference]: Finished difference Result 4779 states and 6677 transitions. [2025-03-17 10:20:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 10:20:13,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.625) internal successors, (237), 8 states have internal predecessors, (237), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1621 [2025-03-17 10:20:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:20:14,004 INFO L225 Difference]: With dead ends: 4779 [2025-03-17 10:20:14,004 INFO L226 Difference]: Without dead ends: 3943 [2025-03-17 10:20:14,007 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-03-17 10:20:14,007 INFO L435 NwaCegarLoop]: 1145 mSDtfsCounter, 25 mSDsluCounter, 5410 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 6555 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-17 10:20:14,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 6555 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-17 10:20:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2025-03-17 10:20:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3935. [2025-03-17 10:20:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3935 states, 3868 states have (on average 1.3712512926577043) internal successors, (5304), 3877 states have internal predecessors, (5304), 59 states have call successors, (59), 7 states have call predecessors, (59), 7 states have return successors, (58), 52 states have call predecessors, (58), 58 states have call successors, (58) [2025-03-17 10:20:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3935 states to 3935 states and 5421 transitions. [2025-03-17 10:20:14,085 INFO L78 Accepts]: Start accepts. Automaton has 3935 states and 5421 transitions. Word has length 1621 [2025-03-17 10:20:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:20:14,086 INFO L471 AbstractCegarLoop]: Abstraction has 3935 states and 5421 transitions. [2025-03-17 10:20:14,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.625) internal successors, (237), 8 states have internal predecessors, (237), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:20:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3935 states and 5421 transitions. [2025-03-17 10:20:14,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1622 [2025-03-17 10:20:14,104 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:20:14,104 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:20:14,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-17 10:20:14,104 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:20:14,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:20:14,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1363109192, now seen corresponding path program 1 times [2025-03-17 10:20:14,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:20:14,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115232788] [2025-03-17 10:20:14,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:20:14,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:20:14,497 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1621 statements into 1 equivalence classes. [2025-03-17 10:20:15,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1621 of 1621 statements. [2025-03-17 10:20:15,003 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:20:15,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:20:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7238 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7238 trivial. 0 not checked. [2025-03-17 10:20:18,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:20:18,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115232788] [2025-03-17 10:20:18,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115232788] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:20:18,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:20:18,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 10:20:18,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578137060] [2025-03-17 10:20:18,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:20:18,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 10:20:18,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:20:18,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 10:20:18,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 10:20:18,474 INFO L87 Difference]: Start difference. First operand 3935 states and 5421 transitions. Second operand has 7 states, 7 states have (on average 33.857142857142854) internal successors, (237), 7 states have internal predecessors, (237), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:20:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:20:18,980 INFO L93 Difference]: Finished difference Result 4785 states and 6686 transitions. [2025-03-17 10:20:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 10:20:18,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.857142857142854) internal successors, (237), 7 states have internal predecessors, (237), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1621 [2025-03-17 10:20:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:20:18,999 INFO L225 Difference]: With dead ends: 4785 [2025-03-17 10:20:19,000 INFO L226 Difference]: Without dead ends: 3940 [2025-03-17 10:20:19,002 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 10:20:19,003 INFO L435 NwaCegarLoop]: 1146 mSDtfsCounter, 21 mSDsluCounter, 4310 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 5456 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 10:20:19,003 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 5456 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 10:20:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3940 states. [2025-03-17 10:20:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3940 to 3939. [2025-03-17 10:20:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3939 states, 3872 states have (on average 1.3711260330578512) internal successors, (5309), 3881 states have internal predecessors, (5309), 59 states have call successors, (59), 7 states have call predecessors, (59), 7 states have return successors, (58), 52 states have call predecessors, (58), 58 states have call successors, (58) [2025-03-17 10:20:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 5426 transitions. [2025-03-17 10:20:19,077 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 5426 transitions. Word has length 1621 [2025-03-17 10:20:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:20:19,079 INFO L471 AbstractCegarLoop]: Abstraction has 3939 states and 5426 transitions. [2025-03-17 10:20:19,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.857142857142854) internal successors, (237), 7 states have internal predecessors, (237), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:20:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 5426 transitions. [2025-03-17 10:20:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1623 [2025-03-17 10:20:19,096 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:20:19,097 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:20:19,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-17 10:20:19,097 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:20:19,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:20:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1092543764, now seen corresponding path program 1 times [2025-03-17 10:20:19,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:20:19,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644935278] [2025-03-17 10:20:19,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:20:19,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:20:19,443 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1622 statements into 1 equivalence classes. [2025-03-17 10:20:19,967 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1622 of 1622 statements. [2025-03-17 10:20:19,968 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:20:19,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:20:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7238 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7238 trivial. 0 not checked. [2025-03-17 10:20:23,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:20:23,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644935278] [2025-03-17 10:20:23,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644935278] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:20:23,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:20:23,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 10:20:23,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476927359] [2025-03-17 10:20:23,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:20:23,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 10:20:23,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:20:23,241 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 10:20:23,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-17 10:20:23,242 INFO L87 Difference]: Start difference. First operand 3939 states and 5426 transitions. Second operand has 9 states, 9 states have (on average 26.444444444444443) internal successors, (238), 9 states have internal predecessors, (238), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:20:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:20:24,009 INFO L93 Difference]: Finished difference Result 4791 states and 6693 transitions. [2025-03-17 10:20:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 10:20:24,010 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 26.444444444444443) internal successors, (238), 9 states have internal predecessors, (238), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1622 [2025-03-17 10:20:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:20:24,027 INFO L225 Difference]: With dead ends: 4791 [2025-03-17 10:20:24,027 INFO L226 Difference]: Without dead ends: 3950 [2025-03-17 10:20:24,030 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-03-17 10:20:24,031 INFO L435 NwaCegarLoop]: 1140 mSDtfsCounter, 31 mSDsluCounter, 7610 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 8750 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-17 10:20:24,031 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 8750 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-17 10:20:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2025-03-17 10:20:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3947. [2025-03-17 10:20:24,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3947 states, 3880 states have (on average 1.3708762886597938) internal successors, (5319), 3889 states have internal predecessors, (5319), 59 states have call successors, (59), 7 states have call predecessors, (59), 7 states have return successors, (58), 52 states have call predecessors, (58), 58 states have call successors, (58) [2025-03-17 10:20:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3947 states to 3947 states and 5436 transitions. [2025-03-17 10:20:24,124 INFO L78 Accepts]: Start accepts. Automaton has 3947 states and 5436 transitions. Word has length 1622 [2025-03-17 10:20:24,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:20:24,126 INFO L471 AbstractCegarLoop]: Abstraction has 3947 states and 5436 transitions. [2025-03-17 10:20:24,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.444444444444443) internal successors, (238), 9 states have internal predecessors, (238), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:20:24,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3947 states and 5436 transitions. [2025-03-17 10:20:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1624 [2025-03-17 10:20:24,152 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:20:24,152 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:20:24,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 10:20:24,152 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:20:24,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:20:24,154 INFO L85 PathProgramCache]: Analyzing trace with hash 914066059, now seen corresponding path program 1 times [2025-03-17 10:20:24,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:20:24,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249400979] [2025-03-17 10:20:24,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:20:24,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:20:24,495 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1623 statements into 1 equivalence classes. [2025-03-17 10:20:24,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1623 of 1623 statements. [2025-03-17 10:20:24,948 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:20:24,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:20:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7238 backedges. 1961 proven. 74 refuted. 0 times theorem prover too weak. 5203 trivial. 0 not checked. [2025-03-17 10:20:29,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:20:29,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249400979] [2025-03-17 10:20:29,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249400979] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 10:20:29,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196760435] [2025-03-17 10:20:29,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:20:29,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 10:20:29,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 10:20:29,538 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 10:20:29,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 10:20:30,718 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1623 statements into 1 equivalence classes. [2025-03-17 10:20:31,545 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1623 of 1623 statements. [2025-03-17 10:20:31,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:20:31,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:20:31,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 7984 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-17 10:20:31,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 10:20:31,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 10:20:31,913 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 36 treesize of output 13 [2025-03-17 10:20:32,061 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 36 treesize of output 13 [2025-03-17 10:20:32,190 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 36 treesize of output 13 [2025-03-17 10:20:32,314 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 36 treesize of output 13 [2025-03-17 10:20:32,443 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 36 treesize of output 13 [2025-03-17 10:20:32,570 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 36 treesize of output 13 [2025-03-17 10:20:32,691 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 36 treesize of output 13 [2025-03-17 10:20:32,821 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 36 treesize of output 13 [2025-03-17 10:20:32,977 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 36 treesize of output 13 [2025-03-17 10:20:33,116 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 36 treesize of output 13 [2025-03-17 10:20:33,178 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 36 treesize of output 13 [2025-03-17 10:20:33,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 10:20:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7238 backedges. 0 proven. 7214 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-17 10:20:33,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 10:20:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7238 backedges. 0 proven. 7214 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-17 10:20:34,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196760435] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 10:20:34,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 10:20:34,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 32 [2025-03-17 10:20:34,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555793940] [2025-03-17 10:20:34,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 10:20:34,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 10:20:34,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:20:34,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 10:20:34,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=636, Unknown=0, NotChecked=0, Total=992 [2025-03-17 10:20:34,855 INFO L87 Difference]: Start difference. First operand 3947 states and 5436 transitions. Second operand has 32 states, 32 states have (on average 103.1875) internal successors, (3302), 32 states have internal predecessors, (3302), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-17 10:20:37,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:20:37,701 INFO L93 Difference]: Finished difference Result 6816 states and 9431 transitions. [2025-03-17 10:20:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2025-03-17 10:20:37,702 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 103.1875) internal successors, (3302), 32 states have internal predecessors, (3302), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 1623 [2025-03-17 10:20:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:20:37,716 INFO L225 Difference]: With dead ends: 6816 [2025-03-17 10:20:37,716 INFO L226 Difference]: Without dead ends: 5910 [2025-03-17 10:20:37,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3302 GetRequests, 3218 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1982 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1671, Invalid=4491, Unknown=0, NotChecked=0, Total=6162 [2025-03-17 10:20:37,722 INFO L435 NwaCegarLoop]: 1089 mSDtfsCounter, 13631 mSDsluCounter, 14143 mSDsCounter, 0 mSdLazyCounter, 2160 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13712 SdHoareTripleChecker+Valid, 15232 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-17 10:20:37,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13712 Valid, 15232 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2160 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-17 10:20:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5910 states. [2025-03-17 10:20:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5910 to 5910. [2025-03-17 10:20:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5910 states, 5804 states have (on average 1.3599241902136459) internal successors, (7893), 5813 states have internal predecessors, (7893), 98 states have call successors, (98), 7 states have call predecessors, (98), 7 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2025-03-17 10:20:37,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5910 states to 5910 states and 8088 transitions. [2025-03-17 10:20:37,813 INFO L78 Accepts]: Start accepts. Automaton has 5910 states and 8088 transitions. Word has length 1623 [2025-03-17 10:20:37,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:20:37,816 INFO L471 AbstractCegarLoop]: Abstraction has 5910 states and 8088 transitions. [2025-03-17 10:20:37,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 103.1875) internal successors, (3302), 32 states have internal predecessors, (3302), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-17 10:20:37,818 INFO L276 IsEmpty]: Start isEmpty. Operand 5910 states and 8088 transitions. [2025-03-17 10:20:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2599 [2025-03-17 10:20:37,851 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:20:37,852 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 14, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:20:37,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 10:20:38,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 10:20:38,053 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:20:38,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:20:38,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1193526451, now seen corresponding path program 2 times [2025-03-17 10:20:38,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:20:38,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919539907] [2025-03-17 10:20:38,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 10:20:38,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:20:38,543 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2598 statements into 2 equivalence classes. [2025-03-17 10:20:38,561 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 78 of 2598 statements. [2025-03-17 10:20:38,562 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 10:20:38,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:20:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 23813 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23813 trivial. 0 not checked. [2025-03-17 10:20:38,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:20:38,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919539907] [2025-03-17 10:20:38,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919539907] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:20:38,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:20:38,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 10:20:38,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167635079] [2025-03-17 10:20:38,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:20:38,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 10:20:38,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:20:38,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 10:20:38,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-17 10:20:38,724 INFO L87 Difference]: Start difference. First operand 5910 states and 8088 transitions. Second operand has 8 states, 8 states have (on average 29.875) internal successors, (239), 8 states have internal predecessors, (239), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:20:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:20:39,271 INFO L93 Difference]: Finished difference Result 6766 states and 9358 transitions. [2025-03-17 10:20:39,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 10:20:39,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.875) internal successors, (239), 8 states have internal predecessors, (239), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 2598 [2025-03-17 10:20:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:20:39,289 INFO L225 Difference]: With dead ends: 6766 [2025-03-17 10:20:39,290 INFO L226 Difference]: Without dead ends: 5916 [2025-03-17 10:20:39,294 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-17 10:20:39,295 INFO L435 NwaCegarLoop]: 1133 mSDtfsCounter, 411 mSDsluCounter, 4955 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 6088 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 10:20:39,296 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 6088 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 10:20:39,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5916 states. [2025-03-17 10:20:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5916 to 5910. [2025-03-17 10:20:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5910 states, 5804 states have (on average 1.3599241902136459) internal successors, (7893), 5813 states have internal predecessors, (7893), 98 states have call successors, (98), 7 states have call predecessors, (98), 7 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2025-03-17 10:20:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5910 states to 5910 states and 8088 transitions. [2025-03-17 10:20:39,414 INFO L78 Accepts]: Start accepts. Automaton has 5910 states and 8088 transitions. Word has length 2598 [2025-03-17 10:20:39,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:20:39,415 INFO L471 AbstractCegarLoop]: Abstraction has 5910 states and 8088 transitions. [2025-03-17 10:20:39,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.875) internal successors, (239), 8 states have internal predecessors, (239), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:20:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5910 states and 8088 transitions. [2025-03-17 10:20:39,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2599 [2025-03-17 10:20:39,454 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:20:39,455 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 14, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:20:39,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-17 10:20:39,455 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:20:39,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:20:39,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1790827767, now seen corresponding path program 1 times [2025-03-17 10:20:39,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:20:39,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642236739] [2025-03-17 10:20:39,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:20:39,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:20:40,082 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2598 statements into 1 equivalence classes. [2025-03-17 10:20:41,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2598 of 2598 statements. [2025-03-17 10:20:41,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:20:41,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 10:20:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 23813 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23813 trivial. 0 not checked. [2025-03-17 10:20:46,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 10:20:46,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642236739] [2025-03-17 10:20:46,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642236739] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 10:20:46,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 10:20:46,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 10:20:46,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989483860] [2025-03-17 10:20:46,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 10:20:46,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 10:20:46,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 10:20:46,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 10:20:46,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-17 10:20:46,871 INFO L87 Difference]: Start difference. First operand 5910 states and 8088 transitions. Second operand has 7 states, 7 states have (on average 34.142857142857146) internal successors, (239), 7 states have internal predecessors, (239), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:20:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 10:20:47,292 INFO L93 Difference]: Finished difference Result 6762 states and 9355 transitions. [2025-03-17 10:20:47,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 10:20:47,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 34.142857142857146) internal successors, (239), 7 states have internal predecessors, (239), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 2598 [2025-03-17 10:20:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 10:20:47,311 INFO L225 Difference]: With dead ends: 6762 [2025-03-17 10:20:47,311 INFO L226 Difference]: Without dead ends: 5915 [2025-03-17 10:20:47,316 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-17 10:20:47,316 INFO L435 NwaCegarLoop]: 1149 mSDtfsCounter, 15 mSDsluCounter, 4320 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 5469 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-17 10:20:47,316 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 5469 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-17 10:20:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2025-03-17 10:20:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5913. [2025-03-17 10:20:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5913 states, 5807 states have (on average 1.3597382469433443) internal successors, (7896), 5816 states have internal predecessors, (7896), 98 states have call successors, (98), 7 states have call predecessors, (98), 7 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2025-03-17 10:20:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5913 states to 5913 states and 8091 transitions. [2025-03-17 10:20:47,427 INFO L78 Accepts]: Start accepts. Automaton has 5913 states and 8091 transitions. Word has length 2598 [2025-03-17 10:20:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 10:20:47,432 INFO L471 AbstractCegarLoop]: Abstraction has 5913 states and 8091 transitions. [2025-03-17 10:20:47,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.142857142857146) internal successors, (239), 7 states have internal predecessors, (239), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-17 10:20:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 5913 states and 8091 transitions. [2025-03-17 10:20:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2599 [2025-03-17 10:20:47,473 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 10:20:47,473 INFO L218 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 14, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 10:20:47,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-17 10:20:47,474 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 10:20:47,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 10:20:47,475 INFO L85 PathProgramCache]: Analyzing trace with hash -60335858, now seen corresponding path program 1 times [2025-03-17 10:20:47,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 10:20:47,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900635472] [2025-03-17 10:20:47,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 10:20:47,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 10:20:48,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2598 statements into 1 equivalence classes. [2025-03-17 10:20:48,999 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2598 of 2598 statements. [2025-03-17 10:20:48,999 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 10:20:48,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat