./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c --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/recursified_loop-simple/recursified_nested_3.c -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 9a8e2b8a66923dd7d46d9db92fbd8b38c75eb8108da5237ec87b15cd1ae67985 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:56:32,881 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:56:32,930 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:56:32,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:56:32,934 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:56:32,955 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:56:32,955 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:56:32,956 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:56:32,957 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:56:32,957 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:56:32,957 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:56:32,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:56:32,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:56:32,958 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:56:32,958 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:56:32,958 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:56:32,959 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:56:32,959 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:56:32,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:56:32,959 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:56:32,959 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:56:32,959 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:56:32,959 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:56:32,959 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:56:32,959 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:56:32,959 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:56:32,959 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:56:32,959 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:56:32,960 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:56:32,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:56:32,960 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:56:32,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:56:32,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:56:32,960 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:56:32,960 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:56:32,960 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:56:32,960 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:56:32,961 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:56:32,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:56:32,961 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:56:32,961 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:56:32,961 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:56:32,961 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:56:32,961 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 -> 9a8e2b8a66923dd7d46d9db92fbd8b38c75eb8108da5237ec87b15cd1ae67985 [2025-03-16 18:56:33,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:56:33,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:56:33,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:56:33,188 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:56:33,188 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:56:33,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c [2025-03-16 18:56:34,298 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f818b50ef/bab7c04675f042e08624e2d73fe3f897/FLAG5a3d55ac9 [2025-03-16 18:56:34,538 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:56:34,539 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c [2025-03-16 18:56:34,546 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f818b50ef/bab7c04675f042e08624e2d73fe3f897/FLAG5a3d55ac9 [2025-03-16 18:56:34,561 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f818b50ef/bab7c04675f042e08624e2d73fe3f897 [2025-03-16 18:56:34,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:56:34,565 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:56:34,566 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:56:34,567 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:56:34,569 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:56:34,570 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,570 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b7b8d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34, skipping insertion in model container [2025-03-16 18:56:34,571 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,581 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:56:34,682 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c[1963,1976] [2025-03-16 18:56:34,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:56:34,691 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:56:34,705 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c[1963,1976] [2025-03-16 18:56:34,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:56:34,717 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:56:34,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34 WrapperNode [2025-03-16 18:56:34,718 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:56:34,719 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:56:34,720 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:56:34,720 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:56:34,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,730 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,741 INFO L138 Inliner]: procedures = 14, calls = 40, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2025-03-16 18:56:34,741 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:56:34,742 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:56:34,742 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:56:34,742 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:56:34,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,750 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,761 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 6, 6, 6]. 30 percent of accesses are in the largest equivalence class. The 5 initializations are split as follows [2, 1, 1, 1]. The 6 writes are split as follows [0, 2, 2, 2]. [2025-03-16 18:56:34,763 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,763 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,767 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,771 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,771 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,775 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,776 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:56:34,776 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:56:34,776 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:56:34,776 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:56:34,777 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (1/1) ... [2025-03-16 18:56:34,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:56:34,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:34,802 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) [2025-03-16 18:56:34,804 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 [2025-03-16 18:56:34,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:56:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:56:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 18:56:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 18:56:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-16 18:56:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 18:56:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 18:56:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 18:56:34,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 18:56:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-16 18:56:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_23_to_23_0 [2025-03-16 18:56:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_23_to_23_0 [2025-03-16 18:56:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_22_to_23_0 [2025-03-16 18:56:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_22_to_23_0 [2025-03-16 18:56:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:56:34,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:56:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 18:56:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 18:56:34,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 18:56:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-16 18:56:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_21_to_22_0 [2025-03-16 18:56:34,825 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_21_to_22_0 [2025-03-16 18:56:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 18:56:34,890 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:56:34,892 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:56:35,017 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L81: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset;call ULTIMATE.dealloc(main_~#b~0#1.base, main_~#b~0#1.offset);havoc main_~#b~0#1.base, main_~#b~0#1.offset;call ULTIMATE.dealloc(main_~#c~0#1.base, main_~#c~0#1.offset);havoc main_~#c~0#1.base, main_~#c~0#1.offset; [2025-03-16 18:56:35,038 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-16 18:56:35,040 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:56:35,048 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:56:35,048 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:56:35,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:56:35 BoogieIcfgContainer [2025-03-16 18:56:35,049 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:56:35,051 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:56:35,051 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:56:35,054 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:56:35,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:56:34" (1/3) ... [2025-03-16 18:56:35,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c84f2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:56:35, skipping insertion in model container [2025-03-16 18:56:35,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:56:34" (2/3) ... [2025-03-16 18:56:35,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c84f2b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:56:35, skipping insertion in model container [2025-03-16 18:56:35,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:56:35" (3/3) ... [2025-03-16 18:56:35,057 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_nested_3.c [2025-03-16 18:56:35,068 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:56:35,070 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_nested_3.c that has 4 procedures, 32 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-16 18:56:35,108 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:56:35,119 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;@4b896585, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:56:35,119 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:56:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 25 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:56:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 18:56:35,127 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:35,128 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:35,128 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:35,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:35,132 INFO L85 PathProgramCache]: Analyzing trace with hash -54212494, now seen corresponding path program 1 times [2025-03-16 18:56:35,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:35,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460687262] [2025-03-16 18:56:35,138 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:35,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:35,190 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 18:56:35,215 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 18:56:35,215 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:35,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:56:35,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:35,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460687262] [2025-03-16 18:56:35,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460687262] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:35,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:35,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:56:35,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944242570] [2025-03-16 18:56:35,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:35,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:56:35,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:35,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:56:35,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:56:35,543 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 25 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 18:56:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:35,693 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2025-03-16 18:56:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:56:35,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2025-03-16 18:56:35,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:35,699 INFO L225 Difference]: With dead ends: 45 [2025-03-16 18:56:35,699 INFO L226 Difference]: Without dead ends: 30 [2025-03-16 18:56:35,701 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:56:35,703 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:35,704 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:56:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-16 18:56:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-03-16 18:56:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 22 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2025-03-16 18:56:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2025-03-16 18:56:35,730 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2025-03-16 18:56:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:35,730 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2025-03-16 18:56:35,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 18:56:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2025-03-16 18:56:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 18:56:35,732 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:35,732 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:35,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 18:56:35,733 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:35,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:35,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1868341507, now seen corresponding path program 1 times [2025-03-16 18:56:35,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:35,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671949938] [2025-03-16 18:56:35,734 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:35,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:35,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 18:56:35,754 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 18:56:35,754 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:35,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 18:56:35,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:35,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671949938] [2025-03-16 18:56:35,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671949938] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:35,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:35,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 18:56:35,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692885258] [2025-03-16 18:56:35,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:35,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:56:35,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:35,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:56:35,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:56:35,930 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 18:56:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:36,005 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2025-03-16 18:56:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:56:36,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2025-03-16 18:56:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:36,006 INFO L225 Difference]: With dead ends: 60 [2025-03-16 18:56:36,006 INFO L226 Difference]: Without dead ends: 32 [2025-03-16 18:56:36,006 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:56:36,007 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:36,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 66 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:56:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-16 18:56:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-03-16 18:56:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.25) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2025-03-16 18:56:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2025-03-16 18:56:36,011 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 23 [2025-03-16 18:56:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:36,011 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2025-03-16 18:56:36,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-16 18:56:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2025-03-16 18:56:36,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 18:56:36,012 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:36,012 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] [2025-03-16 18:56:36,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 18:56:36,012 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:36,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:36,012 INFO L85 PathProgramCache]: Analyzing trace with hash -381462265, now seen corresponding path program 1 times [2025-03-16 18:56:36,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:36,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454105858] [2025-03-16 18:56:36,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:36,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:36,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 18:56:36,034 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 18:56:36,034 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:36,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:56:36,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:36,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454105858] [2025-03-16 18:56:36,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454105858] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:36,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:36,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 18:56:36,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658239104] [2025-03-16 18:56:36,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:36,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:56:36,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:36,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:56:36,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:56:36,186 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 18:56:36,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:36,254 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2025-03-16 18:56:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:56:36,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2025-03-16 18:56:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:36,255 INFO L225 Difference]: With dead ends: 64 [2025-03-16 18:56:36,256 INFO L226 Difference]: Without dead ends: 34 [2025-03-16 18:56:36,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:56:36,257 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:36,257 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 92 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:56:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-16 18:56:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-03-16 18:56:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2025-03-16 18:56:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2025-03-16 18:56:36,265 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 34 [2025-03-16 18:56:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:36,266 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2025-03-16 18:56:36,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 18:56:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2025-03-16 18:56:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-16 18:56:36,267 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:36,267 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-16 18:56:36,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 18:56:36,268 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:36,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1569915814, now seen corresponding path program 1 times [2025-03-16 18:56:36,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:36,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846286527] [2025-03-16 18:56:36,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:36,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-16 18:56:36,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 18:56:36,287 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:36,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 18:56:36,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:36,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846286527] [2025-03-16 18:56:36,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846286527] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:36,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538254696] [2025-03-16 18:56:36,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:36,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:36,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:36,587 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) [2025-03-16 18:56:36,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 18:56:36,639 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-16 18:56:36,666 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 18:56:36,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:36,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:36,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-16 18:56:36,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:36,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:36,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2025-03-16 18:56:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 18:56:36,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:56:37,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-03-16 18:56:37,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538254696] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:37,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:56:37,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2025-03-16 18:56:37,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113320211] [2025-03-16 18:56:37,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:56:37,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 18:56:37,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:37,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 18:56:37,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-03-16 18:56:37,199 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 16 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2025-03-16 18:56:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:37,459 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2025-03-16 18:56:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-16 18:56:37,459 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 39 [2025-03-16 18:56:37,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:37,461 INFO L225 Difference]: With dead ends: 73 [2025-03-16 18:56:37,462 INFO L226 Difference]: Without dead ends: 41 [2025-03-16 18:56:37,462 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2025-03-16 18:56:37,463 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:37,464 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 93 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:56:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-16 18:56:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2025-03-16 18:56:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2025-03-16 18:56:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2025-03-16 18:56:37,472 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 39 [2025-03-16 18:56:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:37,473 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2025-03-16 18:56:37,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 14 states have internal predecessors, (41), 7 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2025-03-16 18:56:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2025-03-16 18:56:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 18:56:37,475 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:37,475 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:37,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 18:56:37,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:37,676 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:37,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:37,676 INFO L85 PathProgramCache]: Analyzing trace with hash 930229706, now seen corresponding path program 1 times [2025-03-16 18:56:37,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:37,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795172888] [2025-03-16 18:56:37,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:37,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:37,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-16 18:56:37,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 18:56:37,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:37,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 18:56:37,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:37,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795172888] [2025-03-16 18:56:37,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795172888] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:56:37,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:56:37,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 18:56:37,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023147102] [2025-03-16 18:56:37,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:56:37,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 18:56:37,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:37,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 18:56:37,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:56:37,721 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 18:56:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:37,736 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2025-03-16 18:56:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 18:56:37,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2025-03-16 18:56:37,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:37,737 INFO L225 Difference]: With dead ends: 46 [2025-03-16 18:56:37,738 INFO L226 Difference]: Without dead ends: 43 [2025-03-16 18:56:37,738 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:56:37,738 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:37,738 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 90 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:56:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-03-16 18:56:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2025-03-16 18:56:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2025-03-16 18:56:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2025-03-16 18:56:37,743 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 44 [2025-03-16 18:56:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:37,744 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2025-03-16 18:56:37,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-16 18:56:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2025-03-16 18:56:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-16 18:56:37,750 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:37,750 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:37,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-16 18:56:37,750 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:37,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:37,751 INFO L85 PathProgramCache]: Analyzing trace with hash 930230667, now seen corresponding path program 1 times [2025-03-16 18:56:37,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:37,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229783598] [2025-03-16 18:56:37,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:37,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:37,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-16 18:56:37,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 18:56:37,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:37,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 18:56:38,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:38,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229783598] [2025-03-16 18:56:38,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229783598] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:38,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103625824] [2025-03-16 18:56:38,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:56:38,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:38,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:38,125 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) [2025-03-16 18:56:38,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 18:56:38,169 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-16 18:56:38,191 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-16 18:56:38,191 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:56:38,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:38,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 18:56:38,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:38,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 18:56:38,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:56:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 18:56:38,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103625824] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:56:38,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:56:38,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 27 [2025-03-16 18:56:38,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604896180] [2025-03-16 18:56:38,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:56:38,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-16 18:56:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:38,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-16 18:56:38,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2025-03-16 18:56:38,803 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 27 states, 20 states have (on average 2.5) internal successors, (50), 23 states have internal predecessors, (50), 11 states have call successors, (15), 6 states have call predecessors, (15), 9 states have return successors, (15), 8 states have call predecessors, (15), 11 states have call successors, (15) [2025-03-16 18:56:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:39,124 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2025-03-16 18:56:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 18:56:39,124 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 2.5) internal successors, (50), 23 states have internal predecessors, (50), 11 states have call successors, (15), 6 states have call predecessors, (15), 9 states have return successors, (15), 8 states have call predecessors, (15), 11 states have call successors, (15) Word has length 44 [2025-03-16 18:56:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:39,126 INFO L225 Difference]: With dead ends: 86 [2025-03-16 18:56:39,126 INFO L226 Difference]: Without dead ends: 46 [2025-03-16 18:56:39,127 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 18:56:39,127 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:39,128 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 200 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:56:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-16 18:56:39,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-03-16 18:56:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (14), 11 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-16 18:56:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2025-03-16 18:56:39,137 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 44 [2025-03-16 18:56:39,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:39,137 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2025-03-16 18:56:39,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 2.5) internal successors, (50), 23 states have internal predecessors, (50), 11 states have call successors, (15), 6 states have call predecessors, (15), 9 states have return successors, (15), 8 states have call predecessors, (15), 11 states have call successors, (15) [2025-03-16 18:56:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2025-03-16 18:56:39,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-16 18:56:39,138 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:39,138 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:39,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 18:56:39,339 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,SelfDestructingSolverStorable5 [2025-03-16 18:56:39,339 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:39,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:39,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1083260925, now seen corresponding path program 2 times [2025-03-16 18:56:39,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:39,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232824843] [2025-03-16 18:56:39,340 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:56:39,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:39,353 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-03-16 18:56:39,364 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 18:56:39,365 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:56:39,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-16 18:56:39,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:39,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232824843] [2025-03-16 18:56:39,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232824843] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:39,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039201153] [2025-03-16 18:56:39,813 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:56:39,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:39,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:39,817 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) [2025-03-16 18:56:39,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 18:56:39,866 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-03-16 18:56:39,900 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 18:56:39,900 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:56:39,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:39,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-16 18:56:39,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:39,912 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 [2025-03-16 18:56:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2025-03-16 18:56:40,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:56:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2025-03-16 18:56:40,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039201153] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:56:40,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:56:40,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 10] total 28 [2025-03-16 18:56:40,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871014783] [2025-03-16 18:56:40,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:56:40,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-16 18:56:40,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:40,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-16 18:56:40,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2025-03-16 18:56:40,465 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 28 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 24 states have internal predecessors, (51), 11 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (17), 9 states have call predecessors, (17), 11 states have call successors, (17) [2025-03-16 18:56:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:40,884 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2025-03-16 18:56:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 18:56:40,887 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 24 states have internal predecessors, (51), 11 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (17), 9 states have call predecessors, (17), 11 states have call successors, (17) Word has length 75 [2025-03-16 18:56:40,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:40,887 INFO L225 Difference]: With dead ends: 90 [2025-03-16 18:56:40,887 INFO L226 Difference]: Without dead ends: 46 [2025-03-16 18:56:40,888 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 18:56:40,889 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:40,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 194 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:56:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-16 18:56:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-03-16 18:56:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 11 states have return successors, (14), 11 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-16 18:56:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2025-03-16 18:56:40,898 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 75 [2025-03-16 18:56:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:40,898 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2025-03-16 18:56:40,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 24 states have internal predecessors, (51), 11 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (17), 9 states have call predecessors, (17), 11 states have call successors, (17) [2025-03-16 18:56:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2025-03-16 18:56:40,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2025-03-16 18:56:40,900 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:40,900 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 16, 16, 16, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:40,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 18:56:41,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:41,101 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:41,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash -805569242, now seen corresponding path program 2 times [2025-03-16 18:56:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:41,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516712998] [2025-03-16 18:56:41,101 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:56:41,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:41,115 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 158 statements into 2 equivalence classes. [2025-03-16 18:56:41,135 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 158 of 158 statements. [2025-03-16 18:56:41,135 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:56:41,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 14 proven. 389 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2025-03-16 18:56:42,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:42,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516712998] [2025-03-16 18:56:42,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516712998] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:42,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968708551] [2025-03-16 18:56:42,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:56:42,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:42,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:42,010 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) [2025-03-16 18:56:42,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 18:56:42,078 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 158 statements into 2 equivalence classes. [2025-03-16 18:56:42,143 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 158 of 158 statements. [2025-03-16 18:56:42,143 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:56:42,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:42,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-16 18:56:42,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:42,164 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 [2025-03-16 18:56:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 965 trivial. 0 not checked. [2025-03-16 18:56:42,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:56:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2025-03-16 18:56:43,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968708551] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:56:43,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:56:43,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14] total 34 [2025-03-16 18:56:43,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297257866] [2025-03-16 18:56:43,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:56:43,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-16 18:56:43,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:43,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-16 18:56:43,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2025-03-16 18:56:43,199 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 34 states, 26 states have (on average 2.230769230769231) internal successors, (58), 29 states have internal predecessors, (58), 13 states have call successors, (19), 6 states have call predecessors, (19), 13 states have return successors, (23), 13 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-16 18:56:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:43,544 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2025-03-16 18:56:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-16 18:56:43,546 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 26 states have (on average 2.230769230769231) internal successors, (58), 29 states have internal predecessors, (58), 13 states have call successors, (19), 6 states have call predecessors, (19), 13 states have return successors, (23), 13 states have call predecessors, (23), 13 states have call successors, (23) Word has length 158 [2025-03-16 18:56:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:43,547 INFO L225 Difference]: With dead ends: 94 [2025-03-16 18:56:43,547 INFO L226 Difference]: Without dead ends: 50 [2025-03-16 18:56:43,548 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1838, Unknown=0, NotChecked=0, Total=2162 [2025-03-16 18:56:43,548 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:43,548 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 137 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:56:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-16 18:56:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-03-16 18:56:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 3 states have call predecessors, (6), 13 states have return successors, (16), 13 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-16 18:56:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2025-03-16 18:56:43,560 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 158 [2025-03-16 18:56:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:43,560 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2025-03-16 18:56:43,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 26 states have (on average 2.230769230769231) internal successors, (58), 29 states have internal predecessors, (58), 13 states have call successors, (19), 6 states have call predecessors, (19), 13 states have return successors, (23), 13 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-16 18:56:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2025-03-16 18:56:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2025-03-16 18:56:43,565 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:43,565 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 30, 30, 30, 9, 9, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:43,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 18:56:43,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:43,766 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:43,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:43,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1005833229, now seen corresponding path program 3 times [2025-03-16 18:56:43,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:43,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424430305] [2025-03-16 18:56:43,766 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:56:43,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:43,799 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 261 statements into 11 equivalence classes. [2025-03-16 18:56:43,808 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 83 of 261 statements. [2025-03-16 18:56:43,809 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 18:56:43,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3177 backedges. 112 proven. 8 refuted. 0 times theorem prover too weak. 3057 trivial. 0 not checked. [2025-03-16 18:56:44,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:44,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424430305] [2025-03-16 18:56:44,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424430305] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:44,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129379276] [2025-03-16 18:56:44,158 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:56:44,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:44,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:44,160 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:56:44,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 18:56:44,249 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 261 statements into 11 equivalence classes. [2025-03-16 18:56:44,292 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 83 of 261 statements. [2025-03-16 18:56:44,292 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 18:56:44,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:44,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-16 18:56:44,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:44,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:56:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3177 backedges. 106 proven. 12 refuted. 0 times theorem prover too weak. 3059 trivial. 0 not checked. [2025-03-16 18:56:44,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:56:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3177 backedges. 108 proven. 15 refuted. 0 times theorem prover too weak. 3054 trivial. 0 not checked. [2025-03-16 18:56:45,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129379276] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:56:45,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:56:45,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 31 [2025-03-16 18:56:45,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242306547] [2025-03-16 18:56:45,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:56:45,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-16 18:56:45,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:45,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-16 18:56:45,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2025-03-16 18:56:45,677 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 31 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 27 states have internal predecessors, (59), 16 states have call successors, (23), 6 states have call predecessors, (23), 9 states have return successors, (24), 12 states have call predecessors, (24), 16 states have call successors, (24) [2025-03-16 18:56:45,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:45,949 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2025-03-16 18:56:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 18:56:45,950 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 27 states have internal predecessors, (59), 16 states have call successors, (23), 6 states have call predecessors, (23), 9 states have return successors, (24), 12 states have call predecessors, (24), 16 states have call successors, (24) Word has length 261 [2025-03-16 18:56:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:45,952 INFO L225 Difference]: With dead ends: 102 [2025-03-16 18:56:45,954 INFO L226 Difference]: Without dead ends: 54 [2025-03-16 18:56:45,955 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 504 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2025-03-16 18:56:45,955 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:45,955 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 192 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 18:56:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-03-16 18:56:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2025-03-16 18:56:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 15 states have return successors, (18), 15 states have call predecessors, (18), 6 states have call successors, (18) [2025-03-16 18:56:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2025-03-16 18:56:45,962 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 261 [2025-03-16 18:56:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:45,962 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2025-03-16 18:56:45,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 27 states have internal predecessors, (59), 16 states have call successors, (23), 6 states have call predecessors, (23), 9 states have return successors, (24), 12 states have call predecessors, (24), 16 states have call successors, (24) [2025-03-16 18:56:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2025-03-16 18:56:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2025-03-16 18:56:45,970 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:45,970 INFO L218 NwaCegarLoop]: trace histogram [72, 72, 60, 60, 60, 15, 15, 12, 12, 12, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:45,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 18:56:46,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:46,174 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:46,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:46,174 INFO L85 PathProgramCache]: Analyzing trace with hash 477085109, now seen corresponding path program 4 times [2025-03-16 18:56:46,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:46,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658766075] [2025-03-16 18:56:46,174 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:56:46,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:46,202 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 477 statements into 2 equivalence classes. [2025-03-16 18:56:46,233 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 476 of 477 statements. [2025-03-16 18:56:46,233 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 18:56:46,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12645 backedges. 724 proven. 1251 refuted. 0 times theorem prover too weak. 10670 trivial. 0 not checked. [2025-03-16 18:56:48,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:56:48,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658766075] [2025-03-16 18:56:48,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658766075] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:56:48,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478901960] [2025-03-16 18:56:48,227 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 18:56:48,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:48,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:56:48,229 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:56:48,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 18:56:48,365 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 477 statements into 2 equivalence classes. [2025-03-16 18:56:48,501 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 476 of 477 statements. [2025-03-16 18:56:48,502 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 18:56:48,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:56:48,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 80 conjuncts are in the unsatisfiable core [2025-03-16 18:56:48,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:56:48,534 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 [2025-03-16 18:56:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12645 backedges. 1906 proven. 35 refuted. 0 times theorem prover too weak. 10704 trivial. 0 not checked. [2025-03-16 18:56:48,758 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:56:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12645 backedges. 14 proven. 1986 refuted. 0 times theorem prover too weak. 10645 trivial. 0 not checked. [2025-03-16 18:56:51,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478901960] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:56:51,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:56:51,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 26] total 42 [2025-03-16 18:56:51,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349226460] [2025-03-16 18:56:51,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:56:51,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-16 18:56:51,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:56:51,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-16 18:56:51,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1375, Unknown=0, NotChecked=0, Total=1722 [2025-03-16 18:56:51,971 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 42 states, 32 states have (on average 2.21875) internal successors, (71), 35 states have internal predecessors, (71), 12 states have call successors, (24), 9 states have call predecessors, (24), 15 states have return successors, (33), 13 states have call predecessors, (33), 12 states have call successors, (33) [2025-03-16 18:56:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:56:52,225 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2025-03-16 18:56:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 18:56:52,225 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 32 states have (on average 2.21875) internal successors, (71), 35 states have internal predecessors, (71), 12 states have call successors, (24), 9 states have call predecessors, (24), 15 states have return successors, (33), 13 states have call predecessors, (33), 12 states have call successors, (33) Word has length 477 [2025-03-16 18:56:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:56:52,226 INFO L225 Difference]: With dead ends: 108 [2025-03-16 18:56:52,226 INFO L226 Difference]: Without dead ends: 56 [2025-03-16 18:56:52,227 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 933 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=534, Invalid=1916, Unknown=0, NotChecked=0, Total=2450 [2025-03-16 18:56:52,227 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:56:52,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 294 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:56:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-03-16 18:56:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2025-03-16 18:56:52,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 36 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 16 states have return successors, (19), 16 states have call predecessors, (19), 6 states have call successors, (19) [2025-03-16 18:56:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2025-03-16 18:56:52,238 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 477 [2025-03-16 18:56:52,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:56:52,238 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2025-03-16 18:56:52,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 32 states have (on average 2.21875) internal successors, (71), 35 states have internal predecessors, (71), 12 states have call successors, (24), 9 states have call predecessors, (24), 15 states have return successors, (33), 13 states have call predecessors, (33), 12 states have call successors, (33) [2025-03-16 18:56:52,238 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2025-03-16 18:56:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2025-03-16 18:56:52,245 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:56:52,245 INFO L218 NwaCegarLoop]: trace histogram [84, 84, 72, 72, 72, 15, 15, 12, 12, 12, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:56:52,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 18:56:52,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:56:52,449 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:56:52,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:56:52,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1577394015, now seen corresponding path program 5 times [2025-03-16 18:56:52,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:56:52,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678059] [2025-03-16 18:56:52,450 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:56:52,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:56:52,489 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 537 statements into 23 equivalence classes. [2025-03-16 18:56:52,839 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) and asserted 514 of 537 statements. [2025-03-16 18:56:52,839 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2025-03-16 18:56:52,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:57:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17151 backedges. 192 proven. 4640 refuted. 0 times theorem prover too weak. 12319 trivial. 0 not checked. [2025-03-16 18:57:00,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:57:00,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678059] [2025-03-16 18:57:00,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678059] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:57:00,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890898209] [2025-03-16 18:57:00,697 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 18:57:00,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:57:00,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:57:00,699 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:57:00,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 18:57:00,864 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 537 statements into 23 equivalence classes. [2025-03-16 18:57:21,423 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) and asserted 514 of 537 statements. [2025-03-16 18:57:21,424 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2025-03-16 18:57:21,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:57:21,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 98 conjuncts are in the unsatisfiable core [2025-03-16 18:57:21,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:57:21,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 18:57:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17151 backedges. 7728 proven. 24 refuted. 0 times theorem prover too weak. 9399 trivial. 0 not checked. [2025-03-16 18:57:21,707 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:57:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17151 backedges. 6 proven. 360 refuted. 0 times theorem prover too weak. 16785 trivial. 0 not checked. [2025-03-16 18:57:24,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890898209] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:57:24,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:57:24,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12, 22] total 64 [2025-03-16 18:57:24,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242869882] [2025-03-16 18:57:24,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:57:24,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2025-03-16 18:57:24,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:57:24,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2025-03-16 18:57:24,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=3549, Unknown=0, NotChecked=0, Total=4032 [2025-03-16 18:57:24,497 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 64 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 56 states have internal predecessors, (100), 26 states have call successors, (38), 10 states have call predecessors, (38), 23 states have return successors, (46), 26 states have call predecessors, (46), 26 states have call successors, (46) [2025-03-16 18:57:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:57:25,242 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2025-03-16 18:57:25,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-16 18:57:25,243 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 56 states have internal predecessors, (100), 26 states have call successors, (38), 10 states have call predecessors, (38), 23 states have return successors, (46), 26 states have call predecessors, (46), 26 states have call successors, (46) Word has length 537 [2025-03-16 18:57:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:57:25,246 INFO L225 Difference]: With dead ends: 114 [2025-03-16 18:57:25,246 INFO L226 Difference]: Without dead ends: 60 [2025-03-16 18:57:25,248 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1171 GetRequests, 1092 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1910 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=778, Invalid=5702, Unknown=0, NotChecked=0, Total=6480 [2025-03-16 18:57:25,249 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 82 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:57:25,249 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 432 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 18:57:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-16 18:57:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2025-03-16 18:57:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 38 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 18 states have return successors, (21), 18 states have call predecessors, (21), 6 states have call successors, (21) [2025-03-16 18:57:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2025-03-16 18:57:25,259 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 537 [2025-03-16 18:57:25,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:57:25,259 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2025-03-16 18:57:25,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 56 states have internal predecessors, (100), 26 states have call successors, (38), 10 states have call predecessors, (38), 23 states have return successors, (46), 26 states have call predecessors, (46), 26 states have call successors, (46) [2025-03-16 18:57:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2025-03-16 18:57:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2025-03-16 18:57:25,264 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:57:25,264 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 108, 108, 108, 21, 21, 18, 18, 18, 18, 18, 18, 18, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:57:25,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 18:57:25,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:57:25,465 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:57:25,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:57:25,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1610934439, now seen corresponding path program 6 times [2025-03-16 18:57:25,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:57:25,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364595068] [2025-03-16 18:57:25,465 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 18:57:25,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:57:25,508 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 783 statements into 46 equivalence classes. [2025-03-16 18:57:25,523 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 101 of 783 statements. [2025-03-16 18:57:25,523 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 18:57:25,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:57:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 38610 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 38583 trivial. 0 not checked. [2025-03-16 18:57:26,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:57:26,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364595068] [2025-03-16 18:57:26,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364595068] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:57:26,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25650661] [2025-03-16 18:57:26,072 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 18:57:26,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:57:26,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:57:26,075 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:57:26,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 18:57:26,311 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 783 statements into 46 equivalence classes. [2025-03-16 18:57:26,403 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 101 of 783 statements. [2025-03-16 18:57:26,403 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-16 18:57:26,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:57:26,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-03-16 18:57:26,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:57:26,428 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 [2025-03-16 18:57:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 38610 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 38595 trivial. 0 not checked. [2025-03-16 18:57:26,642 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:57:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 38610 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 38577 trivial. 0 not checked. [2025-03-16 18:57:29,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25650661] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:57:29,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:57:29,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 18] total 40 [2025-03-16 18:57:29,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956255389] [2025-03-16 18:57:29,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:57:29,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-16 18:57:29,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:57:29,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-16 18:57:29,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 18:57:29,472 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 40 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 35 states have internal predecessors, (56), 18 states have call successors, (20), 6 states have call predecessors, (20), 12 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2025-03-16 18:57:29,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:57:29,740 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2025-03-16 18:57:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 18:57:29,740 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 35 states have internal predecessors, (56), 18 states have call successors, (20), 6 states have call predecessors, (20), 12 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) Word has length 783 [2025-03-16 18:57:29,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:57:29,742 INFO L225 Difference]: With dead ends: 73 [2025-03-16 18:57:29,742 INFO L226 Difference]: Without dead ends: 64 [2025-03-16 18:57:29,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1592 GetRequests, 1545 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2025-03-16 18:57:29,743 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:57:29,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 180 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:57:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-16 18:57:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2025-03-16 18:57:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.135135135135135) internal successors, (42), 40 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 20 states have return successors, (23), 20 states have call predecessors, (23), 6 states have call successors, (23) [2025-03-16 18:57:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2025-03-16 18:57:29,748 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 783 [2025-03-16 18:57:29,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:57:29,749 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2025-03-16 18:57:29,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 35 states have internal predecessors, (56), 18 states have call successors, (20), 6 states have call predecessors, (20), 12 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2025-03-16 18:57:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2025-03-16 18:57:29,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1298 [2025-03-16 18:57:29,756 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:57:29,756 INFO L218 NwaCegarLoop]: trace histogram [210, 210, 180, 180, 180, 35, 35, 30, 30, 30, 30, 30, 30, 30, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:57:29,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 18:57:29,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-16 18:57:29,957 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:57:29,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:57:29,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1816266701, now seen corresponding path program 7 times [2025-03-16 18:57:29,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:57:29,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077857217] [2025-03-16 18:57:29,957 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 18:57:29,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:57:30,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1297 statements into 1 equivalence classes. [2025-03-16 18:57:30,154 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1297 of 1297 statements. [2025-03-16 18:57:30,154 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:57:30,154 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:57:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 107665 backedges. 15 proven. 39 refuted. 0 times theorem prover too weak. 107611 trivial. 0 not checked. [2025-03-16 18:57:39,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:57:39,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077857217] [2025-03-16 18:57:39,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077857217] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:57:39,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72661452] [2025-03-16 18:57:39,642 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 18:57:39,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:57:39,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:57:39,644 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:57:39,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 18:57:40,013 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1297 statements into 1 equivalence classes. [2025-03-16 18:57:40,417 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1297 of 1297 statements. [2025-03-16 18:57:40,417 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:57:40,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:57:40,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 5312 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-03-16 18:57:40,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:57:40,462 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 [2025-03-16 18:57:40,702 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 [2025-03-16 18:57:40,722 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 [2025-03-16 18:57:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 107665 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 107626 trivial. 0 not checked. [2025-03-16 18:57:40,726 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:57:41,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72661452] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:57:41,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:57:41,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 26 [2025-03-16 18:57:41,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899181189] [2025-03-16 18:57:41,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:57:41,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-16 18:57:41,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:57:41,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-16 18:57:41,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2025-03-16 18:57:41,916 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 26 states, 20 states have (on average 2.1) internal successors, (42), 24 states have internal predecessors, (42), 10 states have call successors, (12), 2 states have call predecessors, (12), 12 states have return successors, (17), 15 states have call predecessors, (17), 10 states have call successors, (17) [2025-03-16 18:57:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:57:42,033 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2025-03-16 18:57:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 18:57:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 2.1) internal successors, (42), 24 states have internal predecessors, (42), 10 states have call successors, (12), 2 states have call predecessors, (12), 12 states have return successors, (17), 15 states have call predecessors, (17), 10 states have call successors, (17) Word has length 1297 [2025-03-16 18:57:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:57:42,035 INFO L225 Difference]: With dead ends: 73 [2025-03-16 18:57:42,035 INFO L226 Difference]: Without dead ends: 68 [2025-03-16 18:57:42,036 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1337 GetRequests, 1309 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2025-03-16 18:57:42,036 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:57:42,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 69 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:57:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-16 18:57:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-03-16 18:57:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 3 states have call predecessors, (6), 21 states have return successors, (25), 22 states have call predecessors, (25), 6 states have call successors, (25) [2025-03-16 18:57:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2025-03-16 18:57:42,042 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 1297 [2025-03-16 18:57:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:57:42,044 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2025-03-16 18:57:42,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 2.1) internal successors, (42), 24 states have internal predecessors, (42), 10 states have call successors, (12), 2 states have call predecessors, (12), 12 states have return successors, (17), 15 states have call predecessors, (17), 10 states have call successors, (17) [2025-03-16 18:57:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2025-03-16 18:57:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1298 [2025-03-16 18:57:42,051 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:57:42,052 INFO L218 NwaCegarLoop]: trace histogram [210, 210, 180, 180, 180, 35, 35, 30, 30, 30, 30, 30, 30, 30, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:57:42,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 18:57:42,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 18:57:42,252 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:57:42,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:57:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1817191183, now seen corresponding path program 3 times [2025-03-16 18:57:42,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:57:42,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373674320] [2025-03-16 18:57:42,253 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:57:42,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:57:42,316 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1297 statements into 88 equivalence classes. [2025-03-16 18:57:43,013 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 67 check-sat command(s) and asserted 1119 of 1297 statements. [2025-03-16 18:57:43,014 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 67 check-sat command(s) [2025-03-16 18:57:43,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:57:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 107665 backedges. 31 proven. 5 refuted. 0 times theorem prover too weak. 107629 trivial. 0 not checked. [2025-03-16 18:57:46,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:57:46,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373674320] [2025-03-16 18:57:46,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373674320] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:57:46,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794813503] [2025-03-16 18:57:46,797 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 18:57:46,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:57:46,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:57:46,799 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:57:46,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 18:57:47,142 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1297 statements into 88 equivalence classes.