./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 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/array-examples/standard_copy6_ground-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9e07c08b08b04587ccec5205fe357151301abec81845a5f3a121e5979e6bfacf --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:00:49,701 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:00:49,754 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:00:49,760 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:00:49,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:00:49,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:00:49,782 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:00:49,782 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:00:49,783 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:00:49,783 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:00:49,784 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:00:49,784 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:00:49,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:00:49,784 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:00:49,785 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:00:49,785 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:00:49,785 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:00:49,785 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:00:49,785 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:00:49,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:00:49,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:00:49,786 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:00:49,786 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:00:49,786 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:00:49,786 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:00:49,786 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:00:49,786 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:00:49,786 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:00:49,786 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:00:49,786 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:00:49,787 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:00:49,787 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:00:49,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:00:49,787 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:00:49,787 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:00:49,787 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:00:49,787 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:00:49,787 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:00:49,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:00:49,787 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:00:49,787 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:00:49,787 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:00:49,788 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:00:49,788 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 -> 9e07c08b08b04587ccec5205fe357151301abec81845a5f3a121e5979e6bfacf [2025-03-03 09:00:49,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:00:50,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:00:50,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:00:50,004 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:00:50,004 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:00:50,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2025-03-03 09:00:51,109 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5522bf94/5c8fa37ece6a466cb2998b32f53dc3cc/FLAG613366cc9 [2025-03-03 09:00:51,321 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:00:51,322 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2025-03-03 09:00:51,326 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5522bf94/5c8fa37ece6a466cb2998b32f53dc3cc/FLAG613366cc9 [2025-03-03 09:00:51,672 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5522bf94/5c8fa37ece6a466cb2998b32f53dc3cc [2025-03-03 09:00:51,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:00:51,674 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:00:51,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:00:51,675 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:00:51,678 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:00:51,678 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,679 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c78d413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51, skipping insertion in model container [2025-03-03 09:00:51,679 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,687 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:00:51,787 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/array-examples/standard_copy6_ground-1.i[816,829] [2025-03-03 09:00:51,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:00:51,813 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:00:51,821 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/array-examples/standard_copy6_ground-1.i[816,829] [2025-03-03 09:00:51,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:00:51,849 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:00:51,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51 WrapperNode [2025-03-03 09:00:51,850 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:00:51,851 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:00:51,852 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:00:51,852 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:00:51,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,864 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,877 INFO L138 Inliner]: procedures = 16, calls = 44, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2025-03-03 09:00:51,877 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:00:51,878 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:00:51,878 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:00:51,878 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:00:51,883 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,886 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,899 INFO L175 MemorySlicer]: Split 18 memory accesses to 8 slices as follows [2, 2, 2, 3, 2, 2, 2, 3]. 17 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0]. The 8 writes are split as follows [0, 1, 1, 1, 1, 1, 1, 2]. [2025-03-03 09:00:51,900 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,901 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,909 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,909 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,914 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,915 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:00:51,916 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:00:51,916 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:00:51,916 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:00:51,921 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (1/1) ... [2025-03-03 09:00:51,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:00:51,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:00:51,950 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) [2025-03-03 09:00:51,953 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 [2025-03-03 09:00:51,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:00:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:00:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 09:00:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-03 09:00:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-03 09:00:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-03-03 09:00:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-03-03 09:00:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-03-03 09:00:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2025-03-03 09:00:51,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 09:00:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 09:00:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 09:00:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-03 09:00:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-03 09:00:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-03-03 09:00:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-03-03 09:00:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2025-03-03 09:00:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2025-03-03 09:00:51,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:00:51,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:00:51,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 09:00:51,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 09:00:51,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-03 09:00:51,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-03 09:00:51,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-03-03 09:00:51,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-03-03 09:00:51,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-03-03 09:00:51,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2025-03-03 09:00:51,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 09:00:52,052 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:00:52,055 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:00:52,209 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L16: call ULTIMATE.dealloc(main_~#a1~0#1.base, main_~#a1~0#1.offset);havoc main_~#a1~0#1.base, main_~#a1~0#1.offset;call ULTIMATE.dealloc(main_~#a2~0#1.base, main_~#a2~0#1.offset);havoc main_~#a2~0#1.base, main_~#a2~0#1.offset;call ULTIMATE.dealloc(main_~#a3~0#1.base, main_~#a3~0#1.offset);havoc main_~#a3~0#1.base, main_~#a3~0#1.offset;call ULTIMATE.dealloc(main_~#a4~0#1.base, main_~#a4~0#1.offset);havoc main_~#a4~0#1.base, main_~#a4~0#1.offset;call ULTIMATE.dealloc(main_~#a5~0#1.base, main_~#a5~0#1.offset);havoc main_~#a5~0#1.base, main_~#a5~0#1.offset;call ULTIMATE.dealloc(main_~#a6~0#1.base, main_~#a6~0#1.offset);havoc main_~#a6~0#1.base, main_~#a6~0#1.offset;call ULTIMATE.dealloc(main_~#a7~0#1.base, main_~#a7~0#1.offset);havoc main_~#a7~0#1.base, main_~#a7~0#1.offset; [2025-03-03 09:00:52,216 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-03 09:00:52,217 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:00:52,224 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:00:52,225 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:00:52,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:00:52 BoogieIcfgContainer [2025-03-03 09:00:52,226 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:00:52,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:00:52,228 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:00:52,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:00:52,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:00:51" (1/3) ... [2025-03-03 09:00:52,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d03aa7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:00:52, skipping insertion in model container [2025-03-03 09:00:52,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:00:51" (2/3) ... [2025-03-03 09:00:52,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d03aa7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:00:52, skipping insertion in model container [2025-03-03 09:00:52,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:00:52" (3/3) ... [2025-03-03 09:00:52,234 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2025-03-03 09:00:52,245 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:00:52,246 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_copy6_ground-1.i that has 1 procedures, 17 locations, 1 initial locations, 8 loop locations, and 1 error locations. [2025-03-03 09:00:52,288 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:00:52,297 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;@48f862a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:00:52,297 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:00:52,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-03 09:00:52,304 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:00:52,305 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:00:52,305 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:00:52,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:00:52,310 INFO L85 PathProgramCache]: Analyzing trace with hash -322973576, now seen corresponding path program 1 times [2025-03-03 09:00:52,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:00:52,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794275443] [2025-03-03 09:00:52,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:00:52,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:00:52,373 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-03 09:00:52,389 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-03 09:00:52,389 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:00:52,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:00:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:00:52,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:00:52,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794275443] [2025-03-03 09:00:52,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794275443] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:00:52,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:00:52,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 09:00:52,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979388457] [2025-03-03 09:00:52,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:00:52,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:00:52,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:00:52,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:00:52,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:00:52,522 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:52,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:00:52,535 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2025-03-03 09:00:52,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:00:52,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-03 09:00:52,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:00:52,542 INFO L225 Difference]: With dead ends: 32 [2025-03-03 09:00:52,542 INFO L226 Difference]: Without dead ends: 15 [2025-03-03 09:00:52,545 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:00:52,547 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:00:52,547 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:00:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-03-03 09:00:52,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-03-03 09:00:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2025-03-03 09:00:52,571 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 12 [2025-03-03 09:00:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:00:52,572 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 22 transitions. [2025-03-03 09:00:52,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 22 transitions. [2025-03-03 09:00:52,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-03 09:00:52,572 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:00:52,572 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:00:52,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 09:00:52,572 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:00:52,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:00:52,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1907368433, now seen corresponding path program 1 times [2025-03-03 09:00:52,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:00:52,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582531241] [2025-03-03 09:00:52,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:00:52,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:00:52,597 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 09:00:52,607 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 09:00:52,608 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:00:52,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:00:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:00:52,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:00:52,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582531241] [2025-03-03 09:00:52,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582531241] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:00:52,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409148701] [2025-03-03 09:00:52,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:00:52,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:00:52,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:00:52,685 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) [2025-03-03 09:00:52,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 09:00:52,747 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-03 09:00:52,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-03 09:00:52,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:00:52,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:00:52,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-03 09:00:52,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:00:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 09:00:52,794 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:00:52,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409148701] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:00:52,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:00:52,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-03 09:00:52,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920244159] [2025-03-03 09:00:52,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:00:52,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:00:52,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:00:52,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:00:52,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:00:52,796 INFO L87 Difference]: Start difference. First operand 15 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:00:52,832 INFO L93 Difference]: Finished difference Result 31 states and 49 transitions. [2025-03-03 09:00:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:00:52,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-03 09:00:52,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:00:52,833 INFO L225 Difference]: With dead ends: 31 [2025-03-03 09:00:52,833 INFO L226 Difference]: Without dead ends: 21 [2025-03-03 09:00:52,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:00:52,833 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:00:52,834 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:00:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-03 09:00:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-03-03 09:00:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:52,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2025-03-03 09:00:52,838 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 13 [2025-03-03 09:00:52,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:00:52,839 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2025-03-03 09:00:52,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2025-03-03 09:00:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-03 09:00:52,840 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:00:52,840 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:00:52,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 09:00:53,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:00:53,044 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:00:53,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:00:53,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1708266225, now seen corresponding path program 1 times [2025-03-03 09:00:53,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:00:53,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787562475] [2025-03-03 09:00:53,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:00:53,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:00:53,058 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-03 09:00:53,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 09:00:53,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:00:53,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:00:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:00:53,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:00:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787562475] [2025-03-03 09:00:53,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787562475] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:00:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582681477] [2025-03-03 09:00:53,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:00:53,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:00:53,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:00:53,131 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) [2025-03-03 09:00:53,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 09:00:53,185 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-03 09:00:53,215 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 09:00:53,215 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:00:53,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:00:53,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 09:00:53,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:00:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:00:53,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:00:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:00:53,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582681477] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:00:53,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:00:53,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-03 09:00:53,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970049345] [2025-03-03 09:00:53,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:00:53,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 09:00:53,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:00:53,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 09:00:53,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:00:53,267 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:00:53,282 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2025-03-03 09:00:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:00:53,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-03 09:00:53,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:00:53,284 INFO L225 Difference]: With dead ends: 41 [2025-03-03 09:00:53,284 INFO L226 Difference]: Without dead ends: 24 [2025-03-03 09:00:53,284 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:00:53,285 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:00:53,285 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:00:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-03 09:00:53,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-03-03 09:00:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2025-03-03 09:00:53,287 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 19 [2025-03-03 09:00:53,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:00:53,288 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2025-03-03 09:00:53,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:53,288 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2025-03-03 09:00:53,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-03 09:00:53,288 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:00:53,288 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:00:53,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 09:00:53,488 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,SelfDestructingSolverStorable2 [2025-03-03 09:00:53,489 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:00:53,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:00:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1110996360, now seen corresponding path program 2 times [2025-03-03 09:00:53,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:00:53,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545083606] [2025-03-03 09:00:53,489 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:00:53,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:00:53,503 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-03 09:00:53,527 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 09:00:53,527 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:00:53,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:00:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 09:00:53,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:00:53,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545083606] [2025-03-03 09:00:53,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545083606] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:00:53,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246704552] [2025-03-03 09:00:53,586 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:00:53,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:00:53,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:00:53,588 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) [2025-03-03 09:00:53,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 09:00:53,646 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-03 09:00:53,676 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-03 09:00:53,677 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:00:53,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:00:53,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 09:00:53,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:00:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 09:00:53,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:00:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 09:00:53,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246704552] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:00:53,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:00:53,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-03 09:00:53,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962096667] [2025-03-03 09:00:53,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:00:53,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 09:00:53,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:00:53,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 09:00:53,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:00:53,714 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:00:53,805 INFO L93 Difference]: Finished difference Result 57 states and 87 transitions. [2025-03-03 09:00:53,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:00:53,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-03-03 09:00:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:00:53,808 INFO L225 Difference]: With dead ends: 57 [2025-03-03 09:00:53,808 INFO L226 Difference]: Without dead ends: 42 [2025-03-03 09:00:53,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:00:53,809 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:00:53,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:00:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-03 09:00:53,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2025-03-03 09:00:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2025-03-03 09:00:53,816 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 22 [2025-03-03 09:00:53,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:00:53,816 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2025-03-03 09:00:53,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2025-03-03 09:00:53,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-03 09:00:53,817 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:00:53,817 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:00:53,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 09:00:54,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:00:54,018 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:00:54,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:00:54,019 INFO L85 PathProgramCache]: Analyzing trace with hash -528758600, now seen corresponding path program 3 times [2025-03-03 09:00:54,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:00:54,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228594314] [2025-03-03 09:00:54,019 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:00:54,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:00:54,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 40 statements into 3 equivalence classes. [2025-03-03 09:00:54,070 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 40 of 40 statements. [2025-03-03 09:00:54,070 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:00:54,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:00:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-03 09:00:54,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:00:54,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228594314] [2025-03-03 09:00:54,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228594314] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:00:54,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785486722] [2025-03-03 09:00:54,189 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:00:54,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:00:54,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:00:54,191 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) [2025-03-03 09:00:54,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 09:00:54,264 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 40 statements into 3 equivalence classes. [2025-03-03 09:00:54,339 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 40 of 40 statements. [2025-03-03 09:00:54,339 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 09:00:54,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:00:54,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 09:00:54,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:00:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-03 09:00:54,368 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:00:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-03 09:00:54,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785486722] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:00:54,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:00:54,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-03 09:00:54,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673711946] [2025-03-03 09:00:54,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:00:54,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 09:00:54,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:00:54,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 09:00:54,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-03 09:00:54,442 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:00:54,607 INFO L93 Difference]: Finished difference Result 108 states and 156 transitions. [2025-03-03 09:00:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 09:00:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2025-03-03 09:00:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:00:54,608 INFO L225 Difference]: With dead ends: 108 [2025-03-03 09:00:54,608 INFO L226 Difference]: Without dead ends: 78 [2025-03-03 09:00:54,609 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-03 09:00:54,609 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:00:54,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:00:54,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-03 09:00:54,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-03-03 09:00:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.103896103896104) internal successors, (85), 77 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2025-03-03 09:00:54,619 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 40 [2025-03-03 09:00:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:00:54,619 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2025-03-03 09:00:54,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:54,619 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2025-03-03 09:00:54,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-03-03 09:00:54,620 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:00:54,620 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:00:54,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 09:00:54,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:00:54,821 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:00:54,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:00:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1771038840, now seen corresponding path program 4 times [2025-03-03 09:00:54,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:00:54,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366173767] [2025-03-03 09:00:54,821 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:00:54,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:00:54,856 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 76 statements into 2 equivalence classes. [2025-03-03 09:00:54,881 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-03-03 09:00:54,882 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:00:54,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:00:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2025-03-03 09:00:55,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:00:55,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366173767] [2025-03-03 09:00:55,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366173767] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:00:55,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655786303] [2025-03-03 09:00:55,100 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:00:55,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:00:55,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:00:55,102 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) [2025-03-03 09:00:55,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 09:00:55,197 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 76 statements into 2 equivalence classes. [2025-03-03 09:00:55,253 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-03-03 09:00:55,253 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 09:00:55,253 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:00:55,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 09:00:55,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:00:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2025-03-03 09:00:55,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:00:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2025-03-03 09:00:55,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655786303] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:00:55,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:00:55,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-03 09:00:55,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233134127] [2025-03-03 09:00:55,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:00:55,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 09:00:55,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:00:55,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 09:00:55,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-03 09:00:55,336 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:00:55,353 INFO L93 Difference]: Finished difference Result 155 states and 174 transitions. [2025-03-03 09:00:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 09:00:55,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2025-03-03 09:00:55,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:00:55,357 INFO L225 Difference]: With dead ends: 155 [2025-03-03 09:00:55,358 INFO L226 Difference]: Without dead ends: 84 [2025-03-03 09:00:55,358 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-03 09:00:55,359 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:00:55,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:00:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-03 09:00:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2025-03-03 09:00:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 83 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2025-03-03 09:00:55,375 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 76 [2025-03-03 09:00:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:00:55,376 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2025-03-03 09:00:55,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:00:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2025-03-03 09:00:55,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-03 09:00:55,378 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:00:55,378 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:00:55,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 09:00:55,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:00:55,579 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:00:55,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:00:55,580 INFO L85 PathProgramCache]: Analyzing trace with hash -632661736, now seen corresponding path program 5 times [2025-03-03 09:00:55,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:00:55,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156201688] [2025-03-03 09:00:55,580 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:00:55,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:00:55,613 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 82 statements into 6 equivalence classes. [2025-03-03 09:00:55,753 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 82 of 82 statements. [2025-03-03 09:00:55,753 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-03 09:00:55,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:00:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2025-03-03 09:00:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:00:56,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156201688] [2025-03-03 09:00:56,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156201688] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:00:56,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352521442] [2025-03-03 09:00:56,053 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:00:56,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:00:56,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:00:56,055 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) [2025-03-03 09:00:56,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 09:00:56,171 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 82 statements into 6 equivalence classes.