./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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_copy4_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 46a2982bcd9fbf87ad95f35e8d160ffed7259af3c1cb1d5fe78d4df5a4783123 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 00:10:13,973 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 00:10:14,017 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 00:10:14,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 00:10:14,026 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 00:10:14,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 00:10:14,048 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 00:10:14,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 00:10:14,048 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 00:10:14,049 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 00:10:14,049 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 00:10:14,049 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 00:10:14,049 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 00:10:14,050 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 00:10:14,050 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 00:10:14,050 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 00:10:14,050 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 00:10:14,050 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 00:10:14,050 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 00:10:14,051 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 00:10:14,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:10:14,052 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 00:10:14,052 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 00:10:14,052 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 00:10:14,052 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 00:10:14,052 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 00:10:14,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 00:10:14,052 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 00:10:14,052 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 00:10:14,052 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 00:10:14,052 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 00:10:14,052 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 -> 46a2982bcd9fbf87ad95f35e8d160ffed7259af3c1cb1d5fe78d4df5a4783123 [2025-03-08 00:10:14,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 00:10:14,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 00:10:14,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 00:10:14,273 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 00:10:14,273 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 00:10:14,273 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i [2025-03-08 00:10:15,364 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f28b4323/e91b8f070d7440c6aa083dffd0b0ecb3/FLAG2af313a3d [2025-03-08 00:10:15,564 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 00:10:15,564 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i [2025-03-08 00:10:15,569 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f28b4323/e91b8f070d7440c6aa083dffd0b0ecb3/FLAG2af313a3d [2025-03-08 00:10:15,927 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f28b4323/e91b8f070d7440c6aa083dffd0b0ecb3 [2025-03-08 00:10:15,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 00:10:15,929 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 00:10:15,930 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 00:10:15,930 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 00:10:15,933 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 00:10:15,933 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:10:15" (1/1) ... [2025-03-08 00:10:15,934 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b6642a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:15, skipping insertion in model container [2025-03-08 00:10:15,934 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:10:15" (1/1) ... [2025-03-08 00:10:15,942 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 00:10:16,038 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_copy4_ground-1.i[816,829] [2025-03-08 00:10:16,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:10:16,059 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 00:10:16,067 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_copy4_ground-1.i[816,829] [2025-03-08 00:10:16,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 00:10:16,089 INFO L204 MainTranslator]: Completed translation [2025-03-08 00:10:16,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16 WrapperNode [2025-03-08 00:10:16,090 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 00:10:16,091 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 00:10:16,091 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 00:10:16,091 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 00:10:16,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (1/1) ... [2025-03-08 00:10:16,102 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (1/1) ... [2025-03-08 00:10:16,116 INFO L138 Inliner]: procedures = 16, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2025-03-08 00:10:16,117 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 00:10:16,118 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 00:10:16,118 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 00:10:16,118 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 00:10:16,123 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (1/1) ... [2025-03-08 00:10:16,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (1/1) ... [2025-03-08 00:10:16,130 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (1/1) ... [2025-03-08 00:10:16,140 INFO L175 MemorySlicer]: Split 13 memory accesses to 6 slices as follows [2, 2, 3, 2, 2, 2]. 23 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 1, 1, 1, 1]. [2025-03-08 00:10:16,141 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (1/1) ... [2025-03-08 00:10:16,141 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (1/1) ... [2025-03-08 00:10:16,148 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (1/1) ... [2025-03-08 00:10:16,151 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (1/1) ... [2025-03-08 00:10:16,152 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (1/1) ... [2025-03-08 00:10:16,152 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (1/1) ... [2025-03-08 00:10:16,156 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 00:10:16,157 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 00:10:16,158 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 00:10:16,158 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 00:10:16,159 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (1/1) ... [2025-03-08 00:10:16,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 00:10:16,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:10:16,187 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) [2025-03-08 00:10:16,191 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 [2025-03-08 00:10:16,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 00:10:16,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 00:10:16,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 00:10:16,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-08 00:10:16,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-08 00:10:16,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 00:10:16,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-08 00:10:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-08 00:10:16,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-03-08 00:10:16,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-03-08 00:10:16,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 00:10:16,271 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 00:10:16,272 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 00:10:16,379 INFO L1307 $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; [2025-03-08 00:10:16,384 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-08 00:10:16,384 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 00:10:16,389 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 00:10:16,391 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 00:10:16,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:10:16 BoogieIcfgContainer [2025-03-08 00:10:16,392 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 00:10:16,393 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 00:10:16,393 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 00:10:16,396 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 00:10:16,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 12:10:15" (1/3) ... [2025-03-08 00:10:16,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6809bf5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:10:16, skipping insertion in model container [2025-03-08 00:10:16,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:10:16" (2/3) ... [2025-03-08 00:10:16,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6809bf5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:10:16, skipping insertion in model container [2025-03-08 00:10:16,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:10:16" (3/3) ... [2025-03-08 00:10:16,399 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-1.i [2025-03-08 00:10:16,409 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 00:10:16,410 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_copy4_ground-1.i that has 1 procedures, 15 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-08 00:10:16,441 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 00:10:16,450 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;@5ddb2b59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 00:10:16,450 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 00:10:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 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) [2025-03-08 00:10:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 00:10:16,456 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:10:16,457 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:10:16,457 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:10:16,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:10:16,461 INFO L85 PathProgramCache]: Analyzing trace with hash -384949446, now seen corresponding path program 1 times [2025-03-08 00:10:16,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:10:16,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220466052] [2025-03-08 00:10:16,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:10:16,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:10:16,523 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 00:10:16,538 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 00:10:16,538 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:10:16,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:10:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:10:16,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:10:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220466052] [2025-03-08 00:10:16,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220466052] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:10:16,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 00:10:16,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 00:10:16,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737978825] [2025-03-08 00:10:16,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:10:16,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 00:10:16,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:10:16,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 00:10:16,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 00:10:16,647 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 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 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2025-03-08 00:10:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:10:16,670 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2025-03-08 00:10:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 00:10:16,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2025-03-08 00:10:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:10:16,678 INFO L225 Difference]: With dead ends: 28 [2025-03-08 00:10:16,678 INFO L226 Difference]: Without dead ends: 13 [2025-03-08 00:10:16,680 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 [2025-03-08 00:10:16,682 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 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 [2025-03-08 00:10:16,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:10:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-08 00:10:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-03-08 00:10:16,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 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) [2025-03-08 00:10:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2025-03-08 00:10:16,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 10 [2025-03-08 00:10:16,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:10:16,705 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2025-03-08 00:10:16,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2025-03-08 00:10:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2025-03-08 00:10:16,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 00:10:16,706 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:10:16,706 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:10:16,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 00:10:16,707 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:10:16,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:10:16,707 INFO L85 PathProgramCache]: Analyzing trace with hash 168812429, now seen corresponding path program 1 times [2025-03-08 00:10:16,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:10:16,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548860343] [2025-03-08 00:10:16,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:10:16,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:10:16,724 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 00:10:16,738 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 00:10:16,738 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:10:16,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:10:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 00:10:16,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:10:16,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548860343] [2025-03-08 00:10:16,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548860343] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:10:16,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176510298] [2025-03-08 00:10:16,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:10:16,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:10:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:10:16,806 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) [2025-03-08 00:10:16,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 00:10:16,863 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 00:10:16,878 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 00:10:16,878 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:10:16,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:10:16,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-08 00:10:16,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:10:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 00:10:16,904 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 00:10:16,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176510298] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 00:10:16,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 00:10:16,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-08 00:10:16,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455686320] [2025-03-08 00:10:16,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 00:10:16,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 00:10:16,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:10:16,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 00:10:16,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:10:16,907 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2025-03-08 00:10:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:10:16,933 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2025-03-08 00:10:16,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 00:10:16,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2025-03-08 00:10:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:10:16,934 INFO L225 Difference]: With dead ends: 25 [2025-03-08 00:10:16,934 INFO L226 Difference]: Without dead ends: 17 [2025-03-08 00:10:16,934 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 00:10:16,935 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:10:16,935 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:10:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-03-08 00:10:16,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-03-08 00:10:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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) [2025-03-08 00:10:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2025-03-08 00:10:16,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2025-03-08 00:10:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:10:16,940 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2025-03-08 00:10:16,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2025-03-08 00:10:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2025-03-08 00:10:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-08 00:10:16,941 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:10:16,941 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:10:16,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 00:10:17,142 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 [2025-03-08 00:10:17,142 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:10:17,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:10:17,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1862349453, now seen corresponding path program 1 times [2025-03-08 00:10:17,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:10:17,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815330508] [2025-03-08 00:10:17,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:10:17,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:10:17,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 00:10:17,159 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 00:10:17,159 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:10:17,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:10:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:10:17,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:10:17,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815330508] [2025-03-08 00:10:17,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815330508] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:10:17,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233008477] [2025-03-08 00:10:17,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 00:10:17,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:10:17,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:10:17,240 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) [2025-03-08 00:10:17,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 00:10:17,283 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 00:10:17,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 00:10:17,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 00:10:17,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:10:17,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-08 00:10:17,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:10:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:10:17,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:10:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:10:17,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233008477] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:10:17,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:10:17,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-08 00:10:17,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408935127] [2025-03-08 00:10:17,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:10:17,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 00:10:17,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:10:17,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 00:10:17,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-08 00:10:17,341 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2025-03-08 00:10:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:10:17,352 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2025-03-08 00:10:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 00:10:17,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 15 [2025-03-08 00:10:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:10:17,353 INFO L225 Difference]: With dead ends: 33 [2025-03-08 00:10:17,353 INFO L226 Difference]: Without dead ends: 20 [2025-03-08 00:10:17,353 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-08 00:10:17,354 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 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 [2025-03-08 00:10:17,354 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:10:17,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-08 00:10:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-08 00:10:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2025-03-08 00:10:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2025-03-08 00:10:17,356 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 15 [2025-03-08 00:10:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:10:17,357 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2025-03-08 00:10:17,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2025-03-08 00:10:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2025-03-08 00:10:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 00:10:17,357 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:10:17,357 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:10:17,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 00:10:17,558 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 [2025-03-08 00:10:17,558 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:10:17,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:10:17,558 INFO L85 PathProgramCache]: Analyzing trace with hash -258640774, now seen corresponding path program 2 times [2025-03-08 00:10:17,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:10:17,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521302523] [2025-03-08 00:10:17,559 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:10:17,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:10:17,572 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 00:10:17,589 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 00:10:17,589 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:10:17,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:10:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-08 00:10:17,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:10:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521302523] [2025-03-08 00:10:17,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521302523] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:10:17,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934251808] [2025-03-08 00:10:17,644 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 00:10:17,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:10:17,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:10:17,646 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) [2025-03-08 00:10:17,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 00:10:17,689 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 00:10:17,710 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 00:10:17,710 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 00:10:17,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:10:17,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 00:10:17,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:10:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:10:17,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:10:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 00:10:17,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934251808] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:10:17,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:10:17,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2025-03-08 00:10:17,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668392216] [2025-03-08 00:10:17,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:10:17,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 00:10:17,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:10:17,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 00:10:17,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-08 00:10:17,818 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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) [2025-03-08 00:10:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:10:17,863 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2025-03-08 00:10:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 00:10:17,864 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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 18 [2025-03-08 00:10:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:10:17,864 INFO L225 Difference]: With dead ends: 43 [2025-03-08 00:10:17,864 INFO L226 Difference]: Without dead ends: 30 [2025-03-08 00:10:17,864 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-08 00:10:17,865 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:10:17,865 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:10:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-08 00:10:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-03-08 00:10:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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) [2025-03-08 00:10:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2025-03-08 00:10:17,871 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2025-03-08 00:10:17,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:10:17,872 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2025-03-08 00:10:17,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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) [2025-03-08 00:10:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2025-03-08 00:10:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-08 00:10:17,873 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:10:17,873 INFO L218 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:10:17,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 00:10:18,073 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 [2025-03-08 00:10:18,074 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:10:18,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:10:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash 559327386, now seen corresponding path program 3 times [2025-03-08 00:10:18,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:10:18,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609638580] [2025-03-08 00:10:18,074 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:10:18,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:10:18,087 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 6 equivalence classes. [2025-03-08 00:10:18,096 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 28 statements. [2025-03-08 00:10:18,096 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 00:10:18,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:10:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-08 00:10:18,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:10:18,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609638580] [2025-03-08 00:10:18,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609638580] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:10:18,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304496890] [2025-03-08 00:10:18,155 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 00:10:18,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:10:18,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:10:18,158 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) [2025-03-08 00:10:18,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 00:10:18,241 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 6 equivalence classes. [2025-03-08 00:10:18,262 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 28 statements. [2025-03-08 00:10:18,262 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 00:10:18,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:10:18,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 00:10:18,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:10:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-08 00:10:18,275 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:10:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-08 00:10:18,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304496890] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:10:18,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:10:18,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-03-08 00:10:18,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330409905] [2025-03-08 00:10:18,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:10:18,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 00:10:18,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:10:18,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 00:10:18,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-08 00:10:18,295 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2025-03-08 00:10:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:10:18,351 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2025-03-08 00:10:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 00:10:18,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) Word has length 28 [2025-03-08 00:10:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:10:18,352 INFO L225 Difference]: With dead ends: 60 [2025-03-08 00:10:18,352 INFO L226 Difference]: Without dead ends: 46 [2025-03-08 00:10:18,353 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2025-03-08 00:10:18,353 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:10:18,353 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:10:18,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-08 00:10:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-03-08 00:10:18,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 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) [2025-03-08 00:10:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2025-03-08 00:10:18,357 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 28 [2025-03-08 00:10:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:10:18,357 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2025-03-08 00:10:18,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2025-03-08 00:10:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2025-03-08 00:10:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-03-08 00:10:18,358 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:10:18,358 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:10:18,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 00:10:18,558 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 [2025-03-08 00:10:18,558 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:10:18,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:10:18,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2064100250, now seen corresponding path program 4 times [2025-03-08 00:10:18,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:10:18,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188273909] [2025-03-08 00:10:18,560 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:10:18,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:10:18,582 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-08 00:10:18,596 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 00:10:18,597 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:10:18,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:10:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 00:10:18,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:10:18,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188273909] [2025-03-08 00:10:18,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188273909] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:10:18,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428783127] [2025-03-08 00:10:18,831 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 00:10:18,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:10:18,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:10:18,833 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) [2025-03-08 00:10:18,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 00:10:18,905 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 44 statements into 2 equivalence classes. [2025-03-08 00:10:18,941 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-08 00:10:18,941 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 00:10:18,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:10:18,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 00:10:18,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 00:10:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 00:10:18,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 00:10:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 00:10:19,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428783127] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 00:10:19,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 00:10:19,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-08 00:10:19,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415877651] [2025-03-08 00:10:19,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 00:10:19,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-08 00:10:19,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 00:10:19,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-08 00:10:19,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-08 00:10:19,158 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 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) [2025-03-08 00:10:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 00:10:19,187 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2025-03-08 00:10:19,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 00:10:19,189 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 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 44 [2025-03-08 00:10:19,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 00:10:19,190 INFO L225 Difference]: With dead ends: 91 [2025-03-08 00:10:19,190 INFO L226 Difference]: Without dead ends: 58 [2025-03-08 00:10:19,190 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-08 00:10:19,190 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 00:10:19,191 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 00:10:19,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-08 00:10:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-03-08 00:10:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 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) [2025-03-08 00:10:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2025-03-08 00:10:19,201 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 44 [2025-03-08 00:10:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 00:10:19,201 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2025-03-08 00:10:19,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 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) [2025-03-08 00:10:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2025-03-08 00:10:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-08 00:10:19,204 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 00:10:19,204 INFO L218 NwaCegarLoop]: trace histogram [22, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 00:10:19,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 00:10:19,405 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 [2025-03-08 00:10:19,405 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 00:10:19,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 00:10:19,405 INFO L85 PathProgramCache]: Analyzing trace with hash -345050662, now seen corresponding path program 5 times [2025-03-08 00:10:19,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 00:10:19,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844719766] [2025-03-08 00:10:19,405 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:10:19,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 00:10:19,426 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 56 statements into 12 equivalence classes. [2025-03-08 00:10:19,488 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 00:10:19,489 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-08 00:10:19,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 00:10:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-08 00:10:20,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 00:10:20,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844719766] [2025-03-08 00:10:20,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844719766] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 00:10:20,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431414276] [2025-03-08 00:10:20,027 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 00:10:20,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 00:10:20,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 00:10:20,029 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) [2025-03-08 00:10:20,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 00:10:20,116 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 56 statements into 12 equivalence classes.