./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/n.c24.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 ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 17:46:42,875 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 17:46:42,914 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 17:46:42,918 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 17:46:42,920 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 17:46:42,941 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 17:46:42,942 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 17:46:42,942 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 17:46:42,943 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 17:46:42,943 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 17:46:42,943 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 17:46:42,943 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 17:46:42,944 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 17:46:42,944 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 17:46:42,944 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 17:46:42,944 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 17:46:42,945 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 17:46:42,945 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 17:46:42,945 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 17:46:42,945 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 17:46:42,945 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 17:46:42,945 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 17:46:42,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 17:46:42,945 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 17:46:42,945 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 17:46:42,945 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 17:46:42,946 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 17:46:42,946 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 17:46:42,946 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 17:46:42,946 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 17:46:42,946 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 17:46:42,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 17:46:42,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:46:42,947 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 17:46:42,947 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 17:46:42,947 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 17:46:42,947 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 17:46:42,947 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 17:46:42,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 17:46:42,947 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 17:46:42,947 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 17:46:42,947 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 17:46:42,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 17:46:42,947 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 -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2025-03-16 17:46:43,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 17:46:43,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 17:46:43,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 17:46:43,286 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 17:46:43,286 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 17:46:43,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/n.c24.i [2025-03-16 17:46:44,405 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba30d5466/cf13695201eb4a4396773fe908ea521e/FLAGcfaf0de87 [2025-03-16 17:46:44,646 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 17:46:44,647 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/n.c24.i [2025-03-16 17:46:44,656 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba30d5466/cf13695201eb4a4396773fe908ea521e/FLAGcfaf0de87 [2025-03-16 17:46:44,970 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba30d5466/cf13695201eb4a4396773fe908ea521e [2025-03-16 17:46:44,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 17:46:44,973 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 17:46:44,974 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 17:46:44,974 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 17:46:44,977 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 17:46:44,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:46:44" (1/1) ... [2025-03-16 17:46:44,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d9ecca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:44, skipping insertion in model container [2025-03-16 17:46:44,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:46:44" (1/1) ... [2025-03-16 17:46:44,990 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 17:46:45,084 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/loops/n.c24.i[805,818] [2025-03-16 17:46:45,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:46:45,119 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 17:46:45,127 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/loops/n.c24.i[805,818] [2025-03-16 17:46:45,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:46:45,171 INFO L204 MainTranslator]: Completed translation [2025-03-16 17:46:45,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45 WrapperNode [2025-03-16 17:46:45,172 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 17:46:45,173 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 17:46:45,173 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 17:46:45,173 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 17:46:45,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (1/1) ... [2025-03-16 17:46:45,188 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (1/1) ... [2025-03-16 17:46:45,207 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2025-03-16 17:46:45,209 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 17:46:45,210 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 17:46:45,210 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 17:46:45,210 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 17:46:45,216 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (1/1) ... [2025-03-16 17:46:45,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (1/1) ... [2025-03-16 17:46:45,218 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (1/1) ... [2025-03-16 17:46:45,233 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 2, 9]. 43 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 1, 5]. [2025-03-16 17:46:45,234 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (1/1) ... [2025-03-16 17:46:45,234 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (1/1) ... [2025-03-16 17:46:45,239 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (1/1) ... [2025-03-16 17:46:45,242 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (1/1) ... [2025-03-16 17:46:45,245 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (1/1) ... [2025-03-16 17:46:45,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (1/1) ... [2025-03-16 17:46:45,251 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 17:46:45,252 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 17:46:45,254 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 17:46:45,254 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 17:46:45,255 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (1/1) ... [2025-03-16 17:46:45,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:46:45,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:46:45,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 17:46:45,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 17:46:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 17:46:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-03-16 17:46:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-03-16 17:46:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-03-16 17:46:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2025-03-16 17:46:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 17:46:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 17:46:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 17:46:45,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 17:46:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-16 17:46:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 17:46:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 17:46:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 17:46:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 17:46:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-16 17:46:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 17:46:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 17:46:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 17:46:45,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-16 17:46:45,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#0 [2025-03-16 17:46:45,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#1 [2025-03-16 17:46:45,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#2 [2025-03-16 17:46:45,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#3 [2025-03-16 17:46:45,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 17:46:45,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 17:46:45,388 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 17:46:45,389 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 17:46:45,565 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L147: havoc foo_#t~mem3#1; [2025-03-16 17:46:45,565 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L143: havoc bar_#t~nondet1#1; [2025-03-16 17:46:45,566 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L150: call ULTIMATE.dealloc(main_~#tel_data~0#1.base, main_~#tel_data~0#1.offset);havoc main_~#tel_data~0#1.base, main_~#tel_data~0#1.offset;call ULTIMATE.dealloc(main_~#x~0#1.base, main_~#x~0#1.offset);havoc main_~#x~0#1.base, main_~#x~0#1.offset; [2025-03-16 17:46:45,574 INFO L? ?]: Removed 35 outVars from TransFormulas that were not future-live. [2025-03-16 17:46:45,574 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 17:46:45,580 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 17:46:45,580 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 17:46:45,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:46:45 BoogieIcfgContainer [2025-03-16 17:46:45,580 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 17:46:45,582 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 17:46:45,582 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 17:46:45,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 17:46:45,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 05:46:44" (1/3) ... [2025-03-16 17:46:45,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3373c577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:46:45, skipping insertion in model container [2025-03-16 17:46:45,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:46:45" (2/3) ... [2025-03-16 17:46:45,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3373c577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:46:45, skipping insertion in model container [2025-03-16 17:46:45,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:46:45" (3/3) ... [2025-03-16 17:46:45,587 INFO L128 eAbstractionObserver]: Analyzing ICFG n.c24.i [2025-03-16 17:46:45,596 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 17:46:45,597 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG n.c24.i that has 1 procedures, 29 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-16 17:46:45,644 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 17:46:45,654 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;@266ba7c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 17:46:45,654 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 17:46:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 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) [2025-03-16 17:46:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-03-16 17:46:45,663 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:46:45,663 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-03-16 17:46:45,663 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:46:45,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:46:45,667 INFO L85 PathProgramCache]: Analyzing trace with hash 86729480, now seen corresponding path program 1 times [2025-03-16 17:46:45,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:46:45,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583605825] [2025-03-16 17:46:45,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:46:45,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:46:45,722 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-16 17:46:45,739 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-16 17:46:45,739 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:46:45,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:46:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:46:45,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:46:45,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583605825] [2025-03-16 17:46:45,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583605825] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:46:45,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:46:45,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 17:46:45,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831327297] [2025-03-16 17:46:45,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:46:45,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 17:46:45,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:46:45,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 17:46:45,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 17:46:45,822 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2025-03-16 17:46:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:46:45,853 INFO L93 Difference]: Finished difference Result 78 states and 122 transitions. [2025-03-16 17:46:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 17:46:45,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2025-03-16 17:46:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:46:45,859 INFO L225 Difference]: With dead ends: 78 [2025-03-16 17:46:45,859 INFO L226 Difference]: Without dead ends: 46 [2025-03-16 17:46:45,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 17:46:45,862 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:46:45,863 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:46:45,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-16 17:46:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 27. [2025-03-16 17:46:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 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) [2025-03-16 17:46:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2025-03-16 17:46:45,882 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 5 [2025-03-16 17:46:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:46:45,883 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2025-03-16 17:46:45,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2025-03-16 17:46:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2025-03-16 17:46:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-16 17:46:45,883 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:46:45,883 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:46:45,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 17:46:45,883 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:46:45,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:46:45,885 INFO L85 PathProgramCache]: Analyzing trace with hash -610097352, now seen corresponding path program 1 times [2025-03-16 17:46:45,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:46:45,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869193192] [2025-03-16 17:46:45,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:46:45,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:46:45,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-16 17:46:45,910 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 17:46:45,910 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:46:45,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:46:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 17:46:45,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:46:45,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869193192] [2025-03-16 17:46:45,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869193192] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:46:45,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933670571] [2025-03-16 17:46:45,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:46:45,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:46:45,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:46:45,986 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:46:45,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 17:46:46,042 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-16 17:46:46,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 17:46:46,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:46:46,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:46:46,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 17:46:46,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:46:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 17:46:46,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:46:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 17:46:46,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933670571] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:46:46,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:46:46,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-03-16 17:46:46,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606456882] [2025-03-16 17:46:46,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:46:46,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 17:46:46,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:46:46,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 17:46:46,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-16 17:46:46,104 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2025-03-16 17:46:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:46:46,183 INFO L93 Difference]: Finished difference Result 114 states and 166 transitions. [2025-03-16 17:46:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 17:46:46,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 10 [2025-03-16 17:46:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:46:46,184 INFO L225 Difference]: With dead ends: 114 [2025-03-16 17:46:46,184 INFO L226 Difference]: Without dead ends: 90 [2025-03-16 17:46:46,184 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-16 17:46:46,185 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 140 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:46:46,185 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 103 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:46:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-03-16 17:46:46,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2025-03-16 17:46:46,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.4269662921348314) internal successors, (127), 89 states have internal predecessors, (127), 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) [2025-03-16 17:46:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 127 transitions. [2025-03-16 17:46:46,191 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 127 transitions. Word has length 10 [2025-03-16 17:46:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:46:46,192 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 127 transitions. [2025-03-16 17:46:46,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2025-03-16 17:46:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 127 transitions. [2025-03-16 17:46:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 17:46:46,192 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:46:46,193 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-16 17:46:46,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 17:46:46,393 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 [2025-03-16 17:46:46,393 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:46:46,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:46:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash 600618168, now seen corresponding path program 2 times [2025-03-16 17:46:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:46:46,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153463056] [2025-03-16 17:46:46,394 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:46:46,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:46:46,410 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-16 17:46:46,438 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 17:46:46,442 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:46:46,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:46:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-16 17:46:46,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:46:46,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153463056] [2025-03-16 17:46:46,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153463056] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:46:46,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:46:46,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 17:46:46,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555203784] [2025-03-16 17:46:46,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:46:46,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 17:46:46,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:46:46,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 17:46:46,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 17:46:46,573 INFO L87 Difference]: Start difference. First operand 90 states and 127 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2025-03-16 17:46:46,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:46:46,603 INFO L93 Difference]: Finished difference Result 171 states and 244 transitions. [2025-03-16 17:46:46,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 17:46:46,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 25 [2025-03-16 17:46:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:46:46,606 INFO L225 Difference]: With dead ends: 171 [2025-03-16 17:46:46,608 INFO L226 Difference]: Without dead ends: 168 [2025-03-16 17:46:46,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 17:46:46,608 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:46:46,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 96 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:46:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2025-03-16 17:46:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 91. [2025-03-16 17:46:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4333333333333333) internal successors, (129), 90 states have internal predecessors, (129), 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) [2025-03-16 17:46:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 129 transitions. [2025-03-16 17:46:46,623 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 129 transitions. Word has length 25 [2025-03-16 17:46:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:46:46,623 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 129 transitions. [2025-03-16 17:46:46,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2025-03-16 17:46:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 129 transitions. [2025-03-16 17:46:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-16 17:46:46,625 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:46:46,625 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:46:46,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 17:46:46,625 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:46:46,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:46:46,626 INFO L85 PathProgramCache]: Analyzing trace with hash 142433235, now seen corresponding path program 1 times [2025-03-16 17:46:46,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:46:46,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798729751] [2025-03-16 17:46:46,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:46:46,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:46:46,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-16 17:46:46,651 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 17:46:46,651 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:46:46,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:46:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-16 17:46:46,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:46:46,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798729751] [2025-03-16 17:46:46,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798729751] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:46:46,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930738512] [2025-03-16 17:46:46,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:46:46,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:46:46,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:46:46,758 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:46:46,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 17:46:46,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-16 17:46:46,837 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-16 17:46:46,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:46:46,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:46:46,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 17:46:46,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:46:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-16 17:46:46,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:46:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-16 17:46:46,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930738512] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:46:46,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:46:46,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-16 17:46:46,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504292466] [2025-03-16 17:46:46,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:46:46,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 17:46:46,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:46:46,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 17:46:46,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-03-16 17:46:46,914 INFO L87 Difference]: Start difference. First operand 91 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2025-03-16 17:46:47,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:46:47,043 INFO L93 Difference]: Finished difference Result 315 states and 462 transitions. [2025-03-16 17:46:47,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 17:46:47,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 30 [2025-03-16 17:46:47,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:46:47,044 INFO L225 Difference]: With dead ends: 315 [2025-03-16 17:46:47,046 INFO L226 Difference]: Without dead ends: 230 [2025-03-16 17:46:47,047 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-03-16 17:46:47,047 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 532 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:46:47,048 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 245 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:46:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2025-03-16 17:46:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 217. [2025-03-16 17:46:47,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4305555555555556) internal successors, (309), 216 states have internal predecessors, (309), 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) [2025-03-16 17:46:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 309 transitions. [2025-03-16 17:46:47,072 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 309 transitions. Word has length 30 [2025-03-16 17:46:47,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:46:47,072 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 309 transitions. [2025-03-16 17:46:47,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2025-03-16 17:46:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 309 transitions. [2025-03-16 17:46:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-16 17:46:47,075 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:46:47,075 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:46:47,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 17:46:47,275 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,SelfDestructingSolverStorable3 [2025-03-16 17:46:47,276 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:46:47,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:46:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash 150829643, now seen corresponding path program 2 times [2025-03-16 17:46:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:46:47,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784182837] [2025-03-16 17:46:47,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:46:47,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:46:47,295 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 60 statements into 2 equivalence classes. [2025-03-16 17:46:47,309 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 17:46:47,309 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:46:47,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:46:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2025-03-16 17:46:47,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:46:47,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784182837] [2025-03-16 17:46:47,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784182837] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:46:47,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563668930] [2025-03-16 17:46:47,555 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:46:47,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:46:47,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:46:47,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:46:47,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 17:46:47,612 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 60 statements into 2 equivalence classes. [2025-03-16 17:46:47,645 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 17:46:47,645 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:46:47,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:46:47,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 17:46:47,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:46:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2025-03-16 17:46:47,682 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:46:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2025-03-16 17:46:47,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563668930] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:46:47,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:46:47,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-03-16 17:46:47,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531257420] [2025-03-16 17:46:47,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:46:47,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 17:46:47,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:46:47,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 17:46:47,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-03-16 17:46:47,879 INFO L87 Difference]: Start difference. First operand 217 states and 309 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 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) [2025-03-16 17:46:48,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:46:48,159 INFO L93 Difference]: Finished difference Result 699 states and 1026 transitions. [2025-03-16 17:46:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 17:46:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 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 60 [2025-03-16 17:46:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:46:48,161 INFO L225 Difference]: With dead ends: 699 [2025-03-16 17:46:48,162 INFO L226 Difference]: Without dead ends: 494 [2025-03-16 17:46:48,163 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-03-16 17:46:48,165 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 1820 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1820 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:46:48,165 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1820 Valid, 517 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:46:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2025-03-16 17:46:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 469. [2025-03-16 17:46:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.4294871794871795) internal successors, (669), 468 states have internal predecessors, (669), 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) [2025-03-16 17:46:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 669 transitions. [2025-03-16 17:46:48,207 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 669 transitions. Word has length 60 [2025-03-16 17:46:48,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:46:48,207 INFO L471 AbstractCegarLoop]: Abstraction has 469 states and 669 transitions. [2025-03-16 17:46:48,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 states have internal predecessors, (36), 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) [2025-03-16 17:46:48,207 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 669 transitions. [2025-03-16 17:46:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-03-16 17:46:48,210 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:46:48,210 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:46:48,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 17:46:48,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:46:48,411 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:46:48,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:46:48,412 INFO L85 PathProgramCache]: Analyzing trace with hash -732242117, now seen corresponding path program 3 times [2025-03-16 17:46:48,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:46:48,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370769901] [2025-03-16 17:46:48,412 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:46:48,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:46:48,437 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 120 statements into 23 equivalence classes. [2025-03-16 17:46:48,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 22 of 120 statements. [2025-03-16 17:46:48,450 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 17:46:48,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:46:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2025-03-16 17:46:48,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:46:48,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370769901] [2025-03-16 17:46:48,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370769901] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:46:48,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117247063] [2025-03-16 17:46:48,508 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:46:48,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:46:48,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:46:48,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:46:48,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 17:46:48,575 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 120 statements into 23 equivalence classes. [2025-03-16 17:46:48,590 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 22 of 120 statements. [2025-03-16 17:46:48,591 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 17:46:48,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:46:48,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 17:46:48,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:46:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2025-03-16 17:46:48,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:46:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2025-03-16 17:46:48,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117247063] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:46:48,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:46:48,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2025-03-16 17:46:48,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538871336] [2025-03-16 17:46:48,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:46:48,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 17:46:48,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:46:48,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 17:46:48,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2025-03-16 17:46:48,774 INFO L87 Difference]: Start difference. First operand 469 states and 669 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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) [2025-03-16 17:46:48,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:46:48,880 INFO L93 Difference]: Finished difference Result 1806 states and 2622 transitions. [2025-03-16 17:46:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 17:46:48,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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 120 [2025-03-16 17:46:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:46:48,886 INFO L225 Difference]: With dead ends: 1806 [2025-03-16 17:46:48,887 INFO L226 Difference]: Without dead ends: 1803 [2025-03-16 17:46:48,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2025-03-16 17:46:48,888 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 229 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:46:48,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 297 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:46:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2025-03-16 17:46:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 520. [2025-03-16 17:46:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.439306358381503) internal successors, (747), 519 states have internal predecessors, (747), 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) [2025-03-16 17:46:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 747 transitions. [2025-03-16 17:46:48,932 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 747 transitions. Word has length 120 [2025-03-16 17:46:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:46:48,932 INFO L471 AbstractCegarLoop]: Abstraction has 520 states and 747 transitions. [2025-03-16 17:46:48,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 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) [2025-03-16 17:46:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 747 transitions. [2025-03-16 17:46:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2025-03-16 17:46:48,933 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:46:48,934 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-16 17:46:48,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 17:46:49,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:46:49,134 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:46:49,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:46:49,135 INFO L85 PathProgramCache]: Analyzing trace with hash 609734160, now seen corresponding path program 4 times [2025-03-16 17:46:49,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:46:49,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667255261] [2025-03-16 17:46:49,135 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:46:49,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:46:49,163 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 135 statements into 2 equivalence classes. [2025-03-16 17:46:49,185 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 135 of 135 statements. [2025-03-16 17:46:49,186 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:46:49,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:46:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 127 proven. 34 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2025-03-16 17:46:49,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:46:49,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667255261] [2025-03-16 17:46:49,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667255261] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:46:49,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12061830] [2025-03-16 17:46:49,513 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:46:49,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:46:49,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:46:49,514 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:46:49,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 17:46:49,598 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 135 statements into 2 equivalence classes. [2025-03-16 17:46:49,668 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 135 of 135 statements. [2025-03-16 17:46:49,668 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:46:49,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:46:49,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 17:46:49,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:46:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 0 proven. 1030 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2025-03-16 17:46:50,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:46:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 0 proven. 1030 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2025-03-16 17:46:50,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12061830] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:46:50,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:46:50,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25, 25] total 54 [2025-03-16 17:46:50,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654127626] [2025-03-16 17:46:50,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:46:50,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-03-16 17:46:50,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:46:50,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-03-16 17:46:50,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=1722, Unknown=0, NotChecked=0, Total=2862 [2025-03-16 17:46:50,902 INFO L87 Difference]: Start difference. First operand 520 states and 747 transitions. Second operand has 54 states, 54 states have (on average 4.12962962962963) internal successors, (223), 54 states have internal predecessors, (223), 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) [2025-03-16 17:47:00,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:47:00,051 INFO L93 Difference]: Finished difference Result 6059 states and 8843 transitions. [2025-03-16 17:47:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 284 states. [2025-03-16 17:47:00,051 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.12962962962963) internal successors, (223), 54 states have internal predecessors, (223), 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 135 [2025-03-16 17:47:00,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:47:00,066 INFO L225 Difference]: With dead ends: 6059 [2025-03-16 17:47:00,066 INFO L226 Difference]: Without dead ends: 5562 [2025-03-16 17:47:00,087 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27490 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12410, Invalid=67962, Unknown=0, NotChecked=0, Total=80372 [2025-03-16 17:47:00,088 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 26789 mSDsluCounter, 5261 mSDsCounter, 0 mSdLazyCounter, 2146 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26789 SdHoareTripleChecker+Valid, 5372 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-16 17:47:00,088 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26789 Valid, 5372 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2146 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-16 17:47:00,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5562 states. [2025-03-16 17:47:00,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5562 to 1041. [2025-03-16 17:47:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 1.435576923076923) internal successors, (1493), 1040 states have internal predecessors, (1493), 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) [2025-03-16 17:47:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1493 transitions. [2025-03-16 17:47:00,176 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1493 transitions. Word has length 135 [2025-03-16 17:47:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:47:00,176 INFO L471 AbstractCegarLoop]: Abstraction has 1041 states and 1493 transitions. [2025-03-16 17:47:00,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.12962962962963) internal successors, (223), 54 states have internal predecessors, (223), 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) [2025-03-16 17:47:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1493 transitions. [2025-03-16 17:47:00,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2025-03-16 17:47:00,179 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:47:00,180 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2025-03-16 17:47:00,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 17:47:00,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:47:00,380 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:47:00,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:47:00,381 INFO L85 PathProgramCache]: Analyzing trace with hash 744231771, now seen corresponding path program 5 times [2025-03-16 17:47:00,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:47:00,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13553025] [2025-03-16 17:47:00,381 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:47:00,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:47:00,413 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 260 statements into 47 equivalence classes. [2025-03-16 17:47:00,641 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) and asserted 260 of 260 statements. [2025-03-16 17:47:00,641 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2025-03-16 17:47:00,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:47:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5547 backedges. 316 proven. 55 refuted. 0 times theorem prover too weak. 5176 trivial. 0 not checked. [2025-03-16 17:47:01,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:47:01,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13553025] [2025-03-16 17:47:01,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13553025] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:47:01,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156308844] [2025-03-16 17:47:01,096 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:47:01,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:47:01,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:47:01,098 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:47:01,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 17:47:01,212 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 260 statements into 47 equivalence classes. [2025-03-16 17:47:49,780 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) and asserted 260 of 260 statements. [2025-03-16 17:47:49,781 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2025-03-16 17:47:49,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:47:49,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-16 17:47:49,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:47:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5547 backedges. 0 proven. 4411 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2025-03-16 17:47:50,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:47:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5547 backedges. 0 proven. 4411 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2025-03-16 17:47:52,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156308844] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:47:52,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:47:52,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 49, 49] total 103 [2025-03-16 17:47:52,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887831150] [2025-03-16 17:47:52,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:47:52,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2025-03-16 17:47:52,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:47:52,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2025-03-16 17:47:52,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4579, Invalid=5927, Unknown=0, NotChecked=0, Total=10506 [2025-03-16 17:47:52,807 INFO L87 Difference]: Start difference. First operand 1041 states and 1493 transitions. Second operand has 103 states, 103 states have (on average 4.077669902912621) internal successors, (420), 103 states have internal predecessors, (420), 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)