./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f5e2fdf471d9474a6f7c402053ba8a4914a495c159bf70e3ae967f3495d9882 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 15:18:15,699 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 15:18:15,787 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 15:18:15,792 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 15:18:15,794 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 15:18:15,826 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 15:18:15,827 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 15:18:15,827 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 15:18:15,828 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 15:18:15,830 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 15:18:15,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 15:18:15,831 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 15:18:15,831 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 15:18:15,833 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 15:18:15,833 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 15:18:15,833 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 15:18:15,834 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 15:18:15,834 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 15:18:15,834 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 15:18:15,834 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 15:18:15,835 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 15:18:15,835 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 15:18:15,836 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 15:18:15,836 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 15:18:15,836 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 15:18:15,837 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 15:18:15,837 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 15:18:15,837 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 15:18:15,837 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 15:18:15,838 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 15:18:15,838 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 15:18:15,838 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 15:18:15,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 15:18:15,838 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 15:18:15,839 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 15:18:15,839 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 15:18:15,839 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 15:18:15,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 15:18:15,840 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 15:18:15,840 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 15:18:15,840 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 15:18:15,841 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 15:18:15,841 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f5e2fdf471d9474a6f7c402053ba8a4914a495c159bf70e3ae967f3495d9882 [2024-11-11 15:18:16,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 15:18:16,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 15:18:16,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 15:18:16,123 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 15:18:16,124 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 15:18:16,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2024-11-11 15:18:17,594 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 15:18:17,792 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 15:18:17,793 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2024-11-11 15:18:17,806 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56da23efd/b18beef149e64053b07939f40a92c04f/FLAG8ed37c798 [2024-11-11 15:18:17,822 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56da23efd/b18beef149e64053b07939f40a92c04f [2024-11-11 15:18:17,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 15:18:17,828 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 15:18:17,832 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 15:18:17,832 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 15:18:17,837 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 15:18:17,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:18:17" (1/1) ... [2024-11-11 15:18:17,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e22d426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:17, skipping insertion in model container [2024-11-11 15:18:17,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:18:17" (1/1) ... [2024-11-11 15:18:17,860 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 15:18:18,052 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i[816,829] [2024-11-11 15:18:18,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 15:18:18,110 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 15:18:18,144 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i[816,829] [2024-11-11 15:18:18,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 15:18:18,196 INFO L204 MainTranslator]: Completed translation [2024-11-11 15:18:18,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18 WrapperNode [2024-11-11 15:18:18,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 15:18:18,203 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 15:18:18,203 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 15:18:18,203 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 15:18:18,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (1/1) ... [2024-11-11 15:18:18,217 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (1/1) ... [2024-11-11 15:18:18,238 INFO L138 Inliner]: procedures = 16, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2024-11-11 15:18:18,239 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 15:18:18,242 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 15:18:18,242 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 15:18:18,242 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 15:18:18,251 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (1/1) ... [2024-11-11 15:18:18,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (1/1) ... [2024-11-11 15:18:18,253 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (1/1) ... [2024-11-11 15:18:18,272 INFO L175 MemorySlicer]: Split 11 memory accesses to 5 slices as follows [2, 2, 2, 3, 2]. 27 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-11-11 15:18:18,273 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (1/1) ... [2024-11-11 15:18:18,273 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (1/1) ... [2024-11-11 15:18:18,278 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (1/1) ... [2024-11-11 15:18:18,282 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (1/1) ... [2024-11-11 15:18:18,283 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (1/1) ... [2024-11-11 15:18:18,284 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (1/1) ... [2024-11-11 15:18:18,286 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 15:18:18,287 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 15:18:18,287 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 15:18:18,287 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 15:18:18,288 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (1/1) ... [2024-11-11 15:18:18,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 15:18:18,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:18:18,313 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) [2024-11-11 15:18:18,315 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 [2024-11-11 15:18:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 15:18:18,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 15:18:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 15:18:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-11 15:18:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-11 15:18:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-11 15:18:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-11 15:18:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-11 15:18:18,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-11 15:18:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-11 15:18:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-11 15:18:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-11 15:18:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 15:18:18,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 15:18:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-11 15:18:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-11 15:18:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-11 15:18:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-11 15:18:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-11 15:18:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-11 15:18:18,438 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 15:18:18,440 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 15:18:18,588 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-11 15:18:18,588 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 15:18:18,598 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 15:18:18,599 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-11 15:18:18,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:18:18 BoogieIcfgContainer [2024-11-11 15:18:18,600 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 15:18:18,602 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 15:18:18,602 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 15:18:18,606 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 15:18:18,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 03:18:17" (1/3) ... [2024-11-11 15:18:18,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed91c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:18:18, skipping insertion in model container [2024-11-11 15:18:18,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:18:18" (2/3) ... [2024-11-11 15:18:18,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed91c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:18:18, skipping insertion in model container [2024-11-11 15:18:18,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:18:18" (3/3) ... [2024-11-11 15:18:18,610 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2024-11-11 15:18:18,628 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 15:18:18,628 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 15:18:18,684 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 15:18:18,690 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;@23bac37f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 15:18:18,691 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 15:18:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) [2024-11-11 15:18:18,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-11 15:18:18,697 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:18:18,698 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:18:18,698 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:18:18,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:18:18,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2053894623, now seen corresponding path program 1 times [2024-11-11 15:18:18,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:18:18,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672182422] [2024-11-11 15:18:18,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:18:18,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:18:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:18:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:18:18,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:18:18,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672182422] [2024-11-11 15:18:18,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672182422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:18:18,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 15:18:18,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-11 15:18:18,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226971006] [2024-11-11 15:18:18,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:18:18,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 15:18:18,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:18:18,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 15:18:18,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 15:18:18,988 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:18:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:18:19,020 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2024-11-11 15:18:19,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 15:18:19,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-11 15:18:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:18:19,030 INFO L225 Difference]: With dead ends: 46 [2024-11-11 15:18:19,030 INFO L226 Difference]: Without dead ends: 22 [2024-11-11 15:18:19,034 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 15:18:19,039 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:18:19,040 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:18:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-11 15:18:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-11-11 15:18:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:18:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-11 15:18:19,068 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2024-11-11 15:18:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:18:19,068 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-11 15:18:19,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:18:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-11 15:18:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-11 15:18:19,069 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:18:19,069 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:18:19,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 15:18:19,070 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:18:19,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:18:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash -418223009, now seen corresponding path program 1 times [2024-11-11 15:18:19,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:18:19,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609280753] [2024-11-11 15:18:19,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:18:19,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:18:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:18:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 15:18:19,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:18:19,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609280753] [2024-11-11 15:18:19,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609280753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:18:19,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956801212] [2024-11-11 15:18:19,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:18:19,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:18:19,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:18:19,234 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) [2024-11-11 15:18:19,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 15:18:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:18:19,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-11 15:18:19,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:18:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 15:18:19,352 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 15:18:19,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956801212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 15:18:19,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 15:18:19,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-11 15:18:19,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841556891] [2024-11-11 15:18:19,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 15:18:19,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 15:18:19,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:18:19,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 15:18:19,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-11 15:18:19,357 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2024-11-11 15:18:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:18:19,396 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2024-11-11 15:18:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 15:18:19,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-11 15:18:19,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:18:19,398 INFO L225 Difference]: With dead ends: 40 [2024-11-11 15:18:19,398 INFO L226 Difference]: Without dead ends: 27 [2024-11-11 15:18:19,399 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-11 15:18:19,400 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:18:19,401 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:18:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-11 15:18:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2024-11-11 15:18:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:18:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-11 15:18:19,408 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2024-11-11 15:18:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:18:19,409 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-11 15:18:19,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2024-11-11 15:18:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-11 15:18:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-11 15:18:19,410 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:18:19,410 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:18:19,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-11 15:18:19,614 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 [2024-11-11 15:18:19,615 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:18:19,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:18:19,616 INFO L85 PathProgramCache]: Analyzing trace with hash 241580185, now seen corresponding path program 1 times [2024-11-11 15:18:19,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:18:19,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975017516] [2024-11-11 15:18:19,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:18:19,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:18:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:18:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 15:18:19,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:18:19,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975017516] [2024-11-11 15:18:19,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975017516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:18:19,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081533554] [2024-11-11 15:18:19,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:18:19,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:18:19,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:18:19,772 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) [2024-11-11 15:18:19,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 15:18:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:18:19,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-11 15:18:19,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:18:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 15:18:19,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:18:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 15:18:19,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081533554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:18:19,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:18:19,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-11 15:18:19,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435732929] [2024-11-11 15:18:19,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:18:19,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-11 15:18:19,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:18:19,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-11 15:18:19,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-11 15:18:19,933 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:18:19,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:18:19,962 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2024-11-11 15:18:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-11 15:18:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-11 15:18:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:18:19,964 INFO L225 Difference]: With dead ends: 49 [2024-11-11 15:18:19,964 INFO L226 Difference]: Without dead ends: 30 [2024-11-11 15:18:19,964 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-11 15:18:19,966 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 15:18:19,967 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 15:18:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-11 15:18:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-11 15:18:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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) [2024-11-11 15:18:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-11 15:18:19,974 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2024-11-11 15:18:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:18:19,974 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-11 15:18:19,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:18:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-11 15:18:19,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-11 15:18:19,975 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:18:19,975 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:18:19,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 15:18:20,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-11 15:18:20,177 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:18:20,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:18:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash 886739667, now seen corresponding path program 2 times [2024-11-11 15:18:20,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:18:20,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871274379] [2024-11-11 15:18:20,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:18:20,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:18:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:18:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-11 15:18:20,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:18:20,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871274379] [2024-11-11 15:18:20,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871274379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:18:20,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004881385] [2024-11-11 15:18:20,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 15:18:20,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:18:20,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:18:20,289 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) [2024-11-11 15:18:20,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 15:18:20,381 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 15:18:20,381 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:18:20,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-11 15:18:20,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:18:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 15:18:20,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:18:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 15:18:20,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004881385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:18:20,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:18:20,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-11 15:18:20,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520250328] [2024-11-11 15:18:20,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:18:20,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 15:18:20,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:18:20,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 15:18:20,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-11 15:18:20,548 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 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) [2024-11-11 15:18:20,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:18:20,661 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2024-11-11 15:18:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-11 15:18:20,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 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 27 [2024-11-11 15:18:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:18:20,665 INFO L225 Difference]: With dead ends: 70 [2024-11-11 15:18:20,665 INFO L226 Difference]: Without dead ends: 51 [2024-11-11 15:18:20,665 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-11 15:18:20,666 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:18:20,666 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 90 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:18:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-11 15:18:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2024-11-11 15:18:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 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) [2024-11-11 15:18:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-11 15:18:20,678 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 27 [2024-11-11 15:18:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:18:20,678 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-11 15:18:20,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 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) [2024-11-11 15:18:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-11 15:18:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-11 15:18:20,679 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:18:20,679 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:18:20,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-11 15:18:20,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:18:20,881 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:18:20,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:18:20,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1464945409, now seen corresponding path program 3 times [2024-11-11 15:18:20,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:18:20,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565313160] [2024-11-11 15:18:20,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:18:20,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:18:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:18:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-11 15:18:21,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:18:21,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565313160] [2024-11-11 15:18:21,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565313160] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:18:21,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20743022] [2024-11-11 15:18:21,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 15:18:21,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:18:21,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:18:21,241 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) [2024-11-11 15:18:21,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 15:18:21,341 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-11 15:18:21,341 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:18:21,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-11 15:18:21,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:18:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-11 15:18:21,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:18:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-11 15:18:21,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20743022] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:18:21,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:18:21,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2024-11-11 15:18:21,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002708372] [2024-11-11 15:18:21,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:18:21,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-11 15:18:21,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:18:21,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-11 15:18:21,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-11-11 15:18:21,445 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:18:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:18:21,580 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2024-11-11 15:18:21,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-11 15:18:21,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-11 15:18:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:18:21,582 INFO L225 Difference]: With dead ends: 100 [2024-11-11 15:18:21,583 INFO L226 Difference]: Without dead ends: 75 [2024-11-11 15:18:21,584 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-11-11 15:18:21,584 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 15:18:21,585 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 62 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 15:18:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-11 15:18:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2024-11-11 15:18:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 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) [2024-11-11 15:18:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2024-11-11 15:18:21,596 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 45 [2024-11-11 15:18:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:18:21,596 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2024-11-11 15:18:21,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 15:18:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2024-11-11 15:18:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-11 15:18:21,598 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:18:21,598 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:18:21,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 15:18:21,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:18:21,799 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:18:21,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:18:21,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1964985639, now seen corresponding path program 4 times [2024-11-11 15:18:21,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:18:21,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867123576] [2024-11-11 15:18:21,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:18:21,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:18:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:18:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-11 15:18:22,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:18:22,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867123576] [2024-11-11 15:18:22,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867123576] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:18:22,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208490736] [2024-11-11 15:18:22,161 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 15:18:22,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:18:22,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:18:22,163 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) [2024-11-11 15:18:22,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 15:18:22,280 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 15:18:22,280 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 15:18:22,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-11 15:18:22,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 15:18:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-11-11 15:18:22,396 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 15:18:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-11-11 15:18:22,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208490736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 15:18:22,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 15:18:22,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2024-11-11 15:18:22,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69416595] [2024-11-11 15:18:22,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 15:18:22,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-11 15:18:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 15:18:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-11 15:18:22,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2024-11-11 15:18:22,564 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 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) [2024-11-11 15:18:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 15:18:22,801 INFO L93 Difference]: Finished difference Result 174 states and 206 transitions. [2024-11-11 15:18:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-11 15:18:22,801 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 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 71 [2024-11-11 15:18:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 15:18:22,803 INFO L225 Difference]: With dead ends: 174 [2024-11-11 15:18:22,803 INFO L226 Difference]: Without dead ends: 125 [2024-11-11 15:18:22,804 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2024-11-11 15:18:22,804 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 15:18:22,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 127 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 15:18:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-11 15:18:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2024-11-11 15:18:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 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) [2024-11-11 15:18:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2024-11-11 15:18:22,819 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 71 [2024-11-11 15:18:22,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 15:18:22,819 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2024-11-11 15:18:22,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 28 states have internal predecessors, (81), 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) [2024-11-11 15:18:22,823 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2024-11-11 15:18:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-11 15:18:22,824 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 15:18:22,825 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 15:18:22,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-11 15:18:23,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:18:23,026 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 15:18:23,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 15:18:23,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1940480587, now seen corresponding path program 5 times [2024-11-11 15:18:23,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 15:18:23,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103538219] [2024-11-11 15:18:23,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 15:18:23,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 15:18:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 15:18:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2024-11-11 15:18:23,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 15:18:23,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103538219] [2024-11-11 15:18:23,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103538219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 15:18:23,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096594128] [2024-11-11 15:18:23,508 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-11 15:18:23,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 15:18:23,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 15:18:23,510 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) [2024-11-11 15:18:23,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process