./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-2.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 64683904124af3c899dbc8dc5465d8741c0ff10567af23b7315c834db1157458 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 14:58:50,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 14:58:50,349 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 14:58:50,353 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 14:58:50,354 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 14:58:50,372 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 14:58:50,374 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 14:58:50,374 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 14:58:50,375 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 14:58:50,376 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 14:58:50,376 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 14:58:50,376 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 14:58:50,377 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 14:58:50,378 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 14:58:50,379 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 14:58:50,379 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 14:58:50,379 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 14:58:50,379 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 14:58:50,380 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 14:58:50,380 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 14:58:50,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 14:58:50,384 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 14:58:50,384 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 14:58:50,384 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 14:58:50,384 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 14:58:50,385 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 14:58:50,385 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 14:58:50,385 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 14:58:50,385 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 14:58:50,385 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 14:58:50,385 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 14:58:50,385 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 14:58:50,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 14:58:50,386 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 14:58:50,386 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 14:58:50,386 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 14:58:50,386 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 14:58:50,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 14:58:50,387 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 14:58:50,387 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 14:58:50,387 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 14:58:50,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 14:58:50,389 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64683904124af3c899dbc8dc5465d8741c0ff10567af23b7315c834db1157458 [2024-10-24 14:58:50,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 14:58:50,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 14:58:50,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 14:58:50,613 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 14:58:50,613 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 14:58:50,614 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-2.i [2024-10-24 14:58:51,958 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 14:58:52,202 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 14:58:52,202 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-2.i [2024-10-24 14:58:52,227 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17e83c12f/68961034896a43be96796cb43a8d4a21/FLAG8478051a2 [2024-10-24 14:58:52,521 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17e83c12f/68961034896a43be96796cb43a8d4a21 [2024-10-24 14:58:52,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 14:58:52,524 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 14:58:52,530 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 14:58:52,533 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 14:58:52,537 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 14:58:52,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:58:52" (1/1) ... [2024-10-24 14:58:52,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c38662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:52, skipping insertion in model container [2024-10-24 14:58:52,539 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:58:52" (1/1) ... [2024-10-24 14:58:52,580 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 14:58:52,959 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-2.i[33021,33034] [2024-10-24 14:58:53,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 14:58:53,105 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 14:58:53,138 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test4-2.i[33021,33034] [2024-10-24 14:58:53,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 14:58:53,218 INFO L204 MainTranslator]: Completed translation [2024-10-24 14:58:53,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53 WrapperNode [2024-10-24 14:58:53,218 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 14:58:53,219 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 14:58:53,219 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 14:58:53,219 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 14:58:53,226 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (1/1) ... [2024-10-24 14:58:53,257 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (1/1) ... [2024-10-24 14:58:53,318 INFO L138 Inliner]: procedures = 176, calls = 386, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1752 [2024-10-24 14:58:53,318 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 14:58:53,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 14:58:53,320 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 14:58:53,320 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 14:58:53,329 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (1/1) ... [2024-10-24 14:58:53,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (1/1) ... [2024-10-24 14:58:53,345 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (1/1) ... [2024-10-24 14:58:53,442 INFO L175 MemorySlicer]: Split 357 memory accesses to 2 slices as follows [2, 355]. 99 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 90 writes are split as follows [0, 90]. [2024-10-24 14:58:53,443 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (1/1) ... [2024-10-24 14:58:53,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (1/1) ... [2024-10-24 14:58:53,470 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (1/1) ... [2024-10-24 14:58:53,478 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (1/1) ... [2024-10-24 14:58:53,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (1/1) ... [2024-10-24 14:58:53,494 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (1/1) ... [2024-10-24 14:58:53,509 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 14:58:53,510 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 14:58:53,510 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 14:58:53,510 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 14:58:53,511 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (1/1) ... [2024-10-24 14:58:53,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 14:58:53,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 14:58:53,538 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) [2024-10-24 14:58:53,540 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 [2024-10-24 14:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 14:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 14:58:53,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 14:58:53,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 14:58:53,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 14:58:53,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 14:58:53,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2024-10-24 14:58:53,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2024-10-24 14:58:53,579 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2024-10-24 14:58:53,579 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2024-10-24 14:58:53,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 14:58:53,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 14:58:53,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-24 14:58:53,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-24 14:58:53,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-24 14:58:53,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-24 14:58:53,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 14:58:53,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 14:58:53,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 14:58:53,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 14:58:53,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 14:58:53,771 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 14:58:53,773 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 14:58:55,269 INFO L? ?]: Removed 414 outVars from TransFormulas that were not future-live. [2024-10-24 14:58:55,269 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 14:58:55,306 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 14:58:55,306 INFO L314 CfgBuilder]: Removed 69 assume(true) statements. [2024-10-24 14:58:55,306 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:58:55 BoogieIcfgContainer [2024-10-24 14:58:55,306 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 14:58:55,308 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 14:58:55,308 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 14:58:55,311 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 14:58:55,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:58:52" (1/3) ... [2024-10-24 14:58:55,312 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9dd33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:58:55, skipping insertion in model container [2024-10-24 14:58:55,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:58:53" (2/3) ... [2024-10-24 14:58:55,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9dd33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:58:55, skipping insertion in model container [2024-10-24 14:58:55,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:58:55" (3/3) ... [2024-10-24 14:58:55,314 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test4-2.i [2024-10-24 14:58:55,327 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 14:58:55,328 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 14:58:55,392 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 14:58:55,397 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;@565384c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 14:58:55,398 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 14:58:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 453 states, 433 states have (on average 1.628175519630485) internal successors, (705), 444 states have internal predecessors, (705), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-24 14:58:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-24 14:58:55,409 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 14:58:55,410 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 14:58:55,410 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 14:58:55,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 14:58:55,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1169299610, now seen corresponding path program 1 times [2024-10-24 14:58:55,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 14:58:55,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541869868] [2024-10-24 14:58:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 14:58:55,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 14:58:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 14:58:55,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 14:58:55,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541869868] [2024-10-24 14:58:55,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541869868] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 14:58:55,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 14:58:55,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 14:58:55,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274604204] [2024-10-24 14:58:55,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 14:58:55,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 14:58:55,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 14:58:55,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 14:58:55,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 14:58:55,631 INFO L87 Difference]: Start difference. First operand has 453 states, 433 states have (on average 1.628175519630485) internal successors, (705), 444 states have internal predecessors, (705), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 14:58:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 14:58:55,792 INFO L93 Difference]: Finished difference Result 1289 states and 2108 transitions. [2024-10-24 14:58:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 14:58:55,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-24 14:58:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 14:58:55,811 INFO L225 Difference]: With dead ends: 1289 [2024-10-24 14:58:55,811 INFO L226 Difference]: Without dead ends: 801 [2024-10-24 14:58:55,816 INFO L431 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 [2024-10-24 14:58:55,819 INFO L432 NwaCegarLoop]: 652 mSDtfsCounter, 545 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 14:58:55,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1303 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 14:58:55,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2024-10-24 14:58:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 418. [2024-10-24 14:58:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 399 states have (on average 1.4536340852130325) internal successors, (580), 409 states have internal predecessors, (580), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-24 14:58:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 612 transitions. [2024-10-24 14:58:55,895 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 612 transitions. Word has length 9 [2024-10-24 14:58:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 14:58:55,896 INFO L471 AbstractCegarLoop]: Abstraction has 418 states and 612 transitions. [2024-10-24 14:58:55,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 14:58:55,897 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 612 transitions. [2024-10-24 14:58:55,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-10-24 14:58:55,905 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 14:58:55,905 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 14:58:55,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 14:58:55,905 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 14:58:55,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 14:58:55,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1088434099, now seen corresponding path program 1 times [2024-10-24 14:58:55,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 14:58:55,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672556513] [2024-10-24 14:58:55,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 14:58:55,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 14:58:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 14:58:56,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 14:58:56,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672556513] [2024-10-24 14:58:56,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672556513] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 14:58:56,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 14:58:56,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 14:58:56,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988714420] [2024-10-24 14:58:56,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 14:58:56,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 14:58:56,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 14:58:56,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 14:58:56,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 14:58:56,451 INFO L87 Difference]: Start difference. First operand 418 states and 612 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 14:58:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 14:58:56,556 INFO L93 Difference]: Finished difference Result 837 states and 1225 transitions. [2024-10-24 14:58:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 14:58:56,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2024-10-24 14:58:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 14:58:56,559 INFO L225 Difference]: With dead ends: 837 [2024-10-24 14:58:56,559 INFO L226 Difference]: Without dead ends: 421 [2024-10-24 14:58:56,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 14:58:56,564 INFO L432 NwaCegarLoop]: 580 mSDtfsCounter, 105 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 14:58:56,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 1649 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 14:58:56,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-10-24 14:58:56,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 418. [2024-10-24 14:58:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 399 states have (on average 1.4360902255639099) internal successors, (573), 409 states have internal predecessors, (573), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-24 14:58:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 605 transitions. [2024-10-24 14:58:56,593 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 605 transitions. Word has length 155 [2024-10-24 14:58:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 14:58:56,594 INFO L471 AbstractCegarLoop]: Abstraction has 418 states and 605 transitions. [2024-10-24 14:58:56,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 14:58:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 605 transitions. [2024-10-24 14:58:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-10-24 14:58:56,601 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 14:58:56,601 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 14:58:56,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 14:58:56,602 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 14:58:56,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 14:58:56,603 INFO L85 PathProgramCache]: Analyzing trace with hash 515367207, now seen corresponding path program 1 times [2024-10-24 14:58:56,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 14:58:56,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166858339] [2024-10-24 14:58:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 14:58:56,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 14:58:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 14:58:56,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 14:58:56,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166858339] [2024-10-24 14:58:56,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166858339] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 14:58:56,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 14:58:56,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 14:58:56,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624362656] [2024-10-24 14:58:56,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 14:58:56,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 14:58:56,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 14:58:56,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 14:58:56,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 14:58:56,868 INFO L87 Difference]: Start difference. First operand 418 states and 605 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 14:58:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 14:58:56,937 INFO L93 Difference]: Finished difference Result 963 states and 1397 transitions. [2024-10-24 14:58:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 14:58:56,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2024-10-24 14:58:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 14:58:56,945 INFO L225 Difference]: With dead ends: 963 [2024-10-24 14:58:56,945 INFO L226 Difference]: Without dead ends: 547 [2024-10-24 14:58:56,947 INFO L431 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 [2024-10-24 14:58:56,950 INFO L432 NwaCegarLoop]: 600 mSDtfsCounter, 134 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 14:58:56,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1194 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 14:58:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2024-10-24 14:58:56,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2024-10-24 14:58:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 528 states have (on average 1.441287878787879) internal successors, (761), 538 states have internal predecessors, (761), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-24 14:58:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 793 transitions. [2024-10-24 14:58:56,970 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 793 transitions. Word has length 155 [2024-10-24 14:58:56,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 14:58:56,972 INFO L471 AbstractCegarLoop]: Abstraction has 547 states and 793 transitions. [2024-10-24 14:58:56,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 14:58:56,973 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 793 transitions. [2024-10-24 14:58:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-10-24 14:58:56,976 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 14:58:56,976 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 14:58:56,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 14:58:56,977 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 14:58:56,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 14:58:56,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1473786696, now seen corresponding path program 1 times [2024-10-24 14:58:56,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 14:58:56,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601557255] [2024-10-24 14:58:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 14:58:56,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 14:58:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:57,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-24 14:58:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:57,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 14:58:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 14:58:57,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 14:58:57,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601557255] [2024-10-24 14:58:57,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601557255] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 14:58:57,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 14:58:57,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 14:58:57,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907204035] [2024-10-24 14:58:57,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 14:58:57,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 14:58:57,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 14:58:57,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 14:58:57,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 14:58:57,293 INFO L87 Difference]: Start difference. First operand 547 states and 793 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 14:58:57,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 14:58:57,692 INFO L93 Difference]: Finished difference Result 923 states and 1338 transitions. [2024-10-24 14:58:57,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 14:58:57,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 168 [2024-10-24 14:58:57,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 14:58:57,695 INFO L225 Difference]: With dead ends: 923 [2024-10-24 14:58:57,695 INFO L226 Difference]: Without dead ends: 507 [2024-10-24 14:58:57,696 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 14:58:57,697 INFO L432 NwaCegarLoop]: 490 mSDtfsCounter, 43 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 14:58:57,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1818 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 14:58:57,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2024-10-24 14:58:57,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 505. [2024-10-24 14:58:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 486 states have (on average 1.4074074074074074) internal successors, (684), 496 states have internal predecessors, (684), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-24 14:58:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 716 transitions. [2024-10-24 14:58:57,714 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 716 transitions. Word has length 168 [2024-10-24 14:58:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 14:58:57,716 INFO L471 AbstractCegarLoop]: Abstraction has 505 states and 716 transitions. [2024-10-24 14:58:57,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 14:58:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 716 transitions. [2024-10-24 14:58:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-10-24 14:58:57,717 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 14:58:57,718 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 14:58:57,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 14:58:57,718 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 14:58:57,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 14:58:57,720 INFO L85 PathProgramCache]: Analyzing trace with hash -274455972, now seen corresponding path program 1 times [2024-10-24 14:58:57,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 14:58:57,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60638353] [2024-10-24 14:58:57,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 14:58:57,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 14:58:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:57,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-24 14:58:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:57,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 14:58:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 14:58:57,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 14:58:57,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60638353] [2024-10-24 14:58:57,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60638353] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 14:58:57,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 14:58:57,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 14:58:57,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368551928] [2024-10-24 14:58:57,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 14:58:57,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 14:58:57,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 14:58:57,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 14:58:57,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 14:58:57,936 INFO L87 Difference]: Start difference. First operand 505 states and 716 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 14:58:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 14:58:58,800 INFO L93 Difference]: Finished difference Result 875 states and 1244 transitions. [2024-10-24 14:58:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 14:58:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 168 [2024-10-24 14:58:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 14:58:58,803 INFO L225 Difference]: With dead ends: 875 [2024-10-24 14:58:58,803 INFO L226 Difference]: Without dead ends: 501 [2024-10-24 14:58:58,804 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 14:58:58,805 INFO L432 NwaCegarLoop]: 492 mSDtfsCounter, 16 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-24 14:58:58,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1825 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-24 14:58:58,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2024-10-24 14:58:58,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 499. [2024-10-24 14:58:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 480 states have (on average 1.4041666666666666) internal successors, (674), 490 states have internal predecessors, (674), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 16 states have call successors, (16) [2024-10-24 14:58:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 706 transitions. [2024-10-24 14:58:58,824 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 706 transitions. Word has length 168 [2024-10-24 14:58:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 14:58:58,824 INFO L471 AbstractCegarLoop]: Abstraction has 499 states and 706 transitions. [2024-10-24 14:58:58,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 4 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 14:58:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 706 transitions. [2024-10-24 14:58:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-10-24 14:58:58,827 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 14:58:58,827 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 14:58:58,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 14:58:58,828 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 14:58:58,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 14:58:58,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1149465772, now seen corresponding path program 1 times [2024-10-24 14:58:58,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 14:58:58,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188416803] [2024-10-24 14:58:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 14:58:58,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 14:58:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:59,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-24 14:58:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:59,104 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 14:58:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 14:58:59,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 14:58:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188416803] [2024-10-24 14:58:59,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188416803] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 14:58:59,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 14:58:59,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 14:58:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355222138] [2024-10-24 14:58:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 14:58:59,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 14:58:59,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 14:58:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 14:58:59,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 14:58:59,113 INFO L87 Difference]: Start difference. First operand 499 states and 706 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 14:58:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 14:58:59,500 INFO L93 Difference]: Finished difference Result 1009 states and 1421 transitions. [2024-10-24 14:58:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 14:58:59,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 168 [2024-10-24 14:58:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 14:58:59,505 INFO L225 Difference]: With dead ends: 1009 [2024-10-24 14:58:59,506 INFO L226 Difference]: Without dead ends: 641 [2024-10-24 14:58:59,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 14:58:59,509 INFO L432 NwaCegarLoop]: 507 mSDtfsCounter, 246 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 14:58:59,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1395 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 14:58:59,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2024-10-24 14:58:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 639. [2024-10-24 14:58:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 617 states have (on average 1.385737439222042) internal successors, (855), 627 states have internal predecessors, (855), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 10 states have call predecessors, (19), 19 states have call successors, (19) [2024-10-24 14:58:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 893 transitions. [2024-10-24 14:58:59,529 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 893 transitions. Word has length 168 [2024-10-24 14:58:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 14:58:59,529 INFO L471 AbstractCegarLoop]: Abstraction has 639 states and 893 transitions. [2024-10-24 14:58:59,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 3 states have internal predecessors, (161), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 14:58:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 893 transitions. [2024-10-24 14:58:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-10-24 14:58:59,532 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 14:58:59,532 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 14:58:59,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 14:58:59,532 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 14:58:59,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 14:58:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1265308433, now seen corresponding path program 1 times [2024-10-24 14:58:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 14:58:59,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34597988] [2024-10-24 14:58:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 14:58:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 14:58:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:59,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-24 14:58:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:59,834 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 14:58:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:59,838 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2024-10-24 14:58:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:59,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2024-10-24 14:58:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:58:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-24 14:58:59,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 14:58:59,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34597988] [2024-10-24 14:58:59,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34597988] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 14:58:59,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31785192] [2024-10-24 14:58:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 14:58:59,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 14:58:59,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 14:58:59,855 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) [2024-10-24 14:58:59,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 14:59:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:59:00,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 14:59:00,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 14:59:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-24 14:59:00,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 14:59:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-24 14:59:00,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31785192] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 14:59:00,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 14:59:00,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2024-10-24 14:59:00,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469313055] [2024-10-24 14:59:00,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 14:59:00,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 14:59:00,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 14:59:00,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 14:59:00,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-24 14:59:00,708 INFO L87 Difference]: Start difference. First operand 639 states and 893 transitions. Second operand has 8 states, 8 states have (on average 60.25) internal successors, (482), 7 states have internal predecessors, (482), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-24 14:59:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 14:59:01,158 INFO L93 Difference]: Finished difference Result 1405 states and 1981 transitions. [2024-10-24 14:59:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 14:59:01,159 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 60.25) internal successors, (482), 7 states have internal predecessors, (482), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 181 [2024-10-24 14:59:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 14:59:01,164 INFO L225 Difference]: With dead ends: 1405 [2024-10-24 14:59:01,164 INFO L226 Difference]: Without dead ends: 1376 [2024-10-24 14:59:01,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-24 14:59:01,165 INFO L432 NwaCegarLoop]: 548 mSDtfsCounter, 2619 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2651 SdHoareTripleChecker+Valid, 2394 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 14:59:01,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2651 Valid, 2394 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 14:59:01,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2024-10-24 14:59:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1374. [2024-10-24 14:59:01,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1337 states have (on average 1.3732236350037397) internal successors, (1836), 1347 states have internal predecessors, (1836), 34 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2024-10-24 14:59:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 1904 transitions. [2024-10-24 14:59:01,195 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 1904 transitions. Word has length 181 [2024-10-24 14:59:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 14:59:01,196 INFO L471 AbstractCegarLoop]: Abstraction has 1374 states and 1904 transitions. [2024-10-24 14:59:01,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 60.25) internal successors, (482), 7 states have internal predecessors, (482), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-24 14:59:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 1904 transitions. [2024-10-24 14:59:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2024-10-24 14:59:01,204 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 14:59:01,205 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 14:59:01,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 14:59:01,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 14:59:01,406 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 14:59:01,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 14:59:01,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1528064220, now seen corresponding path program 1 times [2024-10-24 14:59:01,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 14:59:01,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276918248] [2024-10-24 14:59:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 14:59:01,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 14:59:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:59:02,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-24 14:59:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:59:02,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-24 14:59:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:59:02,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2024-10-24 14:59:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:59:02,856 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2024-10-24 14:59:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:59:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 868 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-24 14:59:02,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 14:59:02,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276918248] [2024-10-24 14:59:02,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276918248] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 14:59:02,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073395660] [2024-10-24 14:59:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 14:59:02,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 14:59:02,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 14:59:02,864 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) [2024-10-24 14:59:02,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 14:59:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 14:59:03,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 3112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 14:59:03,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 14:59:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 868 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-24 14:59:04,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 14:59:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 868 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-24 14:59:04,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073395660] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 14:59:04,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 14:59:04,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-10-24 14:59:04,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84392595] [2024-10-24 14:59:04,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 14:59:04,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 14:59:04,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 14:59:04,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 14:59:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2024-10-24 14:59:04,959 INFO L87 Difference]: Start difference. First operand 1374 states and 1904 transitions. Second operand has 14 states, 14 states have (on average 97.0) internal successors, (1358), 13 states have internal predecessors, (1358), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-24 14:59:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 14:59:05,707 INFO L93 Difference]: Finished difference Result 3421 states and 4804 transitions. [2024-10-24 14:59:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 14:59:05,712 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 97.0) internal successors, (1358), 13 states have internal predecessors, (1358), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 619 [2024-10-24 14:59:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 14:59:05,724 INFO L225 Difference]: With dead ends: 3421 [2024-10-24 14:59:05,725 INFO L226 Difference]: Without dead ends: 3392 [2024-10-24 14:59:05,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1250 GetRequests, 1238 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2024-10-24 14:59:05,727 INFO L432 NwaCegarLoop]: 591 mSDtfsCounter, 6143 mSDsluCounter, 5018 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6247 SdHoareTripleChecker+Valid, 5609 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 14:59:05,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6247 Valid, 5609 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 14:59:05,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2024-10-24 14:59:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3390. [2024-10-24 14:59:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3390 states, 3317 states have (on average 1.371118480554718) internal successors, (4548), 3327 states have internal predecessors, (4548), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 61 states have call predecessors, (70), 70 states have call successors, (70) [2024-10-24 14:59:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3390 states to 3390 states and 4688 transitions. [2024-10-24 14:59:05,789 INFO L78 Accepts]: Start accepts. Automaton has 3390 states and 4688 transitions. Word has length 619 [2024-10-24 14:59:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 14:59:05,790 INFO L471 AbstractCegarLoop]: Abstraction has 3390 states and 4688 transitions. [2024-10-24 14:59:05,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 97.0) internal successors, (1358), 13 states have internal predecessors, (1358), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-24 14:59:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3390 states and 4688 transitions. [2024-10-24 14:59:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1496 [2024-10-24 14:59:05,842 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 14:59:05,843 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 14:59:05,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 14:59:06,043 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,SelfDestructingSolverStorable7 [2024-10-24 14:59:06,044 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 14:59:06,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 14:59:06,045 INFO L85 PathProgramCache]: Analyzing trace with hash -286613070, now seen corresponding path program 2 times [2024-10-24 14:59:06,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 14:59:06,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596963426] [2024-10-24 14:59:06,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 14:59:06,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms