./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/flag_loopdep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/flag_loopdep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU --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 ea0eb860624f2529729bf06b2cf9cdf66fc11dde388f7654e825b0ff58526d73 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:16:17,235 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:16:17,372 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:16:17,376 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:16:17,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:16:17,411 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:16:17,412 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:16:17,412 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:16:17,413 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:16:17,414 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:16:17,414 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:16:17,415 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:16:17,416 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:16:17,416 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:16:17,417 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:16:17,418 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:16:17,418 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:16:17,419 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:16:17,419 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:16:17,420 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:16:17,421 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:16:17,421 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:16:17,422 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:16:17,422 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:16:17,423 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:16:17,423 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:16:17,424 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:16:17,424 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:16:17,425 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:16:17,426 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:16:17,426 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:16:17,427 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:16:17,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:16:17,428 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:16:17,428 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:16:17,429 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:16:17,429 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:16:17,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:16:17,430 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:16:17,431 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:16:17,431 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:16:17,432 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:16:17,432 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea0eb860624f2529729bf06b2cf9cdf66fc11dde388f7654e825b0ff58526d73 [2024-10-31 22:16:17,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:16:17,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:16:17,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:16:17,848 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:16:17,849 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:16:17,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/array-lopstr16/flag_loopdep.i Unable to find full path for "g++" [2024-10-31 22:16:20,337 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:16:20,687 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:16:20,688 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/sv-benchmarks/c/array-lopstr16/flag_loopdep.i [2024-10-31 22:16:20,697 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/data/0fa6f804e/46e8ca62a8674869b71fcbb396627df0/FLAGecc1a861b [2024-10-31 22:16:20,982 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/data/0fa6f804e/46e8ca62a8674869b71fcbb396627df0 [2024-10-31 22:16:20,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:16:20,988 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:16:20,990 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:16:20,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:16:20,997 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:16:20,998 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:16:20" (1/1) ... [2024-10-31 22:16:21,000 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a5d6670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:20, skipping insertion in model container [2024-10-31 22:16:21,000 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:16:20" (1/1) ... [2024-10-31 22:16:21,031 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:16:21,238 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/sv-benchmarks/c/array-lopstr16/flag_loopdep.i[805,818] [2024-10-31 22:16:21,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:16:21,272 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:16:21,285 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/sv-benchmarks/c/array-lopstr16/flag_loopdep.i[805,818] [2024-10-31 22:16:21,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:16:21,316 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:16:21,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21 WrapperNode [2024-10-31 22:16:21,317 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:16:21,318 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:16:21,319 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:16:21,319 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:16:21,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (1/1) ... [2024-10-31 22:16:21,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (1/1) ... [2024-10-31 22:16:21,357 INFO L138 Inliner]: procedures = 21, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2024-10-31 22:16:21,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:16:21,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:16:21,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:16:21,359 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:16:21,373 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (1/1) ... [2024-10-31 22:16:21,373 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (1/1) ... [2024-10-31 22:16:21,375 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (1/1) ... [2024-10-31 22:16:21,389 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-31 22:16:21,390 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (1/1) ... [2024-10-31 22:16:21,390 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (1/1) ... [2024-10-31 22:16:21,402 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (1/1) ... [2024-10-31 22:16:21,410 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (1/1) ... [2024-10-31 22:16:21,416 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (1/1) ... [2024-10-31 22:16:21,417 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (1/1) ... [2024-10-31 22:16:21,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:16:21,422 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:16:21,422 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:16:21,422 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:16:21,423 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (1/1) ... [2024-10-31 22:16:21,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:16:21,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:21,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:16:21,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:16:21,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-31 22:16:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-31 22:16:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:16:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:16:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:16:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:16:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-31 22:16:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-31 22:16:21,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:16:21,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:16:21,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:16:21,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:16:21,653 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:16:21,656 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:16:21,895 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-10-31 22:16:21,896 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:16:21,919 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:16:21,920 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:16:21,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:16:21 BoogieIcfgContainer [2024-10-31 22:16:21,922 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:16:21,932 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:16:21,933 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:16:21,937 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:16:21,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:16:20" (1/3) ... [2024-10-31 22:16:21,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22de1e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:16:21, skipping insertion in model container [2024-10-31 22:16:21,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:21" (2/3) ... [2024-10-31 22:16:21,940 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22de1e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:16:21, skipping insertion in model container [2024-10-31 22:16:21,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:16:21" (3/3) ... [2024-10-31 22:16:21,942 INFO L112 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2024-10-31 22:16:21,966 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:16:21,966 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:16:22,026 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:16:22,032 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;@24ef0b0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:16:22,032 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:16:22,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-31 22:16:22,042 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:22,042 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:22,042 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:22,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:22,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2024-10-31 22:16:22,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:22,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707059644] [2024-10-31 22:16:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:22,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:22,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:22,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707059644] [2024-10-31 22:16:22,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707059644] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:22,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:22,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:16:22,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995719504] [2024-10-31 22:16:22,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:22,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:16:22,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:16:22,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:16:22,367 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:22,397 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2024-10-31 22:16:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:16:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-31 22:16:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:22,408 INFO L225 Difference]: With dead ends: 38 [2024-10-31 22:16:22,408 INFO L226 Difference]: Without dead ends: 18 [2024-10-31 22:16:22,411 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:16:22,414 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:22,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:16:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-31 22:16:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2024-10-31 22:16:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2024-10-31 22:16:22,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2024-10-31 22:16:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:22,448 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2024-10-31 22:16:22,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2024-10-31 22:16:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 22:16:22,449 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:22,449 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:22,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:16:22,450 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:22,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:22,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1264138591, now seen corresponding path program 1 times [2024-10-31 22:16:22,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:22,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739967401] [2024-10-31 22:16:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:22,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:16:22,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:22,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739967401] [2024-10-31 22:16:22,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739967401] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:22,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:22,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:16:22,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608989422] [2024-10-31 22:16:22,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:22,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:16:22,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:22,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:16:22,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:16:22,552 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:22,592 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2024-10-31 22:16:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:16:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-31 22:16:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:22,594 INFO L225 Difference]: With dead ends: 35 [2024-10-31 22:16:22,594 INFO L226 Difference]: Without dead ends: 27 [2024-10-31 22:16:22,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:16:22,596 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:22,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:16:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-31 22:16:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2024-10-31 22:16:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-10-31 22:16:22,603 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2024-10-31 22:16:22,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:22,604 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-10-31 22:16:22,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-10-31 22:16:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-31 22:16:22,605 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:22,605 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:22,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:16:22,605 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:22,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:22,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2024-10-31 22:16:22,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:22,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648924235] [2024-10-31 22:16:22,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:22,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:16:22,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:22,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648924235] [2024-10-31 22:16:22,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648924235] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:22,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216242087] [2024-10-31 22:16:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:22,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:22,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:22,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:22,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:16:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:22,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 22:16:22,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:16:22,910 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:16:22,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216242087] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:22,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:16:22,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 22:16:22,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128484361] [2024-10-31 22:16:22,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:22,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:16:22,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:22,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:16:22,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:16:22,916 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:22,938 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2024-10-31 22:16:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:16:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-31 22:16:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:22,942 INFO L225 Difference]: With dead ends: 32 [2024-10-31 22:16:22,942 INFO L226 Difference]: Without dead ends: 18 [2024-10-31 22:16:22,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:16:22,944 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:22,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:16:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-31 22:16:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-31 22:16:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-10-31 22:16:22,957 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2024-10-31 22:16:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:22,958 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-10-31 22:16:22,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-10-31 22:16:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-31 22:16:22,959 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:22,959 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:22,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:16:23,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:23,160 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:23,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:23,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2027280351, now seen corresponding path program 1 times [2024-10-31 22:16:23,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:23,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100572703] [2024-10-31 22:16:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:23,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:16:23,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:23,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100572703] [2024-10-31 22:16:23,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100572703] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:23,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939225210] [2024-10-31 22:16:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:23,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:23,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:23,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:23,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:16:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:23,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:16:23,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:16:23,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:16:23,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939225210] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:23,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:23,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-31 22:16:23,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145031460] [2024-10-31 22:16:23,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:23,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:16:23,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:23,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:16:23,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:16:23,550 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:23,659 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2024-10-31 22:16:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:16:23,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-31 22:16:23,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:23,660 INFO L225 Difference]: With dead ends: 56 [2024-10-31 22:16:23,660 INFO L226 Difference]: Without dead ends: 43 [2024-10-31 22:16:23,661 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:16:23,662 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:23,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 53 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:16:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-31 22:16:23,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2024-10-31 22:16:23,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-10-31 22:16:23,668 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2024-10-31 22:16:23,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:23,669 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-10-31 22:16:23,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-10-31 22:16:23,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 22:16:23,670 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:23,670 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:23,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:16:23,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:23,875 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:23,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2044266853, now seen corresponding path program 2 times [2024-10-31 22:16:23,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:23,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321284197] [2024-10-31 22:16:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:16:24,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:24,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321284197] [2024-10-31 22:16:24,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321284197] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:24,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559286765] [2024-10-31 22:16:24,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:16:24,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:24,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:24,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:24,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:16:24,312 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:16:24,313 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:24,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:16:24,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:16:24,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:16:24,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559286765] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:24,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:24,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-10-31 22:16:24,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139252721] [2024-10-31 22:16:24,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:24,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:16:24,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:24,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:16:24,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:16:24,624 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:24,705 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-10-31 22:16:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:16:24,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-31 22:16:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:24,708 INFO L225 Difference]: With dead ends: 55 [2024-10-31 22:16:24,708 INFO L226 Difference]: Without dead ends: 39 [2024-10-31 22:16:24,709 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:16:24,709 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:24,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 45 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:16:24,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-31 22:16:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-10-31 22:16:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2024-10-31 22:16:24,721 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2024-10-31 22:16:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:24,721 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2024-10-31 22:16:24,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2024-10-31 22:16:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-31 22:16:24,726 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:24,726 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:24,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:16:24,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:24,927 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:24,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2120045553, now seen corresponding path program 3 times [2024-10-31 22:16:24,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:24,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404369839] [2024-10-31 22:16:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:24,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:16:25,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:25,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404369839] [2024-10-31 22:16:25,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404369839] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:25,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769728718] [2024-10-31 22:16:25,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:16:25,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:25,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:25,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:25,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:16:25,763 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:16:25,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:25,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 22:16:25,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-31 22:16:25,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-31 22:16:25,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769728718] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:25,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:25,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2024-10-31 22:16:25,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092077511] [2024-10-31 22:16:25,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:25,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:16:25,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:16:25,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:16:25,943 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:26,168 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2024-10-31 22:16:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 22:16:26,169 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-31 22:16:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:26,170 INFO L225 Difference]: With dead ends: 106 [2024-10-31 22:16:26,170 INFO L226 Difference]: Without dead ends: 90 [2024-10-31 22:16:26,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:16:26,172 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:26,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 95 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:16:26,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-31 22:16:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 53. [2024-10-31 22:16:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2024-10-31 22:16:26,183 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 36 [2024-10-31 22:16:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:26,184 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2024-10-31 22:16:26,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2024-10-31 22:16:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-31 22:16:26,185 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:26,186 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:26,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:16:26,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:16:26,387 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:26,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1925935603, now seen corresponding path program 4 times [2024-10-31 22:16:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:26,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263244881] [2024-10-31 22:16:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-10-31 22:16:26,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:26,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263244881] [2024-10-31 22:16:26,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263244881] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:26,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977312725] [2024-10-31 22:16:26,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:16:26,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:26,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:26,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:26,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:16:27,288 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:16:27,288 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:27,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:16:27,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-10-31 22:16:27,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-10-31 22:16:27,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977312725] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:27,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:27,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-10-31 22:16:27,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491867181] [2024-10-31 22:16:27,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:27,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:16:27,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:16:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:16:27,557 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:27,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:27,782 INFO L93 Difference]: Finished difference Result 177 states and 202 transitions. [2024-10-31 22:16:27,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 22:16:27,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-10-31 22:16:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:27,786 INFO L225 Difference]: With dead ends: 177 [2024-10-31 22:16:27,787 INFO L226 Difference]: Without dead ends: 169 [2024-10-31 22:16:27,787 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:16:27,788 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 179 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:27,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 118 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:16:27,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-10-31 22:16:27,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 77. [2024-10-31 22:16:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2024-10-31 22:16:27,810 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 50 [2024-10-31 22:16:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:27,811 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2024-10-31 22:16:27,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:27,813 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2024-10-31 22:16:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-31 22:16:27,818 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:27,818 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:27,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:16:28,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:28,019 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:28,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2026747379, now seen corresponding path program 5 times [2024-10-31 22:16:28,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:28,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852057231] [2024-10-31 22:16:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:28,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-10-31 22:16:28,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:28,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852057231] [2024-10-31 22:16:28,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852057231] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:28,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819296468] [2024-10-31 22:16:28,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:16:28,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:28,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:28,626 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:28,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:16:32,933 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-10-31 22:16:32,933 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:32,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:16:32,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-10-31 22:16:33,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-10-31 22:16:33,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819296468] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:33,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:33,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-10-31 22:16:33,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798957211] [2024-10-31 22:16:33,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:33,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-31 22:16:33,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:33,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-31 22:16:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-31 22:16:33,655 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:34,112 INFO L93 Difference]: Finished difference Result 337 states and 386 transitions. [2024-10-31 22:16:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-31 22:16:34,113 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-10-31 22:16:34,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:34,115 INFO L225 Difference]: With dead ends: 337 [2024-10-31 22:16:34,115 INFO L226 Difference]: Without dead ends: 329 [2024-10-31 22:16:34,116 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-31 22:16:34,117 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 536 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:34,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 226 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:16:34,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2024-10-31 22:16:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 125. [2024-10-31 22:16:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2024-10-31 22:16:34,146 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 74 [2024-10-31 22:16:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:34,146 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2024-10-31 22:16:34,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2024-10-31 22:16:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-10-31 22:16:34,153 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:34,153 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:34,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:16:34,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 22:16:34,354 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:34,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:34,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1272037901, now seen corresponding path program 6 times [2024-10-31 22:16:34,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:34,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341204599] [2024-10-31 22:16:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:34,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2024-10-31 22:16:35,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:35,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341204599] [2024-10-31 22:16:35,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341204599] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:35,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340426481] [2024-10-31 22:16:35,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:16:35,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:35,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:35,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:35,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:16:35,349 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-31 22:16:35,349 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:35,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-31 22:16:35,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1397 trivial. 0 not checked. [2024-10-31 22:16:36,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:36,937 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-31 22:16:36,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 19 [2024-10-31 22:16:36,949 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-31 22:16:36,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2024-10-31 22:16:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 1397 trivial. 0 not checked. [2024-10-31 22:16:36,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340426481] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:36,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:36,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 25 [2024-10-31 22:16:36,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256897992] [2024-10-31 22:16:36,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:36,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 22:16:36,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 22:16:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:16:36,977 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:37,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:37,408 INFO L93 Difference]: Finished difference Result 233 states and 241 transitions. [2024-10-31 22:16:37,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-31 22:16:37,408 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2024-10-31 22:16:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:37,409 INFO L225 Difference]: With dead ends: 233 [2024-10-31 22:16:37,409 INFO L226 Difference]: Without dead ends: 133 [2024-10-31 22:16:37,411 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=1154, Unknown=0, NotChecked=0, Total=1482 [2024-10-31 22:16:37,413 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:37,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 76 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:16:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-31 22:16:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2024-10-31 22:16:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 129 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2024-10-31 22:16:37,445 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 122 [2024-10-31 22:16:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:37,446 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2024-10-31 22:16:37,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:37,446 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2024-10-31 22:16:37,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-10-31 22:16:37,448 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:37,448 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:37,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:16:37,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:37,650 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:37,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:37,650 INFO L85 PathProgramCache]: Analyzing trace with hash 263851330, now seen corresponding path program 1 times [2024-10-31 22:16:37,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:37,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673550731] [2024-10-31 22:16:37,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:37,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2024-10-31 22:16:37,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:37,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673550731] [2024-10-31 22:16:37,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673550731] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:37,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:37,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:16:37,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764606608] [2024-10-31 22:16:37,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:37,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:16:37,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:37,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:16:37,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:16:37,860 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:37,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:37,869 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2024-10-31 22:16:37,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:16:37,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2024-10-31 22:16:37,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:37,870 INFO L225 Difference]: With dead ends: 137 [2024-10-31 22:16:37,870 INFO L226 Difference]: Without dead ends: 130 [2024-10-31 22:16:37,871 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:16:37,871 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:37,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:16:37,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-31 22:16:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-10-31 22:16:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2024-10-31 22:16:37,896 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 127 [2024-10-31 22:16:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:37,897 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2024-10-31 22:16:37,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2024-10-31 22:16:37,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-10-31 22:16:37,904 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:37,904 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:37,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:16:37,904 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:37,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:37,905 INFO L85 PathProgramCache]: Analyzing trace with hash 74041612, now seen corresponding path program 1 times [2024-10-31 22:16:37,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:37,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336060290] [2024-10-31 22:16:37,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:37,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2024-10-31 22:16:38,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:38,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336060290] [2024-10-31 22:16:38,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336060290] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:38,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945911182] [2024-10-31 22:16:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:38,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:38,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:38,631 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:38,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:16:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:38,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:16:38,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2024-10-31 22:16:39,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2024-10-31 22:16:40,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945911182] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:40,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:40,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 41 [2024-10-31 22:16:40,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765840092] [2024-10-31 22:16:40,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:40,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-31 22:16:40,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:40,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-31 22:16:40,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2024-10-31 22:16:40,145 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:40,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:40,295 INFO L93 Difference]: Finished difference Result 261 states and 278 transitions. [2024-10-31 22:16:40,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-31 22:16:40,296 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2024-10-31 22:16:40,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:40,297 INFO L225 Difference]: With dead ends: 261 [2024-10-31 22:16:40,298 INFO L226 Difference]: Without dead ends: 158 [2024-10-31 22:16:40,299 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=742, Invalid=898, Unknown=0, NotChecked=0, Total=1640 [2024-10-31 22:16:40,299 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:40,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 42 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:16:40,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-10-31 22:16:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2024-10-31 22:16:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.019108280254777) internal successors, (160), 157 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2024-10-31 22:16:40,332 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 129 [2024-10-31 22:16:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:40,332 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2024-10-31 22:16:40,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2024-10-31 22:16:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-10-31 22:16:40,335 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:40,336 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 26, 26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:40,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-31 22:16:40,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:40,537 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:40,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:40,539 INFO L85 PathProgramCache]: Analyzing trace with hash 68979696, now seen corresponding path program 2 times [2024-10-31 22:16:40,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:40,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027621177] [2024-10-31 22:16:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:40,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 679 trivial. 0 not checked. [2024-10-31 22:16:42,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:42,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027621177] [2024-10-31 22:16:42,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027621177] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:16:42,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841326580] [2024-10-31 22:16:42,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:16:42,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:42,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:42,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:16:42,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:16:43,070 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:16:43,071 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:16:43,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-31 22:16:43,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:16:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2024-10-31 22:16:44,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:16:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2014 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2024-10-31 22:16:46,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841326580] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:16:46,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:16:46,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29, 29] total 87 [2024-10-31 22:16:46,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653525461] [2024-10-31 22:16:46,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:16:46,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-10-31 22:16:46,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:46,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-10-31 22:16:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2067, Invalid=5415, Unknown=0, NotChecked=0, Total=7482 [2024-10-31 22:16:46,796 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 87 states, 87 states have (on average 2.5057471264367814) internal successors, (218), 87 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:16:47,414 INFO L93 Difference]: Finished difference Result 534 states and 566 transitions. [2024-10-31 22:16:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-10-31 22:16:47,415 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.5057471264367814) internal successors, (218), 87 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2024-10-31 22:16:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:16:47,417 INFO L225 Difference]: With dead ends: 534 [2024-10-31 22:16:47,417 INFO L226 Difference]: Without dead ends: 431 [2024-10-31 22:16:47,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2067, Invalid=5415, Unknown=0, NotChecked=0, Total=7482 [2024-10-31 22:16:47,420 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 464 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:16:47,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 198 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:16:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2024-10-31 22:16:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 217. [2024-10-31 22:16:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2024-10-31 22:16:47,435 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 157 [2024-10-31 22:16:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:16:47,436 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2024-10-31 22:16:47,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.5057471264367814) internal successors, (218), 87 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2024-10-31 22:16:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-10-31 22:16:47,439 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:16:47,439 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 31, 31, 31, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:47,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:16:47,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d01bc6-9c67-4dce-8bdd-f4de13514f3b/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:16:47,640 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:16:47,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:47,640 INFO L85 PathProgramCache]: Analyzing trace with hash -80728372, now seen corresponding path program 3 times [2024-10-31 22:16:47,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:47,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768861810] [2024-10-31 22:16:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:47,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat