./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC --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 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:17:31,925 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:17:32,050 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 23:17:32,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:17:32,058 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:17:32,099 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:17:32,100 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:17:32,101 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:17:32,101 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:17:32,102 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:17:32,103 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:17:32,103 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:17:32,103 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:17:32,103 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:17:32,104 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:17:32,104 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:17:32,105 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 23:17:32,105 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:17:32,105 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:17:32,105 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:17:32,106 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:17:32,106 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 23:17:32,106 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:17:32,106 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 23:17:32,106 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:17:32,106 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 23:17:32,106 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:17:32,107 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:17:32,107 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:17:32,107 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:17:32,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:17:32,107 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:17:32,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:17:32,107 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:17:32,107 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:17:32,108 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:17:32,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:17:32,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:17:32,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:17:32,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:17:32,108 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 23:17:32,108 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 23:17:32,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:17:32,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:17:32,108 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:17:32,109 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:17:32,109 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:17:32,109 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:17:32,110 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC 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 -> 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a [2024-11-23 23:17:32,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:17:32,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:17:32,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:17:32,504 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:17:32,504 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:17:32,505 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/loop-acceleration/array_3-2.i [2024-11-23 23:17:35,846 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/data/93fd69a8b/70af364a17b943c5b138c8ec6bd9aee3/FLAG38268f3d1 [2024-11-23 23:17:36,256 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:17:36,272 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/sv-benchmarks/c/loop-acceleration/array_3-2.i [2024-11-23 23:17:36,288 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/data/93fd69a8b/70af364a17b943c5b138c8ec6bd9aee3/FLAG38268f3d1 [2024-11-23 23:17:36,322 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/data/93fd69a8b/70af364a17b943c5b138c8ec6bd9aee3 [2024-11-23 23:17:36,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:17:36,329 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:17:36,331 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:17:36,333 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:17:36,339 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:17:36,340 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,341 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4902289f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36, skipping insertion in model container [2024-11-23 23:17:36,342 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,362 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:17:36,546 WARN L250 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_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/sv-benchmarks/c/loop-acceleration/array_3-2.i[809,822] [2024-11-23 23:17:36,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:17:36,574 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:17:36,591 WARN L250 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_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/sv-benchmarks/c/loop-acceleration/array_3-2.i[809,822] [2024-11-23 23:17:36,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:17:36,623 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:17:36,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36 WrapperNode [2024-11-23 23:17:36,624 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:17:36,625 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:17:36,625 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:17:36,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:17:36,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,647 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,672 INFO L138 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2024-11-23 23:17:36,672 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:17:36,673 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:17:36,674 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:17:36,674 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:17:36,686 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,688 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,711 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 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]. [2024-11-23 23:17:36,711 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,711 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,720 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,721 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,730 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,733 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:17:36,734 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:17:36,734 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:17:36,735 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:17:36,736 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (1/1) ... [2024-11-23 23:17:36,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:17:36,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:17:36,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:17:36,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:17:36,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:17:36,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:17:36,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:17:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-23 23:17:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:17:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:17:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:17:36,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:17:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:17:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:17:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-23 23:17:36,915 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:17:36,918 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:17:37,105 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-23 23:17:37,109 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:17:37,122 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:17:37,123 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-23 23:17:37,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:17:37 BoogieIcfgContainer [2024-11-23 23:17:37,124 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:17:37,128 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:17:37,128 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:17:37,135 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:17:37,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:17:36" (1/3) ... [2024-11-23 23:17:37,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140eb6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:17:37, skipping insertion in model container [2024-11-23 23:17:37,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:17:36" (2/3) ... [2024-11-23 23:17:37,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140eb6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:17:37, skipping insertion in model container [2024-11-23 23:17:37,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:17:37" (3/3) ... [2024-11-23 23:17:37,139 INFO L128 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2024-11-23 23:17:37,160 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:17:37,162 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array_3-2.i that has 1 procedures, 17 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-23 23:17:37,243 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:17:37,262 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;@6dd2cd88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:17:37,262 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-23 23:17:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:37,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-23 23:17:37,274 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:17:37,275 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:17:37,276 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:17:37,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:17:37,286 INFO L85 PathProgramCache]: Analyzing trace with hash 269700269, now seen corresponding path program 1 times [2024-11-23 23:17:37,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:17:37,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904321878] [2024-11-23 23:17:37,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:17:37,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:17:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:17:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:17:37,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:17:37,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904321878] [2024-11-23 23:17:37,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904321878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:17:37,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:17:37,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:17:37,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296392141] [2024-11-23 23:17:37,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:17:37,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:17:37,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:17:37,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:17:37,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:17:37,587 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:37,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:17:37,637 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2024-11-23 23:17:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:17:37,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2024-11-23 23:17:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:17:37,647 INFO L225 Difference]: With dead ends: 37 [2024-11-23 23:17:37,647 INFO L226 Difference]: Without dead ends: 20 [2024-11-23 23:17:37,650 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:17:37,654 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:17:37,654 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:17:37,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-23 23:17:37,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2024-11-23 23:17:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-23 23:17:37,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2024-11-23 23:17:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:17:37,689 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-23 23:17:37,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:37,689 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-23 23:17:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-23 23:17:37,689 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:17:37,690 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:17:37,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:17:37,690 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:17:37,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:17:37,697 INFO L85 PathProgramCache]: Analyzing trace with hash 779111992, now seen corresponding path program 1 times [2024-11-23 23:17:37,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:17:37,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77018964] [2024-11-23 23:17:37,697 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:17:37,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:17:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:17:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:17:37,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:17:37,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77018964] [2024-11-23 23:17:37,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77018964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:17:37,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185648733] [2024-11-23 23:17:37,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:17:37,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:17:37,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:17:37,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:17:37,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:17:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:17:37,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:17:37,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:17:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:17:38,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:17:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:17:38,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185648733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:17:38,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:17:38,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-23 23:17:38,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946956870] [2024-11-23 23:17:38,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:17:38,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:17:38,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:17:38,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:17:38,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:17:38,092 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:38,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:17:38,186 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2024-11-23 23:17:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:17:38,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 [2024-11-23 23:17:38,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:17:38,189 INFO L225 Difference]: With dead ends: 49 [2024-11-23 23:17:38,189 INFO L226 Difference]: Without dead ends: 40 [2024-11-23 23:17:38,190 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:17:38,191 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:17:38,191 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 27 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:17:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-23 23:17:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 20. [2024-11-23 23:17:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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) [2024-11-23 23:17:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-23 23:17:38,200 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2024-11-23 23:17:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:17:38,200 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-23 23:17:38,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-23 23:17:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-23 23:17:38,201 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:17:38,201 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:17:38,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 23:17:38,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-23 23:17:38,403 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:17:38,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:17:38,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1028788484, now seen corresponding path program 2 times [2024-11-23 23:17:38,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:17:38,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037307357] [2024-11-23 23:17:38,409 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:17:38,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:17:38,457 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 23:17:38,457 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:17:38,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:17:38,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037307357] [2024-11-23 23:17:38,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037307357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:17:38,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:17:38,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:17:38,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790721456] [2024-11-23 23:17:38,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:17:38,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:17:38,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:17:38,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:17:38,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:17:38,668 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:17:38,716 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-11-23 23:17:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:17:38,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-23 23:17:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:17:38,718 INFO L225 Difference]: With dead ends: 28 [2024-11-23 23:17:38,720 INFO L226 Difference]: Without dead ends: 24 [2024-11-23 23:17:38,720 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:17:38,721 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:17:38,723 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:17:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-23 23:17:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-11-23 23:17:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-11-23 23:17:38,734 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2024-11-23 23:17:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:17:38,735 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-11-23 23:17:38,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-11-23 23:17:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-23 23:17:38,737 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:17:38,738 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:17:38,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:17:38,738 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:17:38,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:17:38,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1839244459, now seen corresponding path program 1 times [2024-11-23 23:17:38,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:17:38,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508504360] [2024-11-23 23:17:38,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:17:38,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:17:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:17:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:17:38,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:17:38,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508504360] [2024-11-23 23:17:38,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508504360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:17:38,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561242836] [2024-11-23 23:17:38,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:17:38,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:17:38,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:17:38,982 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:17:38,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:17:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:17:39,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:17:39,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:17:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:17:39,168 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:17:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:17:39,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561242836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:17:39,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:17:39,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2024-11-23 23:17:39,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919812774] [2024-11-23 23:17:39,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:17:39,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:17:39,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:17:39,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:17:39,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:17:39,293 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:39,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:17:39,472 INFO L93 Difference]: Finished difference Result 94 states and 123 transitions. [2024-11-23 23:17:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-23 23:17:39,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-23 23:17:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:17:39,474 INFO L225 Difference]: With dead ends: 94 [2024-11-23 23:17:39,476 INFO L226 Difference]: Without dead ends: 77 [2024-11-23 23:17:39,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:17:39,477 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 83 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:17:39,479 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 56 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:17:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-23 23:17:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2024-11-23 23:17:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-11-23 23:17:39,493 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 22 [2024-11-23 23:17:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:17:39,494 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-11-23 23:17:39,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-11-23 23:17:39,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-23 23:17:39,495 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:17:39,495 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:17:39,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 23:17:39,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:17:39,696 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:17:39,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:17:39,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1570434783, now seen corresponding path program 2 times [2024-11-23 23:17:39,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:17:39,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105353108] [2024-11-23 23:17:39,696 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:17:39,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:17:39,732 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:17:39,732 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-23 23:17:40,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:17:40,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105353108] [2024-11-23 23:17:40,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105353108] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:17:40,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350262443] [2024-11-23 23:17:40,105 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:17:40,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:17:40,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:17:40,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:17:40,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:17:40,219 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:17:40,219 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:40,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 23:17:40,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:17:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-23 23:17:40,303 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:17:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-23 23:17:40,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350262443] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:17:40,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:17:40,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-23 23:17:40,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920044710] [2024-11-23 23:17:40,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:17:40,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 23:17:40,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:17:40,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 23:17:40,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:17:40,667 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:40,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:17:40,982 INFO L93 Difference]: Finished difference Result 189 states and 248 transitions. [2024-11-23 23:17:40,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-23 23:17:40,983 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 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 [2024-11-23 23:17:40,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:17:40,984 INFO L225 Difference]: With dead ends: 189 [2024-11-23 23:17:40,984 INFO L226 Difference]: Without dead ends: 161 [2024-11-23 23:17:40,985 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:17:40,986 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 242 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:17:40,986 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 93 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:17:40,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-23 23:17:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 75. [2024-11-23 23:17:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:40,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2024-11-23 23:17:40,996 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 50 [2024-11-23 23:17:40,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:17:40,996 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2024-11-23 23:17:40,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:40,997 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2024-11-23 23:17:40,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-23 23:17:40,998 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:17:40,998 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:17:41,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 23:17:41,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:17:41,202 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:17:41,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:17:41,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1031135247, now seen corresponding path program 3 times [2024-11-23 23:17:41,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:17:41,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170616587] [2024-11-23 23:17:41,203 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:17:41,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:17:41,264 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-23 23:17:41,264 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-23 23:17:41,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:17:41,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170616587] [2024-11-23 23:17:41,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170616587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:17:41,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726373489] [2024-11-23 23:17:41,538 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:17:41,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:17:41,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:17:41,540 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:17:41,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:17:41,666 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-23 23:17:41,666 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:41,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:17:41,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:17:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-23 23:17:41,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:17:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-23 23:17:41,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726373489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:17:41,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:17:41,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-23 23:17:41,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329758585] [2024-11-23 23:17:41,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:17:41,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-23 23:17:41,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:17:41,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-23 23:17:41,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2024-11-23 23:17:41,925 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:17:42,081 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2024-11-23 23:17:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:17:42,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 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 [2024-11-23 23:17:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:17:42,083 INFO L225 Difference]: With dead ends: 114 [2024-11-23 23:17:42,083 INFO L226 Difference]: Without dead ends: 104 [2024-11-23 23:17:42,083 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2024-11-23 23:17:42,084 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:17:42,084 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 65 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:17:42,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-23 23:17:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2024-11-23 23:17:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2024-11-23 23:17:42,097 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 74 [2024-11-23 23:17:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:17:42,097 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2024-11-23 23:17:42,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2024-11-23 23:17:42,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-23 23:17:42,099 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:17:42,100 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:17:42,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 23:17:42,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-23 23:17:42,300 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:17:42,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:17:42,301 INFO L85 PathProgramCache]: Analyzing trace with hash 827845024, now seen corresponding path program 4 times [2024-11-23 23:17:42,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:17:42,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698388290] [2024-11-23 23:17:42,301 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:17:42,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:17:42,348 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:17:42,348 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-23 23:17:42,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:17:42,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698388290] [2024-11-23 23:17:42,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698388290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:17:42,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017193656] [2024-11-23 23:17:42,966 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:17:42,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:17:42,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:17:42,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:17:42,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:17:43,127 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:17:43,127 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:43,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-23 23:17:43,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:17:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-23 23:17:43,527 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:17:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-23 23:17:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017193656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:17:44,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:17:44,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25, 25] total 51 [2024-11-23 23:17:44,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123727623] [2024-11-23 23:17:44,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:17:44,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-23 23:17:44,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:17:44,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-23 23:17:44,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2024-11-23 23:17:44,509 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 51 states, 51 states have (on average 3.1372549019607843) internal successors, (160), 51 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) [2024-11-23 23:17:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:17:45,356 INFO L93 Difference]: Finished difference Result 386 states and 508 transitions. [2024-11-23 23:17:45,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-23 23:17:45,356 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.1372549019607843) internal successors, (160), 51 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) Word has length 102 [2024-11-23 23:17:45,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:17:45,358 INFO L225 Difference]: With dead ends: 386 [2024-11-23 23:17:45,359 INFO L226 Difference]: Without dead ends: 317 [2024-11-23 23:17:45,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2024-11-23 23:17:45,361 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 578 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:17:45,362 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 157 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-23 23:17:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2024-11-23 23:17:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 201. [2024-11-23 23:17:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.135) internal successors, (227), 200 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:17:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 227 transitions. [2024-11-23 23:17:45,402 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 227 transitions. Word has length 102 [2024-11-23 23:17:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:17:45,403 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 227 transitions. [2024-11-23 23:17:45,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.1372549019607843) internal successors, (160), 51 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) [2024-11-23 23:17:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 227 transitions. [2024-11-23 23:17:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-11-23 23:17:45,413 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:17:45,413 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:17:45,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 23:17:45,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:17:45,614 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:17:45,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:17:45,615 INFO L85 PathProgramCache]: Analyzing trace with hash 590680856, now seen corresponding path program 5 times [2024-11-23 23:17:45,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:17:45,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952774964] [2024-11-23 23:17:45,615 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:17:45,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:17:46,201 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2024-11-23 23:17:46,201 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3385 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2024-11-23 23:17:49,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:17:49,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952774964] [2024-11-23 23:17:49,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952774964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:17:49,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288151244] [2024-11-23 23:17:49,749 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:17:49,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:17:49,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:17:49,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:17:49,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:17:54,495 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2024-11-23 23:17:54,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:17:54,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-23 23:17:54,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:17:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3385 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2024-11-23 23:17:54,773 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:17:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3385 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2024-11-23 23:17:58,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288151244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:17:58,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:17:58,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 98 [2024-11-23 23:17:58,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55245562] [2024-11-23 23:17:58,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:17:58,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-11-23 23:17:58,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:17:58,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-11-23 23:17:58,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2024-11-23 23:17:58,555 INFO L87 Difference]: Start difference. First operand 201 states and 227 transitions. Second operand has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 98 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:18:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:18:02,492 INFO L93 Difference]: Finished difference Result 764 states and 1008 transitions. [2024-11-23 23:18:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-23 23:18:02,492 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 98 states have internal predecessors, (202), 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 200 [2024-11-23 23:18:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:18:02,496 INFO L225 Difference]: With dead ends: 764 [2024-11-23 23:18:02,496 INFO L226 Difference]: Without dead ends: 660 [2024-11-23 23:18:02,499 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2024-11-23 23:18:02,500 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 1756 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:18:02,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 300 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-23 23:18:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2024-11-23 23:18:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 299. [2024-11-23 23:18:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0906040268456376) internal successors, (325), 298 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:18:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 325 transitions. [2024-11-23 23:18:02,538 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 325 transitions. Word has length 200 [2024-11-23 23:18:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:18:02,539 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 325 transitions. [2024-11-23 23:18:02,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 98 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:18:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 325 transitions. [2024-11-23 23:18:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2024-11-23 23:18:02,554 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:18:02,554 INFO L218 NwaCegarLoop]: trace histogram [96, 96, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:18:02,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 23:18:02,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:18:02,755 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:18:02,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:18:02,756 INFO L85 PathProgramCache]: Analyzing trace with hash -321670884, now seen corresponding path program 6 times [2024-11-23 23:18:02,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:18:02,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572416754] [2024-11-23 23:18:02,756 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:18:02,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:18:03,261 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2024-11-23 23:18:03,261 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:18:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10392 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 9216 trivial. 0 not checked. [2024-11-23 23:18:04,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:18:04,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572416754] [2024-11-23 23:18:04,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572416754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:18:04,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450573149] [2024-11-23 23:18:04,861 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:18:04,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:18:04,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:18:04,866 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:18:04,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:19:34,756 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2024-11-23 23:19:34,756 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:19:34,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-23 23:19:34,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:19:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10392 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 9216 trivial. 0 not checked. [2024-11-23 23:19:35,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:19:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10392 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 9216 trivial. 0 not checked. [2024-11-23 23:19:36,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450573149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:19:36,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:19:36,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2024-11-23 23:19:36,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38097659] [2024-11-23 23:19:36,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:19:36,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-23 23:19:36,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:19:36,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-23 23:19:36,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2024-11-23 23:19:36,409 INFO L87 Difference]: Start difference. First operand 299 states and 325 transitions. Second operand has 55 states, 55 states have (on average 3.9272727272727272) internal successors, (216), 55 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:19:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:19:37,213 INFO L93 Difference]: Finished difference Result 433 states and 510 transitions. [2024-11-23 23:19:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-23 23:19:37,213 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.9272727272727272) internal successors, (216), 55 states have internal predecessors, (216), 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 298 [2024-11-23 23:19:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:19:37,216 INFO L225 Difference]: With dead ends: 433 [2024-11-23 23:19:37,216 INFO L226 Difference]: Without dead ends: 404 [2024-11-23 23:19:37,217 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2024-11-23 23:19:37,218 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 436 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:19:37,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 164 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-23 23:19:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-23 23:19:37,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 403. [2024-11-23 23:19:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.1318407960199004) internal successors, (455), 402 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:19:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 455 transitions. [2024-11-23 23:19:37,236 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 455 transitions. Word has length 298 [2024-11-23 23:19:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:19:37,237 INFO L471 AbstractCegarLoop]: Abstraction has 403 states and 455 transitions. [2024-11-23 23:19:37,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.9272727272727272) internal successors, (216), 55 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:19:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 455 transitions. [2024-11-23 23:19:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2024-11-23 23:19:37,244 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:19:37,245 INFO L218 NwaCegarLoop]: trace histogram [96, 96, 51, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:19:37,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 23:19:37,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:19:37,445 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:19:37,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:19:37,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1960526190, now seen corresponding path program 7 times [2024-11-23 23:19:37,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:19:37,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46095387] [2024-11-23 23:19:37,447 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:19:37,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:19:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:19:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14266 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2024-11-23 23:19:47,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:19:47,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46095387] [2024-11-23 23:19:47,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46095387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:19:47,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942794814] [2024-11-23 23:19:47,900 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:19:47,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:19:47,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:19:47,903 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:19:47,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:19:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:19:48,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-23 23:19:48,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:19:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14266 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2024-11-23 23:19:48,835 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:20:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14266 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2024-11-23 23:20:01,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942794814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:20:01,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:20:01,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2024-11-23 23:20:01,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147416933] [2024-11-23 23:20:01,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:20:01,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2024-11-23 23:20:01,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:01,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2024-11-23 23:20:01,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2024-11-23 23:20:01,435 INFO L87 Difference]: Start difference. First operand 403 states and 455 transitions. Second operand has 197 states, 197 states have (on average 2.035532994923858) internal successors, (401), 197 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:20:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:31,368 INFO L93 Difference]: Finished difference Result 1528 states and 2017 transitions. [2024-11-23 23:20:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2024-11-23 23:20:31,369 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 2.035532994923858) internal successors, (401), 197 states have internal predecessors, (401), 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 402 [2024-11-23 23:20:31,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:31,375 INFO L225 Difference]: With dead ends: 1528 [2024-11-23 23:20:31,375 INFO L226 Difference]: Without dead ends: 1320 [2024-11-23 23:20:31,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 706 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2024-11-23 23:20:31,383 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 4287 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 923 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4287 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:20:31,384 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4287 Valid, 561 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [923 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-23 23:20:31,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2024-11-23 23:20:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 599. [2024-11-23 23:20:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.088628762541806) internal successors, (651), 598 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:20:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 651 transitions. [2024-11-23 23:20:31,414 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 651 transitions. Word has length 402 [2024-11-23 23:20:31,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:31,415 INFO L471 AbstractCegarLoop]: Abstraction has 599 states and 651 transitions. [2024-11-23 23:20:31,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 2.035532994923858) internal successors, (401), 197 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:20:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 651 transitions. [2024-11-23 23:20:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2024-11-23 23:20:31,429 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:31,429 INFO L218 NwaCegarLoop]: trace histogram [194, 194, 51, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:31,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 23:20:31,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-23 23:20:31,630 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:20:31,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1643016090, now seen corresponding path program 8 times [2024-11-23 23:20:31,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:31,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990138024] [2024-11-23 23:20:31,631 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:20:31,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:32,143 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:20:32,143 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42686 backedges. 0 proven. 37636 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2024-11-23 23:21:03,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:21:03,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990138024] [2024-11-23 23:21:03,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990138024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:21:03,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413401989] [2024-11-23 23:21:03,620 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:21:03,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:21:03,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:21:03,623 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:21:03,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf4644f-e974-4dc2-97f9-abb4ee1035b6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:21:04,446 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:21:04,446 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:21:04,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 2193 conjuncts, 196 conjuncts are in the unsatisfiable core [2024-11-23 23:21:04,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:21:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 42686 backedges. 0 proven. 37636 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2024-11-23 23:21:05,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:21:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42686 backedges. 0 proven. 37636 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2024-11-23 23:21:57,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413401989] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:21:57,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:21:57,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 197, 197] total 393 [2024-11-23 23:21:57,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517256176] [2024-11-23 23:21:57,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:21:57,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 393 states [2024-11-23 23:21:57,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:21:57,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 393 interpolants. [2024-11-23 23:21:57,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77028, Invalid=77028, Unknown=0, NotChecked=0, Total=154056 [2024-11-23 23:21:57,580 INFO L87 Difference]: Start difference. First operand 599 states and 651 transitions. Second operand has 393 states, 393 states have (on average 2.017811704834606) internal successors, (793), 393 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:32:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:32:25,816 INFO L93 Difference]: Finished difference Result 2900 states and 3879 transitions. [2024-11-23 23:32:25,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 392 states. [2024-11-23 23:32:25,817 INFO L78 Accepts]: Start accepts. Automaton has has 393 states, 393 states have (on average 2.017811704834606) internal successors, (793), 393 states have internal predecessors, (793), 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 598 [2024-11-23 23:32:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted.