./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/process_queue.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-data/process_queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd --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 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:27:00,361 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:27:00,447 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 15:27:00,453 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:27:00,453 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:27:00,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:27:00,479 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:27:00,480 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:27:00,480 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:27:00,480 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:27:00,480 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:27:00,480 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:27:00,481 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:27:00,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:27:00,481 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:27:00,481 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:27:00,481 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 15:27:00,481 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:27:00,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 15:27:00,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:27:00,482 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:27:00,482 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 15:27:00,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:27:00,482 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 15:27:00,482 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:27:00,482 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:27:00,482 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 15:27:00,482 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:27:00,483 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:27:00,483 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:27:00,483 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:27:00,483 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:27:00,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:27:00,484 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:27:00,484 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:27:00,484 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 15:27:00,484 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 15:27:00,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 15:27:00,485 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:27:00,485 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:27:00,485 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:27:00,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:27:00,485 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_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd 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 -> 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c [2024-11-13 15:27:00,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:27:00,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:27:00,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:27:00,855 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:27:00,855 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:27:00,856 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/heap-data/process_queue.i Unable to find full path for "g++" [2024-11-13 15:27:02,924 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:27:03,281 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:27:03,282 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/sv-benchmarks/c/heap-data/process_queue.i [2024-11-13 15:27:03,295 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/data/9d6449706/962e33772eb34c1083c4e5894eef862e/FLAGf4c520074 [2024-11-13 15:27:03,311 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/data/9d6449706/962e33772eb34c1083c4e5894eef862e [2024-11-13 15:27:03,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:27:03,322 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:27:03,325 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:27:03,325 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:27:03,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:27:03,333 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,336 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d8611a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03, skipping insertion in model container [2024-11-13 15:27:03,336 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,370 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:27:03,719 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_20fe2850-6b37-49fa-8845-1d589a4e90ea/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2024-11-13 15:27:03,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:27:03,742 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:27:03,783 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_20fe2850-6b37-49fa-8845-1d589a4e90ea/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2024-11-13 15:27:03,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:27:03,820 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:27:03,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03 WrapperNode [2024-11-13 15:27:03,821 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:27:03,822 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:27:03,822 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:27:03,822 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:27:03,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,866 INFO L138 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 112 [2024-11-13 15:27:03,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:27:03,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:27:03,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:27:03,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:27:03,877 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,887 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,924 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 13, 6]. 62 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 7 writes are split as follows [0, 5, 2]. [2024-11-13 15:27:03,925 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,925 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,937 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,946 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,948 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,953 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:27:03,962 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:27:03,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:27:03,962 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:27:03,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (1/1) ... [2024-11-13 15:27:03,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:27:03,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:04,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:27:04,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:27:04,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 15:27:04,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 15:27:04,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-13 15:27:04,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 15:27:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 15:27:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-13 15:27:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 15:27:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:27:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 15:27:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-13 15:27:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-13 15:27:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-13 15:27:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-13 15:27:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-13 15:27:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-13 15:27:04,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 15:27:04,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-13 15:27:04,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-13 15:27:04,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-13 15:27:04,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 15:27:04,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 15:27:04,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-13 15:27:04,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:27:04,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:27:04,258 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:27:04,260 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:27:04,601 INFO L? ?]: Removed 43 outVars from TransFormulas that were not future-live. [2024-11-13 15:27:04,602 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:27:04,613 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:27:04,613 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 15:27:04,613 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:27:04 BoogieIcfgContainer [2024-11-13 15:27:04,613 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:27:04,617 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:27:04,617 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:27:04,623 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:27:04,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:27:03" (1/3) ... [2024-11-13 15:27:04,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118d45a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:27:04, skipping insertion in model container [2024-11-13 15:27:04,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:27:03" (2/3) ... [2024-11-13 15:27:04,625 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118d45a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:27:04, skipping insertion in model container [2024-11-13 15:27:04,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:27:04" (3/3) ... [2024-11-13 15:27:04,626 INFO L112 eAbstractionObserver]: Analyzing ICFG process_queue.i [2024-11-13 15:27:04,645 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:27:04,647 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG process_queue.i that has 1 procedures, 27 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 15:27:04,720 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:27:04,738 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;@6a9a1851, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:27:04,740 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 15:27:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 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) [2024-11-13 15:27:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 15:27:04,751 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:04,751 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:04,752 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:04,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:04,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1382220595, now seen corresponding path program 1 times [2024-11-13 15:27:04,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:04,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291823697] [2024-11-13 15:27:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:04,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:05,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:05,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291823697] [2024-11-13 15:27:05,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291823697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:27:05,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:27:05,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:27:05,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620795405] [2024-11-13 15:27:05,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:27:05,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:27:05,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:05,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:27:05,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:27:05,171 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-11-13 15:27:05,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:05,221 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2024-11-13 15:27:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:27:05,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2024-11-13 15:27:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:05,233 INFO L225 Difference]: With dead ends: 53 [2024-11-13 15:27:05,233 INFO L226 Difference]: Without dead ends: 24 [2024-11-13 15:27:05,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:27:05,242 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:05,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:27:05,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-13 15:27:05,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-13 15:27:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 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) [2024-11-13 15:27:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-11-13 15:27:05,284 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2024-11-13 15:27:05,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:05,285 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-11-13 15:27:05,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-11-13 15:27:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-11-13 15:27:05,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 15:27:05,288 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:05,288 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:05,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 15:27:05,289 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:05,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:05,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1529983955, now seen corresponding path program 1 times [2024-11-13 15:27:05,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:05,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697359668] [2024-11-13 15:27:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:05,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:05,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:05,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697359668] [2024-11-13 15:27:05,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697359668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:27:05,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:27:05,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:27:05,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73378595] [2024-11-13 15:27:05,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:27:05,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:27:05,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:05,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:27:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:27:05,504 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-13 15:27:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:05,634 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2024-11-13 15:27:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:27:05,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2024-11-13 15:27:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:05,640 INFO L225 Difference]: With dead ends: 59 [2024-11-13 15:27:05,640 INFO L226 Difference]: Without dead ends: 37 [2024-11-13 15:27:05,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:27:05,641 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:05,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 91 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:27:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-13 15:27:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-13 15:27:05,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:27:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-11-13 15:27:05,661 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 11 [2024-11-13 15:27:05,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:05,661 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-11-13 15:27:05,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-13 15:27:05,664 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-11-13 15:27:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 15:27:05,668 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:05,668 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:05,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 15:27:05,669 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:05,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash -392786767, now seen corresponding path program 1 times [2024-11-13 15:27:05,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:05,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565508712] [2024-11-13 15:27:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:05,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:06,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:06,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565508712] [2024-11-13 15:27:06,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565508712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:27:06,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:27:06,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 15:27:06,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385695308] [2024-11-13 15:27:06,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:27:06,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:27:06,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:06,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:27:06,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:27:06,689 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2024-11-13 15:27:07,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:07,006 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-11-13 15:27:07,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:27:07,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 11 [2024-11-13 15:27:07,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:07,009 INFO L225 Difference]: With dead ends: 63 [2024-11-13 15:27:07,009 INFO L226 Difference]: Without dead ends: 61 [2024-11-13 15:27:07,010 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:27:07,011 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:07,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 109 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:27:07,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-13 15:27:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-11-13 15:27:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 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) [2024-11-13 15:27:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2024-11-13 15:27:07,035 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 11 [2024-11-13 15:27:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:07,038 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2024-11-13 15:27:07,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2024-11-13 15:27:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2024-11-13 15:27:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 15:27:07,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:07,039 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:07,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 15:27:07,039 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:07,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash -245023407, now seen corresponding path program 1 times [2024-11-13 15:27:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:07,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446655142] [2024-11-13 15:27:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:07,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:07,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:07,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446655142] [2024-11-13 15:27:07,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446655142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:27:07,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:27:07,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:27:07,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514177584] [2024-11-13 15:27:07,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:27:07,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:27:07,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:07,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:27:07,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:27:07,199 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-13 15:27:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:07,305 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2024-11-13 15:27:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:27:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2024-11-13 15:27:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:07,308 INFO L225 Difference]: With dead ends: 104 [2024-11-13 15:27:07,308 INFO L226 Difference]: Without dead ends: 52 [2024-11-13 15:27:07,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:27:07,310 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:07,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 79 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:27:07,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-13 15:27:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-13 15:27:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 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) [2024-11-13 15:27:07,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2024-11-13 15:27:07,328 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 11 [2024-11-13 15:27:07,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:07,329 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2024-11-13 15:27:07,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-13 15:27:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2024-11-13 15:27:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 15:27:07,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:07,330 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:07,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 15:27:07,330 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:07,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:07,331 INFO L85 PathProgramCache]: Analyzing trace with hash -2015750733, now seen corresponding path program 1 times [2024-11-13 15:27:07,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:07,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365482397] [2024-11-13 15:27:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:07,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:08,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:08,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365482397] [2024-11-13 15:27:08,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365482397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:27:08,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621795864] [2024-11-13 15:27:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:08,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:08,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:08,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:27:08,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:27:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:08,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-13 15:27:08,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:27:08,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:27:08,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-13 15:27:08,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:27:08,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-13 15:27:08,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2024-11-13 15:27:08,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-11-13 15:27:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:08,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:27:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:08,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621795864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:27:08,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:27:08,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-11-13 15:27:08,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228911263] [2024-11-13 15:27:08,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:27:08,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:27:08,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:08,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:27:08,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:27:08,656 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-11-13 15:27:08,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:08,932 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2024-11-13 15:27:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:27:08,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 14 [2024-11-13 15:27:08,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:08,934 INFO L225 Difference]: With dead ends: 93 [2024-11-13 15:27:08,934 INFO L226 Difference]: Without dead ends: 53 [2024-11-13 15:27:08,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:27:08,935 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:08,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 115 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:27:08,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-13 15:27:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-11-13 15:27:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.28) internal successors, (64), 50 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) [2024-11-13 15:27:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2024-11-13 15:27:08,951 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 14 [2024-11-13 15:27:08,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:08,951 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2024-11-13 15:27:08,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-11-13 15:27:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2024-11-13 15:27:08,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-13 15:27:08,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:08,954 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:08,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 15:27:09,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:09,155 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:09,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:09,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1445741404, now seen corresponding path program 1 times [2024-11-13 15:27:09,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:09,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161288173] [2024-11-13 15:27:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:09,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:09,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:09,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161288173] [2024-11-13 15:27:09,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161288173] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:27:09,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:27:09,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:27:09,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105511378] [2024-11-13 15:27:09,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:27:09,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:27:09,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:09,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:27:09,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:27:09,431 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2024-11-13 15:27:09,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:09,495 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2024-11-13 15:27:09,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:27:09,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 20 [2024-11-13 15:27:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:09,496 INFO L225 Difference]: With dead ends: 116 [2024-11-13 15:27:09,499 INFO L226 Difference]: Without dead ends: 77 [2024-11-13 15:27:09,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:27:09,500 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:09,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 84 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:27:09,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-13 15:27:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2024-11-13 15:27:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3) internal successors, (91), 70 states have internal predecessors, (91), 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) [2024-11-13 15:27:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2024-11-13 15:27:09,518 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 20 [2024-11-13 15:27:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:09,519 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2024-11-13 15:27:09,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2024-11-13 15:27:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2024-11-13 15:27:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-13 15:27:09,522 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:09,522 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:09,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 15:27:09,522 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:09,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:09,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1139984926, now seen corresponding path program 1 times [2024-11-13 15:27:09,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:09,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404588413] [2024-11-13 15:27:09,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:09,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:27:10,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:10,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404588413] [2024-11-13 15:27:10,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404588413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:27:10,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121871300] [2024-11-13 15:27:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:10,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:10,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:10,235 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:27:10,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:27:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:10,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-13 15:27:10,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:27:10,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2024-11-13 15:27:10,596 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-11-13 15:27:10,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:27:10,621 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-13 15:27:10,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-13 15:27:11,237 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-11-13 15:27:11,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 40 [2024-11-13 15:27:11,272 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2024-11-13 15:27:11,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 32 [2024-11-13 15:27:11,301 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-13 15:27:11,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-13 15:27:11,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:11,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 108 [2024-11-13 15:27:11,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:11,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 100 [2024-11-13 15:27:12,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:12,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 59 [2024-11-13 15:27:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:12,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:27:12,585 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_282 (Array Int Int)) (|v_ULTIMATE.start_append_to_queue_~q#1.offset_18| Int) (|v_ULTIMATE.start_append_to_queue_~n#1.base_18| Int)) (let ((.cse0 (select v_ArrVal_282 4))) (or (< 0 (select (select (store |c_#memory_int#1| |v_ULTIMATE.start_append_to_queue_~n#1.base_18| v_ArrVal_282) (select (store (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |v_ULTIMATE.start_append_to_queue_~q#1.offset_18| |v_ULTIMATE.start_append_to_queue_~n#1.base_18|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (+ (select (store (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |v_ULTIMATE.start_append_to_queue_~q#1.offset_18| 0) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 4))) (not (= (store (store (store (select |c_#memory_int#1| |v_ULTIMATE.start_append_to_queue_~n#1.base_18|) 0 (select v_ArrVal_282 0)) 4 .cse0) 8 (select v_ArrVal_282 8)) v_ArrVal_282)) (< .cse0 |c_ULTIMATE.start_main_~next_time~0#1|)))) is different from false [2024-11-13 15:27:13,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:13,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 80 [2024-11-13 15:27:13,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:13,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 141 [2024-11-13 15:27:13,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-13 15:27:13,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-13 15:27:13,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:13,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2416 treesize of output 2304 [2024-11-13 15:27:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2024-11-13 15:27:14,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121871300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:27:14,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:27:14,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2024-11-13 15:27:14,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787978590] [2024-11-13 15:27:14,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:27:14,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 15:27:14,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:14,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 15:27:14,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=257, Unknown=1, NotChecked=32, Total=342 [2024-11-13 15:27:14,489 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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) [2024-11-13 15:27:14,890 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|)) (.cse1 (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|))) (and (<= 1 |c_ULTIMATE.start_main_~next_time~0#1|) (= (select .cse0 |c_ULTIMATE.start_main_~#queue~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~next_time~0#1| 1) (= 0 (select .cse1 |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (or (forall ((v_ArrVal_282 (Array Int Int)) (|v_ULTIMATE.start_append_to_queue_~q#1.offset_18| Int) (|v_ULTIMATE.start_append_to_queue_~n#1.base_18| Int)) (let ((.cse2 (select v_ArrVal_282 4))) (or (< 0 (select (select (store |c_#memory_int#1| |v_ULTIMATE.start_append_to_queue_~n#1.base_18| v_ArrVal_282) (select (store .cse0 |v_ULTIMATE.start_append_to_queue_~q#1.offset_18| |v_ULTIMATE.start_append_to_queue_~n#1.base_18|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (+ (select (store .cse1 |v_ULTIMATE.start_append_to_queue_~q#1.offset_18| 0) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 4))) (not (= (store (store (store (select |c_#memory_int#1| |v_ULTIMATE.start_append_to_queue_~n#1.base_18|) 0 (select v_ArrVal_282 0)) 4 .cse2) 8 (select v_ArrVal_282 8)) v_ArrVal_282)) (< .cse2 |c_ULTIMATE.start_main_~next_time~0#1|)))) (and (= |c_ULTIMATE.start_check_queue_~n~0#1.base| 0) (= |c_ULTIMATE.start_check_queue_~n~0#1.offset| 0))))) is different from false [2024-11-13 15:27:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:20,388 INFO L93 Difference]: Finished difference Result 322 states and 419 transitions. [2024-11-13 15:27:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 15:27:20,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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 23 [2024-11-13 15:27:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:20,391 INFO L225 Difference]: With dead ends: 322 [2024-11-13 15:27:20,391 INFO L226 Difference]: Without dead ends: 263 [2024-11-13 15:27:20,394 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 4 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=495, Invalid=1406, Unknown=87, NotChecked=174, Total=2162 [2024-11-13 15:27:20,395 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 345 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 25 mSolverCounterUnsat, 69 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 69 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:20,396 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 438 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 413 Invalid, 69 Unknown, 149 Unchecked, 1.9s Time] [2024-11-13 15:27:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-13 15:27:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 210. [2024-11-13 15:27:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.2870813397129186) internal successors, (269), 209 states have internal predecessors, (269), 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) [2024-11-13 15:27:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 269 transitions. [2024-11-13 15:27:20,438 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 269 transitions. Word has length 23 [2024-11-13 15:27:20,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:20,438 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 269 transitions. [2024-11-13 15:27:20,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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) [2024-11-13 15:27:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 269 transitions. [2024-11-13 15:27:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-13 15:27:20,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:20,439 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:20,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 15:27:20,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:20,646 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:20,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:20,647 INFO L85 PathProgramCache]: Analyzing trace with hash -980610334, now seen corresponding path program 2 times [2024-11-13 15:27:20,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:20,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211569287] [2024-11-13 15:27:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:20,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:22,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:22,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211569287] [2024-11-13 15:27:22,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211569287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:27:22,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113434080] [2024-11-13 15:27:22,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:27:22,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:22,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:22,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:27:22,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:27:22,567 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:27:22,568 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:27:22,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-13 15:27:22,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:27:22,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2024-11-13 15:27:22,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 15:27:22,725 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-11-13 15:27:22,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:27:22,745 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-13 15:27:22,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-13 15:27:23,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-11-13 15:27:23,341 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-11-13 15:27:23,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 74 [2024-11-13 15:27:23,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:23,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 125 [2024-11-13 15:27:23,446 INFO L349 Elim1Store]: treesize reduction 90, result has 37.9 percent of original size [2024-11-13 15:27:23,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 98 [2024-11-13 15:27:23,496 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-11-13 15:27:23,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 62 [2024-11-13 15:27:23,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-13 15:27:24,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:24,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 90 [2024-11-13 15:27:24,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:24,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 70 [2024-11-13 15:27:24,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2024-11-13 15:27:24,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-13 15:27:24,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:27:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:27:24,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:27:24,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:24,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 319 treesize of output 314 [2024-11-13 15:27:24,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 15:27:24,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 41 [2024-11-13 15:27:24,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:24,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 951 treesize of output 918 [2024-11-13 15:27:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:27:25,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113434080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:27:25,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:27:25,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2024-11-13 15:27:25,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148898661] [2024-11-13 15:27:25,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:27:25,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 15:27:25,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 15:27:25,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:27:25,478 INFO L87 Difference]: Start difference. First operand 210 states and 269 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 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) [2024-11-13 15:27:28,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:28,141 INFO L93 Difference]: Finished difference Result 343 states and 445 transitions. [2024-11-13 15:27:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 15:27:28,142 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 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 26 [2024-11-13 15:27:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:28,144 INFO L225 Difference]: With dead ends: 343 [2024-11-13 15:27:28,145 INFO L226 Difference]: Without dead ends: 341 [2024-11-13 15:27:28,146 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=404, Invalid=1488, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 15:27:28,147 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 301 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:28,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 414 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 15:27:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2024-11-13 15:27:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 239. [2024-11-13 15:27:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.2857142857142858) internal successors, (306), 238 states have internal predecessors, (306), 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) [2024-11-13 15:27:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 306 transitions. [2024-11-13 15:27:28,195 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 306 transitions. Word has length 26 [2024-11-13 15:27:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:28,196 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 306 transitions. [2024-11-13 15:27:28,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 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) [2024-11-13 15:27:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 306 transitions. [2024-11-13 15:27:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 15:27:28,197 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:28,197 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:28,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 15:27:28,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:28,398 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:28,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:28,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1008997858, now seen corresponding path program 3 times [2024-11-13 15:27:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:28,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100243401] [2024-11-13 15:27:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:28,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:27:29,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:29,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100243401] [2024-11-13 15:27:29,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100243401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:27:29,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106140048] [2024-11-13 15:27:29,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:27:29,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:29,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:29,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:27:29,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:27:30,410 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 15:27:30,410 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:27:30,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-13 15:27:30,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:27:30,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:27:30,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:27:30,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:27:30,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:27:30,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 15:27:30,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 33 [2024-11-13 15:27:30,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:27:30,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2024-11-13 15:27:30,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:27:30,670 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2024-11-13 15:27:30,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2024-11-13 15:27:30,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2024-11-13 15:27:30,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 15:27:30,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:27:30,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2024-11-13 15:27:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:27:30,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:27:31,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:31,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2024-11-13 15:27:31,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:31,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2024-11-13 15:27:31,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 15:27:31,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 15:27:31,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:31,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2024-11-13 15:27:31,562 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:27:31,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-13 15:27:31,573 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:31,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-11-13 15:27:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:27:31,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 15:27:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:27:31,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106140048] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:27:31,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:27:31,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-13 15:27:31,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548935282] [2024-11-13 15:27:31,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:27:31,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 15:27:31,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:31,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 15:27:31,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:27:31,597 INFO L87 Difference]: Start difference. First operand 239 states and 306 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 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) [2024-11-13 15:27:32,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:32,452 INFO L93 Difference]: Finished difference Result 539 states and 697 transitions. [2024-11-13 15:27:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:27:32,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 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 29 [2024-11-13 15:27:32,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:32,455 INFO L225 Difference]: With dead ends: 539 [2024-11-13 15:27:32,455 INFO L226 Difference]: Without dead ends: 364 [2024-11-13 15:27:32,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:27:32,457 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 80 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:32,458 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 401 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 15:27:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-13 15:27:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 357. [2024-11-13 15:27:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.2640449438202248) internal successors, (450), 356 states have internal predecessors, (450), 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) [2024-11-13 15:27:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 450 transitions. [2024-11-13 15:27:32,527 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 450 transitions. Word has length 29 [2024-11-13 15:27:32,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:32,528 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 450 transitions. [2024-11-13 15:27:32,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 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) [2024-11-13 15:27:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 450 transitions. [2024-11-13 15:27:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 15:27:32,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:32,530 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:32,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 15:27:32,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:32,730 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:32,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1923670215, now seen corresponding path program 1 times [2024-11-13 15:27:32,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:32,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359600662] [2024-11-13 15:27:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:32,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:27:32,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:32,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359600662] [2024-11-13 15:27:32,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359600662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:27:32,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307150805] [2024-11-13 15:27:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:32,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:32,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:32,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:27:32,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:27:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:33,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 15:27:33,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:27:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:27:33,096 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:27:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:27:33,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307150805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:27:33,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:27:33,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-13 15:27:33,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335558847] [2024-11-13 15:27:33,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:27:33,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:27:33,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:27:33,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:27:33,147 INFO L87 Difference]: Start difference. First operand 357 states and 450 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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) [2024-11-13 15:27:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:33,466 INFO L93 Difference]: Finished difference Result 1113 states and 1442 transitions. [2024-11-13 15:27:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:27:33,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-13 15:27:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:33,473 INFO L225 Difference]: With dead ends: 1113 [2024-11-13 15:27:33,474 INFO L226 Difference]: Without dead ends: 799 [2024-11-13 15:27:33,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:27:33,477 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 116 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:33,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 168 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:27:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2024-11-13 15:27:33,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 734. [2024-11-13 15:27:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.2564802182810368) internal successors, (921), 733 states have internal predecessors, (921), 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) [2024-11-13 15:27:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 921 transitions. [2024-11-13 15:27:33,628 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 921 transitions. Word has length 30 [2024-11-13 15:27:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:33,628 INFO L471 AbstractCegarLoop]: Abstraction has 734 states and 921 transitions. [2024-11-13 15:27:33,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 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) [2024-11-13 15:27:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 921 transitions. [2024-11-13 15:27:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 15:27:33,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:33,633 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:33,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 15:27:33,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:33,834 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:33,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:33,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1360179831, now seen corresponding path program 1 times [2024-11-13 15:27:33,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:33,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767155266] [2024-11-13 15:27:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:33,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:27:34,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767155266] [2024-11-13 15:27:34,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767155266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:27:34,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660720694] [2024-11-13 15:27:34,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:34,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:34,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:34,341 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:27:34,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:27:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:34,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-13 15:27:34,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:27:34,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:27:34,650 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-13 15:27:34,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-11-13 15:27:34,674 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-11-13 15:27:34,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:27:35,019 INFO L349 Elim1Store]: treesize reduction 45, result has 35.7 percent of original size [2024-11-13 15:27:35,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 32 [2024-11-13 15:27:35,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-13 15:27:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:27:35,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:27:35,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:35,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 527 treesize of output 526 [2024-11-13 15:27:36,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:27:36,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2024-11-13 15:27:36,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:36,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 307 treesize of output 285 [2024-11-13 15:27:36,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:36,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24336 treesize of output 23682 [2024-11-13 15:27:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:38,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660720694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:27:38,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:27:38,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 10] total 19 [2024-11-13 15:27:38,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335784112] [2024-11-13 15:27:38,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:27:38,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 15:27:38,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:38,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 15:27:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-13 15:27:38,553 INFO L87 Difference]: Start difference. First operand 734 states and 921 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:27:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:39,358 INFO L93 Difference]: Finished difference Result 1089 states and 1377 transitions. [2024-11-13 15:27:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:27:39,359 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-13 15:27:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:39,363 INFO L225 Difference]: With dead ends: 1089 [2024-11-13 15:27:39,363 INFO L226 Difference]: Without dead ends: 825 [2024-11-13 15:27:39,364 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2024-11-13 15:27:39,365 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:39,365 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 271 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 15:27:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2024-11-13 15:27:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 735. [2024-11-13 15:27:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 1.2561307901907357) internal successors, (922), 734 states have internal predecessors, (922), 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) [2024-11-13 15:27:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 922 transitions. [2024-11-13 15:27:39,521 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 922 transitions. Word has length 30 [2024-11-13 15:27:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:39,522 INFO L471 AbstractCegarLoop]: Abstraction has 735 states and 922 transitions. [2024-11-13 15:27:39,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 19 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:27:39,522 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 922 transitions. [2024-11-13 15:27:39,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 15:27:39,523 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:39,523 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:39,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 15:27:39,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 15:27:39,726 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:39,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:39,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1718529634, now seen corresponding path program 1 times [2024-11-13 15:27:39,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:39,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110806163] [2024-11-13 15:27:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:39,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:27:39,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:39,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110806163] [2024-11-13 15:27:39,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110806163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:27:39,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859010030] [2024-11-13 15:27:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:39,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:39,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:39,998 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:27:40,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 15:27:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:40,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-13 15:27:40,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:27:40,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-13 15:27:40,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-13 15:27:40,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-13 15:27:40,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-13 15:27:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:27:40,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:27:40,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-11-13 15:27:40,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:27:40,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:27:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:27:40,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859010030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:27:40,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:27:40,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-11-13 15:27:40,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30546106] [2024-11-13 15:27:40,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:27:40,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:27:40,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:40,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:27:40,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:27:40,441 INFO L87 Difference]: Start difference. First operand 735 states and 922 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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) [2024-11-13 15:27:40,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:40,837 INFO L93 Difference]: Finished difference Result 1198 states and 1520 transitions. [2024-11-13 15:27:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:27:40,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 31 [2024-11-13 15:27:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:40,843 INFO L225 Difference]: With dead ends: 1198 [2024-11-13 15:27:40,844 INFO L226 Difference]: Without dead ends: 474 [2024-11-13 15:27:40,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:27:40,846 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:40,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 126 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:27:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2024-11-13 15:27:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 448. [2024-11-13 15:27:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.261744966442953) internal successors, (564), 447 states have internal predecessors, (564), 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) [2024-11-13 15:27:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 564 transitions. [2024-11-13 15:27:40,942 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 564 transitions. Word has length 31 [2024-11-13 15:27:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:40,943 INFO L471 AbstractCegarLoop]: Abstraction has 448 states and 564 transitions. [2024-11-13 15:27:40,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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) [2024-11-13 15:27:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 564 transitions. [2024-11-13 15:27:40,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 15:27:40,947 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:40,947 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:40,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 15:27:41,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:41,151 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:41,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1325502624, now seen corresponding path program 1 times [2024-11-13 15:27:41,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:41,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149419622] [2024-11-13 15:27:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:41,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:27:41,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:41,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149419622] [2024-11-13 15:27:41,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149419622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:27:41,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:27:41,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:27:41,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476309391] [2024-11-13 15:27:41,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:27:41,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:27:41,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:41,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:27:41,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:27:41,215 INFO L87 Difference]: Start difference. First operand 448 states and 564 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:27:41,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:41,287 INFO L93 Difference]: Finished difference Result 745 states and 958 transitions. [2024-11-13 15:27:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:27:41,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-13 15:27:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:41,291 INFO L225 Difference]: With dead ends: 745 [2024-11-13 15:27:41,291 INFO L226 Difference]: Without dead ends: 469 [2024-11-13 15:27:41,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:27:41,293 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:41,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 59 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:27:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-11-13 15:27:41,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 458. [2024-11-13 15:27:41,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.2713347921225382) internal successors, (581), 457 states have internal predecessors, (581), 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) [2024-11-13 15:27:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 581 transitions. [2024-11-13 15:27:41,357 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 581 transitions. Word has length 31 [2024-11-13 15:27:41,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:41,358 INFO L471 AbstractCegarLoop]: Abstraction has 458 states and 581 transitions. [2024-11-13 15:27:41,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:27:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 581 transitions. [2024-11-13 15:27:41,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-13 15:27:41,358 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:41,359 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:41,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 15:27:41,359 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:41,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:41,361 INFO L85 PathProgramCache]: Analyzing trace with hash 640615605, now seen corresponding path program 1 times [2024-11-13 15:27:41,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:41,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986094152] [2024-11-13 15:27:41,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:41,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:27:42,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:42,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986094152] [2024-11-13 15:27:42,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986094152] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:27:42,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535983478] [2024-11-13 15:27:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:42,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:42,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:42,102 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:27:42,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 15:27:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:42,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 15:27:42,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:27:42,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2024-11-13 15:27:42,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:27:42,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:27:42,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:27:42,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:27:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:27:42,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:27:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:27:42,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535983478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:27:42,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:27:42,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-13 15:27:42,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133662248] [2024-11-13 15:27:42,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:27:42,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:27:42,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:27:42,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:27:42,654 INFO L87 Difference]: Start difference. First operand 458 states and 581 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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) [2024-11-13 15:27:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:43,336 INFO L93 Difference]: Finished difference Result 892 states and 1151 transitions. [2024-11-13 15:27:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 15:27:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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 32 [2024-11-13 15:27:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:43,340 INFO L225 Difference]: With dead ends: 892 [2024-11-13 15:27:43,341 INFO L226 Difference]: Without dead ends: 563 [2024-11-13 15:27:43,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-11-13 15:27:43,342 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 133 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:43,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 303 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 15:27:43,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2024-11-13 15:27:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 343. [2024-11-13 15:27:43,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.2660818713450293) internal successors, (433), 342 states have internal predecessors, (433), 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) [2024-11-13 15:27:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 433 transitions. [2024-11-13 15:27:43,393 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 433 transitions. Word has length 32 [2024-11-13 15:27:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:43,394 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 433 transitions. [2024-11-13 15:27:43,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 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) [2024-11-13 15:27:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 433 transitions. [2024-11-13 15:27:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 15:27:43,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:43,395 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:43,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 15:27:43,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:43,596 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:43,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:43,596 INFO L85 PathProgramCache]: Analyzing trace with hash 191150975, now seen corresponding path program 1 times [2024-11-13 15:27:43,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:43,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434591308] [2024-11-13 15:27:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:43,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:27:44,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:44,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434591308] [2024-11-13 15:27:44,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434591308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:27:44,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118434040] [2024-11-13 15:27:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:44,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:44,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:44,045 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:27:44,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 15:27:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:44,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-13 15:27:44,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:27:44,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-11-13 15:27:44,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-11-13 15:27:44,409 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-11-13 15:27:44,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2024-11-13 15:27:44,459 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-11-13 15:27:44,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2024-11-13 15:27:44,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2024-11-13 15:27:44,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 44 [2024-11-13 15:27:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:44,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:27:45,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 94 [2024-11-13 15:27:45,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 113 [2024-11-13 15:27:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:45,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118434040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:27:45,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:27:45,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 13 [2024-11-13 15:27:45,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555557050] [2024-11-13 15:27:45,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:27:45,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:27:45,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:45,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:27:45,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:27:45,388 INFO L87 Difference]: Start difference. First operand 343 states and 433 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 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) [2024-11-13 15:27:45,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:45,914 INFO L93 Difference]: Finished difference Result 709 states and 895 transitions. [2024-11-13 15:27:45,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:27:45,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 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 34 [2024-11-13 15:27:45,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:45,917 INFO L225 Difference]: With dead ends: 709 [2024-11-13 15:27:45,918 INFO L226 Difference]: Without dead ends: 401 [2024-11-13 15:27:45,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-11-13 15:27:45,919 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:45,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 259 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:27:45,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-11-13 15:27:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 376. [2024-11-13 15:27:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.256) internal successors, (471), 375 states have internal predecessors, (471), 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) [2024-11-13 15:27:45,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 471 transitions. [2024-11-13 15:27:45,993 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 471 transitions. Word has length 34 [2024-11-13 15:27:45,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:45,993 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 471 transitions. [2024-11-13 15:27:45,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 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) [2024-11-13 15:27:45,993 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 471 transitions. [2024-11-13 15:27:45,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 15:27:45,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:45,994 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2024-11-13 15:27:46,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 15:27:46,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 15:27:46,194 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:46,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:46,195 INFO L85 PathProgramCache]: Analyzing trace with hash 910111955, now seen corresponding path program 4 times [2024-11-13 15:27:46,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:46,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179733610] [2024-11-13 15:27:46,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:46,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:27:46,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:46,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179733610] [2024-11-13 15:27:46,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179733610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:27:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995685477] [2024-11-13 15:27:46,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:27:46,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:46,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:46,952 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:27:46,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 15:27:47,285 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:27:47,285 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:27:47,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-13 15:27:47,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:27:47,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:27:47,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:27:47,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:27:47,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2024-11-13 15:27:47,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:27:47,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 15:27:47,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 15:27:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:27:47,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:27:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:27:47,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995685477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:27:47,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:27:47,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 13 [2024-11-13 15:27:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995246923] [2024-11-13 15:27:47,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:27:47,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:27:47,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:47,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:27:47,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:27:47,664 INFO L87 Difference]: Start difference. First operand 376 states and 471 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:27:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:48,021 INFO L93 Difference]: Finished difference Result 751 states and 946 transitions. [2024-11-13 15:27:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:27:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-13 15:27:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:48,024 INFO L225 Difference]: With dead ends: 751 [2024-11-13 15:27:48,024 INFO L226 Difference]: Without dead ends: 443 [2024-11-13 15:27:48,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:27:48,025 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 90 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:48,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 257 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:27:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2024-11-13 15:27:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 373. [2024-11-13 15:27:48,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.239247311827957) internal successors, (461), 372 states have internal predecessors, (461), 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) [2024-11-13 15:27:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 461 transitions. [2024-11-13 15:27:48,082 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 461 transitions. Word has length 41 [2024-11-13 15:27:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:48,082 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 461 transitions. [2024-11-13 15:27:48,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:27:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 461 transitions. [2024-11-13 15:27:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 15:27:48,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:48,083 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:27:48,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 15:27:48,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 15:27:48,287 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:48,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1032789265, now seen corresponding path program 2 times [2024-11-13 15:27:48,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:48,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932498195] [2024-11-13 15:27:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:48,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 15:27:49,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:49,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932498195] [2024-11-13 15:27:49,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932498195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:27:49,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749571834] [2024-11-13 15:27:49,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:27:49,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:49,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:49,133 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:27:49,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 15:27:49,475 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:27:49,476 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:27:49,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-13 15:27:49,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:27:49,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:27:49,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:27:49,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:27:49,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:27:49,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-11-13 15:27:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 15:27:49,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:27:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 15:27:49,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749571834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:27:49,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:27:49,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-11-13 15:27:49,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014773396] [2024-11-13 15:27:49,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:27:49,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:27:49,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:49,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:27:49,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:27:49,840 INFO L87 Difference]: Start difference. First operand 373 states and 461 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:27:50,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:50,285 INFO L93 Difference]: Finished difference Result 847 states and 1057 transitions. [2024-11-13 15:27:50,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:27:50,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-13 15:27:50,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:50,288 INFO L225 Difference]: With dead ends: 847 [2024-11-13 15:27:50,288 INFO L226 Difference]: Without dead ends: 509 [2024-11-13 15:27:50,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:27:50,289 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 77 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:50,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 205 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:27:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2024-11-13 15:27:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 430. [2024-11-13 15:27:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.2447552447552448) internal successors, (534), 429 states have internal predecessors, (534), 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) [2024-11-13 15:27:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 534 transitions. [2024-11-13 15:27:50,358 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 534 transitions. Word has length 43 [2024-11-13 15:27:50,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:50,358 INFO L471 AbstractCegarLoop]: Abstraction has 430 states and 534 transitions. [2024-11-13 15:27:50,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:27:50,358 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 534 transitions. [2024-11-13 15:27:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 15:27:50,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:50,359 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2024-11-13 15:27:50,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 15:27:50,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 15:27:50,560 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:50,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:50,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1805528621, now seen corresponding path program 5 times [2024-11-13 15:27:50,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:50,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457220795] [2024-11-13 15:27:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:50,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:27:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:27:53,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:27:53,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457220795] [2024-11-13 15:27:53,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457220795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:27:53,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962569139] [2024-11-13 15:27:53,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 15:27:53,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:27:53,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:27:53,814 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:27:53,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 15:27:54,237 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 15:27:54,237 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:27:54,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 167 conjuncts are in the unsatisfiable core [2024-11-13 15:27:54,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:27:54,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 15:27:54,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:27:54,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:27:54,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:27:54,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:27:54,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:27:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:27:54,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2024-11-13 15:27:54,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2024-11-13 15:27:54,570 INFO L349 Elim1Store]: treesize reduction 50, result has 37.5 percent of original size [2024-11-13 15:27:54,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2024-11-13 15:27:55,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 26 [2024-11-13 15:27:55,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 22 [2024-11-13 15:27:55,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 58 [2024-11-13 15:27:55,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:27:55,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 56 [2024-11-13 15:27:55,087 INFO L349 Elim1Store]: treesize reduction 8, result has 86.0 percent of original size [2024-11-13 15:27:55,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 58 [2024-11-13 15:27:55,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 29 [2024-11-13 15:27:55,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2024-11-13 15:27:55,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:27:55,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 115 [2024-11-13 15:27:55,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 87 [2024-11-13 15:27:55,526 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 15:27:55,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 33 [2024-11-13 15:27:55,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2024-11-13 15:27:55,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:27:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 3 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:27:55,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:27:55,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:55,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 68 [2024-11-13 15:27:55,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:55,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2024-11-13 15:27:56,172 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:56,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 78 [2024-11-13 15:27:56,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:56,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 58 [2024-11-13 15:27:56,187 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:27:56,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-11-13 15:27:56,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 54 [2024-11-13 15:27:56,197 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:27:56,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2024-11-13 15:27:56,430 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:27:56,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 112 [2024-11-13 15:27:56,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2024-11-13 15:27:56,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2024-11-13 15:27:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 58 refuted. 2 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:27:56,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962569139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:27:56,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:27:56,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 12] total 33 [2024-11-13 15:27:56,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613519766] [2024-11-13 15:27:56,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:27:56,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 15:27:56,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:27:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 15:27:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=918, Unknown=2, NotChecked=0, Total=1056 [2024-11-13 15:27:56,732 INFO L87 Difference]: Start difference. First operand 430 states and 534 transitions. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 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) [2024-11-13 15:27:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:27:59,428 INFO L93 Difference]: Finished difference Result 555 states and 685 transitions. [2024-11-13 15:27:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 15:27:59,428 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 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) Word has length 44 [2024-11-13 15:27:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:27:59,431 INFO L225 Difference]: With dead ends: 555 [2024-11-13 15:27:59,431 INFO L226 Difference]: Without dead ends: 553 [2024-11-13 15:27:59,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=471, Invalid=1977, Unknown=2, NotChecked=0, Total=2450 [2024-11-13 15:27:59,433 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 159 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:27:59,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 671 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 15:27:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2024-11-13 15:27:59,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 484. [2024-11-13 15:27:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.2443064182194616) internal successors, (601), 483 states have internal predecessors, (601), 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) [2024-11-13 15:27:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 601 transitions. [2024-11-13 15:27:59,517 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 601 transitions. Word has length 44 [2024-11-13 15:27:59,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:27:59,518 INFO L471 AbstractCegarLoop]: Abstraction has 484 states and 601 transitions. [2024-11-13 15:27:59,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 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) [2024-11-13 15:27:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 601 transitions. [2024-11-13 15:27:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 15:27:59,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:27:59,519 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2024-11-13 15:27:59,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 15:27:59,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 15:27:59,723 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:27:59,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:27:59,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1671177553, now seen corresponding path program 6 times [2024-11-13 15:27:59,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:27:59,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884950411] [2024-11-13 15:27:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:27:59,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:27:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:28:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:28:02,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:28:02,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884950411] [2024-11-13 15:28:02,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884950411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:28:02,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520441781] [2024-11-13 15:28:02,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 15:28:02,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:28:02,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:28:02,822 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:28:02,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 15:28:03,292 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-13 15:28:03,293 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:28:03,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-13 15:28:03,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:28:03,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:28:03,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:28:03,466 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-11-13 15:28:03,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 34 [2024-11-13 15:28:03,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 15:28:03,500 INFO L349 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2024-11-13 15:28:03,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2024-11-13 15:28:04,779 INFO L349 Elim1Store]: treesize reduction 72, result has 44.6 percent of original size [2024-11-13 15:28:04,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 150 treesize of output 160 [2024-11-13 15:28:04,844 INFO L349 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2024-11-13 15:28:04,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 108 treesize of output 109 [2024-11-13 15:28:04,899 INFO L349 Elim1Store]: treesize reduction 34, result has 50.7 percent of original size [2024-11-13 15:28:04,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 132 [2024-11-13 15:28:04,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 15:28:05,048 INFO L349 Elim1Store]: treesize reduction 104, result has 49.3 percent of original size [2024-11-13 15:28:05,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 105 treesize of output 190 [2024-11-13 15:28:05,104 INFO L349 Elim1Store]: treesize reduction 34, result has 50.7 percent of original size [2024-11-13 15:28:05,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 120 [2024-11-13 15:28:05,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:28:11,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 26 [2024-11-13 15:28:11,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 22 [2024-11-13 15:28:11,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 69 [2024-11-13 15:28:11,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:28:11,895 INFO L349 Elim1Store]: treesize reduction 51, result has 8.9 percent of original size [2024-11-13 15:28:11,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 57 [2024-11-13 15:28:11,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:28:11,923 INFO L349 Elim1Store]: treesize reduction 8, result has 86.0 percent of original size [2024-11-13 15:28:11,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 58 [2024-11-13 15:28:11,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:28:11,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 53 [2024-11-13 15:28:11,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:28:12,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 126 [2024-11-13 15:28:12,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 98 [2024-11-13 15:28:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:28:12,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:28:12,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:12,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 133 [2024-11-13 15:28:12,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:12,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 106 [2024-11-13 15:28:14,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:14,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 155 [2024-11-13 15:28:14,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:14,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 134 [2024-11-13 15:28:15,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:15,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 288 [2024-11-13 15:28:15,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:15,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 252 [2024-11-13 15:28:15,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:15,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1186 treesize of output 1152 [2024-11-13 15:28:15,555 INFO L349 Elim1Store]: treesize reduction 38, result has 74.1 percent of original size [2024-11-13 15:28:15,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1996 treesize of output 2020 [2024-11-13 15:28:15,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:15,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 600 treesize of output 528 [2024-11-13 15:28:15,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:15,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 500 treesize of output 530 [2024-11-13 15:28:15,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:15,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 502 treesize of output 512 [2024-11-13 15:28:15,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 476 treesize of output 458 [2024-11-13 15:28:15,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:15,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 405 treesize of output 454 [2024-11-13 15:28:15,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:15,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 280 [2024-11-13 15:28:15,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:15,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 310 treesize of output 282 [2024-11-13 15:28:16,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:16,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 238 treesize of output 234 [2024-11-13 15:28:16,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 244 [2024-11-13 15:28:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:28:19,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520441781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:28:19,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:28:19,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2024-11-13 15:28:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230942359] [2024-11-13 15:28:19,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:28:19,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 15:28:19,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:28:19,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 15:28:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2024-11-13 15:28:19,900 INFO L87 Difference]: Start difference. First operand 484 states and 601 transitions. Second operand has 32 states, 32 states have (on average 4.03125) internal successors, (129), 32 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:28:24,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:28:24,532 INFO L93 Difference]: Finished difference Result 934 states and 1169 transitions. [2024-11-13 15:28:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 15:28:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.03125) internal successors, (129), 32 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-13 15:28:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:28:24,535 INFO L225 Difference]: With dead ends: 934 [2024-11-13 15:28:24,536 INFO L226 Difference]: Without dead ends: 517 [2024-11-13 15:28:24,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=247, Invalid=1733, Unknown=0, NotChecked=0, Total=1980 [2024-11-13 15:28:24,538 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 96 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:28:24,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 607 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-13 15:28:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2024-11-13 15:28:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 502. [2024-11-13 15:28:24,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.2375249500998005) internal successors, (620), 501 states have internal predecessors, (620), 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) [2024-11-13 15:28:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 620 transitions. [2024-11-13 15:28:24,637 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 620 transitions. Word has length 47 [2024-11-13 15:28:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:28:24,637 INFO L471 AbstractCegarLoop]: Abstraction has 502 states and 620 transitions. [2024-11-13 15:28:24,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.03125) internal successors, (129), 32 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:28:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 620 transitions. [2024-11-13 15:28:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 15:28:24,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:28:24,639 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:28:24,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 15:28:24,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:28:24,843 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:28:24,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:28:24,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1147543220, now seen corresponding path program 2 times [2024-11-13 15:28:24,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:28:24,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218365545] [2024-11-13 15:28:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:28:24,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:28:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:28:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:28:25,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:28:25,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218365545] [2024-11-13 15:28:25,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218365545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:28:25,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778457694] [2024-11-13 15:28:25,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:28:25,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:28:25,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:28:25,602 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:28:25,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 15:28:25,961 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:28:25,962 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:28:25,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-13 15:28:25,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:28:26,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 15:28:26,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 15:28:26,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 15:28:26,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2024-11-13 15:28:26,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-11-13 15:28:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:28:26,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:28:26,272 INFO L349 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2024-11-13 15:28:26,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2024-11-13 15:28:26,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-13 15:28:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:28:26,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778457694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:28:26,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:28:26,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-13 15:28:26,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537146862] [2024-11-13 15:28:26,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:28:26,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:28:26,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:28:26,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:28:26,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:28:26,319 INFO L87 Difference]: Start difference. First operand 502 states and 620 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 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) [2024-11-13 15:28:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:28:26,896 INFO L93 Difference]: Finished difference Result 1148 states and 1457 transitions. [2024-11-13 15:28:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:28:26,897 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 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 48 [2024-11-13 15:28:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:28:26,900 INFO L225 Difference]: With dead ends: 1148 [2024-11-13 15:28:26,900 INFO L226 Difference]: Without dead ends: 731 [2024-11-13 15:28:26,901 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:28:26,902 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 74 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:28:26,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 198 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:28:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2024-11-13 15:28:27,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 657. [2024-11-13 15:28:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 1.2469512195121952) internal successors, (818), 656 states have internal predecessors, (818), 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) [2024-11-13 15:28:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 818 transitions. [2024-11-13 15:28:27,021 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 818 transitions. Word has length 48 [2024-11-13 15:28:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:28:27,022 INFO L471 AbstractCegarLoop]: Abstraction has 657 states and 818 transitions. [2024-11-13 15:28:27,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 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) [2024-11-13 15:28:27,022 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 818 transitions. [2024-11-13 15:28:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 15:28:27,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:28:27,023 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:28:27,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 15:28:27,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-13 15:28:27,224 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:28:27,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:28:27,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1666461079, now seen corresponding path program 3 times [2024-11-13 15:28:27,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:28:27,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406536645] [2024-11-13 15:28:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:28:27,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:28:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:28:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:28:29,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:28:29,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406536645] [2024-11-13 15:28:29,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406536645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:28:29,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866195232] [2024-11-13 15:28:29,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:28:29,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:28:29,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:28:29,060 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:28:29,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 15:28:29,495 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 15:28:29,496 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:28:29,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-13 15:28:29,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:28:29,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:28:29,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:28:29,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:28:29,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-11-13 15:28:30,053 INFO L349 Elim1Store]: treesize reduction 41, result has 37.9 percent of original size [2024-11-13 15:28:30,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 43 [2024-11-13 15:28:30,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2024-11-13 15:28:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:28:30,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:28:30,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-13 15:28:30,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:28:30,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 6 [2024-11-13 15:28:30,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-11-13 15:28:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:28:31,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866195232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:28:31,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:28:31,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 29 [2024-11-13 15:28:31,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479860536] [2024-11-13 15:28:31,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:28:31,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 15:28:31,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:28:31,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 15:28:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2024-11-13 15:28:31,031 INFO L87 Difference]: Start difference. First operand 657 states and 818 transitions. Second operand has 29 states, 29 states have (on average 4.551724137931035) internal successors, (132), 29 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:28:35,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:28:40,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:28:44,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:28:52,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:28:57,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:28:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:28:57,931 INFO L93 Difference]: Finished difference Result 1703 states and 2114 transitions. [2024-11-13 15:28:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-13 15:28:57,932 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.551724137931035) internal successors, (132), 29 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-13 15:28:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:28:57,935 INFO L225 Difference]: With dead ends: 1703 [2024-11-13 15:28:57,935 INFO L226 Difference]: Without dead ends: 1129 [2024-11-13 15:28:57,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2809 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1090, Invalid=8030, Unknown=0, NotChecked=0, Total=9120 [2024-11-13 15:28:57,939 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 301 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 31 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:28:57,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 988 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1323 Invalid, 5 Unknown, 0 Unchecked, 22.6s Time] [2024-11-13 15:28:57,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2024-11-13 15:28:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 954. [2024-11-13 15:28:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 1.2350472193074502) internal successors, (1177), 953 states have internal predecessors, (1177), 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) [2024-11-13 15:28:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1177 transitions. [2024-11-13 15:28:58,120 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1177 transitions. Word has length 48 [2024-11-13 15:28:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:28:58,121 INFO L471 AbstractCegarLoop]: Abstraction has 954 states and 1177 transitions. [2024-11-13 15:28:58,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.551724137931035) internal successors, (132), 29 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:28:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1177 transitions. [2024-11-13 15:28:58,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 15:28:58,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:28:58,122 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:28:58,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 15:28:58,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 15:28:58,326 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:28:58,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:28:58,326 INFO L85 PathProgramCache]: Analyzing trace with hash 420718528, now seen corresponding path program 1 times [2024-11-13 15:28:58,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:28:58,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692780141] [2024-11-13 15:28:58,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:28:58,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:28:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:28:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:28:59,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:28:59,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692780141] [2024-11-13 15:28:59,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692780141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:28:59,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535790710] [2024-11-13 15:28:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:28:59,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:28:59,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:28:59,571 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:28:59,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 15:28:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:28:59,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-13 15:28:59,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:29:00,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:29:00,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:29:00,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 1 [2024-11-13 15:29:00,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-11-13 15:29:00,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2024-11-13 15:29:00,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:29:00,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:29:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:29:00,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:29:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:29:00,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535790710] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:29:00,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:29:00,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2024-11-13 15:29:00,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046985938] [2024-11-13 15:29:00,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:29:00,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 15:29:00,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:00,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 15:29:00,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-13 15:29:00,716 INFO L87 Difference]: Start difference. First operand 954 states and 1177 transitions. Second operand has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 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) [2024-11-13 15:29:02,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:02,271 INFO L93 Difference]: Finished difference Result 1162 states and 1432 transitions. [2024-11-13 15:29:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 15:29:02,272 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 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 49 [2024-11-13 15:29:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:02,276 INFO L225 Difference]: With dead ends: 1162 [2024-11-13 15:29:02,276 INFO L226 Difference]: Without dead ends: 1160 [2024-11-13 15:29:02,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=256, Invalid=1076, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 15:29:02,279 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 165 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:02,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 507 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 15:29:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2024-11-13 15:29:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1011. [2024-11-13 15:29:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 1.2386138613861386) internal successors, (1251), 1010 states have internal predecessors, (1251), 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) [2024-11-13 15:29:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1251 transitions. [2024-11-13 15:29:02,425 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1251 transitions. Word has length 49 [2024-11-13 15:29:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:02,425 INFO L471 AbstractCegarLoop]: Abstraction has 1011 states and 1251 transitions. [2024-11-13 15:29:02,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 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) [2024-11-13 15:29:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1251 transitions. [2024-11-13 15:29:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 15:29:02,427 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:02,427 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:02,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 15:29:02,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 15:29:02,628 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:02,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:02,628 INFO L85 PathProgramCache]: Analyzing trace with hash -235199333, now seen corresponding path program 1 times [2024-11-13 15:29:02,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:02,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771758722] [2024-11-13 15:29:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:02,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:29:03,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:03,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771758722] [2024-11-13 15:29:03,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771758722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:29:03,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583091599] [2024-11-13 15:29:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:03,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:29:03,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:29:03,381 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:29:03,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 15:29:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:03,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-13 15:29:03,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:29:03,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:29:03,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:29:04,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:29:04,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2024-11-13 15:29:04,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-11-13 15:29:04,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:29:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:29:04,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:29:04,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-13 15:29:04,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:04,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 6 [2024-11-13 15:29:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:29:04,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583091599] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:29:04,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:29:04,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2024-11-13 15:29:04,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001769247] [2024-11-13 15:29:04,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:29:04,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 15:29:04,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:04,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 15:29:04,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:29:04,556 INFO L87 Difference]: Start difference. First operand 1011 states and 1251 transitions. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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) [2024-11-13 15:29:05,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:05,475 INFO L93 Difference]: Finished difference Result 1890 states and 2351 transitions. [2024-11-13 15:29:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 15:29:05,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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 [2024-11-13 15:29:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:05,481 INFO L225 Difference]: With dead ends: 1890 [2024-11-13 15:29:05,481 INFO L226 Difference]: Without dead ends: 1106 [2024-11-13 15:29:05,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2024-11-13 15:29:05,483 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 147 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:05,483 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 483 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 15:29:05,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2024-11-13 15:29:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1088. [2024-11-13 15:29:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 1.234590616375345) internal successors, (1342), 1087 states have internal predecessors, (1342), 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) [2024-11-13 15:29:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1342 transitions. [2024-11-13 15:29:05,681 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1342 transitions. Word has length 50 [2024-11-13 15:29:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:05,681 INFO L471 AbstractCegarLoop]: Abstraction has 1088 states and 1342 transitions. [2024-11-13 15:29:05,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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) [2024-11-13 15:29:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1342 transitions. [2024-11-13 15:29:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 15:29:05,683 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:05,683 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:05,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 15:29:05,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:29:05,884 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:05,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash 982896735, now seen corresponding path program 2 times [2024-11-13 15:29:05,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:05,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724567313] [2024-11-13 15:29:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:05,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 15:29:05,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:05,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724567313] [2024-11-13 15:29:05,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724567313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:29:05,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275751316] [2024-11-13 15:29:05,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:29:05,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:29:05,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:29:05,993 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:29:05,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 15:29:06,501 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:29:06,501 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:29:06,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 15:29:06,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:29:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 15:29:06,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:29:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 15:29:06,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275751316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:29:06,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:29:06,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-11-13 15:29:06,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522055217] [2024-11-13 15:29:06,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:29:06,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:29:06,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:29:06,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:29:06,597 INFO L87 Difference]: Start difference. First operand 1088 states and 1342 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-11-13 15:29:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:06,774 INFO L93 Difference]: Finished difference Result 2057 states and 2548 transitions. [2024-11-13 15:29:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:29:06,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 52 [2024-11-13 15:29:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:06,777 INFO L225 Difference]: With dead ends: 2057 [2024-11-13 15:29:06,778 INFO L226 Difference]: Without dead ends: 1103 [2024-11-13 15:29:06,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:29:06,779 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:06,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 70 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:29:06,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2024-11-13 15:29:06,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1088. [2024-11-13 15:29:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 1.2244710211591536) internal successors, (1331), 1087 states have internal predecessors, (1331), 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) [2024-11-13 15:29:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1331 transitions. [2024-11-13 15:29:06,955 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1331 transitions. Word has length 52 [2024-11-13 15:29:06,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:06,955 INFO L471 AbstractCegarLoop]: Abstraction has 1088 states and 1331 transitions. [2024-11-13 15:29:06,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-11-13 15:29:06,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1331 transitions. [2024-11-13 15:29:06,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 15:29:06,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:06,957 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:06,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 15:29:07,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 15:29:07,158 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:07,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:07,158 INFO L85 PathProgramCache]: Analyzing trace with hash 915008580, now seen corresponding path program 2 times [2024-11-13 15:29:07,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:07,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644598297] [2024-11-13 15:29:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:07,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:29:09,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:09,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644598297] [2024-11-13 15:29:09,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644598297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:29:09,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959505940] [2024-11-13 15:29:09,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:29:09,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:29:09,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:29:09,308 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:29:09,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 15:29:09,765 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:29:09,766 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:29:09,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-13 15:29:09,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:29:09,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:29:09,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 15:29:10,090 INFO L349 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2024-11-13 15:29:10,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2024-11-13 15:29:10,126 INFO L349 Elim1Store]: treesize reduction 34, result has 43.3 percent of original size [2024-11-13 15:29:10,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2024-11-13 15:29:10,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 112 [2024-11-13 15:29:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:29:11,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:29:11,502 INFO L349 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2024-11-13 15:29:11,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 94 [2024-11-13 15:29:11,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:11,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2024-11-13 15:29:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:29:11,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959505940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:29:11,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:29:11,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 27 [2024-11-13 15:29:11,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808748895] [2024-11-13 15:29:11,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:29:11,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 15:29:11,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:11,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 15:29:11,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-11-13 15:29:11,852 INFO L87 Difference]: Start difference. First operand 1088 states and 1331 transitions. Second operand has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 27 states have internal predecessors, (119), 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) [2024-11-13 15:29:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:19,970 INFO L93 Difference]: Finished difference Result 3899 states and 4837 transitions. [2024-11-13 15:29:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-13 15:29:19,971 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 27 states have internal predecessors, (119), 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 52 [2024-11-13 15:29:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:19,978 INFO L225 Difference]: With dead ends: 3899 [2024-11-13 15:29:19,978 INFO L226 Difference]: Without dead ends: 2945 [2024-11-13 15:29:19,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2024-11-13 15:29:19,982 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 348 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:19,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 833 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-13 15:29:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2024-11-13 15:29:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2208. [2024-11-13 15:29:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 1.2478477571363842) internal successors, (2754), 2207 states have internal predecessors, (2754), 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) [2024-11-13 15:29:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 2754 transitions. [2024-11-13 15:29:20,401 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 2754 transitions. Word has length 52 [2024-11-13 15:29:20,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:20,401 INFO L471 AbstractCegarLoop]: Abstraction has 2208 states and 2754 transitions. [2024-11-13 15:29:20,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 27 states have internal predecessors, (119), 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) [2024-11-13 15:29:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 2754 transitions. [2024-11-13 15:29:20,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 15:29:20,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:20,402 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:20,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-13 15:29:20,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 15:29:20,603 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:20,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:20,604 INFO L85 PathProgramCache]: Analyzing trace with hash 396090721, now seen corresponding path program 3 times [2024-11-13 15:29:20,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:20,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180853417] [2024-11-13 15:29:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:20,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:29:22,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:22,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180853417] [2024-11-13 15:29:22,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180853417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:29:22,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386363059] [2024-11-13 15:29:22,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:29:22,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:29:22,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:29:22,273 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:29:22,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 15:29:23,515 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 15:29:23,515 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:29:23,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 143 conjuncts are in the unsatisfiable core [2024-11-13 15:29:23,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:29:23,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:29:23,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 15:29:23,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-11-13 15:29:23,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 1 [2024-11-13 15:29:23,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:29:23,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:29:23,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 37 [2024-11-13 15:29:23,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:23,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2024-11-13 15:29:23,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:29:23,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:23,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-11-13 15:29:23,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:23,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2024-11-13 15:29:23,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 15:29:24,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 41 [2024-11-13 15:29:24,569 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 15:29:24,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 32 [2024-11-13 15:29:24,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:24,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-11-13 15:29:24,776 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-13 15:29:24,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 40 [2024-11-13 15:29:24,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2024-11-13 15:29:24,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2024-11-13 15:29:24,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:29:24,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:29:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:29:24,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:29:25,020 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 8))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_choose_next_~node~0#1.base|) .cse2)) (.cse1 (+ (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_choose_next_~node~0#1.base|) .cse2) 8))) (and (forall ((v_ArrVal_2574 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_2574) .cse0) .cse1) 0)) (forall ((v_ArrVal_2573 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_2573) .cse0) .cse1) 0))))) is different from false [2024-11-13 15:29:25,060 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse3 (+ 8 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)))) (let ((.cse1 (select (select |c_#memory_$Pointer$#1.base| .cse0) .cse3)) (.cse2 (+ (select (select |c_#memory_$Pointer$#1.offset| .cse0) .cse3) 8))) (and (forall ((v_ArrVal_2573 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_2573) .cse1) .cse2) 0)) (forall ((v_ArrVal_2574 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_2574) .cse1) .cse2) 0))))) is different from false [2024-11-13 15:29:25,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:25,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2024-11-13 15:29:25,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:25,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2024-11-13 15:29:26,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:26,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 144 [2024-11-13 15:29:26,708 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:26,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 116 [2024-11-13 15:29:26,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 141 [2024-11-13 15:29:26,721 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:29:26,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2024-11-13 15:29:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 14 not checked. [2024-11-13 15:29:26,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386363059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:29:26,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:29:26,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 13] total 31 [2024-11-13 15:29:26,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531928320] [2024-11-13 15:29:26,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:29:26,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 15:29:26,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:26,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 15:29:26,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=704, Unknown=9, NotChecked=110, Total=930 [2024-11-13 15:29:26,797 INFO L87 Difference]: Start difference. First operand 2208 states and 2754 transitions. Second operand has 31 states, 31 states have (on average 4.161290322580645) internal successors, (129), 31 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:30,950 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (+ 8 .cse1))) (let ((.cse4 (select (select |c_#memory_$Pointer$#1.base| .cse0) .cse2)) (.cse5 (+ (select (select |c_#memory_$Pointer$#1.offset| .cse0) .cse2) 8))) (let ((.cse3 (and (forall ((v_ArrVal_2573 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_2573) .cse4) .cse5) 0)) (forall ((v_ArrVal_2574 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_2574) .cse4) .cse5) 0))))) (and (or (not (= .cse0 0)) (< .cse1 1)) (forall ((v_arrayElimArr_20 (Array Int Int))) (or (forall ((v_arrayElimArr_21 (Array Int Int))) (or (not (= (select v_arrayElimArr_21 8) .cse1)) (forall ((v_ArrVal_2570 Int)) (or (not (= (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_2570 v_arrayElimArr_20) .cse0) .cse2) 0)) (< (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_2570 v_arrayElimArr_21) .cse0) .cse2) 0) (not (= (select |c_#valid| v_ArrVal_2570) 0)) (forall ((v_ArrVal_2573 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_2570 v_ArrVal_2573) .cse0) .cse2) 0)))))) (not (= (select v_arrayElimArr_20 8) .cse0)))) (or .cse3 (< |c_ULTIMATE.start_check_queue_~n~0#1.offset| 0) (not (= |c_ULTIMATE.start_check_queue_~n~0#1.base| 0))) (forall ((v_arrayElimArr_20 (Array Int Int))) (or (not (= (select v_arrayElimArr_20 8) .cse0)) (forall ((v_arrayElimArr_21 (Array Int Int))) (or (not (= (select v_arrayElimArr_21 8) .cse1)) (forall ((v_ArrVal_2570 Int)) (or (forall ((v_ArrVal_2574 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_2570 v_ArrVal_2574) .cse0) .cse2) 0)) (not (= (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_2570 v_arrayElimArr_20) .cse0) .cse2) 0)) (< (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_2570 v_arrayElimArr_21) .cse0) .cse2) 0) (not (= (select |c_#valid| v_ArrVal_2570) 0)))))))) (or (not (= (select (select |c_#memory_$Pointer$#1.base| .cse4) .cse5) 0)) .cse3 (< (select (select |c_#memory_$Pointer$#1.offset| .cse4) .cse5) 0))))))) is different from false [2024-11-13 15:29:31,632 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (+ 8 .cse0))) (let ((.cse3 (select (select |c_#memory_$Pointer$#1.base| .cse1) .cse2)) (.cse4 (+ (select (select |c_#memory_$Pointer$#1.offset| .cse1) .cse2) 8))) (and (forall ((v_arrayElimArr_20 (Array Int Int))) (or (forall ((v_arrayElimArr_21 (Array Int Int))) (or (not (= (select v_arrayElimArr_21 8) .cse0)) (forall ((v_ArrVal_2570 Int)) (or (not (= (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_2570 v_arrayElimArr_20) .cse1) .cse2) 0)) (< (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_2570 v_arrayElimArr_21) .cse1) .cse2) 0) (not (= (select |c_#valid| v_ArrVal_2570) 0)) (forall ((v_ArrVal_2573 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_2570 v_ArrVal_2573) .cse1) .cse2) 0)))))) (not (= (select v_arrayElimArr_20 8) .cse1)))) (forall ((v_ArrVal_2573 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.base| .cse1 v_ArrVal_2573) .cse3) .cse4) 0)) (forall ((v_arrayElimArr_20 (Array Int Int))) (or (not (= (select v_arrayElimArr_20 8) .cse1)) (forall ((v_arrayElimArr_21 (Array Int Int))) (or (not (= (select v_arrayElimArr_21 8) .cse0)) (forall ((v_ArrVal_2570 Int)) (or (forall ((v_ArrVal_2574 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_2570 v_ArrVal_2574) .cse1) .cse2) 0)) (not (= (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_2570 v_arrayElimArr_20) .cse1) .cse2) 0)) (< (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_2570 v_arrayElimArr_21) .cse1) .cse2) 0) (not (= (select |c_#valid| v_ArrVal_2570) 0)))))))) (forall ((v_ArrVal_2574 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| .cse1 v_ArrVal_2574) .cse3) .cse4) 0)))))) is different from false [2024-11-13 15:29:31,789 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse11 (+ 8 .cse4))) (let ((.cse6 (select (select |c_#memory_$Pointer$#1.base| .cse3) .cse11)) (.cse7 (+ (select (select |c_#memory_$Pointer$#1.offset| .cse3) .cse11) 8))) (let ((.cse10 (+ |c_ULTIMATE.start_check_queue_~n~0#1.offset| 8)) (.cse5 (forall ((v_ArrVal_2573 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.base| .cse3 v_ArrVal_2573) .cse6) .cse7) 0))) (.cse9 (forall ((v_ArrVal_2574 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| .cse3 v_ArrVal_2574) .cse6) .cse7) 0)))) (let ((.cse0 (and .cse5 .cse9)) (.cse1 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_check_queue_~n~0#1.base|) .cse10)) (.cse2 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_check_queue_~n~0#1.base|) .cse10))) (and (or .cse0 (not (= .cse1 0)) (< .cse2 0)) (or (not (= .cse3 0)) (< .cse4 1)) .cse5 (or .cse0 (< |c_ULTIMATE.start_check_queue_~n~0#1.offset| 0) (not (= |c_ULTIMATE.start_check_queue_~n~0#1.base| 0))) (or (not (= (select (select |c_#memory_$Pointer$#1.base| .cse6) .cse7) 0)) .cse0 (< (select (select |c_#memory_$Pointer$#1.offset| .cse6) .cse7) 0)) (let ((.cse8 (+ .cse2 8))) (or .cse0 (not (= (select (select |c_#memory_$Pointer$#1.base| .cse1) .cse8) 0)) (< (select (select |c_#memory_$Pointer$#1.offset| .cse1) .cse8) 0))) .cse9)))))) is different from false [2024-11-13 15:29:32,349 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse9 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse10 (+ 8 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)))) (let ((.cse4 (select (select |c_#memory_$Pointer$#1.base| .cse9) .cse10)) (.cse5 (+ (select (select |c_#memory_$Pointer$#1.offset| .cse9) .cse10) 8))) (let ((.cse8 (+ |c_ULTIMATE.start_check_queue_~n~0#1.offset| 8)) (.cse3 (forall ((v_ArrVal_2573 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.base| .cse9 v_ArrVal_2573) .cse4) .cse5) 0))) (.cse7 (forall ((v_ArrVal_2574 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| .cse9 v_ArrVal_2574) .cse4) .cse5) 0)))) (let ((.cse0 (and .cse3 .cse7)) (.cse1 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_check_queue_~n~0#1.base|) .cse8)) (.cse2 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_check_queue_~n~0#1.base|) .cse8))) (and (or .cse0 (not (= .cse1 0)) (< .cse2 0)) .cse3 (or .cse0 (< |c_ULTIMATE.start_check_queue_~n~0#1.offset| 0) (not (= |c_ULTIMATE.start_check_queue_~n~0#1.base| 0))) (or (not (= (select (select |c_#memory_$Pointer$#1.base| .cse4) .cse5) 0)) .cse0 (< (select (select |c_#memory_$Pointer$#1.offset| .cse4) .cse5) 0)) (let ((.cse6 (+ .cse2 8))) (or .cse0 (not (= (select (select |c_#memory_$Pointer$#1.base| .cse1) .cse6) 0)) (< (select (select |c_#memory_$Pointer$#1.offset| .cse1) .cse6) 0))) .cse7))))) is different from false [2024-11-13 15:29:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:33,168 INFO L93 Difference]: Finished difference Result 5370 states and 6683 transitions. [2024-11-13 15:29:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 15:29:33,169 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.161290322580645) internal successors, (129), 31 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-13 15:29:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:33,182 INFO L225 Difference]: With dead ends: 5370 [2024-11-13 15:29:33,182 INFO L226 Difference]: Without dead ends: 3296 [2024-11-13 15:29:33,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=457, Invalid=2623, Unknown=24, NotChecked=678, Total=3782 [2024-11-13 15:29:33,185 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 172 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 19 mSolverCounterUnsat, 50 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 50 IncrementalHoareTripleChecker+Unknown, 1099 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:33,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 807 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 734 Invalid, 50 Unknown, 1099 Unchecked, 3.1s Time] [2024-11-13 15:29:33,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2024-11-13 15:29:33,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 3167. [2024-11-13 15:29:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 3166 states have (on average 1.2419456727732154) internal successors, (3932), 3166 states have internal predecessors, (3932), 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) [2024-11-13 15:29:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 3932 transitions. [2024-11-13 15:29:33,789 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 3932 transitions. Word has length 52 [2024-11-13 15:29:33,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:33,789 INFO L471 AbstractCegarLoop]: Abstraction has 3167 states and 3932 transitions. [2024-11-13 15:29:33,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.161290322580645) internal successors, (129), 31 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:33,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 3932 transitions. [2024-11-13 15:29:33,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-13 15:29:33,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:33,790 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:29:33,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 15:29:33,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 15:29:33,991 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:33,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:33,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1771067708, now seen corresponding path program 3 times [2024-11-13 15:29:33,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:33,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914960156] [2024-11-13 15:29:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:33,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 49 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 15:29:36,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:36,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914960156] [2024-11-13 15:29:36,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914960156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:29:36,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520603127] [2024-11-13 15:29:36,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:29:36,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:29:36,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:29:36,259 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:29:36,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 15:29:37,264 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 15:29:37,264 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:29:37,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-13 15:29:37,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:29:37,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:29:37,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:29:37,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 15:29:37,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:29:37,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:29:37,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 33 [2024-11-13 15:29:37,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:37,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2024-11-13 15:29:37,716 INFO L349 Elim1Store]: treesize reduction 34, result has 46.0 percent of original size [2024-11-13 15:29:37,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 47 [2024-11-13 15:29:37,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 15:29:37,744 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2024-11-13 15:29:37,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2024-11-13 15:29:37,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:29:37,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:29:37,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2024-11-13 15:29:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:29:38,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:29:38,130 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:38,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2024-11-13 15:29:38,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:38,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2024-11-13 15:29:38,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 15:29:38,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 15:29:38,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:38,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2024-11-13 15:29:38,503 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:29:38,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-13 15:29:38,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:38,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-11-13 15:29:38,518 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:29:38,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 15:29:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:29:38,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520603127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:29:38,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:29:38,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 25 [2024-11-13 15:29:38,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949508272] [2024-11-13 15:29:38,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:29:38,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 15:29:38,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:29:38,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 15:29:38,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2024-11-13 15:29:38,638 INFO L87 Difference]: Start difference. First operand 3167 states and 3932 transitions. Second operand has 25 states, 25 states have (on average 5.36) internal successors, (134), 25 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:29:40,380 INFO L93 Difference]: Finished difference Result 6351 states and 7890 transitions. [2024-11-13 15:29:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:29:40,381 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 25 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-13 15:29:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:29:40,388 INFO L225 Difference]: With dead ends: 6351 [2024-11-13 15:29:40,388 INFO L226 Difference]: Without dead ends: 3344 [2024-11-13 15:29:40,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 15:29:40,391 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 101 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:29:40,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 545 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 15:29:40,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2024-11-13 15:29:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 3194. [2024-11-13 15:29:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3193 states have (on average 1.2361415596617602) internal successors, (3947), 3193 states have internal predecessors, (3947), 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) [2024-11-13 15:29:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 3947 transitions. [2024-11-13 15:29:40,866 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 3947 transitions. Word has length 58 [2024-11-13 15:29:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:29:40,866 INFO L471 AbstractCegarLoop]: Abstraction has 3194 states and 3947 transitions. [2024-11-13 15:29:40,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 25 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:29:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 3947 transitions. [2024-11-13 15:29:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-13 15:29:40,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:29:40,867 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1] [2024-11-13 15:29:40,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 15:29:41,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 15:29:41,067 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:29:41,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:29:41,068 INFO L85 PathProgramCache]: Analyzing trace with hash -978397440, now seen corresponding path program 7 times [2024-11-13 15:29:41,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:29:41,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209417740] [2024-11-13 15:29:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:29:41,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:29:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:29:46,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:29:46,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209417740] [2024-11-13 15:29:46,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209417740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:29:46,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165073772] [2024-11-13 15:29:46,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 15:29:46,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:29:46,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:29:46,685 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:29:46,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 15:29:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:29:47,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 231 conjuncts are in the unsatisfiable core [2024-11-13 15:29:47,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:29:47,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 15:29:47,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-13 15:29:47,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:29:47,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:29:47,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:29:47,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2024-11-13 15:29:47,305 INFO L349 Elim1Store]: treesize reduction 50, result has 37.5 percent of original size [2024-11-13 15:29:47,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 45 [2024-11-13 15:29:47,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-13 15:29:47,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:29:47,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:29:47,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:29:47,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-13 15:29:47,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 43 [2024-11-13 15:29:47,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:47,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2024-11-13 15:29:47,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:29:47,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:47,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2024-11-13 15:29:47,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 15:29:47,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:47,721 INFO L349 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2024-11-13 15:29:47,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 69 [2024-11-13 15:29:48,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 102 [2024-11-13 15:29:48,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:48,725 INFO L349 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2024-11-13 15:29:48,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 74 [2024-11-13 15:29:48,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:29:48,749 INFO L349 Elim1Store]: treesize reduction 53, result has 45.9 percent of original size [2024-11-13 15:29:48,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 51 [2024-11-13 15:29:48,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:48,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:48,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:48,780 INFO L349 Elim1Store]: treesize reduction 4, result has 85.7 percent of original size [2024-11-13 15:29:48,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 37 [2024-11-13 15:29:48,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:48,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:48,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:48,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 53 [2024-11-13 15:29:48,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 15:29:48,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:29:48,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 116 [2024-11-13 15:29:49,426 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2024-11-13 15:29:49,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 55 [2024-11-13 15:29:49,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-13 15:29:49,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:29:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 77 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:29:49,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:29:49,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:49,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 130 [2024-11-13 15:29:49,957 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:49,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 109 [2024-11-13 15:29:51,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:51,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 192 [2024-11-13 15:29:51,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:51,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 164 [2024-11-13 15:29:56,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:56,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 226 [2024-11-13 15:29:56,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:29:56,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 162 [2024-11-13 15:29:56,226 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:29:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:29:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:29:56,229 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:29:56,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:56,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:29:56,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 91 [2024-11-13 15:29:56,241 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:29:56,245 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:29:56,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 389 treesize of output 365 [2024-11-13 15:29:56,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 198 [2024-11-13 15:29:56,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2024-11-13 15:30:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 17 proven. 140 refuted. 38 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:30:04,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165073772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:30:04,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:30:04,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 16] total 49 [2024-11-13 15:30:04,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53896942] [2024-11-13 15:30:04,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:30:04,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-13 15:30:04,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:30:04,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-13 15:30:04,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2118, Unknown=3, NotChecked=0, Total=2352 [2024-11-13 15:30:04,939 INFO L87 Difference]: Start difference. First operand 3194 states and 3947 transitions. Second operand has 49 states, 49 states have (on average 3.693877551020408) internal successors, (181), 49 states have internal predecessors, (181), 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) [2024-11-13 15:30:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:30:12,680 INFO L93 Difference]: Finished difference Result 3644 states and 4497 transitions. [2024-11-13 15:30:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 15:30:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.693877551020408) internal successors, (181), 49 states have internal predecessors, (181), 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 65 [2024-11-13 15:30:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:30:12,692 INFO L225 Difference]: With dead ends: 3644 [2024-11-13 15:30:12,692 INFO L226 Difference]: Without dead ends: 3642 [2024-11-13 15:30:12,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=633, Invalid=4476, Unknown=3, NotChecked=0, Total=5112 [2024-11-13 15:30:12,694 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 253 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:30:12,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1372 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-13 15:30:12,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2024-11-13 15:30:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3335. [2024-11-13 15:30:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3335 states, 3334 states have (on average 1.2360527894421116) internal successors, (4121), 3334 states have internal predecessors, (4121), 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) [2024-11-13 15:30:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 4121 transitions. [2024-11-13 15:30:13,268 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 4121 transitions. Word has length 65 [2024-11-13 15:30:13,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:30:13,268 INFO L471 AbstractCegarLoop]: Abstraction has 3335 states and 4121 transitions. [2024-11-13 15:30:13,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.693877551020408) internal successors, (181), 49 states have internal predecessors, (181), 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) [2024-11-13 15:30:13,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 4121 transitions. [2024-11-13 15:30:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-13 15:30:13,270 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:30:13,270 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:30:13,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 15:30:13,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 15:30:13,471 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:30:13,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:30:13,471 INFO L85 PathProgramCache]: Analyzing trace with hash 749480753, now seen corresponding path program 4 times [2024-11-13 15:30:13,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:30:13,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135106386] [2024-11-13 15:30:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:30:13,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:30:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:30:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 73 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:30:15,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:30:15,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135106386] [2024-11-13 15:30:15,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135106386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:30:15,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760406747] [2024-11-13 15:30:15,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:30:15,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:30:15,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:30:15,087 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:30:15,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 15:30:15,650 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:30:15,650 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:30:15,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-13 15:30:15,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:30:15,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 15:30:15,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:30:15,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 15:30:15,809 INFO L349 Elim1Store]: treesize reduction 38, result has 36.7 percent of original size [2024-11-13 15:30:15,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 37 [2024-11-13 15:30:15,834 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-11-13 15:30:15,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-11-13 15:30:16,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2024-11-13 15:30:16,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2024-11-13 15:30:17,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 26 [2024-11-13 15:30:17,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 26 [2024-11-13 15:30:17,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 44 [2024-11-13 15:30:17,289 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-11-13 15:30:17,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 114 [2024-11-13 15:30:17,306 INFO L349 Elim1Store]: treesize reduction 49, result has 45.6 percent of original size [2024-11-13 15:30:17,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 63 [2024-11-13 15:30:17,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2024-11-13 15:30:17,380 INFO L349 Elim1Store]: treesize reduction 4, result has 96.1 percent of original size [2024-11-13 15:30:17,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 153 [2024-11-13 15:30:17,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2024-11-13 15:30:17,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2024-11-13 15:30:17,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 56 [2024-11-13 15:30:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 65 proven. 53 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 15:30:42,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:30:42,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:30:42,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 63 [2024-11-13 15:30:42,868 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:30:42,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2024-11-13 15:30:42,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-11-13 15:30:42,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-11-13 15:30:44,491 INFO L349 Elim1Store]: treesize reduction 33, result has 58.8 percent of original size [2024-11-13 15:30:44,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 178 [2024-11-13 15:30:44,628 INFO L349 Elim1Store]: treesize reduction 33, result has 58.8 percent of original size [2024-11-13 15:30:44,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 168 [2024-11-13 15:30:44,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:30:44,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 174 [2024-11-13 15:30:44,700 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:30:44,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 91 [2024-11-13 15:30:44,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:30:44,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 188 treesize of output 173 [2024-11-13 15:30:44,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:30:44,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 90 [2024-11-13 15:30:49,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-13 15:30:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 48 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:30:49,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760406747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:30:49,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:30:49,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 12] total 27 [2024-11-13 15:30:49,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271292649] [2024-11-13 15:30:49,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:30:49,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 15:30:49,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:30:49,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 15:30:49,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=561, Unknown=5, NotChecked=0, Total=702 [2024-11-13 15:30:49,427 INFO L87 Difference]: Start difference. First operand 3335 states and 4121 transitions. Second operand has 27 states, 27 states have (on average 6.148148148148148) internal successors, (166), 27 states have internal predecessors, (166), 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) [2024-11-13 15:31:02,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:31:04,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:31:04,048 INFO L93 Difference]: Finished difference Result 7853 states and 9713 transitions. [2024-11-13 15:31:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-13 15:31:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.148148148148148) internal successors, (166), 27 states have internal predecessors, (166), 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 67 [2024-11-13 15:31:04,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:31:04,063 INFO L225 Difference]: With dead ends: 7853 [2024-11-13 15:31:04,063 INFO L226 Difference]: Without dead ends: 4837 [2024-11-13 15:31:04,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=641, Invalid=2323, Unknown=6, NotChecked=0, Total=2970 [2024-11-13 15:31:04,068 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 238 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:31:04,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 870 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 637 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2024-11-13 15:31:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4837 states. [2024-11-13 15:31:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4837 to 3493. [2024-11-13 15:31:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3493 states, 3492 states have (on average 1.234249713631157) internal successors, (4310), 3492 states have internal predecessors, (4310), 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) [2024-11-13 15:31:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 4310 transitions. [2024-11-13 15:31:04,617 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 4310 transitions. Word has length 67 [2024-11-13 15:31:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:31:04,618 INFO L471 AbstractCegarLoop]: Abstraction has 3493 states and 4310 transitions. [2024-11-13 15:31:04,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.148148148148148) internal successors, (166), 27 states have internal predecessors, (166), 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) [2024-11-13 15:31:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 4310 transitions. [2024-11-13 15:31:04,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-13 15:31:04,619 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:31:04,619 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1] [2024-11-13 15:31:04,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-13 15:31:04,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 15:31:04,819 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:31:04,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:31:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1786153724, now seen corresponding path program 8 times [2024-11-13 15:31:04,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:31:04,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111168214] [2024-11-13 15:31:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:31:04,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:31:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:31:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 10 proven. 222 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:31:10,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:31:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111168214] [2024-11-13 15:31:10,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111168214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:31:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478098008] [2024-11-13 15:31:10,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:31:10,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:31:10,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:31:10,533 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:31:10,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 15:31:11,107 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:31:11,107 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:31:11,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 258 conjuncts are in the unsatisfiable core [2024-11-13 15:31:11,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:31:11,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-13 15:31:11,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 15:31:11,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-13 15:31:11,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:31:11,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:31:12,270 INFO L349 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2024-11-13 15:31:12,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 39 [2024-11-13 15:31:12,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:12,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2024-11-13 15:31:12,391 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-11-13 15:31:12,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 56 [2024-11-13 15:31:12,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:12,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2024-11-13 15:31:12,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:31:12,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:31:12,513 INFO L349 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2024-11-13 15:31:12,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2024-11-13 15:31:14,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 65 [2024-11-13 15:31:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:14,570 INFO L349 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2024-11-13 15:31:14,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 55 [2024-11-13 15:31:14,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:14,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:14,639 INFO L349 Elim1Store]: treesize reduction 62, result has 38.0 percent of original size [2024-11-13 15:31:14,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 69 [2024-11-13 15:31:14,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:31:14,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:14,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:14,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 53 [2024-11-13 15:31:14,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 15:31:14,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:31:17,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:31:17,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 113 [2024-11-13 15:31:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:17,321 INFO L349 Elim1Store]: treesize reduction 74, result has 12.9 percent of original size [2024-11-13 15:31:17,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 101 treesize of output 87 [2024-11-13 15:31:17,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:31:17,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:17,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:17,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:17,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:17,390 INFO L349 Elim1Store]: treesize reduction 4, result has 85.7 percent of original size [2024-11-13 15:31:17,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 37 [2024-11-13 15:31:17,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:17,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:17,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:17,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:31:17,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 79 [2024-11-13 15:31:17,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 15:31:17,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 127 [2024-11-13 15:31:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 16 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:31:19,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:31:20,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:31:20,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 257 [2024-11-13 15:31:20,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:31:20,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 208 [2024-11-13 15:31:23,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:31:23,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 438 treesize of output 378 [2024-11-13 15:31:23,475 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:31:23,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 368 treesize of output 308 [2024-11-13 15:31:44,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:31:44,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 902 treesize of output 814 [2024-11-13 15:31:44,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:31:44,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 804 treesize of output 716 [2024-11-13 15:33:23,500 WARN L286 SmtUtils]: Spent 17.81s on a formula simplification. DAG size of input: 2970 DAG size of output: 1 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-13 15:33:23,500 INFO L349 Elim1Store]: treesize reduction 70515, result has 0.0 percent of original size [2024-11-13 15:33:23,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 38 select indices, 38 select index equivalence classes, 0 disjoint index pairs (out of 703 index pairs), introduced 44 new quantified variables, introduced 703 case distinctions, treesize of input 7649955 treesize of output 1 [2024-11-13 15:33:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 31 proven. 175 refuted. 27 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:33:23,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478098008] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:33:23,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:33:23,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 57 [2024-11-13 15:33:23,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867398581] [2024-11-13 15:33:23,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:33:23,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-13 15:33:23,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:33:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-13 15:33:23,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=2748, Unknown=18, NotChecked=0, Total=3192 [2024-11-13 15:33:23,516 INFO L87 Difference]: Start difference. First operand 3493 states and 4310 transitions. Second operand has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 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) [2024-11-13 15:33:43,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-13 15:33:43,685 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-13 15:33:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:33:43,686 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 101.5s TimeCoverageRelationStatistics Valid=444, Invalid=2842, Unknown=20, NotChecked=0, Total=3306 [2024-11-13 15:33:43,687 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:43,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 149 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 15:33:43,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 15:33:43,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:43,889 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:912) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:786) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:374) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:373) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 47 more [2024-11-13 15:33:43,897 INFO L158 Benchmark]: Toolchain (without parser) took 400579.58ms. Allocated memory was 117.4MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 92.7MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 121.4MB. Max. memory is 16.1GB. [2024-11-13 15:33:43,897 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 167.8MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 15:33:43,898 INFO L158 Benchmark]: CACSL2BoogieTranslator took 496.46ms. Allocated memory is still 117.4MB. Free memory was 92.7MB in the beginning and 74.9MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 15:33:43,898 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.57ms. Allocated memory is still 117.4MB. Free memory was 74.9MB in the beginning and 73.1MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 15:33:43,898 INFO L158 Benchmark]: Boogie Preprocessor took 93.82ms. Allocated memory is still 117.4MB. Free memory was 73.1MB in the beginning and 70.7MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 15:33:43,898 INFO L158 Benchmark]: RCFGBuilder took 651.93ms. Allocated memory is still 117.4MB. Free memory was 70.7MB in the beginning and 54.6MB in the end (delta: 16.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 15:33:43,898 INFO L158 Benchmark]: TraceAbstraction took 399277.16ms. Allocated memory was 117.4MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 53.9MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 79.4MB. Max. memory is 16.1GB. [2024-11-13 15:33:43,900 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 167.8MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 496.46ms. Allocated memory is still 117.4MB. Free memory was 92.7MB in the beginning and 74.9MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.57ms. Allocated memory is still 117.4MB. Free memory was 74.9MB in the beginning and 73.1MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 93.82ms. Allocated memory is still 117.4MB. Free memory was 73.1MB in the beginning and 70.7MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 651.93ms. Allocated memory is still 117.4MB. Free memory was 70.7MB in the beginning and 54.6MB in the end (delta: 16.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 399277.16ms. Allocated memory was 117.4MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 53.9MB in the beginning and 1.5GB in the end (delta: -1.5GB). Peak memory consumption was 79.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-data/process_queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd --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 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:33:46,853 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:33:47,003 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-13 15:33:47,014 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:33:47,015 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:33:47,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:33:47,075 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:33:47,075 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:33:47,076 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:33:47,076 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:33:47,076 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:33:47,076 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:33:47,077 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:33:47,077 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:33:47,077 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:33:47,077 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:33:47,077 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 15:33:47,078 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:33:47,078 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:33:47,078 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:33:47,078 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 15:33:47,078 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:33:47,079 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 15:33:47,079 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 15:33:47,079 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 15:33:47,079 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:33:47,079 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 15:33:47,080 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:33:47,080 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 15:33:47,080 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:33:47,080 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:33:47,080 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:33:47,081 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:33:47,081 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:33:47,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:33:47,082 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:33:47,082 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:33:47,082 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 15:33:47,082 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-13 15:33:47,083 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 15:33:47,083 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:33:47,083 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:33:47,084 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:33:47,084 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:33:47,084 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_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd 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 -> 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c [2024-11-13 15:33:47,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:33:47,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:33:47,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:33:47,478 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:33:47,479 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:33:47,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/heap-data/process_queue.i Unable to find full path for "g++" [2024-11-13 15:33:49,864 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:33:50,329 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:33:50,331 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/sv-benchmarks/c/heap-data/process_queue.i [2024-11-13 15:33:50,355 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/data/359a2e461/9c4eed5b6ea145b98e9ebc1867c7289c/FLAG947ec2a7b [2024-11-13 15:33:50,452 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/data/359a2e461/9c4eed5b6ea145b98e9ebc1867c7289c [2024-11-13 15:33:50,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:33:50,459 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:33:50,462 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:33:50,463 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:33:50,469 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:33:50,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:33:50" (1/1) ... [2024-11-13 15:33:50,472 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e68dc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:50, skipping insertion in model container [2024-11-13 15:33:50,472 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:33:50" (1/1) ... [2024-11-13 15:33:50,526 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:33:51,036 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_20fe2850-6b37-49fa-8845-1d589a4e90ea/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2024-11-13 15:33:51,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:33:51,078 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:33:51,169 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_20fe2850-6b37-49fa-8845-1d589a4e90ea/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2024-11-13 15:33:51,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:33:51,226 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:33:51,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51 WrapperNode [2024-11-13 15:33:51,228 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:33:51,229 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:33:51,230 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:33:51,230 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:33:51,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (1/1) ... [2024-11-13 15:33:51,264 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (1/1) ... [2024-11-13 15:33:51,305 INFO L138 Inliner]: procedures = 130, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 109 [2024-11-13 15:33:51,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:33:51,311 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:33:51,311 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:33:51,311 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:33:51,324 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (1/1) ... [2024-11-13 15:33:51,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (1/1) ... [2024-11-13 15:33:51,335 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (1/1) ... [2024-11-13 15:33:51,366 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 13, 6]. 62 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 7 writes are split as follows [0, 5, 2]. [2024-11-13 15:33:51,366 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (1/1) ... [2024-11-13 15:33:51,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (1/1) ... [2024-11-13 15:33:51,385 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (1/1) ... [2024-11-13 15:33:51,390 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (1/1) ... [2024-11-13 15:33:51,393 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (1/1) ... [2024-11-13 15:33:51,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (1/1) ... [2024-11-13 15:33:51,399 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:33:51,400 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:33:51,400 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:33:51,401 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:33:51,403 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (1/1) ... [2024-11-13 15:33:51,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:33:51,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:51,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:33:51,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:33:51,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-13 15:33:51,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-13 15:33:51,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-13 15:33:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 15:33:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:33:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 15:33:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-13 15:33:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-13 15:33:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-13 15:33:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-13 15:33:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-13 15:33:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-13 15:33:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 15:33:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-13 15:33:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-13 15:33:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-11-13 15:33:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-13 15:33:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-13 15:33:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-13 15:33:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-13 15:33:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-13 15:33:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-13 15:33:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:33:51,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:33:51,692 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:33:51,695 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:33:52,532 INFO L? ?]: Removed 42 outVars from TransFormulas that were not future-live. [2024-11-13 15:33:52,533 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:33:52,544 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:33:52,545 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 15:33:52,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:33:52 BoogieIcfgContainer [2024-11-13 15:33:52,545 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:33:52,549 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:33:52,549 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:33:52,556 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:33:52,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:33:50" (1/3) ... [2024-11-13 15:33:52,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a09870f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:33:52, skipping insertion in model container [2024-11-13 15:33:52,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:33:51" (2/3) ... [2024-11-13 15:33:52,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a09870f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:33:52, skipping insertion in model container [2024-11-13 15:33:52,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:33:52" (3/3) ... [2024-11-13 15:33:52,559 INFO L112 eAbstractionObserver]: Analyzing ICFG process_queue.i [2024-11-13 15:33:52,576 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:33:52,578 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG process_queue.i that has 1 procedures, 27 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 15:33:52,649 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:33:52,669 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;@6e6d27e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:33:52,670 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 15:33:52,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 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) [2024-11-13 15:33:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 15:33:52,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:52,683 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:52,684 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:52,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:52,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1382220595, now seen corresponding path program 1 times [2024-11-13 15:33:52,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:33:52,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932277831] [2024-11-13 15:33:52,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:52,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:52,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:52,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:33:52,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:33:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:52,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 15:33:52,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:33:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:33:53,034 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:33:53,035 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:33:53,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932277831] [2024-11-13 15:33:53,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932277831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:53,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:33:53,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:33:53,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483009121] [2024-11-13 15:33:53,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:53,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:33:53,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:33:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:33:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:33:53,081 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-11-13 15:33:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:53,273 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2024-11-13 15:33:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:33:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2024-11-13 15:33:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:53,289 INFO L225 Difference]: With dead ends: 53 [2024-11-13 15:33:53,290 INFO L226 Difference]: Without dead ends: 24 [2024-11-13 15:33:53,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:33:53,297 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:53,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:33:53,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-13 15:33:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-13 15:33:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 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) [2024-11-13 15:33:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-11-13 15:33:53,342 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2024-11-13 15:33:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:53,343 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-11-13 15:33:53,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2024-11-13 15:33:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-11-13 15:33:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 15:33:53,345 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:53,345 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:53,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 15:33:53,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:53,546 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:53,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:53,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1529983955, now seen corresponding path program 1 times [2024-11-13 15:33:53,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:33:53,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437130534] [2024-11-13 15:33:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:53,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:53,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:53,550 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:33:53,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:33:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:53,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 15:33:53,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:33:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:33:53,790 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:33:53,790 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:33:53,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437130534] [2024-11-13 15:33:53,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437130534] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:53,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:33:53,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:33:53,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002884251] [2024-11-13 15:33:53,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:53,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:33:53,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:33:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:33:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:33:53,796 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-13 15:33:54,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:54,419 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2024-11-13 15:33:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:33:54,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2024-11-13 15:33:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:54,421 INFO L225 Difference]: With dead ends: 53 [2024-11-13 15:33:54,422 INFO L226 Difference]: Without dead ends: 31 [2024-11-13 15:33:54,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:33:54,423 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:54,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 68 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 15:33:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-13 15:33:54,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2024-11-13 15:33:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 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) [2024-11-13 15:33:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-11-13 15:33:54,429 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2024-11-13 15:33:54,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:54,429 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-11-13 15:33:54,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-13 15:33:54,430 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-11-13 15:33:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 15:33:54,430 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:54,430 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:54,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 15:33:54,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:54,631 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:54,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:54,632 INFO L85 PathProgramCache]: Analyzing trace with hash -392786767, now seen corresponding path program 1 times [2024-11-13 15:33:54,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:33:54,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752071522] [2024-11-13 15:33:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:54,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:54,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:54,636 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:33:54,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:33:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:54,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 15:33:54,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:33:54,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:33:55,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:33:55,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:33:55,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:33:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:33:55,177 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:33:55,177 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:33:55,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752071522] [2024-11-13 15:33:55,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752071522] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:55,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:33:55,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 15:33:55,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673058730] [2024-11-13 15:33:55,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:55,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:33:55,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:33:55,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:33:55,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:33:55,180 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2024-11-13 15:33:58,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:58,025 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2024-11-13 15:33:58,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:33:58,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 11 [2024-11-13 15:33:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:58,028 INFO L225 Difference]: With dead ends: 88 [2024-11-13 15:33:58,028 INFO L226 Difference]: Without dead ends: 63 [2024-11-13 15:33:58,028 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:33:58,029 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:58,029 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 112 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-13 15:33:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-13 15:33:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2024-11-13 15:33:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 55 states have internal predecessors, (73), 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) [2024-11-13 15:33:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2024-11-13 15:33:58,049 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 11 [2024-11-13 15:33:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:58,049 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2024-11-13 15:33:58,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2024-11-13 15:33:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2024-11-13 15:33:58,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 15:33:58,050 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:58,050 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:58,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 15:33:58,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:58,251 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:58,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:58,251 INFO L85 PathProgramCache]: Analyzing trace with hash -245023407, now seen corresponding path program 1 times [2024-11-13 15:33:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:33:58,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256081278] [2024-11-13 15:33:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:58,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:58,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:58,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:33:58,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:33:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:58,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:33:58,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:33:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:33:58,492 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:33:58,493 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:33:58,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256081278] [2024-11-13 15:33:58,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256081278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:33:58,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:33:58,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:33:58,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95052923] [2024-11-13 15:33:58,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:33:58,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:33:58,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:33:58,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:33:58,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:33:58,495 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-13 15:33:59,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:33:59,305 INFO L93 Difference]: Finished difference Result 108 states and 141 transitions. [2024-11-13 15:33:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:33:59,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2024-11-13 15:33:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:33:59,308 INFO L225 Difference]: With dead ends: 108 [2024-11-13 15:33:59,308 INFO L226 Difference]: Without dead ends: 54 [2024-11-13 15:33:59,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:33:59,310 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:33:59,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 79 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 15:33:59,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-13 15:33:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-13 15:33:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 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) [2024-11-13 15:33:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2024-11-13 15:33:59,325 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 11 [2024-11-13 15:33:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:33:59,325 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2024-11-13 15:33:59,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-13 15:33:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2024-11-13 15:33:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 15:33:59,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:33:59,326 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:33:59,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 15:33:59,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:59,527 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:33:59,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:33:59,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2015750733, now seen corresponding path program 1 times [2024-11-13 15:33:59,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:33:59,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326033840] [2024-11-13 15:33:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:33:59,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:33:59,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:33:59,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:33:59,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:33:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:33:59,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 15:33:59,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:33:59,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:33:59,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:33:59,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:33:59,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:33:59,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-11-13 15:34:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:00,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:00,266 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:00,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326033840] [2024-11-13 15:34:00,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326033840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:00,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:00,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-13 15:34:00,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342030971] [2024-11-13 15:34:00,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:00,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:34:00,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:00,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:34:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:34:00,268 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2024-11-13 15:34:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:02,972 INFO L93 Difference]: Finished difference Result 97 states and 127 transitions. [2024-11-13 15:34:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:34:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 14 [2024-11-13 15:34:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:02,974 INFO L225 Difference]: With dead ends: 97 [2024-11-13 15:34:02,975 INFO L226 Difference]: Without dead ends: 55 [2024-11-13 15:34:02,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:34:02,976 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 48 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:02,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 115 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-13 15:34:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-13 15:34:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-11-13 15:34:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 states have internal predecessors, (66), 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) [2024-11-13 15:34:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-11-13 15:34:02,986 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 14 [2024-11-13 15:34:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:02,986 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-11-13 15:34:02,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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) [2024-11-13 15:34:02,987 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-11-13 15:34:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-13 15:34:02,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:02,987 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:03,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 15:34:03,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:03,188 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:03,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1445741404, now seen corresponding path program 1 times [2024-11-13 15:34:03,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:03,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588478533] [2024-11-13 15:34:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:03,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:03,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:03,192 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:03,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:34:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:03,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:34:03,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:03,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:34:03,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 15:34:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:03,445 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:03,445 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:03,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588478533] [2024-11-13 15:34:03,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588478533] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:03,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:03,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:34:03,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308758621] [2024-11-13 15:34:03,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:03,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:34:03,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:03,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:34:03,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:34:03,448 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2024-11-13 15:34:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:03,959 INFO L93 Difference]: Finished difference Result 121 states and 154 transitions. [2024-11-13 15:34:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:34:03,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 20 [2024-11-13 15:34:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:03,961 INFO L225 Difference]: With dead ends: 121 [2024-11-13 15:34:03,961 INFO L226 Difference]: Without dead ends: 80 [2024-11-13 15:34:03,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:34:03,963 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:03,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 84 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 15:34:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-13 15:34:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2024-11-13 15:34:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 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) [2024-11-13 15:34:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2024-11-13 15:34:03,977 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 20 [2024-11-13 15:34:03,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:03,977 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2024-11-13 15:34:03,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2024-11-13 15:34:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2024-11-13 15:34:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-13 15:34:03,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:03,978 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:04,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 15:34:04,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:04,179 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:04,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:04,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1139984926, now seen corresponding path program 1 times [2024-11-13 15:34:04,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:04,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77522485] [2024-11-13 15:34:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:04,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:04,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:04,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:04,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 15:34:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:04,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-13 15:34:04,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:04,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:34:04,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:34:04,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:34:04,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:34:04,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:34:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:34:04,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:04,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-13 15:34:04,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:34:04,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 6 [2024-11-13 15:34:04,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-11-13 15:34:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:34:05,073 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:05,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77522485] [2024-11-13 15:34:05,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77522485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:05,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:05,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-13 15:34:05,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114164018] [2024-11-13 15:34:05,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:05,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:34:05,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:34:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:34:05,075 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2024-11-13 15:34:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:34:17,372 INFO L93 Difference]: Finished difference Result 390 states and 505 transitions. [2024-11-13 15:34:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 15:34:17,373 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 23 [2024-11-13 15:34:17,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:34:17,376 INFO L225 Difference]: With dead ends: 390 [2024-11-13 15:34:17,376 INFO L226 Difference]: Without dead ends: 320 [2024-11-13 15:34:17,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=340, Invalid=992, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 15:34:17,379 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 309 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:34:17,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 412 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2024-11-13 15:34:17,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-13 15:34:17,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 243. [2024-11-13 15:34:17,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.3016528925619835) internal successors, (315), 242 states have internal predecessors, (315), 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) [2024-11-13 15:34:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 315 transitions. [2024-11-13 15:34:17,417 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 315 transitions. Word has length 23 [2024-11-13 15:34:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:34:17,418 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 315 transitions. [2024-11-13 15:34:17,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2024-11-13 15:34:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 315 transitions. [2024-11-13 15:34:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-13 15:34:17,419 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:34:17,419 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:17,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 15:34:17,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:17,620 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:34:17,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash -980610334, now seen corresponding path program 2 times [2024-11-13 15:34:17,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:34:17,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674240064] [2024-11-13 15:34:17,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:34:17,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:17,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:17,624 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:17,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 15:34:18,212 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:34:18,212 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:34:18,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-13 15:34:18,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:18,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 11 [2024-11-13 15:34:18,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:34:18,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:34:18,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:34:18,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:34:18,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 26 [2024-11-13 15:34:18,737 INFO L349 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2024-11-13 15:34:18,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 35 [2024-11-13 15:34:18,783 INFO L349 Elim1Store]: treesize reduction 6, result has 72.7 percent of original size [2024-11-13 15:34:18,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-13 15:34:18,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:34:18,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:34:18,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2024-11-13 15:34:19,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-13 15:34:19,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:34:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:19,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:20,251 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:34:20,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2024-11-13 15:34:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:20,258 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:34:20,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674240064] [2024-11-13 15:34:20,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674240064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:20,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:34:20,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-11-13 15:34:20,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98861594] [2024-11-13 15:34:20,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:20,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 15:34:20,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:34:20,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 15:34:20,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:34:20,260 INFO L87 Difference]: Start difference. First operand 243 states and 315 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 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) [2024-11-13 15:34:40,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:34:45,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:34:49,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:34:52,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:34:54,009 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (bvsge (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_check_queue_~n~0#1.offset|))) (select (select |c_#memory_int#1| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_check_queue_~n~0#1.base|) .cse0)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_check_queue_~n~0#1.base|) .cse0)))) (_ bv1 32)) (forall ((v_ArrVal_272 (_ BitVec 32)) (v_ArrVal_278 (Array (_ BitVec 32) (_ BitVec 32)))) (or (bvsge (select (select (store |c_#memory_int#1| v_ArrVal_272 v_ArrVal_278) .cse1) (bvadd (_ bv4 32) .cse2)) (_ bv1 32)) (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_272))))) (bvsge (let ((.cse3 (bvadd (_ bv8 32) .cse2))) (select (select |c_#memory_int#1| (select (select |c_#memory_$Pointer$#1.base| .cse1) .cse3)) (bvadd (select (select |c_#memory_$Pointer$#1.offset| .cse1) .cse3) (_ bv4 32)))) (_ bv1 32)))) is different from false [2024-11-13 15:35:02,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:35:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:02,646 INFO L93 Difference]: Finished difference Result 442 states and 580 transitions. [2024-11-13 15:35:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 15:35:02,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 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 26 [2024-11-13 15:35:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:02,650 INFO L225 Difference]: With dead ends: 442 [2024-11-13 15:35:02,651 INFO L226 Difference]: Without dead ends: 440 [2024-11-13 15:35:02,652 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=240, Invalid=811, Unknown=9, NotChecked=62, Total=1122 [2024-11-13 15:35:02,652 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 178 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 2 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 32.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:02,653 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 315 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 332 Invalid, 24 Unknown, 15 Unchecked, 32.4s Time] [2024-11-13 15:35:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2024-11-13 15:35:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 406. [2024-11-13 15:35:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.3012345679012345) internal successors, (527), 405 states have internal predecessors, (527), 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) [2024-11-13 15:35:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 527 transitions. [2024-11-13 15:35:02,729 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 527 transitions. Word has length 26 [2024-11-13 15:35:02,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:02,730 INFO L471 AbstractCegarLoop]: Abstraction has 406 states and 527 transitions. [2024-11-13 15:35:02,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 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) [2024-11-13 15:35:02,730 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 527 transitions. [2024-11-13 15:35:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 15:35:02,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:02,735 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:02,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 15:35:02,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:02,935 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:02,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:02,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1008997858, now seen corresponding path program 3 times [2024-11-13 15:35:02,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:02,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481485399] [2024-11-13 15:35:02,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:35:02,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:02,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:02,938 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:02,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 15:35:07,623 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 15:35:07,623 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:35:07,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-13 15:35:07,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:07,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:07,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:07,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 11 [2024-11-13 15:35:07,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:07,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:35:08,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 35 [2024-11-13 15:35:08,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:35:08,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2024-11-13 15:35:08,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:35:08,132 INFO L349 Elim1Store]: treesize reduction 6, result has 72.7 percent of original size [2024-11-13 15:35:08,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-13 15:35:08,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2024-11-13 15:35:08,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 15:35:08,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:08,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2024-11-13 15:35:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:35:08,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:35:08,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:35:08,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2024-11-13 15:35:09,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:35:09,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 52 [2024-11-13 15:35:09,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 15:35:09,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-13 15:35:10,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:35:10,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2024-11-13 15:35:10,059 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:35:10,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-13 15:35:10,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:35:10,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-11-13 15:35:10,095 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:35:10,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 15:35:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:35:10,151 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:10,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481485399] [2024-11-13 15:35:10,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481485399] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:35:10,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:35:10,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2024-11-13 15:35:10,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920284194] [2024-11-13 15:35:10,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:35:10,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:35:10,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:10,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:35:10,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:35:10,154 INFO L87 Difference]: Start difference. First operand 406 states and 527 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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) [2024-11-13 15:35:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:19,894 INFO L93 Difference]: Finished difference Result 750 states and 982 transitions. [2024-11-13 15:35:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:35:19,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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 29 [2024-11-13 15:35:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:19,898 INFO L225 Difference]: With dead ends: 750 [2024-11-13 15:35:19,899 INFO L226 Difference]: Without dead ends: 406 [2024-11-13 15:35:19,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:35:19,901 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 40 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:19,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 347 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2024-11-13 15:35:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2024-11-13 15:35:19,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 402. [2024-11-13 15:35:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.28428927680798) internal successors, (515), 401 states have internal predecessors, (515), 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) [2024-11-13 15:35:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 515 transitions. [2024-11-13 15:35:19,960 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 515 transitions. Word has length 29 [2024-11-13 15:35:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:19,961 INFO L471 AbstractCegarLoop]: Abstraction has 402 states and 515 transitions. [2024-11-13 15:35:19,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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) [2024-11-13 15:35:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 515 transitions. [2024-11-13 15:35:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 15:35:19,962 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:19,962 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:19,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 15:35:20,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:20,163 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:20,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1923670215, now seen corresponding path program 1 times [2024-11-13 15:35:20,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:20,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085483699] [2024-11-13 15:35:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:35:20,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:20,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:20,167 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:20,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 15:35:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:35:20,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 15:35:20,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:35:20,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:35:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:35:20,537 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:20,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085483699] [2024-11-13 15:35:20,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085483699] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:35:20,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:35:20,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2024-11-13 15:35:20,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943930698] [2024-11-13 15:35:20,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:35:20,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 15:35:20,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:20,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 15:35:20,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-13 15:35:20,540 INFO L87 Difference]: Start difference. First operand 402 states and 515 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:35:23,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:23,092 INFO L93 Difference]: Finished difference Result 1326 states and 1732 transitions. [2024-11-13 15:35:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:35:23,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-13 15:35:23,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:23,097 INFO L225 Difference]: With dead ends: 1326 [2024-11-13 15:35:23,098 INFO L226 Difference]: Without dead ends: 963 [2024-11-13 15:35:23,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:35:23,100 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 114 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:23,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 157 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-13 15:35:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2024-11-13 15:35:23,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 859. [2024-11-13 15:35:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 1.2867132867132867) internal successors, (1104), 858 states have internal predecessors, (1104), 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) [2024-11-13 15:35:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1104 transitions. [2024-11-13 15:35:23,198 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1104 transitions. Word has length 30 [2024-11-13 15:35:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:23,199 INFO L471 AbstractCegarLoop]: Abstraction has 859 states and 1104 transitions. [2024-11-13 15:35:23,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:35:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1104 transitions. [2024-11-13 15:35:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 15:35:23,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:23,200 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:23,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 15:35:23,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:23,401 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:23,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:23,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1360179831, now seen corresponding path program 1 times [2024-11-13 15:35:23,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:23,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764695835] [2024-11-13 15:35:23,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:35:23,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:23,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:23,405 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:23,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 15:35:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:35:23,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-13 15:35:23,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:23,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:35:23,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:35:23,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:35:23,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:35:23,984 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:35:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:35:24,465 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:24,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764695835] [2024-11-13 15:35:24,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764695835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:35:24,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:35:24,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2024-11-13 15:35:24,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873309090] [2024-11-13 15:35:24,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:35:24,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:35:24,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:24,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:35:24,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:35:24,467 INFO L87 Difference]: Start difference. First operand 859 states and 1104 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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) [2024-11-13 15:35:31,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:31,741 INFO L93 Difference]: Finished difference Result 2160 states and 2806 transitions. [2024-11-13 15:35:31,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 15:35:31,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-13 15:35:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:31,750 INFO L225 Difference]: With dead ends: 2160 [2024-11-13 15:35:31,750 INFO L226 Difference]: Without dead ends: 1463 [2024-11-13 15:35:31,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2024-11-13 15:35:31,752 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 124 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:31,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 258 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2024-11-13 15:35:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2024-11-13 15:35:31,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1327. [2024-11-13 15:35:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 1.2895927601809956) internal successors, (1710), 1326 states have internal predecessors, (1710), 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) [2024-11-13 15:35:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1710 transitions. [2024-11-13 15:35:31,938 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1710 transitions. Word has length 30 [2024-11-13 15:35:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:31,938 INFO L471 AbstractCegarLoop]: Abstraction has 1327 states and 1710 transitions. [2024-11-13 15:35:31,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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) [2024-11-13 15:35:31,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1710 transitions. [2024-11-13 15:35:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 15:35:31,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:31,940 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:31,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 15:35:32,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:32,141 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:32,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1718529634, now seen corresponding path program 1 times [2024-11-13 15:35:32,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:32,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461871987] [2024-11-13 15:35:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:35:32,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:32,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:32,146 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:32,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 15:35:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:35:32,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 15:35:32,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:32,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-13 15:35:32,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-13 15:35:32,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-13 15:35:32,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-13 15:35:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:35:32,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:35:32,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-11-13 15:35:32,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:35:32,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:35:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:35:32,825 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:32,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461871987] [2024-11-13 15:35:32,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461871987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:35:32,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:35:32,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2024-11-13 15:35:32,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971074570] [2024-11-13 15:35:32,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:35:32,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:35:32,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:32,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:35:32,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:35:32,829 INFO L87 Difference]: Start difference. First operand 1327 states and 1710 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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) [2024-11-13 15:35:34,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:34,179 INFO L93 Difference]: Finished difference Result 2156 states and 2790 transitions. [2024-11-13 15:35:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:35:34,180 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 31 [2024-11-13 15:35:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:34,185 INFO L225 Difference]: With dead ends: 2156 [2024-11-13 15:35:34,185 INFO L226 Difference]: Without dead ends: 839 [2024-11-13 15:35:34,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:35:34,188 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:34,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 108 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 15:35:34,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2024-11-13 15:35:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 777. [2024-11-13 15:35:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.2809278350515463) internal successors, (994), 776 states have internal predecessors, (994), 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) [2024-11-13 15:35:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 994 transitions. [2024-11-13 15:35:34,289 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 994 transitions. Word has length 31 [2024-11-13 15:35:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:34,290 INFO L471 AbstractCegarLoop]: Abstraction has 777 states and 994 transitions. [2024-11-13 15:35:34,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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) [2024-11-13 15:35:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 994 transitions. [2024-11-13 15:35:34,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 15:35:34,291 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:34,291 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:34,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 15:35:34,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:34,491 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:34,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:34,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1325502624, now seen corresponding path program 1 times [2024-11-13 15:35:34,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:34,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782039068] [2024-11-13 15:35:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:35:34,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:34,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:34,494 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:34,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 15:35:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:35:34,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 15:35:34,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:35:34,704 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:35:34,704 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:34,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782039068] [2024-11-13 15:35:34,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782039068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:35:34,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:35:34,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:35:34,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050528600] [2024-11-13 15:35:34,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:35:34,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:35:34,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:34,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:35:34,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:35:34,706 INFO L87 Difference]: Start difference. First operand 777 states and 994 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:35:34,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:34,824 INFO L93 Difference]: Finished difference Result 1349 states and 1745 transitions. [2024-11-13 15:35:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:35:34,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-13 15:35:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:34,829 INFO L225 Difference]: With dead ends: 1349 [2024-11-13 15:35:34,829 INFO L226 Difference]: Without dead ends: 630 [2024-11-13 15:35:34,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:35:34,831 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:34,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 59 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:35:34,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2024-11-13 15:35:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 612. [2024-11-13 15:35:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 1.2962356792144025) internal successors, (792), 611 states have internal predecessors, (792), 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) [2024-11-13 15:35:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 792 transitions. [2024-11-13 15:35:34,902 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 792 transitions. Word has length 31 [2024-11-13 15:35:34,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:34,903 INFO L471 AbstractCegarLoop]: Abstraction has 612 states and 792 transitions. [2024-11-13 15:35:34,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:35:34,903 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 792 transitions. [2024-11-13 15:35:34,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 15:35:34,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:34,904 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:34,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 15:35:35,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:35,105 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:35,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:35,105 INFO L85 PathProgramCache]: Analyzing trace with hash 191150975, now seen corresponding path program 1 times [2024-11-13 15:35:35,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:35,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664498649] [2024-11-13 15:35:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:35:35,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:35,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:35,109 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:35,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 15:35:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:35:35,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-13 15:35:35,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:35,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:35,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:35,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:35:35,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:35,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-11-13 15:35:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:35:35,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:35:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:35:36,128 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:36,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664498649] [2024-11-13 15:35:36,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664498649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:35:36,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:35:36,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-13 15:35:36,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843675646] [2024-11-13 15:35:36,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:35:36,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:35:36,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:36,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:35:36,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:35:36,131 INFO L87 Difference]: Start difference. First operand 612 states and 792 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:35:39,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:39,826 INFO L93 Difference]: Finished difference Result 1140 states and 1483 transitions. [2024-11-13 15:35:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:35:39,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-13 15:35:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:39,831 INFO L225 Difference]: With dead ends: 1140 [2024-11-13 15:35:39,831 INFO L226 Difference]: Without dead ends: 618 [2024-11-13 15:35:39,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:35:39,833 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:39,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 143 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-13 15:35:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2024-11-13 15:35:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2024-11-13 15:35:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.293354943273906) internal successors, (798), 617 states have internal predecessors, (798), 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) [2024-11-13 15:35:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 798 transitions. [2024-11-13 15:35:39,901 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 798 transitions. Word has length 34 [2024-11-13 15:35:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:39,901 INFO L471 AbstractCegarLoop]: Abstraction has 618 states and 798 transitions. [2024-11-13 15:35:39,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:35:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 798 transitions. [2024-11-13 15:35:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 15:35:39,902 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:39,903 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:39,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 15:35:40,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:40,103 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:40,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:40,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1655180781, now seen corresponding path program 2 times [2024-11-13 15:35:40,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:40,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885034708] [2024-11-13 15:35:40,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:35:40,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:40,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:40,106 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:40,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 15:35:40,804 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:35:40,804 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:35:40,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-13 15:35:40,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:40,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:35:40,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:35:40,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:35:40,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:35:40,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:35:41,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:35:41,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:35:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:35:41,304 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:41,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885034708] [2024-11-13 15:35:41,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885034708] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:35:41,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:35:41,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2024-11-13 15:35:41,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421198690] [2024-11-13 15:35:41,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:35:41,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:35:41,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:41,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:35:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:35:41,305 INFO L87 Difference]: Start difference. First operand 618 states and 798 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 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) [2024-11-13 15:35:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:46,473 INFO L93 Difference]: Finished difference Result 1166 states and 1517 transitions. [2024-11-13 15:35:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 15:35:46,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 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 40 [2024-11-13 15:35:46,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:46,477 INFO L225 Difference]: With dead ends: 1166 [2024-11-13 15:35:46,477 INFO L226 Difference]: Without dead ends: 768 [2024-11-13 15:35:46,478 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2024-11-13 15:35:46,479 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 182 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:46,479 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 267 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-13 15:35:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2024-11-13 15:35:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 655. [2024-11-13 15:35:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 1.2767584097859328) internal successors, (835), 654 states have internal predecessors, (835), 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) [2024-11-13 15:35:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 835 transitions. [2024-11-13 15:35:46,552 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 835 transitions. Word has length 40 [2024-11-13 15:35:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:46,552 INFO L471 AbstractCegarLoop]: Abstraction has 655 states and 835 transitions. [2024-11-13 15:35:46,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 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) [2024-11-13 15:35:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 835 transitions. [2024-11-13 15:35:46,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 15:35:46,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:46,553 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2024-11-13 15:35:46,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 15:35:46,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:46,754 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:46,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash 910111955, now seen corresponding path program 4 times [2024-11-13 15:35:46,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:46,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980096030] [2024-11-13 15:35:46,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:35:46,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:46,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:46,758 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:46,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 15:35:47,036 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:35:47,037 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:35:47,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 15:35:47,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:47,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:35:47,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:35:47,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:35:47,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2024-11-13 15:35:47,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 15:35:47,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 15:35:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:35:47,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:35:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:35:47,466 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:47,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980096030] [2024-11-13 15:35:47,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980096030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:35:47,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:35:47,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-13 15:35:47,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310460438] [2024-11-13 15:35:47,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:35:47,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:35:47,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:47,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:35:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:35:47,468 INFO L87 Difference]: Start difference. First operand 655 states and 835 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) [2024-11-13 15:35:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:49,770 INFO L93 Difference]: Finished difference Result 1467 states and 1872 transitions. [2024-11-13 15:35:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:35:49,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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 41 [2024-11-13 15:35:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:49,774 INFO L225 Difference]: With dead ends: 1467 [2024-11-13 15:35:49,774 INFO L226 Difference]: Without dead ends: 850 [2024-11-13 15:35:49,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:35:49,776 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 49 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:49,776 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 238 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-13 15:35:49,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2024-11-13 15:35:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 733. [2024-11-13 15:35:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 1.25) internal successors, (915), 732 states have internal predecessors, (915), 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) [2024-11-13 15:35:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 915 transitions. [2024-11-13 15:35:49,872 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 915 transitions. Word has length 41 [2024-11-13 15:35:49,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:49,873 INFO L471 AbstractCegarLoop]: Abstraction has 733 states and 915 transitions. [2024-11-13 15:35:49,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) [2024-11-13 15:35:49,873 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 915 transitions. [2024-11-13 15:35:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 15:35:49,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:49,874 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:49,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 15:35:50,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:50,076 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:50,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:50,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1032789265, now seen corresponding path program 3 times [2024-11-13 15:35:50,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:50,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628152808] [2024-11-13 15:35:50,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:35:50,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:50,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:50,079 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:50,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 15:35:50,670 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 15:35:50,670 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:35:50,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 15:35:50,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:50,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:50,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-11-13 15:35:50,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:50,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:50,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-11-13 15:35:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 15:35:50,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:35:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 15:35:51,226 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:35:51,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628152808] [2024-11-13 15:35:51,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628152808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:35:51,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:35:51,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-13 15:35:51,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926975030] [2024-11-13 15:35:51,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:35:51,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 15:35:51,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:35:51,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 15:35:51,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 15:35:51,228 INFO L87 Difference]: Start difference. First operand 733 states and 915 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 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) [2024-11-13 15:35:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:35:54,621 INFO L93 Difference]: Finished difference Result 1607 states and 2017 transitions. [2024-11-13 15:35:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:35:54,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 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 43 [2024-11-13 15:35:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:35:54,625 INFO L225 Difference]: With dead ends: 1607 [2024-11-13 15:35:54,625 INFO L226 Difference]: Without dead ends: 945 [2024-11-13 15:35:54,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:35:54,627 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 72 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:35:54,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 181 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-13 15:35:54,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2024-11-13 15:35:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 827. [2024-11-13 15:35:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 1.24818401937046) internal successors, (1031), 826 states have internal predecessors, (1031), 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) [2024-11-13 15:35:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1031 transitions. [2024-11-13 15:35:54,728 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1031 transitions. Word has length 43 [2024-11-13 15:35:54,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:35:54,728 INFO L471 AbstractCegarLoop]: Abstraction has 827 states and 1031 transitions. [2024-11-13 15:35:54,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 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) [2024-11-13 15:35:54,729 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1031 transitions. [2024-11-13 15:35:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 15:35:54,730 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:35:54,730 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2024-11-13 15:35:54,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 15:35:54,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:54,931 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:35:54,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1805528621, now seen corresponding path program 5 times [2024-11-13 15:35:54,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:35:54,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900078573] [2024-11-13 15:35:54,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 15:35:54,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:35:54,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:35:54,935 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:35:54,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 15:35:58,561 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 15:35:58,561 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:35:58,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-13 15:35:58,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:35:58,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:35:58,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:35:58,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:35:58,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 11 [2024-11-13 15:35:59,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:35:59,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:35:59,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:35:59,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 15 [2024-11-13 15:35:59,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 26 [2024-11-13 15:35:59,157 INFO L349 Elim1Store]: treesize reduction 54, result has 37.2 percent of original size [2024-11-13 15:35:59,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 51 [2024-11-13 15:35:59,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:36:00,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 58 [2024-11-13 15:36:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:36:00,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2024-11-13 15:36:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:36:00,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2024-11-13 15:36:00,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 15:36:00,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:36:00,235 INFO L349 Elim1Store]: treesize reduction 45, result has 45.1 percent of original size [2024-11-13 15:36:00,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 43 [2024-11-13 15:36:00,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:36:00,290 INFO L349 Elim1Store]: treesize reduction 6, result has 76.9 percent of original size [2024-11-13 15:36:00,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2024-11-13 15:36:00,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:36:00,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 65 [2024-11-13 15:36:01,026 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 15:36:01,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2024-11-13 15:36:01,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:36:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:36:01,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:36:01,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:36:01,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 64 [2024-11-13 15:36:01,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:36:01,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 57 [2024-11-13 15:36:01,711 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (or (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_851))) (not (= .cse0 (select v_arrayElimArr_5 (_ bv8 32)))) (bvsge (let ((.cse1 (bvadd (_ bv8 32) .cse2))) (select (select (store |c_#memory_int#1| v_ArrVal_851 v_ArrVal_852) (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_851 v_arrayElimArr_5) .cse0) .cse1)) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_851 v_arrayElimArr_6) .cse0) .cse1)))) (_ bv1 32)) (not (= (select v_arrayElimArr_6 (_ bv8 32)) .cse2))))) is different from false [2024-11-13 15:36:02,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:36:02,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 66 [2024-11-13 15:36:02,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:36:02,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2024-11-13 15:36:02,374 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:36:02,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2024-11-13 15:36:02,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 54 [2024-11-13 15:36:02,397 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:36:02,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2024-11-13 15:36:05,001 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-13 15:36:05,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 1 [2024-11-13 15:36:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 39 not checked. [2024-11-13 15:36:05,002 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:36:05,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900078573] [2024-11-13 15:36:05,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900078573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:36:05,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:36:05,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2024-11-13 15:36:05,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301740160] [2024-11-13 15:36:05,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:36:05,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 15:36:05,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:36:05,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 15:36:05,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=390, Unknown=2, NotChecked=40, Total=506 [2024-11-13 15:36:05,004 INFO L87 Difference]: Start difference. First operand 827 states and 1031 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 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) [2024-11-13 15:36:28,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:36:53,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:36:56,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:36:57,623 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse5 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse8 (bvadd (_ bv4 32) .cse5)) (.cse7 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_check_queue_~n~0#1.base|) (_ bv8 32))) (.cse0 (select (select |c_#memory_$Pointer$#1.base| .cse3) (_ bv8 32)))) (let ((.cse2 (select (select |c_#memory_$Pointer$#1.base| .cse0) (_ bv8 32))) (.cse1 (select (select |c_#memory_$Pointer$#1.base| .cse7) (_ bv8 32))) (.cse6 (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimCell_66 (_ BitVec 32)) (v_ArrVal_851 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_arrayElimCell_66 (_ bv1 1)) v_ArrVal_851))) (not (= (_ bv0 1) (select |c_#valid| v_arrayElimCell_66))) (bvsge (select (select (store (store |c_#memory_int#1| v_arrayElimCell_66 v_ArrVal_840) v_ArrVal_851 v_ArrVal_852) .cse3) .cse8) (_ bv1 32)))))) (and (= (select (select |c_#memory_$Pointer$#1.offset| .cse0) (_ bv8 32)) (_ bv0 32)) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_check_queue_~n~0#1.base|) (_ bv8 32))) (= (select (select |c_#memory_int#1| .cse1) (_ bv4 32)) (_ bv1 32)) (not (= .cse0 .cse2)) (= (_ bv0 32) |c_ULTIMATE.start_check_queue_~n~0#1.offset|) (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_851))) (not (= .cse3 (select v_arrayElimArr_5 (_ bv8 32)))) (bvsge (let ((.cse4 (bvadd (_ bv8 32) .cse5))) (select (select (store |c_#memory_int#1| v_ArrVal_851 v_ArrVal_852) (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_851 v_arrayElimArr_5) .cse3) .cse4)) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_851 v_arrayElimArr_6) .cse3) .cse4)))) (_ bv1 32)) (not (= (select v_arrayElimArr_6 (_ bv8 32)) .cse5)))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#1.offset| .cse3) (_ bv8 32))) (not (= .cse3 .cse2)) (= (_ bv1 32) (select (select |c_#memory_int#1| .cse2) (_ bv4 32))) (not (= |c_ULTIMATE.start_check_queue_~n~0#1.base| .cse1)) (or .cse6 (not (bvsge (select (select |c_#memory_int#1| |c_ULTIMATE.start_check_queue_~n~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_check_queue_~n~0#1.offset|)) (_ bv1 32)))) (not (= .cse7 .cse1)) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#1.offset| .cse7) (_ bv8 32))) (= (_ bv0 32) .cse5) (or (not (bvsge (select (select |c_#memory_int#1| .cse3) .cse8) (_ bv1 32))) .cse6))))) is different from false [2024-11-13 15:36:57,698 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_check_queue_~n~0#1.base|) (_ bv8 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| .cse4) (_ bv8 32))) (.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse3 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (= (_ bv0 32) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_check_queue_~n~0#1.base|) (_ bv8 32))) (= (select (select |c_#memory_int#1| .cse0) (_ bv4 32)) (_ bv1 32)) (= (_ bv0 32) |c_ULTIMATE.start_check_queue_~n~0#1.offset|) (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_851))) (not (= .cse1 (select v_arrayElimArr_5 (_ bv8 32)))) (bvsge (let ((.cse2 (bvadd (_ bv8 32) .cse3))) (select (select (store |c_#memory_int#1| v_ArrVal_851 v_ArrVal_852) (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_851 v_arrayElimArr_5) .cse1) .cse2)) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_851 v_arrayElimArr_6) .cse1) .cse2)))) (_ bv1 32)) (not (= (select v_arrayElimArr_6 (_ bv8 32)) .cse3)))) (not (= |c_ULTIMATE.start_check_queue_~n~0#1.base| .cse0)) (not (= .cse4 .cse0)) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#1.offset| .cse4) (_ bv8 32))) (or (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimCell_66 (_ BitVec 32)) (v_ArrVal_851 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_arrayElimCell_66 (_ bv1 1)) v_ArrVal_851))) (not (= (_ bv0 1) (select |c_#valid| v_arrayElimCell_66))) (bvsge (select (select (store (store |c_#memory_int#1| v_arrayElimCell_66 v_ArrVal_840) v_ArrVal_851 v_ArrVal_852) .cse1) (bvadd (_ bv4 32) .cse3)) (_ bv1 32)))) (not (bvsge |c_ULTIMATE.start_check_queue_#t~mem11#1| (_ bv1 32))))))) is different from false [2024-11-13 15:36:58,004 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_check_queue_~n~0#1.base|) (_ bv8 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| .cse4) (_ bv8 32))) (.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse3 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (= (_ bv0 32) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_check_queue_~n~0#1.base|) (_ bv8 32))) (= (select (select |c_#memory_int#1| .cse0) (_ bv4 32)) (_ bv1 32)) (= (_ bv0 32) |c_ULTIMATE.start_check_queue_~n~0#1.offset|) (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_851))) (not (= .cse1 (select v_arrayElimArr_5 (_ bv8 32)))) (bvsge (let ((.cse2 (bvadd (_ bv8 32) .cse3))) (select (select (store |c_#memory_int#1| v_ArrVal_851 v_ArrVal_852) (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_851 v_arrayElimArr_5) .cse1) .cse2)) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_851 v_arrayElimArr_6) .cse1) .cse2)))) (_ bv1 32)) (not (= (select v_arrayElimArr_6 (_ bv8 32)) .cse3)))) (not (= |c_ULTIMATE.start_check_queue_~n~0#1.base| .cse0)) (not (= .cse4 .cse0)) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#1.offset| .cse4) (_ bv8 32))) (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimCell_66 (_ BitVec 32)) (v_ArrVal_851 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_arrayElimCell_66 (_ bv1 1)) v_ArrVal_851))) (not (= (_ bv0 1) (select |c_#valid| v_arrayElimCell_66))) (bvsge (select (select (store (store |c_#memory_int#1| v_arrayElimCell_66 v_ArrVal_840) v_ArrVal_851 v_ArrVal_852) .cse1) (bvadd (_ bv4 32) .cse3)) (_ bv1 32))))))) is different from false [2024-11-13 15:36:59,402 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse4 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (exists ((|v_ULTIMATE.start_check_queue_~n~0#1.base_75| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_check_queue_~n~0#1.base_75|) (_ bv8 32)))) (let ((.cse1 (select (select |c_#memory_$Pointer$#1.base| .cse0) (_ bv8 32)))) (and (= (_ bv0 32) (select (select |c_#memory_$Pointer$#1.offset| .cse0) (_ bv8 32))) (= (_ bv1 32) (select (select |c_#memory_int#1| .cse1) (_ bv4 32))) (not (= .cse0 .cse1)) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_check_queue_~n~0#1.base_75|) (_ bv8 32))) (not (= .cse1 |v_ULTIMATE.start_check_queue_~n~0#1.base_75|)) (= |c_ULTIMATE.start_check_queue_~n~0#1.base| .cse0))))) (= (_ bv0 32) |c_ULTIMATE.start_check_queue_~n~0#1.offset|) (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_851))) (not (= .cse2 (select v_arrayElimArr_5 (_ bv8 32)))) (bvsge (let ((.cse3 (bvadd (_ bv8 32) .cse4))) (select (select (store |c_#memory_int#1| v_ArrVal_851 v_ArrVal_852) (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_851 v_arrayElimArr_5) .cse2) .cse3)) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_851 v_arrayElimArr_6) .cse2) .cse3)))) (_ bv1 32)) (not (= (select v_arrayElimArr_6 (_ bv8 32)) .cse4)))) (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimCell_66 (_ BitVec 32)) (v_ArrVal_851 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_arrayElimCell_66 (_ bv1 1)) v_ArrVal_851))) (not (= (_ bv0 1) (select |c_#valid| v_arrayElimCell_66))) (bvsge (select (select (store (store |c_#memory_int#1| v_arrayElimCell_66 v_ArrVal_840) v_ArrVal_851 v_ArrVal_852) .cse2) (bvadd (_ bv4 32) .cse4)) (_ bv1 32)))))) is different from false [2024-11-13 15:37:03,646 WARN L851 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_check_queue_~n~0#1.base_75| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_check_queue_~n~0#1.base_75|) (_ bv8 32)))) (let ((.cse1 (select (select |c_#memory_$Pointer$#1.base| .cse0) (_ bv8 32)))) (and (= (_ bv0 32) (select (select |c_#memory_$Pointer$#1.offset| .cse0) (_ bv8 32))) (= (_ bv1 32) (select (select |c_#memory_int#1| .cse1) (_ bv4 32))) (not (= .cse0 .cse1)) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_check_queue_~n~0#1.base_75|) (_ bv8 32))) (not (= .cse1 |v_ULTIMATE.start_check_queue_~n~0#1.base_75|)) (= |c_ULTIMATE.start_check_queue_~n~0#1.base| .cse0))))) (= (_ bv0 32) |c_ULTIMATE.start_check_queue_~n~0#1.offset|) (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse4 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (or (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_851))) (not (= .cse2 (select v_arrayElimArr_5 (_ bv8 32)))) (bvsge (let ((.cse3 (bvadd (_ bv8 32) .cse4))) (select (select (store |c_#memory_int#1| v_ArrVal_851 v_ArrVal_852) (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_851 v_arrayElimArr_5) .cse2) .cse3)) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_851 v_arrayElimArr_6) .cse2) .cse3)))) (_ bv1 32)) (not (= (select v_arrayElimArr_6 (_ bv8 32)) .cse4)))))) is different from false [2024-11-13 15:37:04,051 WARN L851 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int#1| |c_ULTIMATE.start_check_queue_~n~0#1.base|) (_ bv4 32)) (_ bv1 32)) (= (_ bv0 32) |c_ULTIMATE.start_check_queue_~n~0#1.offset|) (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (or (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_851))) (not (= .cse0 (select v_arrayElimArr_5 (_ bv8 32)))) (bvsge (let ((.cse1 (bvadd (_ bv8 32) .cse2))) (select (select (store |c_#memory_int#1| v_ArrVal_851 v_ArrVal_852) (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_851 v_arrayElimArr_5) .cse0) .cse1)) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_851 v_arrayElimArr_6) .cse0) .cse1)))) (_ bv1 32)) (not (= (select v_arrayElimArr_6 (_ bv8 32)) .cse2)))))) is different from false [2024-11-13 15:37:04,084 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (or (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_851))) (not (= .cse0 (select v_arrayElimArr_5 (_ bv8 32)))) (bvsge (let ((.cse1 (bvadd (_ bv8 32) .cse2))) (select (select (store |c_#memory_int#1| v_ArrVal_851 v_ArrVal_852) (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_851 v_arrayElimArr_5) .cse0) .cse1)) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_851 v_arrayElimArr_6) .cse0) .cse1)))) (_ bv1 32)) (not (= (select v_arrayElimArr_6 (_ bv8 32)) .cse2))))) (= (_ bv1 32) |c_ULTIMATE.start_check_queue_#t~mem11#1|)) is different from false [2024-11-13 15:37:05,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:37:05,532 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_851))) (not (= .cse0 (select v_arrayElimArr_5 (_ bv8 32)))) (bvsge (let ((.cse1 (bvadd (_ bv8 32) .cse2))) (select (select (store |c_#memory_int#1| v_ArrVal_851 v_ArrVal_852) (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_851 v_arrayElimArr_5) .cse0) .cse1)) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_851 v_arrayElimArr_6) .cse0) .cse1)))) (_ bv1 32)) (not (= (select v_arrayElimArr_6 (_ bv8 32)) .cse2)))) (let ((.cse3 (bvadd (_ bv4 32) .cse2))) (or (not (bvsge (select (select |c_#memory_int#1| .cse0) .cse3) (_ bv1 32))) (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimCell_66 (_ BitVec 32)) (v_ArrVal_851 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_arrayElimCell_66 (_ bv1 1)) v_ArrVal_851))) (not (= (_ bv0 1) (select |c_#valid| v_arrayElimCell_66))) (bvsge (select (select (store (store |c_#memory_int#1| v_arrayElimCell_66 v_ArrVal_840) v_ArrVal_851 v_ArrVal_852) .cse0) .cse3) (_ bv1 32)))))))) is different from false [2024-11-13 15:37:05,752 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_851))) (not (= .cse0 (select v_arrayElimArr_5 (_ bv8 32)))) (bvsge (let ((.cse1 (bvadd (_ bv8 32) .cse2))) (select (select (store |c_#memory_int#1| v_ArrVal_851 v_ArrVal_852) (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_851 v_arrayElimArr_5) .cse0) .cse1)) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_851 v_arrayElimArr_6) .cse0) .cse1)))) (_ bv1 32)) (not (= (select v_arrayElimArr_6 (_ bv8 32)) .cse2)))) (or (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimCell_66 (_ BitVec 32)) (v_ArrVal_851 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_arrayElimCell_66 (_ bv1 1)) v_ArrVal_851))) (not (= (_ bv0 1) (select |c_#valid| v_arrayElimCell_66))) (bvsge (select (select (store (store |c_#memory_int#1| v_arrayElimCell_66 v_ArrVal_840) v_ArrVal_851 v_ArrVal_852) .cse0) (bvadd (_ bv4 32) .cse2)) (_ bv1 32)))) (not (bvsge (select (select |c_#memory_int#1| |c_ULTIMATE.start_check_queue_~n~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_check_queue_~n~0#1.offset|)) (_ bv1 32)))))) is different from false [2024-11-13 15:37:06,461 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_851))) (not (= .cse0 (select v_arrayElimArr_5 (_ bv8 32)))) (bvsge (let ((.cse1 (bvadd (_ bv8 32) .cse2))) (select (select (store |c_#memory_int#1| v_ArrVal_851 v_ArrVal_852) (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_851 v_arrayElimArr_5) .cse0) .cse1)) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_851 v_arrayElimArr_6) .cse0) .cse1)))) (_ bv1 32)) (not (= (select v_arrayElimArr_6 (_ bv8 32)) .cse2)))) (or (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimCell_66 (_ BitVec 32)) (v_ArrVal_851 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_arrayElimCell_66 (_ bv1 1)) v_ArrVal_851))) (not (= (_ bv0 1) (select |c_#valid| v_arrayElimCell_66))) (bvsge (select (select (store (store |c_#memory_int#1| v_arrayElimCell_66 v_ArrVal_840) v_ArrVal_851 v_ArrVal_852) .cse0) (bvadd (_ bv4 32) .cse2)) (_ bv1 32)))) (not (bvsge |c_ULTIMATE.start_check_queue_#t~mem11#1| (_ bv1 32)))))) is different from false [2024-11-13 15:37:07,238 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (forall ((v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| v_ArrVal_851))) (not (= .cse0 (select v_arrayElimArr_5 (_ bv8 32)))) (bvsge (let ((.cse1 (bvadd (_ bv8 32) .cse2))) (select (select (store |c_#memory_int#1| v_ArrVal_851 v_ArrVal_852) (select (select (store |c_#memory_$Pointer$#1.base| v_ArrVal_851 v_arrayElimArr_5) .cse0) .cse1)) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| v_ArrVal_851 v_arrayElimArr_6) .cse0) .cse1)))) (_ bv1 32)) (not (= (select v_arrayElimArr_6 (_ bv8 32)) .cse2)))) (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimCell_66 (_ BitVec 32)) (v_ArrVal_851 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_arrayElimCell_66 (_ bv1 1)) v_ArrVal_851))) (not (= (_ bv0 1) (select |c_#valid| v_arrayElimCell_66))) (bvsge (select (select (store (store |c_#memory_int#1| v_arrayElimCell_66 v_ArrVal_840) v_ArrVal_851 v_ArrVal_852) .cse0) (bvadd (_ bv4 32) .cse2)) (_ bv1 32)))))) is different from false [2024-11-13 15:37:11,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:37:15,375 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_852 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimCell_66 (_ BitVec 32)) (v_ArrVal_851 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_arrayElimCell_66 (_ bv1 1)) v_ArrVal_851))) (not (= (_ bv0 1) (select |c_#valid| v_arrayElimCell_66))) (bvsge (select (select (store (store |c_#memory_int#1| v_arrayElimCell_66 v_ArrVal_840) v_ArrVal_851 v_ArrVal_852) .cse0) (bvadd (_ bv4 32) .cse1)) (_ bv1 32)))) (bvsge (select (select |c_#memory_int#1| |c_ULTIMATE.start_check_queue_~n~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_check_queue_~n~0#1.offset|)) (_ bv1 32)) (bvsge (let ((.cse4 (bvadd (_ bv8 32) .cse1))) (let ((.cse2 (select (select |c_#memory_$Pointer$#1.base| .cse0) .cse4)) (.cse3 (bvadd (select (select |c_#memory_$Pointer$#1.offset| .cse0) .cse4) (_ bv8 32)))) (select (select |c_#memory_int#1| (select (select |c_#memory_$Pointer$#1.base| .cse2) .cse3)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#1.offset| .cse2) .cse3))))) (_ bv1 32)))) is different from false [2024-11-13 15:37:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:37:19,957 INFO L93 Difference]: Finished difference Result 1084 states and 1358 transitions. [2024-11-13 15:37:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-13 15:37:19,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 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 44 [2024-11-13 15:37:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:37:19,963 INFO L225 Difference]: With dead ends: 1084 [2024-11-13 15:37:19,963 INFO L226 Difference]: Without dead ends: 1082 [2024-11-13 15:37:19,964 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=260, Invalid=1136, Unknown=62, NotChecked=1092, Total=2550 [2024-11-13 15:37:19,964 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 107 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 2 mSolverCounterUnsat, 76 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 76 IncrementalHoareTripleChecker+Unknown, 723 IncrementalHoareTripleChecker+Unchecked, 34.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:37:19,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 387 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 403 Invalid, 76 Unknown, 723 Unchecked, 34.3s Time] [2024-11-13 15:37:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2024-11-13 15:37:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1054. [2024-11-13 15:37:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 1.2535612535612535) internal successors, (1320), 1053 states have internal predecessors, (1320), 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) [2024-11-13 15:37:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1320 transitions. [2024-11-13 15:37:20,111 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1320 transitions. Word has length 44 [2024-11-13 15:37:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:37:20,112 INFO L471 AbstractCegarLoop]: Abstraction has 1054 states and 1320 transitions. [2024-11-13 15:37:20,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 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) [2024-11-13 15:37:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1320 transitions. [2024-11-13 15:37:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 15:37:20,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:37:20,113 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2024-11-13 15:37:20,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 15:37:20,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:37:20,314 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:37:20,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:37:20,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1671177553, now seen corresponding path program 6 times [2024-11-13 15:37:20,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:37:20,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070414087] [2024-11-13 15:37:20,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 15:37:20,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:37:20,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:37:20,316 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:37:20,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 15:37:23,922 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-13 15:37:23,922 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:37:23,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-13 15:37:23,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:37:23,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 11 [2024-11-13 15:37:23,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:37:23,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:37:24,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:37:24,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:37:24,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:37:24,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2024-11-13 15:37:24,172 INFO L349 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2024-11-13 15:37:24,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 32 [2024-11-13 15:37:24,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 61 [2024-11-13 15:37:24,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:37:25,026 INFO L349 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2024-11-13 15:37:25,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 51 [2024-11-13 15:37:25,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-13 15:37:25,072 INFO L349 Elim1Store]: treesize reduction 59, result has 25.3 percent of original size [2024-11-13 15:37:25,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2024-11-13 15:37:25,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:37:25,110 INFO L349 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2024-11-13 15:37:25,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 53 [2024-11-13 15:37:25,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2024-11-13 15:37:25,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:37:25,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 64 [2024-11-13 15:37:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:37:26,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:37:26,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:37:26,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 125 [2024-11-13 15:37:26,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:37:26,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 104 [2024-11-13 15:37:38,828 INFO L349 Elim1Store]: treesize reduction 55, result has 36.0 percent of original size [2024-11-13 15:37:38,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 230 treesize of output 210 [2024-11-13 15:37:38,974 INFO L349 Elim1Store]: treesize reduction 55, result has 36.0 percent of original size [2024-11-13 15:37:38,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 186 treesize of output 166 [2024-11-13 15:37:39,726 INFO L349 Elim1Store]: treesize reduction 72, result has 41.0 percent of original size [2024-11-13 15:37:39,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 276 treesize of output 267 [2024-11-13 15:37:39,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:37:39,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 208 [2024-11-13 15:37:40,457 INFO L349 Elim1Store]: treesize reduction 163, result has 34.3 percent of original size [2024-11-13 15:37:40,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 459 treesize of output 463 [2024-11-13 15:37:40,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 228 [2024-11-13 15:37:40,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:37:40,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 197 [2024-11-13 15:37:40,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 194 [2024-11-13 15:37:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 71 refuted. 6 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:37:42,156 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:37:42,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070414087] [2024-11-13 15:37:42,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070414087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:37:42,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:37:42,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2024-11-13 15:37:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556927521] [2024-11-13 15:37:42,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:37:42,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 15:37:42,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:37:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 15:37:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=420, Unknown=8, NotChecked=0, Total=506 [2024-11-13 15:37:42,158 INFO L87 Difference]: Start difference. First operand 1054 states and 1320 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 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) [2024-11-13 15:37:44,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:37:47,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:37:57,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:38:10,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 15:38:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:38:12,891 INFO L93 Difference]: Finished difference Result 2958 states and 3768 transitions. [2024-11-13 15:38:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 15:38:12,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 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 47 [2024-11-13 15:38:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:38:12,896 INFO L225 Difference]: With dead ends: 2958 [2024-11-13 15:38:12,896 INFO L226 Difference]: Without dead ends: 2169 [2024-11-13 15:38:12,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=381, Invalid=1331, Unknown=10, NotChecked=0, Total=1722 [2024-11-13 15:38:12,898 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 313 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:38:12,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 702 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 22.7s Time] [2024-11-13 15:38:12,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2024-11-13 15:38:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1739. [2024-11-13 15:38:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1739 states, 1738 states have (on average 1.2629459148446491) internal successors, (2195), 1738 states have internal predecessors, (2195), 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) [2024-11-13 15:38:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 2195 transitions. [2024-11-13 15:38:13,171 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 2195 transitions. Word has length 47 [2024-11-13 15:38:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:38:13,171 INFO L471 AbstractCegarLoop]: Abstraction has 1739 states and 2195 transitions. [2024-11-13 15:38:13,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 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) [2024-11-13 15:38:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 2195 transitions. [2024-11-13 15:38:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 15:38:13,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:38:13,172 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:38:13,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 15:38:13,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:38:13,373 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:38:13,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:38:13,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1147543220, now seen corresponding path program 2 times [2024-11-13 15:38:13,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:38:13,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653899244] [2024-11-13 15:38:13,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:38:13,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:38:13,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:38:13,375 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:38:13,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 15:38:13,615 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:38:13,615 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:38:13,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 15:38:13,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:38:13,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:38:13,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:38:13,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2024-11-13 15:38:13,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:38:13,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-13 15:38:13,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-13 15:38:13,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 15:38:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:38:13,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:38:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:38:14,197 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:38:14,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653899244] [2024-11-13 15:38:14,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653899244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:38:14,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:38:14,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-13 15:38:14,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016618655] [2024-11-13 15:38:14,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:38:14,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:38:14,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:38:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:38:14,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:38:14,199 INFO L87 Difference]: Start difference. First operand 1739 states and 2195 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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) [2024-11-13 15:38:16,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:38:16,395 INFO L93 Difference]: Finished difference Result 3656 states and 4635 transitions. [2024-11-13 15:38:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:38:16,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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 48 [2024-11-13 15:38:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:38:16,399 INFO L225 Difference]: With dead ends: 3656 [2024-11-13 15:38:16,399 INFO L226 Difference]: Without dead ends: 1985 [2024-11-13 15:38:16,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:38:16,401 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 58 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:38:16,401 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 185 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-13 15:38:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2024-11-13 15:38:16,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1909. [2024-11-13 15:38:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1909 states, 1908 states have (on average 1.2589098532494758) internal successors, (2402), 1908 states have internal predecessors, (2402), 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) [2024-11-13 15:38:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 2402 transitions. [2024-11-13 15:38:16,765 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 2402 transitions. Word has length 48 [2024-11-13 15:38:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:38:16,765 INFO L471 AbstractCegarLoop]: Abstraction has 1909 states and 2402 transitions. [2024-11-13 15:38:16,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 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) [2024-11-13 15:38:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 2402 transitions. [2024-11-13 15:38:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 15:38:16,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:38:16,766 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:38:16,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 15:38:16,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:38:16,970 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:38:16,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:38:16,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1666461079, now seen corresponding path program 3 times [2024-11-13 15:38:16,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:38:16,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623923747] [2024-11-13 15:38:16,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:38:16,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:38:16,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:38:16,973 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:38:16,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 15:38:17,887 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 15:38:17,887 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:38:17,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-13 15:38:17,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:38:17,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 11 [2024-11-13 15:38:17,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:38:18,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:38:18,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2024-11-13 15:38:18,088 INFO L349 Elim1Store]: treesize reduction 6, result has 72.7 percent of original size [2024-11-13 15:38:18,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-13 15:38:18,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:38:18,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:38:18,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-11-13 15:38:18,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-11-13 15:38:18,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2024-11-13 15:38:18,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:38:18,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:38:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:38:18,924 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:38:19,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2024-11-13 15:38:19,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-13 15:38:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:38:20,572 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:38:20,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623923747] [2024-11-13 15:38:20,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623923747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:38:20,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:38:20,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2024-11-13 15:38:20,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254893342] [2024-11-13 15:38:20,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:38:20,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 15:38:20,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:38:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 15:38:20,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=297, Unknown=26, NotChecked=0, Total=380 [2024-11-13 15:38:20,579 INFO L87 Difference]: Start difference. First operand 1909 states and 2402 transitions. Second operand has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 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) [2024-11-13 15:38:41,628 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse7 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse6 (select |c_#memory_int#1| .cse2)) (.cse3 (bvadd (_ bv4 32) .cse7))) (let ((.cse1 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_choose_next_~node~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_choose_next_~node~0#1.offset|))) (.cse0 (select .cse6 .cse3))) (and (bvsge .cse0 (_ bv1 32)) (or (bvsge |c_ULTIMATE.start_main_~next_time~0#1| (_ bv1 32)) (not (bvsgt (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~next_time~0#1|) (_ bv1 32)))) (forall ((v_ArrVal_1100 (Array (_ BitVec 32) (_ BitVec 32)))) (bvsge (select (select (store |c_#memory_int#1| .cse1 v_ArrVal_1100) .cse2) .cse3) (_ bv1 32))) (forall ((v_ArrVal_1100 (Array (_ BitVec 32) (_ BitVec 32)))) (bvsge (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_choose_next_~node~0#1.base| (let ((.cse4 (select |c_#memory_int#1| |c_ULTIMATE.start_choose_next_~node~0#1.base|)) (.cse5 (bvadd (_ bv4 32) |c_ULTIMATE.start_choose_next_~node~0#1.offset|))) (store .cse4 .cse5 (bvadd (select .cse4 .cse5) (_ bv4294967295 32))))) .cse1 v_ArrVal_1100) .cse2) .cse3) (_ bv1 32))) (or (forall ((v_ArrVal_1100 (Array (_ BitVec 32) (_ BitVec 32)))) (bvsge (select (select (store (store |c_#memory_int#1| .cse2 (store .cse6 .cse3 (bvadd .cse0 (_ bv4294967295 32)))) (select (select |c_#memory_$Pointer$#1.base| .cse2) (bvadd (_ bv8 32) .cse7)) v_ArrVal_1100) .cse2) .cse3) (_ bv1 32))) (not (bvsgt |c_ULTIMATE.start_main_~next_time~0#1| (_ bv1 32)))) (or (and (or (forall ((|v_ULTIMATE.start_append_to_queue_~n#1.base_84| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_append_to_queue_~n#1.base_84|)))) (bvsge (bvadd |c_ULTIMATE.start_main_~next_time~0#1| (_ bv4294967295 32)) (_ bv1 32))) (not (= (_ bv0 1) (select |c_#valid| .cse2)))) (not (bvsgt (bvadd (_ bv1 32) |c_ULTIMATE.start_main_~next_time~0#1|) (_ bv1 32)))))))) is different from false [2024-11-13 15:38:45,253 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse5 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse3 (bvadd (_ bv4 32) .cse5)) (.cse2 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (and (or (bvsge |c_ULTIMATE.start_main_~next_time~0#1| (_ bv1 32)) (not (bvsgt (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~next_time~0#1|) (_ bv1 32)))) (forall ((v_ArrVal_1100 (Array (_ BitVec 32) (_ BitVec 32)))) (bvsge (select (select (store (store |c_#memory_int#1| |c_ULTIMATE.start_choose_next_~node~0#1.base| (let ((.cse0 (select |c_#memory_int#1| |c_ULTIMATE.start_choose_next_~node~0#1.base|)) (.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_choose_next_~node~0#1.offset|))) (store .cse0 .cse1 (bvadd (select .cse0 .cse1) (_ bv4294967295 32))))) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_choose_next_~node~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_choose_next_~node~0#1.offset|)) v_ArrVal_1100) .cse2) .cse3) (_ bv1 32))) (or (forall ((v_ArrVal_1100 (Array (_ BitVec 32) (_ BitVec 32)))) (bvsge (select (select (store (store |c_#memory_int#1| .cse2 (let ((.cse4 (select |c_#memory_int#1| .cse2))) (store .cse4 .cse3 (bvadd (select .cse4 .cse3) (_ bv4294967295 32))))) (select (select |c_#memory_$Pointer$#1.base| .cse2) (bvadd (_ bv8 32) .cse5)) v_ArrVal_1100) .cse2) .cse3) (_ bv1 32))) (not (bvsgt |c_ULTIMATE.start_main_~next_time~0#1| (_ bv1 32)))) (or (and (or (forall ((|v_ULTIMATE.start_append_to_queue_~n#1.base_84| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_append_to_queue_~n#1.base_84|)))) (bvsge (bvadd |c_ULTIMATE.start_main_~next_time~0#1| (_ bv4294967295 32)) (_ bv1 32))) (not (= (_ bv0 1) (select |c_#valid| .cse2)))) (not (bvsgt (bvadd (_ bv1 32) |c_ULTIMATE.start_main_~next_time~0#1|) (_ bv1 32))))))) is different from false [2024-11-13 15:38:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:38:53,177 INFO L93 Difference]: Finished difference Result 2438 states and 3083 transitions. [2024-11-13 15:38:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-13 15:38:53,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 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 48 [2024-11-13 15:38:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:38:53,185 INFO L225 Difference]: With dead ends: 2438 [2024-11-13 15:38:53,185 INFO L226 Difference]: Without dead ends: 2436 [2024-11-13 15:38:53,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=369, Invalid=1990, Unknown=99, NotChecked=194, Total=2652 [2024-11-13 15:38:53,187 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 193 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 7 mSolverCounterUnsat, 44 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 44 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 28.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:38:53,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 701 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 689 Invalid, 44 Unknown, 36 Unchecked, 28.4s Time] [2024-11-13 15:38:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2024-11-13 15:38:53,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2175. [2024-11-13 15:38:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 1.2612695492180312) internal successors, (2742), 2174 states have internal predecessors, (2742), 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) [2024-11-13 15:38:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 2742 transitions. [2024-11-13 15:38:53,515 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 2742 transitions. Word has length 48 [2024-11-13 15:38:53,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:38:53,516 INFO L471 AbstractCegarLoop]: Abstraction has 2175 states and 2742 transitions. [2024-11-13 15:38:53,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 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) [2024-11-13 15:38:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 2742 transitions. [2024-11-13 15:38:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 15:38:53,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:38:53,517 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:38:53,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 15:38:53,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:38:53,717 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:38:53,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:38:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash 113495598, now seen corresponding path program 2 times [2024-11-13 15:38:53,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:38:53,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773593626] [2024-11-13 15:38:53,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:38:53,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:38:53,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:38:53,720 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:38:53,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 15:38:54,007 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:38:54,007 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:38:54,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-13 15:38:54,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:38:54,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:38:54,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:38:54,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:38:54,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:38:54,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:38:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:38:54,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:38:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:38:54,780 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:38:54,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773593626] [2024-11-13 15:38:54,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773593626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:38:54,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:38:54,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-13 15:38:54,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438816463] [2024-11-13 15:38:54,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:38:54,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:38:54,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:38:54,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:38:54,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:38:54,782 INFO L87 Difference]: Start difference. First operand 2175 states and 2742 transitions. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 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) [2024-11-13 15:39:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:39:03,743 INFO L93 Difference]: Finished difference Result 3940 states and 4983 transitions. [2024-11-13 15:39:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 15:39:03,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 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 49 [2024-11-13 15:39:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:39:03,750 INFO L225 Difference]: With dead ends: 3940 [2024-11-13 15:39:03,750 INFO L226 Difference]: Without dead ends: 2432 [2024-11-13 15:39:03,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-11-13 15:39:03,753 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 84 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:39:03,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 307 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2024-11-13 15:39:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2024-11-13 15:39:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2418. [2024-11-13 15:39:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 1.256930078609847) internal successors, (3038), 2417 states have internal predecessors, (3038), 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) [2024-11-13 15:39:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 3038 transitions. [2024-11-13 15:39:04,103 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 3038 transitions. Word has length 49 [2024-11-13 15:39:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:39:04,103 INFO L471 AbstractCegarLoop]: Abstraction has 2418 states and 3038 transitions. [2024-11-13 15:39:04,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 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) [2024-11-13 15:39:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 3038 transitions. [2024-11-13 15:39:04,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 15:39:04,104 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:39:04,104 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:39:04,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 15:39:04,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:39:04,304 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:39:04,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:39:04,305 INFO L85 PathProgramCache]: Analyzing trace with hash 420718528, now seen corresponding path program 1 times [2024-11-13 15:39:04,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:39:04,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724526182] [2024-11-13 15:39:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:39:04,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:39:04,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:39:04,307 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:39:04,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 15:39:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:39:04,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-13 15:39:04,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:39:04,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:39:04,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:39:04,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:39:04,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:39:05,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-11-13 15:39:05,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2024-11-13 15:39:05,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:39:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:39:05,512 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:39:06,113 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1247 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= v_ArrVal_1247 (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_choose_next_~node~0#1.offset|))) (store (let ((.cse0 (select |c_#memory_int#1| |c_ULTIMATE.start_choose_next_~node~0#1.base|)) (.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_choose_next_~node~0#1.offset|))) (store .cse0 .cse1 (bvadd (select .cse0 .cse1) (_ bv4294967295 32)))) .cse2 (select v_ArrVal_1247 .cse2))))) (bvsge (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_1247) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (_ bv1 32)))) is different from false [2024-11-13 15:39:06,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-13 15:39:06,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:39:06,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 6 [2024-11-13 15:39:06,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2024-11-13 15:39:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2024-11-13 15:39:06,887 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:39:06,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724526182] [2024-11-13 15:39:06,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724526182] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:39:06,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:39:06,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2024-11-13 15:39:06,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765156207] [2024-11-13 15:39:06,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:39:06,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 15:39:06,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:39:06,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 15:39:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=456, Unknown=10, NotChecked=44, Total=600 [2024-11-13 15:39:06,889 INFO L87 Difference]: Start difference. First operand 2418 states and 3038 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 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) [2024-11-13 15:39:25,030 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvsge |c_ULTIMATE.start_main_~next_time~0#1| (_ bv1 32)))) (and (or (not .cse0) (bvsge (bvadd |c_ULTIMATE.start_main_~next_time~0#1| (_ bv4294967295 32)) (_ bv1 32))) (forall ((v_ArrVal_1247 (Array (_ BitVec 32) (_ BitVec 32)))) (or (bvsge (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_ArrVal_1247) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (_ bv1 32)) (not (= (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_choose_next_~node~0#1.offset|))) (store (select |c_#memory_int#1| |c_ULTIMATE.start_choose_next_~node~0#1.base|) .cse1 (select v_ArrVal_1247 .cse1))) v_ArrVal_1247)))) (or .cse0 (not (bvsge (bvadd (_ bv1 32) |c_ULTIMATE.start_main_~next_time~0#1|) (_ bv1 32)))))) is different from false [2024-11-13 15:39:30,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:39:30,359 INFO L93 Difference]: Finished difference Result 3182 states and 4007 transitions. [2024-11-13 15:39:30,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-13 15:39:30,361 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 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 49 [2024-11-13 15:39:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:39:30,367 INFO L225 Difference]: With dead ends: 3182 [2024-11-13 15:39:30,367 INFO L226 Difference]: Without dead ends: 3180 [2024-11-13 15:39:30,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=470, Invalid=2388, Unknown=12, NotChecked=210, Total=3080 [2024-11-13 15:39:30,368 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 222 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 20 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:39:30,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 761 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 680 Invalid, 22 Unknown, 299 Unchecked, 20.1s Time] [2024-11-13 15:39:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2024-11-13 15:39:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 2941. [2024-11-13 15:39:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2941 states, 2940 states have (on average 1.2642857142857142) internal successors, (3717), 2940 states have internal predecessors, (3717), 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) [2024-11-13 15:39:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2941 states to 2941 states and 3717 transitions. [2024-11-13 15:39:30,744 INFO L78 Accepts]: Start accepts. Automaton has 2941 states and 3717 transitions. Word has length 49 [2024-11-13 15:39:30,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:39:30,744 INFO L471 AbstractCegarLoop]: Abstraction has 2941 states and 3717 transitions. [2024-11-13 15:39:30,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 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) [2024-11-13 15:39:30,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2941 states and 3717 transitions. [2024-11-13 15:39:30,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 15:39:30,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:39:30,745 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:39:30,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 15:39:30,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:39:30,946 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:39:30,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:39:30,946 INFO L85 PathProgramCache]: Analyzing trace with hash -11119365, now seen corresponding path program 4 times [2024-11-13 15:39:30,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:39:30,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153787020] [2024-11-13 15:39:30,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 15:39:30,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:39:30,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:39:30,948 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:39:30,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 15:39:31,286 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 15:39:31,286 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:39:31,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-13 15:39:31,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:39:31,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 11 [2024-11-13 15:39:31,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:39:31,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:39:31,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 11 [2024-11-13 15:39:31,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:39:31,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:39:31,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:39:31,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 26 [2024-11-13 15:39:31,653 INFO L349 Elim1Store]: treesize reduction 6, result has 72.7 percent of original size [2024-11-13 15:39:31,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-13 15:39:31,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2024-11-13 15:39:32,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:39:32,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2024-11-13 15:39:32,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-13 15:39:32,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-13 15:39:32,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2024-11-13 15:39:32,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:39:32,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:39:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:39:32,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:39:32,715 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1332 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse1 (bvadd (_ bv8 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)))) (select (select (store |c_#memory_int#1| .cse0 v_ArrVal_1332) (select (select |c_#memory_$Pointer$#1.base| .cse0) .cse1)) (bvadd (select (select |c_#memory_$Pointer$#1.offset| .cse0) .cse1) (_ bv4 32)))) (_ bv1 32))) is different from false [2024-11-13 15:39:33,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:39:33,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 35 [2024-11-13 15:39:33,345 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:39:33,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 15:39:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 22 not checked. [2024-11-13 15:39:33,372 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:39:33,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153787020] [2024-11-13 15:39:33,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153787020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:39:33,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:39:33,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2024-11-13 15:39:33,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687226180] [2024-11-13 15:39:33,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:39:33,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:39:33,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:39:33,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:39:33,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=123, Unknown=7, NotChecked=22, Total=182 [2024-11-13 15:39:33,374 INFO L87 Difference]: Start difference. First operand 2941 states and 3717 transitions. Second operand has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:39:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:39:42,063 INFO L93 Difference]: Finished difference Result 4956 states and 6283 transitions. [2024-11-13 15:39:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:39:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-13 15:39:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:39:42,073 INFO L225 Difference]: With dead ends: 4956 [2024-11-13 15:39:42,073 INFO L226 Difference]: Without dead ends: 2925 [2024-11-13 15:39:42,074 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=243, Unknown=7, NotChecked=32, Total=342 [2024-11-13 15:39:42,075 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:39:42,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 257 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 193 Invalid, 0 Unknown, 48 Unchecked, 7.9s Time] [2024-11-13 15:39:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2024-11-13 15:39:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2924. [2024-11-13 15:39:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2923 states have (on average 1.263770099213137) internal successors, (3694), 2923 states have internal predecessors, (3694), 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) [2024-11-13 15:39:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 3694 transitions. [2024-11-13 15:39:42,445 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 3694 transitions. Word has length 51 [2024-11-13 15:39:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:39:42,445 INFO L471 AbstractCegarLoop]: Abstraction has 2924 states and 3694 transitions. [2024-11-13 15:39:42,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:39:42,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 3694 transitions. [2024-11-13 15:39:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 15:39:42,446 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:39:42,446 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:39:42,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 15:39:42,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:39:42,647 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:39:42,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:39:42,647 INFO L85 PathProgramCache]: Analyzing trace with hash 982896735, now seen corresponding path program 3 times [2024-11-13 15:39:42,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:39:42,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784080501] [2024-11-13 15:39:42,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 15:39:42,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:39:42,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:39:42,650 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:39:42,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 15:39:53,598 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 15:39:53,598 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:39:53,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 15:39:53,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:39:53,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:39:53,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 15:39:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:39:53,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:39:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:39:53,828 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:39:53,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784080501] [2024-11-13 15:39:53,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784080501] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:39:53,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:39:53,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2024-11-13 15:39:53,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854710467] [2024-11-13 15:39:53,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:39:53,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:39:53,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:39:53,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:39:53,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:39:53,830 INFO L87 Difference]: Start difference. First operand 2924 states and 3694 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:39:55,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:39:55,527 INFO L93 Difference]: Finished difference Result 5473 states and 6937 transitions. [2024-11-13 15:39:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:39:55,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-13 15:39:55,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:39:55,537 INFO L225 Difference]: With dead ends: 5473 [2024-11-13 15:39:55,537 INFO L226 Difference]: Without dead ends: 3012 [2024-11-13 15:39:55,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-13 15:39:55,540 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:39:55,540 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 129 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 15:39:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2024-11-13 15:39:55,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2973. [2024-11-13 15:39:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2972 states have (on average 1.2664872139973082) internal successors, (3764), 2972 states have internal predecessors, (3764), 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) [2024-11-13 15:39:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3764 transitions. [2024-11-13 15:39:55,927 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3764 transitions. Word has length 52 [2024-11-13 15:39:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:39:55,928 INFO L471 AbstractCegarLoop]: Abstraction has 2973 states and 3764 transitions. [2024-11-13 15:39:55,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:39:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3764 transitions. [2024-11-13 15:39:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 15:39:55,929 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:39:55,929 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:39:55,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-13 15:39:56,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:39:56,130 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:39:56,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:39:56,130 INFO L85 PathProgramCache]: Analyzing trace with hash 915008580, now seen corresponding path program 2 times [2024-11-13 15:39:56,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:39:56,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742524622] [2024-11-13 15:39:56,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:39:56,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:39:56,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:39:56,132 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:39:56,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20fe2850-6b37-49fa-8845-1d589a4e90ea/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 15:39:56,452 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:39:56,452 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:39:56,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-13 15:39:56,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:39:56,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 11 [2024-11-13 15:39:56,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:39:56,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:39:56,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:39:56,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:39:56,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 15:39:56,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2024-11-13 15:39:56,644 INFO L349 Elim1Store]: treesize reduction 6, result has 72.7 percent of original size [2024-11-13 15:39:56,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-13 15:39:57,387 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 15:39:57,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2024-11-13 15:39:57,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2024-11-13 15:39:57,826 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-11-13 15:39:57,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 40 [2024-11-13 15:39:57,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2024-11-13 15:39:58,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-13 15:39:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:39:58,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:40:02,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 198 [2024-11-13 15:40:02,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 261 treesize of output 233 [2024-11-13 15:40:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:40:02,964 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:40:02,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742524622] [2024-11-13 15:40:02,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742524622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:40:02,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:40:02,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2024-11-13 15:40:02,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825538100] [2024-11-13 15:40:02,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:40:02,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 15:40:02,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:40:02,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 15:40:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2024-11-13 15:40:02,966 INFO L87 Difference]: Start difference. First operand 2973 states and 3764 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 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) [2024-11-13 15:40:20,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]