./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested5-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5ad780effdbe313ff13ad5bc7233d50356fbf06f53a57c18cd85a4aa46126eb2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:17:54,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:17:54,975 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 23:17:54,990 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:17:54,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:17:55,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:17:55,049 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:17:55,050 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:17:55,050 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:17:55,051 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:17:55,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:17:55,053 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:17:55,053 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:17:55,053 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:17:55,053 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:17:55,053 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:17:55,054 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 23:17:55,054 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:17:55,054 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:17:55,054 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:17:55,055 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:17:55,055 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 23:17:55,056 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:17:55,056 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 23:17:55,056 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:17:55,056 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 23:17:55,056 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:17:55,057 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:17:55,057 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:17:55,057 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:17:55,058 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:17:55,058 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:17:55,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:17:55,059 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:17:55,059 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:17:55,059 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:17:55,059 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:17:55,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:17:55,060 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:17:55,060 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:17:55,060 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 23:17:55,060 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 23:17:55,060 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:17:55,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:17:55,061 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:17:55,062 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:17:55,062 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:17:55,062 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:17:55,062 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_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ad780effdbe313ff13ad5bc7233d50356fbf06f53a57c18cd85a4aa46126eb2 [2024-11-23 23:17:55,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:17:55,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:17:55,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:17:55,567 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:17:55,567 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:17:55,569 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/loops-crafted-1/nested5-2.c [2024-11-23 23:17:59,592 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/data/0dfa73898/9f518401cb2640608a4d566600230e73/FLAG9c8a0b28a [2024-11-23 23:18:00,003 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:18:00,003 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/sv-benchmarks/c/loops-crafted-1/nested5-2.c [2024-11-23 23:18:00,013 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/data/0dfa73898/9f518401cb2640608a4d566600230e73/FLAG9c8a0b28a [2024-11-23 23:18:00,037 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/data/0dfa73898/9f518401cb2640608a4d566600230e73 [2024-11-23 23:18:00,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:18:00,042 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:18:00,044 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:18:00,045 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:18:00,051 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:18:00,052 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,053 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f4e6b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00, skipping insertion in model container [2024-11-23 23:18:00,054 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,074 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:18:00,253 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_0fefbfdb-86fa-4fe3-a006-a801db5be657/sv-benchmarks/c/loops-crafted-1/nested5-2.c[321,334] [2024-11-23 23:18:00,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:18:00,291 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:18:00,305 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_0fefbfdb-86fa-4fe3-a006-a801db5be657/sv-benchmarks/c/loops-crafted-1/nested5-2.c[321,334] [2024-11-23 23:18:00,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:18:00,346 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:18:00,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00 WrapperNode [2024-11-23 23:18:00,347 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:18:00,348 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:18:00,348 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:18:00,349 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:18:00,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,379 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,403 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2024-11-23 23:18:00,403 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:18:00,405 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:18:00,407 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:18:00,407 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:18:00,418 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,421 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,442 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-23 23:18:00,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,449 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,459 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,466 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:18:00,471 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:18:00,471 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:18:00,471 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:18:00,472 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (1/1) ... [2024-11-23 23:18:00,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:18:00,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:18:00,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:18:00,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:18:00,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:18:00,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:18:00,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:18:00,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:18:00,647 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:18:00,650 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:18:00,911 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-23 23:18:00,912 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:18:00,930 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:18:00,931 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-23 23:18:00,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:18:00 BoogieIcfgContainer [2024-11-23 23:18:00,931 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:18:00,937 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:18:00,937 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:18:00,947 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:18:00,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:18:00" (1/3) ... [2024-11-23 23:18:00,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7708f1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:18:00, skipping insertion in model container [2024-11-23 23:18:00,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:18:00" (2/3) ... [2024-11-23 23:18:00,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7708f1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:18:00, skipping insertion in model container [2024-11-23 23:18:00,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:18:00" (3/3) ... [2024-11-23 23:18:00,951 INFO L128 eAbstractionObserver]: Analyzing ICFG nested5-2.c [2024-11-23 23:18:00,974 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:18:00,978 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG nested5-2.c that has 1 procedures, 24 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-23 23:18:01,065 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:18:01,087 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;@5c91f4bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:18:01,088 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-23 23:18:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:18:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-23 23:18:01,102 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:18:01,103 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:18:01,103 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:18:01,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:18:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1764071173, now seen corresponding path program 1 times [2024-11-23 23:18:01,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:18:01,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521559763] [2024-11-23 23:18:01,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:18:01,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:18:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:18:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:01,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:18:01,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521559763] [2024-11-23 23:18:01,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521559763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:18:01,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:18:01,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:18:01,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250046315] [2024-11-23 23:18:01,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:18:01,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:18:01,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:18:01,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:18:01,685 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:18:01,687 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2024-11-23 23:18:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:18:01,735 INFO L93 Difference]: Finished difference Result 48 states and 70 transitions. [2024-11-23 23:18:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:18:01,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 [2024-11-23 23:18:01,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:18:01,746 INFO L225 Difference]: With dead ends: 48 [2024-11-23 23:18:01,746 INFO L226 Difference]: Without dead ends: 22 [2024-11-23 23:18:01,752 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:18:01,756 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 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 [2024-11-23 23:18:01,757 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:18:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-23 23:18:01,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-11-23 23:18:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:18:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-23 23:18:01,796 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2024-11-23 23:18:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:18:01,797 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-23 23:18:01,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2024-11-23 23:18:01,798 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-23 23:18:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-23 23:18:01,798 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:18:01,798 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:18:01,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:18:01,800 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:18:01,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:18:01,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1178461247, now seen corresponding path program 1 times [2024-11-23 23:18:01,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:18:01,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117030968] [2024-11-23 23:18:01,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:18:01,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:18:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:18:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:02,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:18:02,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117030968] [2024-11-23 23:18:02,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117030968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:18:02,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064324105] [2024-11-23 23:18:02,133 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:18:02,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:18:02,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:18:02,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:18:02,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:18:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:18:02,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:18:02,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:18:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:02,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:18:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:02,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064324105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:18:02,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:18:02,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-23 23:18:02,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299933561] [2024-11-23 23:18:02,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:18:02,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:18:02,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:18:02,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:18:02,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:18:02,338 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:18:02,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:18:02,439 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-11-23 23:18:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:18:02,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-23 23:18:02,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:18:02,441 INFO L225 Difference]: With dead ends: 46 [2024-11-23 23:18:02,441 INFO L226 Difference]: Without dead ends: 27 [2024-11-23 23:18:02,441 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:18:02,443 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:18:02,443 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 79 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:18:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-23 23:18:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-23 23:18:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2024-11-23 23:18:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-23 23:18:02,449 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2024-11-23 23:18:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:18:02,449 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-23 23:18:02,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:18:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-23 23:18:02,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-23 23:18:02,450 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:18:02,450 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:18:02,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:18:02,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:18:02,651 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:18:02,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:18:02,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1101082613, now seen corresponding path program 2 times [2024-11-23 23:18:02,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:18:02,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416290656] [2024-11-23 23:18:02,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:18:02,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:18:02,693 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:18:02,693 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:18:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:03,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:18:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416290656] [2024-11-23 23:18:03,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416290656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:18:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785632832] [2024-11-23 23:18:03,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:18:03,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:18:03,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:18:03,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:18:03,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:18:03,233 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:18:03,234 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:18:03,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-23 23:18:03,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:18:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:03,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:18:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:03,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785632832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:18:03,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:18:03,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-11-23 23:18:03,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830593978] [2024-11-23 23:18:03,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:18:03,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:18:03,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:18:03,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:18:03,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:18:03,503 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:18:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:18:03,939 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2024-11-23 23:18:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:18:03,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-23 23:18:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:18:03,941 INFO L225 Difference]: With dead ends: 64 [2024-11-23 23:18:03,941 INFO L226 Difference]: Without dead ends: 39 [2024-11-23 23:18:03,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:18:03,943 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:18:03,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 230 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:18:03,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-23 23:18:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-23 23:18:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 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) [2024-11-23 23:18:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-23 23:18:03,962 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2024-11-23 23:18:03,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:18:03,962 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-23 23:18:03,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:18:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-23 23:18:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-23 23:18:03,965 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:18:03,965 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:18:03,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 23:18:04,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:18:04,170 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:18:04,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:18:04,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1109635933, now seen corresponding path program 3 times [2024-11-23 23:18:04,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:18:04,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425955418] [2024-11-23 23:18:04,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:18:04,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:18:04,276 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-23 23:18:04,276 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:18:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:04,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:18:04,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425955418] [2024-11-23 23:18:04,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425955418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:18:04,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841527904] [2024-11-23 23:18:04,785 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:18:04,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:18:04,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:18:04,788 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:18:04,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:18:04,878 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-23 23:18:04,878 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:18:04,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-23 23:18:04,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:18:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:05,002 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:18:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:05,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841527904] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:18:05,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:18:05,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-23 23:18:05,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678093796] [2024-11-23 23:18:05,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:18:05,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 23:18:05,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:18:05,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 23:18:05,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:18:05,631 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:18:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:18:10,250 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2024-11-23 23:18:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-23 23:18:10,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-23 23:18:10,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:18:10,252 INFO L225 Difference]: With dead ends: 100 [2024-11-23 23:18:10,252 INFO L226 Difference]: Without dead ends: 63 [2024-11-23 23:18:10,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2024-11-23 23:18:10,254 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:18:10,255 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 269 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 23:18:10,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-23 23:18:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-23 23:18:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 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) [2024-11-23 23:18:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2024-11-23 23:18:10,270 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 34 [2024-11-23 23:18:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:18:10,270 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2024-11-23 23:18:10,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:18:10,271 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2024-11-23 23:18:10,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-23 23:18:10,272 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:18:10,273 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:18:10,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 23:18:10,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:18:10,477 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:18:10,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:18:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash -113059373, now seen corresponding path program 4 times [2024-11-23 23:18:10,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:18:10,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566369769] [2024-11-23 23:18:10,478 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:18:10,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:18:10,532 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:18:10,534 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:18:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:11,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:18:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566369769] [2024-11-23 23:18:11,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566369769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:18:11,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626570490] [2024-11-23 23:18:11,761 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:18:11,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:18:11,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:18:11,764 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:18:11,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:18:11,891 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:18:11,891 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:18:11,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-23 23:18:11,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:18:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:12,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:18:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:18:14,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626570490] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:18:14,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:18:14,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-23 23:18:14,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743360984] [2024-11-23 23:18:14,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:18:14,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-23 23:18:14,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:18:14,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-23 23:18:14,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2024-11-23 23:18:14,014 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:20:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:20:17,300 INFO L93 Difference]: Finished difference Result 172 states and 204 transitions. [2024-11-23 23:20:17,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-23 23:20:17,301 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 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 [2024-11-23 23:20:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:20:17,303 INFO L225 Difference]: With dead ends: 172 [2024-11-23 23:20:17,303 INFO L226 Difference]: Without dead ends: 111 [2024-11-23 23:20:17,306 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 124.5s TimeCoverageRelationStatistics Valid=1746, Invalid=3222, Unknown=2, NotChecked=0, Total=4970 [2024-11-23 23:20:17,307 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-23 23:20:17,308 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 459 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-23 23:20:17,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-23 23:20:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-23 23:20:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 110 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:20:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2024-11-23 23:20:17,326 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 58 [2024-11-23 23:20:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:20:17,326 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2024-11-23 23:20:17,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:20:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2024-11-23 23:20:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-23 23:20:17,330 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:20:17,330 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:20:17,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 23:20:17,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:17,535 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:20:17,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:20:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1859763149, now seen corresponding path program 5 times [2024-11-23 23:20:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:20:17,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92517133] [2024-11-23 23:20:17,536 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:20:17,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:20:17,680 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-11-23 23:20:17,681 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:20:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:20:20,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:20:20,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92517133] [2024-11-23 23:20:20,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92517133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:20:20,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738222150] [2024-11-23 23:20:20,749 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:20:20,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:20:20,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:20:20,752 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:20:20,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fefbfdb-86fa-4fe3-a006-a801db5be657/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:20:22,046 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-11-23 23:20:22,046 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:20:22,052 WARN L254 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-23 23:20:22,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:20:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:20:22,344 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:20:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:20:28,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738222150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:20:28,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:20:28,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-11-23 23:20:28,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740188691] [2024-11-23 23:20:28,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:20:28,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-23 23:20:28,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:20:28,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-23 23:20:28,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2494, Invalid=6818, Unknown=0, NotChecked=0, Total=9312 [2024-11-23 23:20:28,398 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:21:02,347 WARN L286 SmtUtils]: Spent 30.52s on a formula simplification. DAG size of input: 190 DAG size of output: 18 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:21:36,428 WARN L286 SmtUtils]: Spent 29.53s on a formula simplification. DAG size of input: 186 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:22:00,216 WARN L286 SmtUtils]: Spent 15.18s on a formula simplification. DAG size of input: 182 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:22:33,064 WARN L286 SmtUtils]: Spent 20.07s on a formula simplification. DAG size of input: 178 DAG size of output: 14 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:23:12,428 WARN L286 SmtUtils]: Spent 22.68s on a formula simplification. DAG size of input: 174 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:23:51,173 WARN L286 SmtUtils]: Spent 17.65s on a formula simplification. DAG size of input: 170 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:24:34,658 WARN L286 SmtUtils]: Spent 18.59s on a formula simplification. DAG size of input: 166 DAG size of output: 14 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:25:14,289 WARN L286 SmtUtils]: Spent 10.86s on a formula simplification. DAG size of input: 162 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:26:02,716 WARN L286 SmtUtils]: Spent 15.49s on a formula simplification. DAG size of input: 158 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:26:50,251 WARN L286 SmtUtils]: Spent 10.78s on a formula simplification. DAG size of input: 154 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:27:45,052 WARN L286 SmtUtils]: Spent 15.11s on a formula simplification. DAG size of input: 150 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:28:44,883 WARN L286 SmtUtils]: Spent 17.50s on a formula simplification. DAG size of input: 146 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:29:44,257 WARN L286 SmtUtils]: Spent 9.99s on a formula simplification. DAG size of input: 142 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:31:35,626 WARN L286 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 134 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-23 23:32:46,883 WARN L286 SmtUtils]: Spent 10.37s on a formula simplification. DAG size of input: 130 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)