./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_20-1.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_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/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_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_20-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/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_73a28a49-ba56-441d-b368-9904e5be29a2/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 3ed743515f4bceb442ae4e323a2d4b2eccbeef1c0a0d2152663feb9a9e538afb --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:44:01,986 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:44:02,049 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-24 01:44:02,055 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:44:02,056 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:44:02,082 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:44:02,082 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:44:02,083 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:44:02,083 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:44:02,083 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:44:02,083 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:44:02,083 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:44:02,083 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:44:02,084 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:44:02,084 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:44:02,084 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:44:02,084 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 01:44:02,086 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 01:44:02,087 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 01:44:02,087 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 01:44:02,087 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:44:02,087 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 01:44:02,088 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:44:02,088 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 01:44:02,088 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 01:44:02,088 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 01:44:02,088 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:44:02,089 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:44:02,089 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:44:02,089 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:44:02,089 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:44:02,090 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:44:02,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:44:02,090 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:44:02,090 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:44:02,090 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:44:02,090 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:44:02,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:44:02,091 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:44:02,091 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:44:02,091 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 01:44:02,091 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 01:44:02,091 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 01:44:02,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 01:44:02,092 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:44:02,092 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:44:02,092 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:44:02,092 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:44:02,092 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_73a28a49-ba56-441d-b368-9904e5be29a2/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 -> 3ed743515f4bceb442ae4e323a2d4b2eccbeef1c0a0d2152663feb9a9e538afb [2024-11-24 01:44:02,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:44:02,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:44:02,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:44:02,403 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:44:02,403 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:44:02,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/recursive-simple/fibo_20-1.c [2024-11-24 01:44:05,283 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/data/865873920/bae55b042e1d45baaf9ac3fd5455d095/FLAGc6833de71 [2024-11-24 01:44:05,554 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:44:05,558 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/sv-benchmarks/c/recursive-simple/fibo_20-1.c [2024-11-24 01:44:05,583 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/data/865873920/bae55b042e1d45baaf9ac3fd5455d095/FLAGc6833de71 [2024-11-24 01:44:05,609 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/data/865873920/bae55b042e1d45baaf9ac3fd5455d095 [2024-11-24 01:44:05,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:44:05,614 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:44:05,616 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:44:05,616 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:44:05,622 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:44:05,622 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2bed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05, skipping insertion in model container [2024-11-24 01:44:05,626 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,642 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:44:05,823 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_73a28a49-ba56-441d-b368-9904e5be29a2/sv-benchmarks/c/recursive-simple/fibo_20-1.c[745,758] [2024-11-24 01:44:05,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:44:05,842 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:44:05,861 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_73a28a49-ba56-441d-b368-9904e5be29a2/sv-benchmarks/c/recursive-simple/fibo_20-1.c[745,758] [2024-11-24 01:44:05,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:44:05,880 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:44:05,881 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05 WrapperNode [2024-11-24 01:44:05,881 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:44:05,882 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:44:05,882 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:44:05,882 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:44:05,900 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,910 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,928 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-24 01:44:05,928 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:44:05,929 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:44:05,929 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:44:05,929 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:44:05,939 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,941 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,957 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]. [2024-11-24 01:44:05,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,962 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,962 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,965 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,970 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,971 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,972 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:44:05,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:44:05,973 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:44:05,973 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:44:05,976 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (1/1) ... [2024-11-24 01:44:05,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:44:06,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:06,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:44:06,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:44:06,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:44:06,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:44:06,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:44:06,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 01:44:06,060 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-11-24 01:44:06,060 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-11-24 01:44:06,127 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:44:06,129 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:44:06,269 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-24 01:44:06,269 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:44:06,278 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:44:06,279 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-24 01:44:06,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:44:06 BoogieIcfgContainer [2024-11-24 01:44:06,279 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:44:06,282 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:44:06,282 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:44:06,288 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:44:06,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:44:05" (1/3) ... [2024-11-24 01:44:06,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f688b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:44:06, skipping insertion in model container [2024-11-24 01:44:06,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:44:05" (2/3) ... [2024-11-24 01:44:06,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f688b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:44:06, skipping insertion in model container [2024-11-24 01:44:06,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:44:06" (3/3) ... [2024-11-24 01:44:06,291 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_20-1.c [2024-11-24 01:44:06,307 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:44:06,309 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_20-1.c that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-24 01:44:06,388 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:44:06,404 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;@1fb59153, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:44:06,405 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-24 01:44:06,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-24 01:44:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-24 01:44:06,420 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:06,421 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:06,421 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:06,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:06,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1755511548, now seen corresponding path program 1 times [2024-11-24 01:44:06,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:06,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493584294] [2024-11-24 01:44:06,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:44:06,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:44:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:44:06,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:06,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493584294] [2024-11-24 01:44:06,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493584294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:44:06,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:44:06,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:44:06,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566279417] [2024-11-24 01:44:06,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:44:06,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:44:06,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:06,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:44:06,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:44:06,752 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 01:44:06,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:06,828 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2024-11-24 01:44:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:44:06,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-24 01:44:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:06,838 INFO L225 Difference]: With dead ends: 30 [2024-11-24 01:44:06,841 INFO L226 Difference]: Without dead ends: 18 [2024-11-24 01:44:06,844 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:44:06,851 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:06,852 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:44:06,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-24 01:44:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-24 01:44:06,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-24 01:44:06,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-24 01:44:06,902 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2024-11-24 01:44:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:06,903 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-24 01:44:06,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 01:44:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-24 01:44:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-24 01:44:06,905 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:06,905 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:06,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 01:44:06,906 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:06,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2128459596, now seen corresponding path program 1 times [2024-11-24 01:44:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:06,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63885130] [2024-11-24 01:44:06,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:44:06,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:44:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:44:07,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:07,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63885130] [2024-11-24 01:44:07,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63885130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:44:07,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:44:07,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:44:07,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092731997] [2024-11-24 01:44:07,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:44:07,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:44:07,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:07,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:44:07,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:44:07,056 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 01:44:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:07,080 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2024-11-24 01:44:07,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:44:07,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-24 01:44:07,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:07,082 INFO L225 Difference]: With dead ends: 24 [2024-11-24 01:44:07,083 INFO L226 Difference]: Without dead ends: 20 [2024-11-24 01:44:07,083 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:44:07,085 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:07,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:44:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-24 01:44:07,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2024-11-24 01:44:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-24 01:44:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-24 01:44:07,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2024-11-24 01:44:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:07,097 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-24 01:44:07,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 01:44:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-24 01:44:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-24 01:44:07,101 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:07,101 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:07,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 01:44:07,101 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:07,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:07,102 INFO L85 PathProgramCache]: Analyzing trace with hash -42544313, now seen corresponding path program 1 times [2024-11-24 01:44:07,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:07,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058550325] [2024-11-24 01:44:07,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:44:07,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:44:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:44:07,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:07,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058550325] [2024-11-24 01:44:07,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058550325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:07,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130453796] [2024-11-24 01:44:07,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:44:07,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:07,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:07,318 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:07,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:44:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:44:07,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:44:07,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:44:07,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:44:07,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130453796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:07,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:07,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2024-11-24 01:44:07,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382036624] [2024-11-24 01:44:07,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:07,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 01:44:07,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:07,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 01:44:07,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:44:07,844 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 01:44:07,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:07,964 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2024-11-24 01:44:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:44:07,965 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2024-11-24 01:44:07,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:07,966 INFO L225 Difference]: With dead ends: 35 [2024-11-24 01:44:07,966 INFO L226 Difference]: Without dead ends: 20 [2024-11-24 01:44:07,967 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-24 01:44:07,967 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:07,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:44:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-24 01:44:07,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-24 01:44:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-24 01:44:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-11-24 01:44:07,974 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2024-11-24 01:44:07,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:07,975 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-11-24 01:44:07,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 01:44:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-11-24 01:44:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-24 01:44:07,976 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:07,976 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:07,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 01:44:08,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:08,177 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:08,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:08,178 INFO L85 PathProgramCache]: Analyzing trace with hash 170813287, now seen corresponding path program 1 times [2024-11-24 01:44:08,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:08,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190830315] [2024-11-24 01:44:08,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:44:08,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:44:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 01:44:08,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190830315] [2024-11-24 01:44:08,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190830315] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598471868] [2024-11-24 01:44:08,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:44:08,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:08,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:08,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:08,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:44:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:44:08,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:44:08,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 01:44:08,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:44:08,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598471868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:08,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:08,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2024-11-24 01:44:08,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754215238] [2024-11-24 01:44:08,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:08,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 01:44:08,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:08,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 01:44:08,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-24 01:44:08,746 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-24 01:44:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:08,858 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2024-11-24 01:44:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:44:08,858 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-11-24 01:44:08,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:08,860 INFO L225 Difference]: With dead ends: 29 [2024-11-24 01:44:08,860 INFO L226 Difference]: Without dead ends: 25 [2024-11-24 01:44:08,860 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-24 01:44:08,861 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:08,861 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:44:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-24 01:44:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-24 01:44:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-24 01:44:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2024-11-24 01:44:08,878 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2024-11-24 01:44:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:08,878 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2024-11-24 01:44:08,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-24 01:44:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2024-11-24 01:44:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-24 01:44:08,880 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:08,880 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:08,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-24 01:44:09,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:09,081 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:09,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:09,081 INFO L85 PathProgramCache]: Analyzing trace with hash -187634876, now seen corresponding path program 2 times [2024-11-24 01:44:09,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:09,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970104002] [2024-11-24 01:44:09,081 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:44:09,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:09,099 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:44:09,099 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 01:44:09,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970104002] [2024-11-24 01:44:09,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970104002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8168246] [2024-11-24 01:44:09,479 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:44:09,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:09,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:09,483 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:09,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:44:09,553 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:44:09,553 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:09,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:44:09,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-24 01:44:09,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-24 01:44:10,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8168246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:10,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:10,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 20 [2024-11-24 01:44:10,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300904585] [2024-11-24 01:44:10,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:10,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-24 01:44:10,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:10,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-24 01:44:10,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-24 01:44:10,236 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-24 01:44:10,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:10,687 INFO L93 Difference]: Finished difference Result 46 states and 83 transitions. [2024-11-24 01:44:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 01:44:10,688 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) Word has length 37 [2024-11-24 01:44:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:10,690 INFO L225 Difference]: With dead ends: 46 [2024-11-24 01:44:10,691 INFO L226 Difference]: Without dead ends: 42 [2024-11-24 01:44:10,692 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2024-11-24 01:44:10,693 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:10,693 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 95 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:44:10,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-24 01:44:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2024-11-24 01:44:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-24 01:44:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 46 transitions. [2024-11-24 01:44:10,708 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 46 transitions. Word has length 37 [2024-11-24 01:44:10,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:10,708 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 46 transitions. [2024-11-24 01:44:10,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-24 01:44:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 46 transitions. [2024-11-24 01:44:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-24 01:44:10,711 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:10,711 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 8, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:10,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-24 01:44:10,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:10,916 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:10,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:10,916 INFO L85 PathProgramCache]: Analyzing trace with hash 710953508, now seen corresponding path program 3 times [2024-11-24 01:44:10,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:10,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217759270] [2024-11-24 01:44:10,916 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:44:10,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:10,944 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-24 01:44:10,944 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 167 proven. 27 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-11-24 01:44:11,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:11,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217759270] [2024-11-24 01:44:11,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217759270] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:11,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821186081] [2024-11-24 01:44:11,104 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:44:11,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:11,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:11,108 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:11,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:44:11,183 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-24 01:44:11,183 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:11,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:44:11,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 207 proven. 12 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-24 01:44:11,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 169 proven. 25 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-11-24 01:44:11,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821186081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:11,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:11,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 13 [2024-11-24 01:44:11,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792762519] [2024-11-24 01:44:11,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:11,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 01:44:11,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:11,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 01:44:11,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-24 01:44:11,858 INFO L87 Difference]: Start difference. First operand 30 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-24 01:44:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:11,999 INFO L93 Difference]: Finished difference Result 62 states and 110 transitions. [2024-11-24 01:44:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:44:12,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2024-11-24 01:44:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:12,001 INFO L225 Difference]: With dead ends: 62 [2024-11-24 01:44:12,001 INFO L226 Difference]: Without dead ends: 35 [2024-11-24 01:44:12,002 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 172 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:44:12,003 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:12,003 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 62 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:44:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-24 01:44:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-11-24 01:44:12,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-24 01:44:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2024-11-24 01:44:12,013 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 90 [2024-11-24 01:44:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:12,013 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2024-11-24 01:44:12,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-24 01:44:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2024-11-24 01:44:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-24 01:44:12,016 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:12,016 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:12,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 01:44:12,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-24 01:44:12,221 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:12,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:12,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2015531204, now seen corresponding path program 4 times [2024-11-24 01:44:12,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:12,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084962782] [2024-11-24 01:44:12,222 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:44:12,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:12,240 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:44:12,240 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 96 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-24 01:44:12,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:12,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084962782] [2024-11-24 01:44:12,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084962782] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:12,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451660127] [2024-11-24 01:44:12,502 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:44:12,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:12,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:12,505 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:12,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:44:12,580 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:44:12,581 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:12,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:44:12,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-24 01:44:12,673 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-24 01:44:13,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451660127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:13,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:13,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11] total 17 [2024-11-24 01:44:13,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297762900] [2024-11-24 01:44:13,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:13,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:44:13,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:13,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:44:13,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:44:13,378 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-24 01:44:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:13,638 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2024-11-24 01:44:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 01:44:13,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) Word has length 65 [2024-11-24 01:44:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:13,641 INFO L225 Difference]: With dead ends: 81 [2024-11-24 01:44:13,641 INFO L226 Difference]: Without dead ends: 77 [2024-11-24 01:44:13,642 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2024-11-24 01:44:13,643 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:13,643 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 70 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:44:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-24 01:44:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2024-11-24 01:44:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (38), 16 states have call predecessors, (38), 12 states have call successors, (38) [2024-11-24 01:44:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 97 transitions. [2024-11-24 01:44:13,660 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 97 transitions. Word has length 65 [2024-11-24 01:44:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:13,661 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 97 transitions. [2024-11-24 01:44:13,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-24 01:44:13,661 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 97 transitions. [2024-11-24 01:44:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2024-11-24 01:44:13,665 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:13,665 INFO L218 NwaCegarLoop]: trace histogram [43, 43, 35, 21, 21, 21, 21, 21, 21, 21, 14, 8, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:13,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 01:44:13,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-24 01:44:13,866 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:13,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:13,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2001495241, now seen corresponding path program 5 times [2024-11-24 01:44:13,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:13,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255299812] [2024-11-24 01:44:13,867 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:44:13,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:13,910 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-24 01:44:13,910 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 480 proven. 604 refuted. 0 times theorem prover too weak. 3963 trivial. 0 not checked. [2024-11-24 01:44:14,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:14,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255299812] [2024-11-24 01:44:14,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255299812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:14,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043718757] [2024-11-24 01:44:14,237 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:44:14,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:14,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:14,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:14,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:44:14,370 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-24 01:44:14,370 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:14,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 01:44:14,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 2907 proven. 92 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2024-11-24 01:44:14,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 539 proven. 765 refuted. 0 times theorem prover too weak. 3743 trivial. 0 not checked. [2024-11-24 01:44:16,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043718757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:16,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:16,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 20 [2024-11-24 01:44:16,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295978656] [2024-11-24 01:44:16,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:16,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-24 01:44:16,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:16,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-24 01:44:16,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2024-11-24 01:44:16,486 INFO L87 Difference]: Start difference. First operand 64 states and 97 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 13 states have call successors, (19), 2 states have call predecessors, (19), 7 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-24 01:44:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:16,743 INFO L93 Difference]: Finished difference Result 188 states and 375 transitions. [2024-11-24 01:44:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 01:44:16,744 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 13 states have call successors, (19), 2 states have call predecessors, (19), 7 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) Word has length 297 [2024-11-24 01:44:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:16,747 INFO L225 Difference]: With dead ends: 188 [2024-11-24 01:44:16,747 INFO L226 Difference]: Without dead ends: 129 [2024-11-24 01:44:16,750 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 582 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2024-11-24 01:44:16,750 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:16,751 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 119 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:44:16,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-24 01:44:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2024-11-24 01:44:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 74 states have (on average 1.054054054054054) internal successors, (78), 72 states have internal predecessors, (78), 22 states have call successors, (22), 10 states have call predecessors, (22), 14 states have return successors, (84), 28 states have call predecessors, (84), 22 states have call successors, (84) [2024-11-24 01:44:16,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 184 transitions. [2024-11-24 01:44:16,780 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 184 transitions. Word has length 297 [2024-11-24 01:44:16,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:16,781 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 184 transitions. [2024-11-24 01:44:16,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 13 states have call successors, (19), 2 states have call predecessors, (19), 7 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-24 01:44:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 184 transitions. [2024-11-24 01:44:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2024-11-24 01:44:16,793 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:16,793 INFO L218 NwaCegarLoop]: trace histogram [59, 59, 53, 29, 29, 29, 29, 29, 29, 29, 24, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:16,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 01:44:16,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:16,994 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:16,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:16,995 INFO L85 PathProgramCache]: Analyzing trace with hash 936308275, now seen corresponding path program 6 times [2024-11-24 01:44:16,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:16,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188665053] [2024-11-24 01:44:16,995 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:44:16,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:17,038 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-24 01:44:17,038 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9846 backedges. 518 proven. 875 refuted. 0 times theorem prover too weak. 8453 trivial. 0 not checked. [2024-11-24 01:44:17,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:17,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188665053] [2024-11-24 01:44:17,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188665053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:17,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802990003] [2024-11-24 01:44:17,166 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:44:17,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:17,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:17,170 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:17,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:44:17,294 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-24 01:44:17,295 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:17,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:44:17,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9846 backedges. 4009 proven. 16 refuted. 0 times theorem prover too weak. 5821 trivial. 0 not checked. [2024-11-24 01:44:17,389 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9846 backedges. 516 proven. 877 refuted. 0 times theorem prover too weak. 8453 trivial. 0 not checked. [2024-11-24 01:44:18,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802990003] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:18,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:18,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2024-11-24 01:44:18,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835740662] [2024-11-24 01:44:18,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:18,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 01:44:18,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:18,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 01:44:18,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:44:18,655 INFO L87 Difference]: Start difference. First operand 111 states and 184 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-24 01:44:18,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:18,761 INFO L93 Difference]: Finished difference Result 208 states and 389 transitions. [2024-11-24 01:44:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:44:18,762 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 411 [2024-11-24 01:44:18,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:18,764 INFO L225 Difference]: With dead ends: 208 [2024-11-24 01:44:18,764 INFO L226 Difference]: Without dead ends: 101 [2024-11-24 01:44:18,766 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 816 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:44:18,769 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:18,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 59 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:44:18,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-24 01:44:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-24 01:44:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 66 states have internal predecessors, (71), 20 states have call successors, (20), 10 states have call predecessors, (20), 12 states have return successors, (65), 24 states have call predecessors, (65), 20 states have call successors, (65) [2024-11-24 01:44:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 156 transitions. [2024-11-24 01:44:18,812 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 156 transitions. Word has length 411 [2024-11-24 01:44:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:18,812 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 156 transitions. [2024-11-24 01:44:18,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-24 01:44:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 156 transitions. [2024-11-24 01:44:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-11-24 01:44:18,820 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:18,820 INFO L218 NwaCegarLoop]: trace histogram [39, 39, 31, 19, 19, 19, 19, 19, 19, 19, 12, 8, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:18,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-24 01:44:19,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:19,025 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:19,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:19,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1842983191, now seen corresponding path program 7 times [2024-11-24 01:44:19,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:19,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129098730] [2024-11-24 01:44:19,026 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:44:19,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:44:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 142 proven. 942 refuted. 0 times theorem prover too weak. 3029 trivial. 0 not checked. [2024-11-24 01:44:19,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:19,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129098730] [2024-11-24 01:44:19,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129098730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:19,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228339773] [2024-11-24 01:44:19,573 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:44:19,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:19,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:19,575 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:19,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 01:44:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:44:19,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 01:44:19,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 142 proven. 942 refuted. 0 times theorem prover too weak. 3029 trivial. 0 not checked. [2024-11-24 01:44:19,838 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4113 backedges. 142 proven. 982 refuted. 0 times theorem prover too weak. 2989 trivial. 0 not checked. [2024-11-24 01:44:21,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228339773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:21,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:21,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2024-11-24 01:44:21,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496679724] [2024-11-24 01:44:21,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:21,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:44:21,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:21,682 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:44:21,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:44:21,682 INFO L87 Difference]: Start difference. First operand 101 states and 156 transitions. Second operand has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2024-11-24 01:44:21,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:21,868 INFO L93 Difference]: Finished difference Result 149 states and 297 transitions. [2024-11-24 01:44:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:44:21,868 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) Word has length 269 [2024-11-24 01:44:21,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:21,872 INFO L225 Difference]: With dead ends: 149 [2024-11-24 01:44:21,872 INFO L226 Difference]: Without dead ends: 145 [2024-11-24 01:44:21,873 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 530 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2024-11-24 01:44:21,874 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:21,874 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 86 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:44:21,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-24 01:44:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2024-11-24 01:44:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 69 states have internal predecessors, (74), 21 states have call successors, (21), 10 states have call predecessors, (21), 13 states have return successors, (75), 26 states have call predecessors, (75), 21 states have call successors, (75) [2024-11-24 01:44:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 170 transitions. [2024-11-24 01:44:21,903 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 170 transitions. Word has length 269 [2024-11-24 01:44:21,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:21,904 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 170 transitions. [2024-11-24 01:44:21,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2024-11-24 01:44:21,904 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 170 transitions. [2024-11-24 01:44:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2024-11-24 01:44:21,913 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:21,914 INFO L218 NwaCegarLoop]: trace histogram [59, 59, 47, 29, 29, 29, 29, 29, 29, 29, 18, 12, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:21,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 01:44:22,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-24 01:44:22,118 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:22,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:22,119 INFO L85 PathProgramCache]: Analyzing trace with hash -314665783, now seen corresponding path program 8 times [2024-11-24 01:44:22,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:22,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106286235] [2024-11-24 01:44:22,119 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:44:22,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:22,214 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:44:22,214 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9549 backedges. 297 proven. 1714 refuted. 0 times theorem prover too weak. 7538 trivial. 0 not checked. [2024-11-24 01:44:23,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:23,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106286235] [2024-11-24 01:44:23,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106286235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:23,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065948464] [2024-11-24 01:44:23,018 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:44:23,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:23,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:23,020 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:23,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 01:44:23,261 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:44:23,261 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:23,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-24 01:44:23,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9549 backedges. 297 proven. 1714 refuted. 0 times theorem prover too weak. 7538 trivial. 0 not checked. [2024-11-24 01:44:23,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9549 backedges. 297 proven. 1771 refuted. 0 times theorem prover too weak. 7481 trivial. 0 not checked. [2024-11-24 01:44:26,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065948464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:26,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:26,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2024-11-24 01:44:26,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333412858] [2024-11-24 01:44:26,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:26,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:44:26,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:26,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:44:26,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:44:26,081 INFO L87 Difference]: Start difference. First operand 106 states and 170 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-24 01:44:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:26,299 INFO L93 Difference]: Finished difference Result 161 states and 347 transitions. [2024-11-24 01:44:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 01:44:26,300 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 405 [2024-11-24 01:44:26,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:26,304 INFO L225 Difference]: With dead ends: 161 [2024-11-24 01:44:26,305 INFO L226 Difference]: Without dead ends: 157 [2024-11-24 01:44:26,305 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 801 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:44:26,306 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:26,306 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 94 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:44:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-24 01:44:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 111. [2024-11-24 01:44:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 72 states have internal predecessors, (77), 22 states have call successors, (22), 10 states have call predecessors, (22), 14 states have return successors, (87), 28 states have call predecessors, (87), 22 states have call successors, (87) [2024-11-24 01:44:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 186 transitions. [2024-11-24 01:44:26,340 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 186 transitions. Word has length 405 [2024-11-24 01:44:26,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:26,341 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 186 transitions. [2024-11-24 01:44:26,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-24 01:44:26,341 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 186 transitions. [2024-11-24 01:44:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2024-11-24 01:44:26,347 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:26,348 INFO L218 NwaCegarLoop]: trace histogram [107, 107, 83, 53, 53, 53, 53, 53, 53, 53, 30, 24, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:26,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-24 01:44:26,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:26,552 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:26,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:26,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1652776311, now seen corresponding path program 9 times [2024-11-24 01:44:26,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:26,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147757263] [2024-11-24 01:44:26,552 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:44:26,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:26,592 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-24 01:44:26,592 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 31599 backedges. 2753 proven. 36 refuted. 0 times theorem prover too weak. 28810 trivial. 0 not checked. [2024-11-24 01:44:26,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:26,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147757263] [2024-11-24 01:44:26,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147757263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:26,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507503088] [2024-11-24 01:44:26,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:44:26,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:26,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:26,763 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:26,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 01:44:26,936 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-24 01:44:26,936 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:26,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:44:26,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31599 backedges. 3024 proven. 41 refuted. 0 times theorem prover too weak. 28534 trivial. 0 not checked. [2024-11-24 01:44:27,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 31599 backedges. 3024 proven. 44 refuted. 0 times theorem prover too weak. 28531 trivial. 0 not checked. [2024-11-24 01:44:29,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507503088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:29,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:29,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 16 [2024-11-24 01:44:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602251627] [2024-11-24 01:44:29,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:29,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 01:44:29,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:29,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 01:44:29,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:44:29,560 INFO L87 Difference]: Start difference. First operand 111 states and 186 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 9 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-24 01:44:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:29,734 INFO L93 Difference]: Finished difference Result 216 states and 401 transitions. [2024-11-24 01:44:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 01:44:29,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 9 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) Word has length 729 [2024-11-24 01:44:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:29,737 INFO L225 Difference]: With dead ends: 216 [2024-11-24 01:44:29,737 INFO L226 Difference]: Without dead ends: 110 [2024-11-24 01:44:29,740 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1476 GetRequests, 1450 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2024-11-24 01:44:29,741 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:29,741 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 74 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:44:29,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-24 01:44:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2024-11-24 01:44:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 68 states have internal predecessors, (74), 20 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (68), 26 states have call predecessors, (68), 20 states have call successors, (68) [2024-11-24 01:44:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 162 transitions. [2024-11-24 01:44:29,765 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 162 transitions. Word has length 729 [2024-11-24 01:44:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:29,766 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 162 transitions. [2024-11-24 01:44:29,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 9 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-24 01:44:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 162 transitions. [2024-11-24 01:44:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2024-11-24 01:44:29,772 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:29,772 INFO L218 NwaCegarLoop]: trace histogram [95, 95, 77, 47, 47, 47, 47, 47, 47, 47, 30, 18, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:29,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 01:44:29,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-24 01:44:29,977 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:29,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:29,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1393227277, now seen corresponding path program 10 times [2024-11-24 01:44:29,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:29,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846556966] [2024-11-24 01:44:29,978 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:44:29,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:30,064 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:44:30,064 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 1108 proven. 4305 refuted. 0 times theorem prover too weak. 19697 trivial. 0 not checked. [2024-11-24 01:44:31,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:31,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846556966] [2024-11-24 01:44:31,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846556966] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:31,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922785971] [2024-11-24 01:44:31,218 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:44:31,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:31,220 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:31,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 01:44:31,511 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:44:31,512 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:31,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-24 01:44:31,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 13592 proven. 1601 refuted. 0 times theorem prover too weak. 9917 trivial. 0 not checked. [2024-11-24 01:44:31,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 1275 proven. 4953 refuted. 0 times theorem prover too weak. 18882 trivial. 0 not checked. [2024-11-24 01:44:36,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922785971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:36,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:36,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 27] total 32 [2024-11-24 01:44:36,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177470172] [2024-11-24 01:44:36,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:36,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-24 01:44:36,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:36,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-24 01:44:36,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2024-11-24 01:44:36,968 INFO L87 Difference]: Start difference. First operand 105 states and 162 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 26 states have call successors, (32), 2 states have call predecessors, (32), 14 states have return successors, (43), 15 states have call predecessors, (43), 26 states have call successors, (43) [2024-11-24 01:44:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:37,719 INFO L93 Difference]: Finished difference Result 212 states and 399 transitions. [2024-11-24 01:44:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-24 01:44:37,719 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 26 states have call successors, (32), 2 states have call predecessors, (32), 14 states have return successors, (43), 15 states have call predecessors, (43), 26 states have call successors, (43) Word has length 651 [2024-11-24 01:44:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:37,723 INFO L225 Difference]: With dead ends: 212 [2024-11-24 01:44:37,723 INFO L226 Difference]: Without dead ends: 112 [2024-11-24 01:44:37,725 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1351 GetRequests, 1282 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=824, Invalid=2482, Unknown=0, NotChecked=0, Total=3306 [2024-11-24 01:44:37,726 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 167 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:37,726 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 195 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 01:44:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-24 01:44:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 95. [2024-11-24 01:44:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 65 states have internal predecessors, (71), 17 states have call successors, (17), 14 states have call predecessors, (17), 9 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) [2024-11-24 01:44:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 131 transitions. [2024-11-24 01:44:37,743 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 131 transitions. Word has length 651 [2024-11-24 01:44:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:37,744 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 131 transitions. [2024-11-24 01:44:37,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 26 states have call successors, (32), 2 states have call predecessors, (32), 14 states have return successors, (43), 15 states have call predecessors, (43), 26 states have call successors, (43) [2024-11-24 01:44:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 131 transitions. [2024-11-24 01:44:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2024-11-24 01:44:37,751 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:37,751 INFO L218 NwaCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:37,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-24 01:44:37,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-24 01:44:37,956 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:37,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:37,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1550468663, now seen corresponding path program 11 times [2024-11-24 01:44:37,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:37,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766061605] [2024-11-24 01:44:37,956 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:44:37,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:38,122 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 74 check-sat command(s) [2024-11-24 01:44:38,122 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 2669 proven. 2765 refuted. 0 times theorem prover too weak. 13669 trivial. 0 not checked. [2024-11-24 01:44:39,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:39,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766061605] [2024-11-24 01:44:39,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766061605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:39,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389658623] [2024-11-24 01:44:39,333 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:44:39,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:39,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:39,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:39,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 01:44:39,805 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 74 check-sat command(s) [2024-11-24 01:44:39,805 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:39,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-24 01:44:39,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 2649 proven. 2769 refuted. 0 times theorem prover too weak. 13685 trivial. 0 not checked. [2024-11-24 01:44:39,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 2657 proven. 2852 refuted. 0 times theorem prover too weak. 13594 trivial. 0 not checked. [2024-11-24 01:44:44,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389658623] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:44,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:44,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 29] total 33 [2024-11-24 01:44:44,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568675142] [2024-11-24 01:44:44,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:44,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-24 01:44:44,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:44,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-24 01:44:44,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2024-11-24 01:44:44,842 INFO L87 Difference]: Start difference. First operand 95 states and 131 transitions. Second operand has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 27 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (41), 17 states have call predecessors, (41), 27 states have call successors, (41) [2024-11-24 01:44:45,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:45,714 INFO L93 Difference]: Finished difference Result 245 states and 403 transitions. [2024-11-24 01:44:45,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-24 01:44:45,715 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 27 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (41), 17 states have call predecessors, (41), 27 states have call successors, (41) Word has length 569 [2024-11-24 01:44:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:45,720 INFO L225 Difference]: With dead ends: 245 [2024-11-24 01:44:45,720 INFO L226 Difference]: Without dead ends: 138 [2024-11-24 01:44:45,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1204 GetRequests, 1121 SyntacticMatches, 14 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1210, Invalid=3760, Unknown=0, NotChecked=0, Total=4970 [2024-11-24 01:44:45,724 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 152 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:45,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 224 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 01:44:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-24 01:44:45,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 109. [2024-11-24 01:44:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 75 states have internal predecessors, (81), 21 states have call successors, (21), 17 states have call predecessors, (21), 9 states have return successors, (51), 16 states have call predecessors, (51), 21 states have call successors, (51) [2024-11-24 01:44:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 153 transitions. [2024-11-24 01:44:45,741 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 153 transitions. Word has length 569 [2024-11-24 01:44:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:45,742 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 153 transitions. [2024-11-24 01:44:45,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 27 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (41), 17 states have call predecessors, (41), 27 states have call successors, (41) [2024-11-24 01:44:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 153 transitions. [2024-11-24 01:44:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2024-11-24 01:44:45,746 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:45,747 INFO L218 NwaCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:45,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-24 01:44:45,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-24 01:44:45,951 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:45,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:45,951 INFO L85 PathProgramCache]: Analyzing trace with hash 883862327, now seen corresponding path program 12 times [2024-11-24 01:44:45,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:45,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769155866] [2024-11-24 01:44:45,951 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:44:45,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:46,015 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-24 01:44:46,015 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 525 proven. 1830 refuted. 0 times theorem prover too weak. 10032 trivial. 0 not checked. [2024-11-24 01:44:46,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:46,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769155866] [2024-11-24 01:44:46,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769155866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:46,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355771770] [2024-11-24 01:44:46,579 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:44:46,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:46,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:46,582 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:46,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 01:44:46,947 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-24 01:44:46,947 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:44:46,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-24 01:44:46,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 508 proven. 1816 refuted. 0 times theorem prover too weak. 10063 trivial. 0 not checked. [2024-11-24 01:44:47,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 512 proven. 1869 refuted. 0 times theorem prover too weak. 10006 trivial. 0 not checked. [2024-11-24 01:44:49,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355771770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:49,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:49,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 17] total 27 [2024-11-24 01:44:49,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700635210] [2024-11-24 01:44:49,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:49,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-24 01:44:49,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:49,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-24 01:44:49,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2024-11-24 01:44:49,703 INFO L87 Difference]: Start difference. First operand 109 states and 153 transitions. Second operand has 27 states, 23 states have (on average 3.0) internal successors, (69), 27 states have internal predecessors, (69), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 19 states have call successors, (27) [2024-11-24 01:44:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:50,348 INFO L93 Difference]: Finished difference Result 136 states and 188 transitions. [2024-11-24 01:44:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-24 01:44:50,348 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 3.0) internal successors, (69), 27 states have internal predecessors, (69), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 19 states have call successors, (27) Word has length 460 [2024-11-24 01:44:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:50,351 INFO L225 Difference]: With dead ends: 136 [2024-11-24 01:44:50,351 INFO L226 Difference]: Without dead ends: 132 [2024-11-24 01:44:50,352 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 908 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=645, Invalid=1517, Unknown=0, NotChecked=0, Total=2162 [2024-11-24 01:44:50,353 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:50,353 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 133 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:44:50,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-24 01:44:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2024-11-24 01:44:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 80 states have (on average 1.0375) internal successors, (83), 77 states have internal predecessors, (83), 21 states have call successors, (21), 17 states have call predecessors, (21), 10 states have return successors, (56), 17 states have call predecessors, (56), 21 states have call successors, (56) [2024-11-24 01:44:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 160 transitions. [2024-11-24 01:44:50,368 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 160 transitions. Word has length 460 [2024-11-24 01:44:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:50,369 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 160 transitions. [2024-11-24 01:44:50,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 3.0) internal successors, (69), 27 states have internal predecessors, (69), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 19 states have call successors, (27) [2024-11-24 01:44:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 160 transitions. [2024-11-24 01:44:50,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1074 [2024-11-24 01:44:50,380 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:50,380 INFO L218 NwaCegarLoop]: trace histogram [157, 157, 127, 78, 78, 78, 78, 78, 78, 78, 49, 30, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:50,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-24 01:44:50,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-24 01:44:50,585 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:44:50,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:44:50,586 INFO L85 PathProgramCache]: Analyzing trace with hash -253969916, now seen corresponding path program 13 times [2024-11-24 01:44:50,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:44:50,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745923067] [2024-11-24 01:44:50,586 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:44:50,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:44:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:44:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 68997 backedges. 779 proven. 6675 refuted. 0 times theorem prover too weak. 61543 trivial. 0 not checked. [2024-11-24 01:44:52,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:44:52,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745923067] [2024-11-24 01:44:52,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745923067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:44:52,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063850896] [2024-11-24 01:44:52,756 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:44:52,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:44:52,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:44:52,759 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:44:52,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-24 01:44:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:44:53,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 2402 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-24 01:44:53,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:44:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 68997 backedges. 779 proven. 6675 refuted. 0 times theorem prover too weak. 61543 trivial. 0 not checked. [2024-11-24 01:44:53,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:44:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 68997 backedges. 779 proven. 6775 refuted. 0 times theorem prover too weak. 61443 trivial. 0 not checked. [2024-11-24 01:44:59,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063850896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:44:59,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:44:59,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 23 [2024-11-24 01:44:59,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582109205] [2024-11-24 01:44:59,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:44:59,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-24 01:44:59,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:44:59,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-24 01:44:59,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2024-11-24 01:44:59,555 INFO L87 Difference]: Start difference. First operand 112 states and 160 transitions. Second operand has 23 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 23 states have internal predecessors, (70), 20 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (28), 10 states have call predecessors, (28), 20 states have call successors, (28) [2024-11-24 01:44:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:44:59,766 INFO L93 Difference]: Finished difference Result 121 states and 179 transitions. [2024-11-24 01:44:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 01:44:59,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 23 states have internal predecessors, (70), 20 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (28), 10 states have call predecessors, (28), 20 states have call successors, (28) Word has length 1073 [2024-11-24 01:44:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:44:59,770 INFO L225 Difference]: With dead ends: 121 [2024-11-24 01:44:59,770 INFO L226 Difference]: Without dead ends: 117 [2024-11-24 01:44:59,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2173 GetRequests, 2135 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2024-11-24 01:44:59,772 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:44:59,773 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 115 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:44:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-24 01:44:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-11-24 01:44:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 83 states have (on average 1.036144578313253) internal successors, (86), 80 states have internal predecessors, (86), 22 states have call successors, (22), 17 states have call predecessors, (22), 11 states have return successors, (67), 19 states have call predecessors, (67), 22 states have call successors, (67) [2024-11-24 01:44:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 175 transitions. [2024-11-24 01:44:59,789 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 175 transitions. Word has length 1073 [2024-11-24 01:44:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:44:59,791 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 175 transitions. [2024-11-24 01:44:59,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 23 states have internal predecessors, (70), 20 states have call successors, (21), 1 states have call predecessors, (21), 10 states have return successors, (28), 10 states have call predecessors, (28), 20 states have call successors, (28) [2024-11-24 01:44:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 175 transitions. [2024-11-24 01:44:59,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1605 [2024-11-24 01:44:59,810 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:44:59,811 INFO L218 NwaCegarLoop]: trace histogram [235, 235, 190, 117, 117, 117, 117, 117, 117, 117, 73, 45, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:44:59,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-24 01:45:00,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-24 01:45:00,015 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:45:00,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:00,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1312959461, now seen corresponding path program 14 times [2024-11-24 01:45:00,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:00,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902495153] [2024-11-24 01:45:00,016 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:45:00,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:00,352 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:45:00,352 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:45:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 155079 backedges. 1456 proven. 11180 refuted. 0 times theorem prover too weak. 142443 trivial. 0 not checked. [2024-11-24 01:45:03,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:03,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902495153] [2024-11-24 01:45:03,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902495153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:45:03,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447586725] [2024-11-24 01:45:03,571 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:45:03,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:45:03,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:45:03,573 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:45:03,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 01:45:04,280 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:45:04,280 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:45:04,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 3581 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-24 01:45:04,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:45:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 155079 backedges. 1456 proven. 11180 refuted. 0 times theorem prover too weak. 142443 trivial. 0 not checked. [2024-11-24 01:45:04,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:45:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 155079 backedges. 1456 proven. 11306 refuted. 0 times theorem prover too weak. 142317 trivial. 0 not checked. [2024-11-24 01:45:13,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447586725] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:45:13,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:45:13,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2024-11-24 01:45:13,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627354085] [2024-11-24 01:45:13,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:45:13,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:45:13,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:13,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:45:13,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:45:13,329 INFO L87 Difference]: Start difference. First operand 117 states and 175 transitions. Second operand has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2024-11-24 01:45:13,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:45:13,667 INFO L93 Difference]: Finished difference Result 126 states and 196 transitions. [2024-11-24 01:45:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-24 01:45:13,667 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) Word has length 1604 [2024-11-24 01:45:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:45:13,671 INFO L225 Difference]: With dead ends: 126 [2024-11-24 01:45:13,671 INFO L226 Difference]: Without dead ends: 122 [2024-11-24 01:45:13,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3238 GetRequests, 3196 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=356, Invalid=766, Unknown=0, NotChecked=0, Total=1122 [2024-11-24 01:45:13,673 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 198 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:45:13,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 108 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:45:13,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-24 01:45:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-24 01:45:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 83 states have internal predecessors, (89), 23 states have call successors, (23), 17 states have call predecessors, (23), 12 states have return successors, (80), 21 states have call predecessors, (80), 23 states have call successors, (80) [2024-11-24 01:45:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 192 transitions. [2024-11-24 01:45:13,688 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 192 transitions. Word has length 1604 [2024-11-24 01:45:13,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:45:13,689 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 192 transitions. [2024-11-24 01:45:13,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2024-11-24 01:45:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 192 transitions. [2024-11-24 01:45:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3117 [2024-11-24 01:45:13,756 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:45:13,756 INFO L218 NwaCegarLoop]: trace histogram [457, 457, 370, 228, 228, 228, 228, 228, 228, 228, 142, 87, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:45:13,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-24 01:45:13,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-24 01:45:13,957 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:45:13,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:13,958 INFO L85 PathProgramCache]: Analyzing trace with hash 830505390, now seen corresponding path program 15 times [2024-11-24 01:45:13,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:13,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893543659] [2024-11-24 01:45:13,958 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:45:13,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:14,066 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2024-11-24 01:45:14,066 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:45:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 588561 backedges. 2600 proven. 25032 refuted. 0 times theorem prover too weak. 560929 trivial. 0 not checked. [2024-11-24 01:45:14,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:14,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893543659] [2024-11-24 01:45:14,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893543659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:45:14,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301946115] [2024-11-24 01:45:14,710 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:45:14,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:45:14,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:45:14,712 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:45:14,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-24 01:45:15,355 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2024-11-24 01:45:15,355 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:45:15,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-24 01:45:15,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:45:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 588561 backedges. 2600 proven. 25032 refuted. 0 times theorem prover too weak. 560929 trivial. 0 not checked. [2024-11-24 01:45:15,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:45:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 588561 backedges. 2600 proven. 25187 refuted. 0 times theorem prover too weak. 560774 trivial. 0 not checked. [2024-11-24 01:45:31,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301946115] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:45:31,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:45:31,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 27 [2024-11-24 01:45:31,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838732620] [2024-11-24 01:45:31,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:45:31,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-24 01:45:31,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:31,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-24 01:45:31,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2024-11-24 01:45:31,324 INFO L87 Difference]: Start difference. First operand 122 states and 192 transitions. Second operand has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2024-11-24 01:45:31,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:45:31,656 INFO L93 Difference]: Finished difference Result 131 states and 215 transitions. [2024-11-24 01:45:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 01:45:31,656 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) Word has length 3116 [2024-11-24 01:45:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:45:31,662 INFO L225 Difference]: With dead ends: 131 [2024-11-24 01:45:31,662 INFO L226 Difference]: Without dead ends: 127 [2024-11-24 01:45:31,663 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6265 GetRequests, 6219 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2024-11-24 01:45:31,663 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:45:31,664 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 131 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:45:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-24 01:45:31,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-11-24 01:45:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 86 states have internal predecessors, (92), 24 states have call successors, (24), 17 states have call predecessors, (24), 13 states have return successors, (95), 23 states have call predecessors, (95), 24 states have call successors, (95) [2024-11-24 01:45:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 211 transitions. [2024-11-24 01:45:31,679 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 211 transitions. Word has length 3116 [2024-11-24 01:45:31,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:45:31,682 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 211 transitions. [2024-11-24 01:45:31,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2024-11-24 01:45:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 211 transitions. [2024-11-24 01:45:31,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4765 [2024-11-24 01:45:31,830 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:45:31,831 INFO L218 NwaCegarLoop]: trace histogram [699, 699, 566, 349, 349, 349, 349, 349, 349, 349, 217, 133, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:45:31,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-24 01:45:32,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-24 01:45:32,032 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:45:32,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:32,033 INFO L85 PathProgramCache]: Analyzing trace with hash -11024799, now seen corresponding path program 16 times [2024-11-24 01:45:32,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:32,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936079057] [2024-11-24 01:45:32,033 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:45:32,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:33,209 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:45:33,209 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:45:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1378603 backedges. 12013 proven. 69069 refuted. 0 times theorem prover too weak. 1297521 trivial. 0 not checked. [2024-11-24 01:45:58,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936079057] [2024-11-24 01:45:58,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936079057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:45:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799665601] [2024-11-24 01:45:58,875 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:45:58,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:45:58,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:45:58,877 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:45:58,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-24 01:46:00,529 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:46:00,529 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:46:00,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 8476 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-24 01:46:00,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:46:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1378603 backedges. 610998 proven. 14469 refuted. 0 times theorem prover too weak. 753136 trivial. 0 not checked. [2024-11-24 01:46:00,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:46:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1378603 backedges. 11437 proven. 65966 refuted. 0 times theorem prover too weak. 1301200 trivial. 0 not checked. [2024-11-24 01:46:28,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799665601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:46:28,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:46:28,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 39] total 42 [2024-11-24 01:46:28,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487291706] [2024-11-24 01:46:28,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:46:28,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-24 01:46:28,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:46:28,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-24 01:46:28,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2024-11-24 01:46:28,622 INFO L87 Difference]: Start difference. First operand 127 states and 211 transitions. Second operand has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 states have internal predecessors, (139), 39 states have call successors, (44), 2 states have call predecessors, (44), 21 states have return successors, (62), 21 states have call predecessors, (62), 39 states have call successors, (62) [2024-11-24 01:46:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:46:29,435 INFO L93 Difference]: Finished difference Result 311 states and 687 transitions. [2024-11-24 01:46:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-24 01:46:29,436 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 states have internal predecessors, (139), 39 states have call successors, (44), 2 states have call predecessors, (44), 21 states have return successors, (62), 21 states have call predecessors, (62), 39 states have call successors, (62) Word has length 4764 [2024-11-24 01:46:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:46:29,440 INFO L225 Difference]: With dead ends: 311 [2024-11-24 01:46:29,441 INFO L226 Difference]: Without dead ends: 189 [2024-11-24 01:46:29,444 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9596 GetRequests, 9508 SyntacticMatches, 19 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1201, Invalid=3769, Unknown=0, NotChecked=0, Total=4970 [2024-11-24 01:46:29,446 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 292 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 01:46:29,446 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 288 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 01:46:29,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-24 01:46:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 132. [2024-11-24 01:46:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 90 states have internal predecessors, (94), 26 states have call successors, (26), 18 states have call predecessors, (26), 13 states have return successors, (90), 23 states have call predecessors, (90), 26 states have call successors, (90) [2024-11-24 01:46:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 210 transitions. [2024-11-24 01:46:29,470 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 210 transitions. Word has length 4764 [2024-11-24 01:46:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:46:29,471 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 210 transitions. [2024-11-24 01:46:29,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3095238095238093) internal successors, (139), 42 states have internal predecessors, (139), 39 states have call successors, (44), 2 states have call predecessors, (44), 21 states have return successors, (62), 21 states have call predecessors, (62), 39 states have call successors, (62) [2024-11-24 01:46:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 210 transitions. [2024-11-24 01:46:29,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3171 [2024-11-24 01:46:29,551 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:46:29,552 INFO L218 NwaCegarLoop]: trace histogram [465, 465, 376, 232, 232, 232, 232, 232, 232, 232, 144, 89, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:46:29,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-24 01:46:29,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:46:29,752 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:46:29,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:46:29,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1169407108, now seen corresponding path program 17 times [2024-11-24 01:46:29,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:46:29,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247027173] [2024-11-24 01:46:29,754 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:46:29,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:46:32,039 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 399 check-sat command(s) [2024-11-24 01:46:32,040 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:46:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 609204 backedges. 18658 proven. 9464 refuted. 0 times theorem prover too weak. 581082 trivial. 0 not checked. [2024-11-24 01:46:42,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:46:42,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247027173] [2024-11-24 01:46:42,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247027173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:46:42,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191471139] [2024-11-24 01:46:42,561 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:46:42,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:46:42,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:46:42,564 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:46:42,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-24 01:46:48,404 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 399 check-sat command(s) [2024-11-24 01:46:48,404 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:46:48,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 7058 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-24 01:46:48,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:46:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 609204 backedges. 18658 proven. 9464 refuted. 0 times theorem prover too weak. 581082 trivial. 0 not checked. [2024-11-24 01:46:48,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:47:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 609204 backedges. 18676 proven. 9601 refuted. 0 times theorem prover too weak. 580927 trivial. 0 not checked. [2024-11-24 01:47:04,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191471139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:47:04,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:47:04,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 27 [2024-11-24 01:47:04,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406517377] [2024-11-24 01:47:04,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:47:04,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-24 01:47:04,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:04,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-24 01:47:04,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2024-11-24 01:47:04,008 INFO L87 Difference]: Start difference. First operand 132 states and 210 transitions. Second operand has 27 states, 25 states have (on average 3.32) internal successors, (83), 27 states have internal predecessors, (83), 23 states have call successors, (26), 1 states have call predecessors, (26), 12 states have return successors, (35), 14 states have call predecessors, (35), 23 states have call successors, (35) [2024-11-24 01:47:04,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:47:04,259 INFO L93 Difference]: Finished difference Result 139 states and 225 transitions. [2024-11-24 01:47:04,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 01:47:04,259 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.32) internal successors, (83), 27 states have internal predecessors, (83), 23 states have call successors, (26), 1 states have call predecessors, (26), 12 states have return successors, (35), 14 states have call predecessors, (35), 23 states have call successors, (35) Word has length 3170 [2024-11-24 01:47:04,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:47:04,264 INFO L225 Difference]: With dead ends: 139 [2024-11-24 01:47:04,264 INFO L226 Difference]: Without dead ends: 135 [2024-11-24 01:47:04,265 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6373 GetRequests, 6327 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2024-11-24 01:47:04,266 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:47:04,266 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 114 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:47:04,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-24 01:47:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2024-11-24 01:47:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 90 states have internal predecessors, (94), 26 states have call successors, (26), 18 states have call predecessors, (26), 13 states have return successors, (90), 23 states have call predecessors, (90), 26 states have call successors, (90) [2024-11-24 01:47:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 210 transitions. [2024-11-24 01:47:04,284 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 210 transitions. Word has length 3170 [2024-11-24 01:47:04,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:47:04,287 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 210 transitions. [2024-11-24 01:47:04,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.32) internal successors, (83), 27 states have internal predecessors, (83), 23 states have call successors, (26), 1 states have call predecessors, (26), 12 states have return successors, (35), 14 states have call predecessors, (35), 23 states have call successors, (35) [2024-11-24 01:47:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 210 transitions. [2024-11-24 01:47:04,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3920 [2024-11-24 01:47:04,378 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:47:04,378 INFO L218 NwaCegarLoop]: trace histogram [575, 575, 465, 287, 287, 287, 287, 287, 287, 287, 178, 110, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:04,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-24 01:47:04,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:04,579 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:47:04,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:04,580 INFO L85 PathProgramCache]: Analyzing trace with hash 506790737, now seen corresponding path program 18 times [2024-11-24 01:47:04,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:04,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823482232] [2024-11-24 01:47:04,581 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:47:04,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:04,682 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2024-11-24 01:47:04,682 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 932144 backedges. 6094 proven. 28446 refuted. 0 times theorem prover too weak. 897604 trivial. 0 not checked. [2024-11-24 01:47:05,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:05,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823482232] [2024-11-24 01:47:05,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823482232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:47:05,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468013930] [2024-11-24 01:47:05,468 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:47:05,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:05,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:05,470 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:47:05,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-24 01:47:06,562 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2024-11-24 01:47:06,562 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:06,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-24 01:47:06,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:47:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 932144 backedges. 6112 proven. 28819 refuted. 0 times theorem prover too weak. 897213 trivial. 0 not checked. [2024-11-24 01:47:06,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:47:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 932144 backedges. 6124 proven. 28962 refuted. 0 times theorem prover too weak. 897058 trivial. 0 not checked. [2024-11-24 01:47:25,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468013930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:47:25,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:47:25,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 25] total 34 [2024-11-24 01:47:25,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152369797] [2024-11-24 01:47:25,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:47:25,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-24 01:47:25,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:25,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-24 01:47:25,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2024-11-24 01:47:25,351 INFO L87 Difference]: Start difference. First operand 132 states and 210 transitions. Second operand has 34 states, 32 states have (on average 2.96875) internal successors, (95), 34 states have internal predecessors, (95), 26 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (39), 17 states have call predecessors, (39), 26 states have call successors, (39) [2024-11-24 01:47:26,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:47:26,041 INFO L93 Difference]: Finished difference Result 388 states and 689 transitions. [2024-11-24 01:47:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-24 01:47:26,042 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.96875) internal successors, (95), 34 states have internal predecessors, (95), 26 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (39), 17 states have call predecessors, (39), 26 states have call successors, (39) Word has length 3919 [2024-11-24 01:47:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:47:26,049 INFO L225 Difference]: With dead ends: 388 [2024-11-24 01:47:26,049 INFO L226 Difference]: Without dead ends: 232 [2024-11-24 01:47:26,051 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7893 GetRequests, 7821 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1260, Invalid=2646, Unknown=0, NotChecked=0, Total=3906 [2024-11-24 01:47:26,052 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:47:26,053 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 151 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:47:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-24 01:47:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 175. [2024-11-24 01:47:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 121 states have internal predecessors, (127), 35 states have call successors, (35), 27 states have call predecessors, (35), 15 states have return successors, (129), 26 states have call predecessors, (129), 35 states have call successors, (129) [2024-11-24 01:47:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 291 transitions. [2024-11-24 01:47:26,080 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 291 transitions. Word has length 3919 [2024-11-24 01:47:26,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:47:26,084 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 291 transitions. [2024-11-24 01:47:26,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.96875) internal successors, (95), 34 states have internal predecessors, (95), 26 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (39), 17 states have call predecessors, (39), 26 states have call successors, (39) [2024-11-24 01:47:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 291 transitions. [2024-11-24 01:47:26,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5772 [2024-11-24 01:47:26,396 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:47:26,397 INFO L218 NwaCegarLoop]: trace histogram [847, 847, 685, 423, 423, 423, 423, 423, 423, 423, 262, 162, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:26,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-24 01:47:26,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-24 01:47:26,598 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:47:26,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:26,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2112392431, now seen corresponding path program 19 times [2024-11-24 01:47:26,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:26,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385826310] [2024-11-24 01:47:26,602 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:47:26,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:47:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2024406 backedges. 12724 proven. 39043 refuted. 0 times theorem prover too weak. 1972639 trivial. 0 not checked. [2024-11-24 01:47:59,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:59,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385826310] [2024-11-24 01:47:59,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385826310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:47:59,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177212719] [2024-11-24 01:47:59,971 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:47:59,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:59,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:59,973 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:47:59,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-24 01:48:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:48:02,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 12833 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-24 01:48:02,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:48:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2024406 backedges. 5627 proven. 55717 refuted. 0 times theorem prover too weak. 1963062 trivial. 0 not checked. [2024-11-24 01:48:02,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:48:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2024406 backedges. 5627 proven. 55939 refuted. 0 times theorem prover too weak. 1962840 trivial. 0 not checked. [2024-11-24 01:48:31,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177212719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:48:31,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:48:31,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 29] total 31 [2024-11-24 01:48:31,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251778442] [2024-11-24 01:48:31,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:48:31,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-24 01:48:31,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:48:31,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-24 01:48:31,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2024-11-24 01:48:31,958 INFO L87 Difference]: Start difference. First operand 175 states and 291 transitions. Second operand has 31 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 31 states have internal predecessors, (95), 28 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (43), 15 states have call predecessors, (43), 28 states have call successors, (43) [2024-11-24 01:48:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:48:32,286 INFO L93 Difference]: Finished difference Result 194 states and 355 transitions. [2024-11-24 01:48:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 01:48:32,287 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 31 states have internal predecessors, (95), 28 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (43), 15 states have call predecessors, (43), 28 states have call successors, (43) Word has length 5771 [2024-11-24 01:48:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:48:32,299 INFO L225 Difference]: With dead ends: 194 [2024-11-24 01:48:32,299 INFO L226 Difference]: Without dead ends: 190 [2024-11-24 01:48:32,300 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11577 GetRequests, 11523 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=578, Invalid=1228, Unknown=0, NotChecked=0, Total=1806 [2024-11-24 01:48:32,305 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:48:32,305 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 130 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:48:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-24 01:48:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2024-11-24 01:48:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 128 states have internal predecessors, (134), 38 states have call successors, (38), 27 states have call predecessors, (38), 17 states have return successors, (166), 31 states have call predecessors, (166), 38 states have call successors, (166) [2024-11-24 01:48:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 338 transitions. [2024-11-24 01:48:32,334 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 338 transitions. Word has length 5771 [2024-11-24 01:48:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:48:32,340 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 338 transitions. [2024-11-24 01:48:32,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 31 states have internal predecessors, (95), 28 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (43), 15 states have call predecessors, (43), 28 states have call successors, (43) [2024-11-24 01:48:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 338 transitions. [2024-11-24 01:48:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15536 [2024-11-24 01:48:33,531 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:48:33,533 INFO L218 NwaCegarLoop]: trace histogram [2281, 2281, 1845, 1140, 1140, 1140, 1140, 1140, 1140, 1140, 705, 436, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:48:33,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-24 01:48:33,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-24 01:48:33,734 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:48:33,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:48:33,738 INFO L85 PathProgramCache]: Analyzing trace with hash -15329366, now seen corresponding path program 20 times [2024-11-24 01:48:33,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:48:33,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645325791] [2024-11-24 01:48:33,738 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:48:33,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:48:51,001 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:48:51,001 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14699370 backedges. 13979 proven. 165889 refuted. 0 times theorem prover too weak. 14519502 trivial. 0 not checked. [2024-11-24 01:53:03,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:53:03,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645325791] [2024-11-24 01:53:03,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645325791] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:53:03,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131490210] [2024-11-24 01:53:03,562 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:53:03,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:53:03,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:53:03,566 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:53:03,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-24 01:53:09,364 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:53:09,364 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:53:09,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 34512 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-24 01:53:09,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:53:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14699370 backedges. 13979 proven. 165889 refuted. 0 times theorem prover too weak. 14519502 trivial. 0 not checked. [2024-11-24 01:53:10,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:54:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14699370 backedges. 13979 proven. 166149 refuted. 0 times theorem prover too weak. 14519242 trivial. 0 not checked. [2024-11-24 01:54:32,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131490210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:54:32,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:54:32,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 33 [2024-11-24 01:54:32,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647377720] [2024-11-24 01:54:32,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:54:32,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-24 01:54:32,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:54:32,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-24 01:54:32,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2024-11-24 01:54:32,357 INFO L87 Difference]: Start difference. First operand 187 states and 338 transitions. Second operand has 33 states, 31 states have (on average 3.225806451612903) internal successors, (100), 33 states have internal predecessors, (100), 30 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (43), 15 states have call predecessors, (43), 30 states have call successors, (43) [2024-11-24 01:54:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:54:33,212 INFO L93 Difference]: Finished difference Result 196 states and 366 transitions. [2024-11-24 01:54:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-24 01:54:33,213 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.225806451612903) internal successors, (100), 33 states have internal predecessors, (100), 30 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (43), 15 states have call predecessors, (43), 30 states have call successors, (43) Word has length 15535 [2024-11-24 01:54:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:54:33,246 INFO L225 Difference]: With dead ends: 196 [2024-11-24 01:54:33,246 INFO L226 Difference]: Without dead ends: 192 [2024-11-24 01:54:33,247 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31112 GetRequests, 31054 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=664, Invalid=1406, Unknown=0, NotChecked=0, Total=2070 [2024-11-24 01:54:33,248 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 225 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-24 01:54:33,248 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 140 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-24 01:54:33,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-24 01:54:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2024-11-24 01:54:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 131 states have internal predecessors, (137), 39 states have call successors, (39), 27 states have call predecessors, (39), 18 states have return successors, (186), 33 states have call predecessors, (186), 39 states have call successors, (186) [2024-11-24 01:54:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 362 transitions. [2024-11-24 01:54:33,288 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 362 transitions. Word has length 15535 [2024-11-24 01:54:33,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:54:33,303 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 362 transitions. [2024-11-24 01:54:33,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.225806451612903) internal successors, (100), 33 states have internal predecessors, (100), 30 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (43), 15 states have call predecessors, (43), 30 states have call successors, (43) [2024-11-24 01:54:33,303 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 362 transitions. [2024-11-24 01:54:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23639 [2024-11-24 01:54:36,887 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:54:36,890 INFO L218 NwaCegarLoop]: trace histogram [3471, 3471, 2808, 1735, 1735, 1735, 1735, 1735, 1735, 1735, 1073, 663, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:54:36,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-24 01:54:37,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:54:37,091 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:54:37,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:54:37,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1754690681, now seen corresponding path program 21 times [2024-11-24 01:54:37,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:54:37,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319100085] [2024-11-24 01:54:37,096 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:54:37,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:54:37,632 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2024-11-24 01:54:37,632 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:54:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 34046748 backedges. 22948 proven. 271326 refuted. 0 times theorem prover too weak. 33752474 trivial. 0 not checked. [2024-11-24 01:54:39,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:54:39,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319100085] [2024-11-24 01:54:39,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319100085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:54:39,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257859868] [2024-11-24 01:54:39,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:54:39,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:54:39,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:54:39,225 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:54:39,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-24 01:54:42,054 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2024-11-24 01:54:42,054 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:54:42,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-24 01:54:42,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:54:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 34046748 backedges. 22948 proven. 271326 refuted. 0 times theorem prover too weak. 33752474 trivial. 0 not checked. [2024-11-24 01:54:43,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:56:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34046748 backedges. 22948 proven. 271627 refuted. 0 times theorem prover too weak. 33752173 trivial. 0 not checked. [2024-11-24 01:56:46,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257859868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:56:46,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:56:46,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 35 [2024-11-24 01:56:46,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396094110] [2024-11-24 01:56:46,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:56:46,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-24 01:56:46,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:56:46,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-24 01:56:46,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2024-11-24 01:56:46,161 INFO L87 Difference]: Start difference. First operand 192 states and 362 transitions. Second operand has 35 states, 33 states have (on average 3.212121212121212) internal successors, (106), 35 states have internal predecessors, (106), 32 states have call successors, (33), 1 states have call predecessors, (33), 16 states have return successors, (46), 16 states have call predecessors, (46), 32 states have call successors, (46) [2024-11-24 01:56:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:56:46,619 INFO L93 Difference]: Finished difference Result 201 states and 392 transitions. [2024-11-24 01:56:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-24 01:56:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.212121212121212) internal successors, (106), 35 states have internal predecessors, (106), 32 states have call successors, (33), 1 states have call predecessors, (33), 16 states have return successors, (46), 16 states have call predecessors, (46), 32 states have call successors, (46) Word has length 23638 [2024-11-24 01:56:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:56:46,642 INFO L225 Difference]: With dead ends: 201 [2024-11-24 01:56:46,642 INFO L226 Difference]: Without dead ends: 197 [2024-11-24 01:56:46,643 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47321 GetRequests, 47259 SyntacticMatches, 15 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2024-11-24 01:56:46,644 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 141 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:56:46,644 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 151 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:56:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-24 01:56:46,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2024-11-24 01:56:46,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 134 states have internal predecessors, (140), 40 states have call successors, (40), 27 states have call predecessors, (40), 19 states have return successors, (208), 35 states have call predecessors, (208), 40 states have call successors, (208) [2024-11-24 01:56:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 388 transitions. [2024-11-24 01:56:46,671 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 388 transitions. Word has length 23638 [2024-11-24 01:56:46,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:56:46,684 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 388 transitions. [2024-11-24 01:56:46,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.212121212121212) internal successors, (106), 35 states have internal predecessors, (106), 32 states have call successors, (33), 1 states have call predecessors, (33), 16 states have return successors, (46), 16 states have call predecessors, (46), 32 states have call successors, (46) [2024-11-24 01:56:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 388 transitions. [2024-11-24 01:56:56,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46422 [2024-11-24 01:56:56,141 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:56:56,144 INFO L218 NwaCegarLoop]: trace histogram [6817, 6817, 5515, 3408, 3408, 3408, 3408, 3408, 3408, 3408, 2107, 1302, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:56:56,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-24 01:56:56,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a28a49-ba56-441d-b368-9904e5be29a2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:56:56,345 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:56:56,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:56:56,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1302561006, now seen corresponding path program 22 times [2024-11-24 01:56:56,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:56:56,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457536016] [2024-11-24 01:56:56,355 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:56:56,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms