./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 16:05:52,369 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 16:05:52,498 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 16:05:52,507 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 16:05:52,509 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 16:05:52,550 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 16:05:52,551 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 16:05:52,551 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 16:05:52,552 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 16:05:52,552 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 16:05:52,552 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 16:05:52,552 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 16:05:52,553 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 16:05:52,553 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 16:05:52,553 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 16:05:52,554 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 16:05:52,554 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 16:05:52,554 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 16:05:52,554 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 16:05:52,554 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 16:05:52,555 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 16:05:52,555 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 16:05:52,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 16:05:52,555 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 16:05:52,555 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 16:05:52,555 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 16:05:52,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 16:05:52,556 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 16:05:52,556 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 16:05:52,556 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 16:05:52,556 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 16:05:52,556 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 16:05:52,556 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:05:52,557 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 16:05:52,557 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 16:05:52,557 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 16:05:52,557 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 16:05:52,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 16:05:52,557 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 16:05:52,557 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 16:05:52,557 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 16:05:52,557 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 16:05:52,558 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_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af [2024-11-13 16:05:52,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 16:05:52,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 16:05:52,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 16:05:52,993 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 16:05:52,993 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 16:05:52,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c Unable to find full path for "g++" [2024-11-13 16:05:54,962 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 16:05:55,303 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 16:05:55,304 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2024-11-13 16:05:55,314 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/data/a8b404616/b416f6ca6bfc4a54b443791cbc1309bb/FLAG77e82e00e [2024-11-13 16:05:55,333 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/data/a8b404616/b416f6ca6bfc4a54b443791cbc1309bb [2024-11-13 16:05:55,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 16:05:55,338 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 16:05:55,340 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 16:05:55,340 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 16:05:55,346 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 16:05:55,348 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,349 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fdd8010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55, skipping insertion in model container [2024-11-13 16:05:55,349 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,368 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 16:05:55,544 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_853116ff-6337-4abf-9c66-1eb33bfce326/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2024-11-13 16:05:55,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:05:55,577 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 16:05:55,589 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_853116ff-6337-4abf-9c66-1eb33bfce326/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2024-11-13 16:05:55,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:05:55,620 INFO L204 MainTranslator]: Completed translation [2024-11-13 16:05:55,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55 WrapperNode [2024-11-13 16:05:55,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 16:05:55,622 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 16:05:55,622 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 16:05:55,622 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 16:05:55,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,640 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,661 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2024-11-13 16:05:55,662 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 16:05:55,665 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 16:05:55,665 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 16:05:55,665 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 16:05:55,676 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,679 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,699 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 2, 9, 8, 12]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 2, 2, 2]. [2024-11-13 16:05:55,699 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,700 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,707 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,709 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,711 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,712 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,715 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 16:05:55,716 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 16:05:55,716 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 16:05:55,717 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 16:05:55,718 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (1/1) ... [2024-11-13 16:05:55,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:05:55,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:05:55,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 16:05:55,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 16:05:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 16:05:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 16:05:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 16:05:55,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-13 16:05:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-13 16:05:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-13 16:05:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 16:05:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 16:05:55,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 16:05:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-13 16:05:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-13 16:05:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-13 16:05:55,802 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2024-11-13 16:05:55,802 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2024-11-13 16:05:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 16:05:55,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 16:05:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 16:05:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 16:05:55,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-13 16:05:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-13 16:05:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-13 16:05:55,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 16:05:55,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 16:05:55,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 16:05:55,962 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 16:05:55,965 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 16:05:56,269 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-13 16:05:56,269 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 16:05:56,281 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 16:05:56,281 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-13 16:05:56,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:05:56 BoogieIcfgContainer [2024-11-13 16:05:56,284 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 16:05:56,286 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 16:05:56,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 16:05:56,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 16:05:56,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 04:05:55" (1/3) ... [2024-11-13 16:05:56,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3bdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:05:56, skipping insertion in model container [2024-11-13 16:05:56,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:05:55" (2/3) ... [2024-11-13 16:05:56,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b3bdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:05:56, skipping insertion in model container [2024-11-13 16:05:56,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:05:56" (3/3) ... [2024-11-13 16:05:56,297 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2024-11-13 16:05:56,319 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 16:05:56,321 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_sqrt1-ll.c that has 3 procedures, 31 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-13 16:05:56,401 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:05:56,422 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;@bc6a973, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:05:56,422 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 16:05:56,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 16:05:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 16:05:56,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:05:56,440 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:05:56,440 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:05:56,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:05:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash 970534123, now seen corresponding path program 1 times [2024-11-13 16:05:56,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:05:56,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574103150] [2024-11-13 16:05:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:05:56,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:05:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:05:57,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:05:57,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574103150] [2024-11-13 16:05:57,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574103150] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:05:57,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:05:57,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 16:05:57,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110810445] [2024-11-13 16:05:57,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:05:57,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 16:05:57,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:05:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 16:05:57,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 16:05:57,651 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:05:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:05:58,046 INFO L93 Difference]: Finished difference Result 77 states and 110 transitions. [2024-11-13 16:05:58,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 16:05:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-13 16:05:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:05:58,057 INFO L225 Difference]: With dead ends: 77 [2024-11-13 16:05:58,058 INFO L226 Difference]: Without dead ends: 45 [2024-11-13 16:05:58,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:05:58,068 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:05:58,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:05:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-13 16:05:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2024-11-13 16:05:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-13 16:05:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2024-11-13 16:05:58,131 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 9 [2024-11-13 16:05:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:05:58,133 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2024-11-13 16:05:58,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:05:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2024-11-13 16:05:58,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 16:05:58,134 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:05:58,134 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:05:58,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 16:05:58,135 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:05:58,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:05:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash 833326136, now seen corresponding path program 1 times [2024-11-13 16:05:58,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:05:58,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789187278] [2024-11-13 16:05:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:05:58,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:05:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 16:05:58,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013829905] [2024-11-13 16:05:58,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:05:58,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:05:58,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:05:58,199 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:05:58,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 16:05:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:58,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-13 16:05:58,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:05:58,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:05:58,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:05:58,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 16:05:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:05:59,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:05:59,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 16:05:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:05:59,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:05:59,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789187278] [2024-11-13 16:05:59,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 16:05:59,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013829905] [2024-11-13 16:05:59,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013829905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:05:59,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:05:59,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2024-11-13 16:05:59,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047156515] [2024-11-13 16:05:59,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:05:59,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 16:05:59,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:05:59,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 16:05:59,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-13 16:05:59,646 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 16:06:04,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-13 16:06:04,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:06:04,576 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2024-11-13 16:06:04,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 16:06:04,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-11-13 16:06:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:06:04,579 INFO L225 Difference]: With dead ends: 60 [2024-11-13 16:06:04,579 INFO L226 Difference]: Without dead ends: 58 [2024-11-13 16:06:04,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2024-11-13 16:06:04,581 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-13 16:06:04,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 131 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 287 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2024-11-13 16:06:04,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-13 16:06:04,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-11-13 16:06:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 37 states have internal predecessors, (39), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2024-11-13 16:06:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2024-11-13 16:06:04,602 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 15 [2024-11-13 16:06:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:06:04,602 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2024-11-13 16:06:04,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 16:06:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2024-11-13 16:06:04,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-13 16:06:04,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:06:04,604 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:06:04,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 16:06:04,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:06:04,805 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:06:04,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:06:04,807 INFO L85 PathProgramCache]: Analyzing trace with hash -524204349, now seen corresponding path program 1 times [2024-11-13 16:06:04,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:06:04,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539216022] [2024-11-13 16:06:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:04,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:06:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 16:06:04,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653861572] [2024-11-13 16:06:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:04,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:06:04,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:06:04,867 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:06:04,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 16:06:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:05,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 16:06:05,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:06:05,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:06:05,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:06:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:06:05,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:06:06,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-11-13 16:06:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:06:06,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:06:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539216022] [2024-11-13 16:06:06,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 16:06:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653861572] [2024-11-13 16:06:06,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653861572] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:06:06,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:06:06,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2024-11-13 16:06:06,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679265900] [2024-11-13 16:06:06,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:06:06,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 16:06:06,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:06:06,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 16:06:06,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-11-13 16:06:06,595 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 16:06:13,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-13 16:06:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:06:13,383 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2024-11-13 16:06:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 16:06:13,384 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2024-11-13 16:06:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:06:13,389 INFO L225 Difference]: With dead ends: 83 [2024-11-13 16:06:13,390 INFO L226 Difference]: Without dead ends: 81 [2024-11-13 16:06:13,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 16:06:13,394 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 83 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:06:13,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 118 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 313 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2024-11-13 16:06:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-13 16:06:13,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2024-11-13 16:06:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 52 states have internal predecessors, (54), 18 states have call successors, (18), 9 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2024-11-13 16:06:13,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2024-11-13 16:06:13,438 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 21 [2024-11-13 16:06:13,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:06:13,439 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2024-11-13 16:06:13,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 16:06:13,439 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2024-11-13 16:06:13,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 16:06:13,440 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:06:13,440 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:06:13,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 16:06:13,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:06:13,641 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:06:13,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:06:13,642 INFO L85 PathProgramCache]: Analyzing trace with hash 966907610, now seen corresponding path program 1 times [2024-11-13 16:06:13,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:06:13,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501788072] [2024-11-13 16:06:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:13,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:06:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:14,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 16:06:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:14,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:06:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:14,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 16:06:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:06:14,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:06:14,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501788072] [2024-11-13 16:06:14,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501788072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:06:14,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842688913] [2024-11-13 16:06:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:14,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:06:14,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:06:14,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:06:14,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 16:06:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:15,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-13 16:06:15,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:06:15,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-11-13 16:06:15,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-11-13 16:06:15,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-13 16:06:15,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 16:06:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:06:15,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:06:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 16:06:20,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842688913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:06:20,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:06:20,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2024-11-13 16:06:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32244034] [2024-11-13 16:06:20,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:06:20,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 16:06:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:06:20,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 16:06:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2024-11-13 16:06:20,510 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-13 16:06:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:06:23,044 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2024-11-13 16:06:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 16:06:23,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) Word has length 31 [2024-11-13 16:06:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:06:23,047 INFO L225 Difference]: With dead ends: 88 [2024-11-13 16:06:23,047 INFO L226 Difference]: Without dead ends: 86 [2024-11-13 16:06:23,048 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2024-11-13 16:06:23,049 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:06:23,049 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 166 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-13 16:06:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-13 16:06:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-13 16:06:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 57 states have internal predecessors, (59), 18 states have call successors, (18), 10 states have call predecessors, (18), 13 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-13 16:06:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2024-11-13 16:06:23,080 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 31 [2024-11-13 16:06:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:06:23,081 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2024-11-13 16:06:23,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-13 16:06:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2024-11-13 16:06:23,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 16:06:23,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:06:23,082 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:06:23,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 16:06:23,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:06:23,283 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:06:23,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:06:23,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1870103408, now seen corresponding path program 1 times [2024-11-13 16:06:23,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:06:23,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497170019] [2024-11-13 16:06:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:23,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:06:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:23,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:06:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:24,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:06:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:24,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 16:06:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:24,038 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-13 16:06:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:06:24,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:06:24,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497170019] [2024-11-13 16:06:24,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497170019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:06:24,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:06:24,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 16:06:24,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313537075] [2024-11-13 16:06:24,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:06:24,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 16:06:24,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:06:24,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 16:06:24,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-13 16:06:24,049 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:06:24,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:06:24,769 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2024-11-13 16:06:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:06:24,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2024-11-13 16:06:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:06:24,772 INFO L225 Difference]: With dead ends: 92 [2024-11-13 16:06:24,772 INFO L226 Difference]: Without dead ends: 90 [2024-11-13 16:06:24,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:06:24,774 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:06:24,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 65 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 16:06:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-13 16:06:24,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-13 16:06:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.087719298245614) internal successors, (62), 60 states have internal predecessors, (62), 18 states have call successors, (18), 11 states have call predecessors, (18), 14 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-13 16:06:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2024-11-13 16:06:24,807 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 31 [2024-11-13 16:06:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:06:24,808 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2024-11-13 16:06:24,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:06:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2024-11-13 16:06:24,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 16:06:24,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:06:24,810 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:06:24,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 16:06:24,810 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:06:24,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:06:24,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1685928217, now seen corresponding path program 2 times [2024-11-13 16:06:24,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:06:24,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647639735] [2024-11-13 16:06:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:24,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:06:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 16:06:24,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224124493] [2024-11-13 16:06:24,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:06:24,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:06:24,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:06:24,847 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:06:24,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 16:06:25,003 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:06:25,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:06:25,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-13 16:06:25,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:06:25,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:06:25,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:06:26,771 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-11-13 16:06:26,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-11-13 16:06:26,870 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-11-13 16:06:26,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-11-13 16:06:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:06:27,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:06:29,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2024-11-13 16:06:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 16:06:29,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:06:29,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647639735] [2024-11-13 16:06:29,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 16:06:29,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224124493] [2024-11-13 16:06:29,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224124493] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:06:29,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:06:29,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 25 [2024-11-13 16:06:29,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93867758] [2024-11-13 16:06:29,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:06:29,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 16:06:29,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:06:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 16:06:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-11-13 16:06:29,210 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 25 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 10 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 16:06:35,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:06:35,041 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2024-11-13 16:06:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 16:06:35,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 10 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 37 [2024-11-13 16:06:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:06:35,044 INFO L225 Difference]: With dead ends: 118 [2024-11-13 16:06:35,044 INFO L226 Difference]: Without dead ends: 116 [2024-11-13 16:06:35,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=341, Invalid=2209, Unknown=0, NotChecked=0, Total=2550 [2024-11-13 16:06:35,047 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 89 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-13 16:06:35,048 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 220 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-13 16:06:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-13 16:06:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2024-11-13 16:06:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 75 states have internal predecessors, (78), 21 states have call successors, (21), 15 states have call predecessors, (21), 18 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2024-11-13 16:06:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2024-11-13 16:06:35,097 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 37 [2024-11-13 16:06:35,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:06:35,097 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2024-11-13 16:06:35,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.0) internal successors, (38), 20 states have internal predecessors, (38), 10 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 16:06:35,098 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2024-11-13 16:06:35,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 16:06:35,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:06:35,099 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:06:35,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 16:06:35,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 16:06:35,303 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:06:35,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:06:35,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1074355171, now seen corresponding path program 1 times [2024-11-13 16:06:35,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:06:35,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239654882] [2024-11-13 16:06:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:35,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:06:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 16:06:35,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697720250] [2024-11-13 16:06:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:35,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:06:35,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:06:35,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:06:35,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 16:06:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:35,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 16:06:35,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:06:35,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:06:35,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:06:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:06:36,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:06:36,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:06:36,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239654882] [2024-11-13 16:06:36,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 16:06:36,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697720250] [2024-11-13 16:06:36,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697720250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:06:36,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:06:36,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-11-13 16:06:36,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823353089] [2024-11-13 16:06:36,653 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-13 16:06:36,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 16:06:36,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:06:36,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 16:06:36,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:06:36,655 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 16:06:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:06:37,590 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2024-11-13 16:06:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 16:06:37,590 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2024-11-13 16:06:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:06:37,592 INFO L225 Difference]: With dead ends: 120 [2024-11-13 16:06:37,592 INFO L226 Difference]: Without dead ends: 116 [2024-11-13 16:06:37,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-13 16:06:37,593 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:06:37,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 65 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 150 Invalid, 2 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 16:06:37,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-13 16:06:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2024-11-13 16:06:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 76 states have internal predecessors, (79), 21 states have call successors, (21), 16 states have call predecessors, (21), 18 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2024-11-13 16:06:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2024-11-13 16:06:37,635 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 37 [2024-11-13 16:06:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:06:37,635 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2024-11-13 16:06:37,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 16:06:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2024-11-13 16:06:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 16:06:37,637 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:06:37,637 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:06:37,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 16:06:37,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 16:06:37,838 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:06:37,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:06:37,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1581315816, now seen corresponding path program 1 times [2024-11-13 16:06:37,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:06:37,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417434653] [2024-11-13 16:06:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:37,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:06:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 16:06:37,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403115637] [2024-11-13 16:06:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:37,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:06:37,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:06:37,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:06:37,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 16:06:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:38,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 16:06:38,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:06:38,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:06:38,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:06:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:06:38,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:06:39,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:06:39,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417434653] [2024-11-13 16:06:39,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 16:06:39,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403115637] [2024-11-13 16:06:39,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403115637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:06:39,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:06:39,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-11-13 16:06:39,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549747760] [2024-11-13 16:06:39,568 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-13 16:06:39,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 16:06:39,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:06:39,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 16:06:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:06:39,569 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:06:40,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:06:40,511 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2024-11-13 16:06:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 16:06:40,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-11-13 16:06:40,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:06:40,514 INFO L225 Difference]: With dead ends: 116 [2024-11-13 16:06:40,514 INFO L226 Difference]: Without dead ends: 96 [2024-11-13 16:06:40,515 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-13 16:06:40,516 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 21 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:06:40,516 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 65 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 141 Invalid, 3 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 16:06:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-13 16:06:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-13 16:06:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.064516129032258) internal successors, (66), 64 states have internal predecessors, (66), 18 states have call successors, (18), 13 states have call predecessors, (18), 15 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2024-11-13 16:06:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2024-11-13 16:06:40,552 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 43 [2024-11-13 16:06:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:06:40,553 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2024-11-13 16:06:40,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:06:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2024-11-13 16:06:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 16:06:40,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:06:40,555 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:06:40,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 16:06:40,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:06:40,756 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:06:40,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:06:40,757 INFO L85 PathProgramCache]: Analyzing trace with hash 697696318, now seen corresponding path program 1 times [2024-11-13 16:06:40,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:06:40,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422600876] [2024-11-13 16:06:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:40,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:06:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:41,767 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:06:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:42,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:06:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:42,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 16:06:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:42,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-13 16:06:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:42,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 16:06:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:43,065 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:06:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:43,072 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 16:06:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:43,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-13 16:06:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-13 16:06:43,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:06:43,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422600876] [2024-11-13 16:06:43,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422600876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:06:43,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097721571] [2024-11-13 16:06:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:43,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:06:43,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:06:43,092 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:06:43,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 16:06:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:43,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 16:06:43,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:06:43,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:06:43,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:06:44,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 16:06:44,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 16:06:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-13 16:06:44,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:06:45,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-13 16:06:45,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-11-13 16:06:45,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097721571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:06:45,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:06:45,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2024-11-13 16:06:45,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026291641] [2024-11-13 16:06:45,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:06:45,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 16:06:45,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:06:45,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 16:06:45,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-11-13 16:06:45,890 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-13 16:06:47,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:06:47,574 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2024-11-13 16:06:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 16:06:47,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 55 [2024-11-13 16:06:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:06:47,578 INFO L225 Difference]: With dead ends: 102 [2024-11-13 16:06:47,578 INFO L226 Difference]: Without dead ends: 100 [2024-11-13 16:06:47,579 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-11-13 16:06:47,579 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:06:47,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 88 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 16:06:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-13 16:06:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-11-13 16:06:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 67 states have internal predecessors, (69), 18 states have call successors, (18), 14 states have call predecessors, (18), 16 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2024-11-13 16:06:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2024-11-13 16:06:47,617 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 55 [2024-11-13 16:06:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:06:47,617 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2024-11-13 16:06:47,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-13 16:06:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2024-11-13 16:06:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 16:06:47,618 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:06:47,618 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:06:47,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 16:06:47,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:06:47,819 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:06:47,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:06:47,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1611803979, now seen corresponding path program 1 times [2024-11-13 16:06:47,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:06:47,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369059712] [2024-11-13 16:06:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:47,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:06:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-13 16:06:47,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401218798] [2024-11-13 16:06:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:06:47,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:06:47,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:06:47,870 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:06:47,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853116ff-6337-4abf-9c66-1eb33bfce326/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 16:06:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:06:48,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-13 16:06:48,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:06:48,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 16:06:48,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 16:06:48,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 16:06:52,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2024-11-13 16:06:52,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 16:06:52,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:06:52,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 62 [2024-11-13 16:07:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 63 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:07:13,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:07:25,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2024-11-13 16:07:25,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:07:25,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369059712] [2024-11-13 16:07:25,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-13 16:07:25,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401218798] [2024-11-13 16:07:25,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401218798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:07:25,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:07:25,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-11-13 16:07:25,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084130464] [2024-11-13 16:07:25,370 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-13 16:07:25,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 16:07:25,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:07:25,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 16:07:25,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1058, Unknown=8, NotChecked=0, Total=1190 [2024-11-13 16:07:25,372 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 28 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 20 states have internal predecessors, (36), 8 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-13 16:07:29,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-13 16:07:37,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-13 16:07:41,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-13 16:07:46,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-13 16:07:55,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-13 16:08:06,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-13 16:08:10,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-13 16:08:14,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-13 16:08:18,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-13 16:08:22,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]