./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_10-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB --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 ad793266928b7f31f4ee1b23974468bb9f6761486c9c1aae6fbee8a7b7aca3db --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:51:23,368 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:51:23,477 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:51:23,484 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:51:23,485 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:51:23,532 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:51:23,533 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:51:23,533 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:51:23,533 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:51:23,533 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:51:23,534 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:51:23,534 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:51:23,534 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:51:23,535 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:51:23,537 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:51:23,537 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:51:23,537 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:51:23,538 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:51:23,538 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:51:23,538 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:51:23,538 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:51:23,539 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:51:23,539 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:51:23,539 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:51:23,539 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:51:23,539 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:51:23,540 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:51:23,540 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:51:23,540 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:51:23,540 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:51:23,541 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:51:23,541 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:51:23,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:51:23,541 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:51:23,541 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:51:23,541 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:51:23,541 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:51:23,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:51:23,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:51:23,542 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:51:23,542 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:51:23,542 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:51:23,542 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:51:23,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:51:23,542 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:51:23,542 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:51:23,543 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:51:23,543 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:51:23,543 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_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB 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 -> ad793266928b7f31f4ee1b23974468bb9f6761486c9c1aae6fbee8a7b7aca3db [2024-11-28 04:51:23,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:51:23,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:51:23,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:51:23,959 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:51:23,960 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:51:23,962 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursive-simple/fibo_2calls_10-2.c [2024-11-28 04:51:26,887 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/data/11249d582/0e13a93568f6412bb14c7cd79714402e/FLAG6cd436563 [2024-11-28 04:51:27,202 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:51:27,203 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/sv-benchmarks/c/recursive-simple/fibo_2calls_10-2.c [2024-11-28 04:51:27,216 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/data/11249d582/0e13a93568f6412bb14c7cd79714402e/FLAG6cd436563 [2024-11-28 04:51:27,238 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/data/11249d582/0e13a93568f6412bb14c7cd79714402e [2024-11-28 04:51:27,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:51:27,244 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:51:27,245 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:51:27,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:51:27,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:51:27,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52f3a5ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27, skipping insertion in model container [2024-11-28 04:51:27,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,272 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:51:27,450 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_09889f01-7d91-4c08-b54d-b938343744e2/sv-benchmarks/c/recursive-simple/fibo_2calls_10-2.c[949,962] [2024-11-28 04:51:27,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:51:27,463 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:51:27,482 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_09889f01-7d91-4c08-b54d-b938343744e2/sv-benchmarks/c/recursive-simple/fibo_2calls_10-2.c[949,962] [2024-11-28 04:51:27,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:51:27,498 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:51:27,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27 WrapperNode [2024-11-28 04:51:27,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:51:27,501 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:51:27,501 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:51:27,501 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:51:27,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,517 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,533 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-28 04:51:27,534 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:51:27,534 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:51:27,534 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:51:27,534 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:51:27,544 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,546 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,566 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 04:51:27,567 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,567 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,571 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,572 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,577 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,578 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,579 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,580 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:51:27,581 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:51:27,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:51:27,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:51:27,582 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (1/1) ... [2024-11-28 04:51:27,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:51:27,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:27,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:51:27,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:51:27,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:51:27,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:51:27,651 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-11-28 04:51:27,651 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-11-28 04:51:27,652 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-11-28 04:51:27,652 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-11-28 04:51:27,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:51:27,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:51:27,717 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:51:27,720 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:51:27,893 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-28 04:51:27,896 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:51:27,910 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:51:27,910 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-28 04:51:27,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:51:27 BoogieIcfgContainer [2024-11-28 04:51:27,911 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:51:27,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:51:27,915 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:51:27,920 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:51:27,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:51:27" (1/3) ... [2024-11-28 04:51:27,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5faec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:51:27, skipping insertion in model container [2024-11-28 04:51:27,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:27" (2/3) ... [2024-11-28 04:51:27,923 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e5faec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:51:27, skipping insertion in model container [2024-11-28 04:51:27,924 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:51:27" (3/3) ... [2024-11-28 04:51:27,925 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-2.c [2024-11-28 04:51:27,939 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:51:27,941 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_10-2.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-28 04:51:28,001 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:51:28,014 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;@5a8ef9cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:51:28,014 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:51:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 04:51:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 04:51:28,024 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:28,024 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:28,025 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:28,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:28,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2024-11-28 04:51:28,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:28,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360219697] [2024-11-28 04:51:28,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:28,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:51:28,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:28,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360219697] [2024-11-28 04:51:28,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360219697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:28,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:28,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:51:28,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897204943] [2024-11-28 04:51:28,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:28,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:51:28,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:28,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:51:28,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:51:28,343 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:51:28,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:28,415 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-11-28 04:51:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:51:28,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-28 04:51:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:28,429 INFO L225 Difference]: With dead ends: 39 [2024-11-28 04:51:28,429 INFO L226 Difference]: Without dead ends: 27 [2024-11-28 04:51:28,433 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:51:28,436 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:28,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:51:28,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-28 04:51:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-28 04:51:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-28 04:51:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-28 04:51:28,472 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-11-28 04:51:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:28,472 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-28 04:51:28,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:51:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-28 04:51:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-28 04:51:28,473 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:28,474 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:28,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:51:28,474 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:28,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:28,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2024-11-28 04:51:28,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:28,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176953711] [2024-11-28 04:51:28,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:28,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:51:28,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:28,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176953711] [2024-11-28 04:51:28,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176953711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:28,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:28,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:51:28,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932926101] [2024-11-28 04:51:28,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:28,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:51:28,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:28,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:51:28,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:51:28,598 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:51:28,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:28,631 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-28 04:51:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:51:28,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-28 04:51:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:28,635 INFO L225 Difference]: With dead ends: 33 [2024-11-28 04:51:28,636 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 04:51:28,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:51:28,638 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:28,640 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:51:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 04:51:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-28 04:51:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-28 04:51:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-28 04:51:28,650 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2024-11-28 04:51:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:28,650 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-28 04:51:28,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 04:51:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-28 04:51:28,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 04:51:28,652 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:28,652 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:28,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:51:28,652 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:28,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:28,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2024-11-28 04:51:28,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:28,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323401665] [2024-11-28 04:51:28,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:28,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:51:28,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:28,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323401665] [2024-11-28 04:51:28,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323401665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:28,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776944147] [2024-11-28 04:51:28,819 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:28,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:28,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:28,825 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:28,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:51:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:28,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:51:28,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:51:29,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:51:29,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776944147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:29,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:51:29,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-11-28 04:51:29,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262871104] [2024-11-28 04:51:29,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:29,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:51:29,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:29,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:51:29,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:51:29,429 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:51:29,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:29,603 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2024-11-28 04:51:29,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:51:29,604 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2024-11-28 04:51:29,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:29,607 INFO L225 Difference]: With dead ends: 55 [2024-11-28 04:51:29,607 INFO L226 Difference]: Without dead ends: 31 [2024-11-28 04:51:29,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:51:29,608 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:29,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-28 04:51:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-11-28 04:51:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:51:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-28 04:51:29,623 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2024-11-28 04:51:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:29,623 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-28 04:51:29,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:51:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-28 04:51:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-28 04:51:29,628 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:29,628 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:29,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:29,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:29,832 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:29,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:29,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2024-11-28 04:51:29,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:29,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195078558] [2024-11-28 04:51:29,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:29,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:51:29,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:29,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195078558] [2024-11-28 04:51:29,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195078558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:29,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960150206] [2024-11-28 04:51:29,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:29,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:29,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:29,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:29,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:51:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:30,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:51:30,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:51:30,101 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:51:30,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960150206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:30,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:51:30,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-28 04:51:30,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763963835] [2024-11-28 04:51:30,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:30,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:51:30,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:30,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:51:30,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:51:30,387 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 04:51:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:30,575 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-28 04:51:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:51:30,576 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-11-28 04:51:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:30,577 INFO L225 Difference]: With dead ends: 40 [2024-11-28 04:51:30,577 INFO L226 Difference]: Without dead ends: 36 [2024-11-28 04:51:30,577 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:51:30,578 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:30,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:51:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-28 04:51:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-11-28 04:51:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-28 04:51:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-11-28 04:51:30,598 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2024-11-28 04:51:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:30,599 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-11-28 04:51:30,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 04:51:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-11-28 04:51:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:51:30,600 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:30,600 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:30,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:30,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:30,801 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:30,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:30,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2024-11-28 04:51:30,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:30,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428753349] [2024-11-28 04:51:30,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:30,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:51:31,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:31,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428753349] [2024-11-28 04:51:31,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428753349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:31,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981490745] [2024-11-28 04:51:31,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:31,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:31,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:31,013 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:31,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:51:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:31,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:51:31,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:51:31,186 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:51:31,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981490745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:31,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:51:31,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-11-28 04:51:31,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961745828] [2024-11-28 04:51:31,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:31,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:51:31,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:31,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:51:31,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:51:31,691 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-28 04:51:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:31,942 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2024-11-28 04:51:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:51:31,942 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2024-11-28 04:51:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:31,944 INFO L225 Difference]: With dead ends: 69 [2024-11-28 04:51:31,944 INFO L226 Difference]: Without dead ends: 38 [2024-11-28 04:51:31,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:51:31,949 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:31,949 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:51:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-28 04:51:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-28 04:51:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-28 04:51:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-11-28 04:51:31,964 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2024-11-28 04:51:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:31,968 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-11-28 04:51:31,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-28 04:51:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-11-28 04:51:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 04:51:31,969 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:31,969 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:31,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:51:32,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:32,170 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:32,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:32,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2024-11-28 04:51:32,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:32,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531531966] [2024-11-28 04:51:32,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:32,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:51:32,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:32,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531531966] [2024-11-28 04:51:32,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531531966] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:32,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698768828] [2024-11-28 04:51:32,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:32,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:32,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:32,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:32,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:51:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:32,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:51:32,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:51:32,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:51:33,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698768828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:33,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:51:33,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-11-28 04:51:33,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423039180] [2024-11-28 04:51:33,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:33,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:51:33,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:33,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:51:33,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:51:33,015 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-28 04:51:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:33,588 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2024-11-28 04:51:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 04:51:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2024-11-28 04:51:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:33,591 INFO L225 Difference]: With dead ends: 101 [2024-11-28 04:51:33,591 INFO L226 Difference]: Without dead ends: 68 [2024-11-28 04:51:33,593 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:51:33,595 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:33,595 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:51:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-28 04:51:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2024-11-28 04:51:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2024-11-28 04:51:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2024-11-28 04:51:33,613 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2024-11-28 04:51:33,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:33,614 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2024-11-28 04:51:33,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-28 04:51:33,614 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2024-11-28 04:51:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 04:51:33,617 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:33,617 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:33,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:51:33,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:33,821 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:33,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:33,822 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2024-11-28 04:51:33,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:33,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283473423] [2024-11-28 04:51:33,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:33,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 04:51:34,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:34,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283473423] [2024-11-28 04:51:34,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283473423] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:34,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049584088] [2024-11-28 04:51:34,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:34,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:34,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:34,093 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:34,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:51:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:34,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:51:34,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 04:51:34,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:51:34,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049584088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:34,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:51:34,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-11-28 04:51:34,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896259844] [2024-11-28 04:51:34,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:34,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:51:34,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:34,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:51:34,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:51:34,984 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-28 04:51:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:35,294 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2024-11-28 04:51:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:51:35,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2024-11-28 04:51:35,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:35,299 INFO L225 Difference]: With dead ends: 102 [2024-11-28 04:51:35,303 INFO L226 Difference]: Without dead ends: 98 [2024-11-28 04:51:35,304 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:51:35,306 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:35,309 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 161 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:51:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-28 04:51:35,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2024-11-28 04:51:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2024-11-28 04:51:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2024-11-28 04:51:35,344 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2024-11-28 04:51:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:35,344 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2024-11-28 04:51:35,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-28 04:51:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2024-11-28 04:51:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-28 04:51:35,349 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:35,349 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:35,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:51:35,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 04:51:35,554 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:35,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:35,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1770426885, now seen corresponding path program 1 times [2024-11-28 04:51:35,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:35,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742994748] [2024-11-28 04:51:35,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:35,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-11-28 04:51:35,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:35,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742994748] [2024-11-28 04:51:35,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742994748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:35,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392384970] [2024-11-28 04:51:35,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:35,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:35,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:35,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:35,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:51:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:35,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:51:35,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-28 04:51:36,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-28 04:51:37,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392384970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:37,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:51:37,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2024-11-28 04:51:37,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263910140] [2024-11-28 04:51:37,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:37,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:51:37,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:37,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:51:37,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:51:37,276 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-11-28 04:51:38,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:38,047 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2024-11-28 04:51:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 04:51:38,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 107 [2024-11-28 04:51:38,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:38,051 INFO L225 Difference]: With dead ends: 177 [2024-11-28 04:51:38,051 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 04:51:38,057 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:51:38,062 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:38,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 352 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:51:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 04:51:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2024-11-28 04:51:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2024-11-28 04:51:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2024-11-28 04:51:38,102 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2024-11-28 04:51:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:38,106 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2024-11-28 04:51:38,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-11-28 04:51:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2024-11-28 04:51:38,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-28 04:51:38,110 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:38,111 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:38,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 04:51:38,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 04:51:38,315 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:38,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:38,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1566869308, now seen corresponding path program 1 times [2024-11-28 04:51:38,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:38,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081981386] [2024-11-28 04:51:38,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:38,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2024-11-28 04:51:38,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:38,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081981386] [2024-11-28 04:51:38,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081981386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:38,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125822382] [2024-11-28 04:51:38,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:38,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:38,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:38,628 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:38,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:51:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:38,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:51:38,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2024-11-28 04:51:38,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 29 proven. 228 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2024-11-28 04:51:40,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125822382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:40,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:51:40,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2024-11-28 04:51:40,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090311143] [2024-11-28 04:51:40,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:40,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:51:40,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:40,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:51:40,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:51:40,600 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-11-28 04:51:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:40,974 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2024-11-28 04:51:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:51:40,975 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 146 [2024-11-28 04:51:40,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:40,978 INFO L225 Difference]: With dead ends: 132 [2024-11-28 04:51:40,978 INFO L226 Difference]: Without dead ends: 128 [2024-11-28 04:51:40,981 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 276 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:51:40,982 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:40,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 209 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:51:40,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-28 04:51:41,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2024-11-28 04:51:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2024-11-28 04:51:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2024-11-28 04:51:41,026 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 146 [2024-11-28 04:51:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:41,027 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2024-11-28 04:51:41,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-11-28 04:51:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2024-11-28 04:51:41,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-11-28 04:51:41,034 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:41,034 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 18, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:41,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:51:41,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:41,239 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:41,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:41,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1279109938, now seen corresponding path program 2 times [2024-11-28 04:51:41,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:41,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819089376] [2024-11-28 04:51:41,240 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:51:41,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:41,305 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:51:41,305 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 158 proven. 490 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2024-11-28 04:51:41,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:41,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819089376] [2024-11-28 04:51:41,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819089376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:41,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912039813] [2024-11-28 04:51:41,854 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:51:41,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:41,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:41,856 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:41,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:51:42,014 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:51:42,014 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:42,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:51:42,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 569 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2024-11-28 04:51:42,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 593 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2024-11-28 04:51:44,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912039813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:44,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:51:44,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 29 [2024-11-28 04:51:44,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896138436] [2024-11-28 04:51:44,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:44,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:51:44,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:44,545 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:51:44,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:51:44,546 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-11-28 04:51:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:45,603 INFO L93 Difference]: Finished difference Result 323 states and 666 transitions. [2024-11-28 04:51:45,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 04:51:45,604 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) Word has length 284 [2024-11-28 04:51:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:45,610 INFO L225 Difference]: With dead ends: 323 [2024-11-28 04:51:45,610 INFO L226 Difference]: Without dead ends: 214 [2024-11-28 04:51:45,613 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 547 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2024-11-28 04:51:45,613 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 129 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:45,614 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 481 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:51:45,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-28 04:51:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2024-11-28 04:51:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 35 states have call successors, (35), 17 states have call predecessors, (35), 25 states have return successors, (120), 43 states have call predecessors, (120), 35 states have call successors, (120) [2024-11-28 04:51:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 301 transitions. [2024-11-28 04:51:45,658 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 301 transitions. Word has length 284 [2024-11-28 04:51:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:45,658 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 301 transitions. [2024-11-28 04:51:45,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-11-28 04:51:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 301 transitions. [2024-11-28 04:51:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2024-11-28 04:51:45,665 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:45,665 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 23, 23, 20, 18, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:45,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:51:45,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:45,870 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:45,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:45,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1509408310, now seen corresponding path program 3 times [2024-11-28 04:51:45,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:45,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921598851] [2024-11-28 04:51:45,871 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:51:45,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:45,909 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 04:51:45,909 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 488 proven. 80 refuted. 0 times theorem prover too weak. 2619 trivial. 0 not checked. [2024-11-28 04:51:46,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:46,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921598851] [2024-11-28 04:51:46,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921598851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:46,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093863548] [2024-11-28 04:51:46,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:51:46,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:46,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:46,167 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:46,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:51:46,325 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 04:51:46,325 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:46,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:51:46,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 496 proven. 83 refuted. 0 times theorem prover too weak. 2608 trivial. 0 not checked. [2024-11-28 04:51:46,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 500 proven. 89 refuted. 0 times theorem prover too weak. 2598 trivial. 0 not checked. [2024-11-28 04:51:48,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093863548] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:48,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:51:48,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2024-11-28 04:51:48,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138036747] [2024-11-28 04:51:48,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:48,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:51:48,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:48,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:51:48,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:51:48,036 INFO L87 Difference]: Start difference. First operand 184 states and 301 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-28 04:51:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:48,284 INFO L93 Difference]: Finished difference Result 255 states and 465 transitions. [2024-11-28 04:51:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:51:48,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) Word has length 336 [2024-11-28 04:51:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:48,290 INFO L225 Difference]: With dead ends: 255 [2024-11-28 04:51:48,290 INFO L226 Difference]: Without dead ends: 251 [2024-11-28 04:51:48,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 662 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:51:48,292 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:48,292 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 164 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:51:48,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-28 04:51:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 224. [2024-11-28 04:51:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 149 states have internal predecessors, (173), 45 states have call successors, (45), 20 states have call predecessors, (45), 30 states have return successors, (187), 54 states have call predecessors, (187), 45 states have call successors, (187) [2024-11-28 04:51:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 405 transitions. [2024-11-28 04:51:48,327 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 405 transitions. Word has length 336 [2024-11-28 04:51:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:48,327 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 405 transitions. [2024-11-28 04:51:48,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2024-11-28 04:51:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 405 transitions. [2024-11-28 04:51:48,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2024-11-28 04:51:48,338 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:48,338 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 30, 29, 29, 24, 21, 21, 21, 21, 21, 21, 21, 16, 14, 14, 14, 14, 14, 14, 14, 12, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:48,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 04:51:48,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 04:51:48,543 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:48,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:48,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1192940537, now seen corresponding path program 4 times [2024-11-28 04:51:48,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:48,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320712728] [2024-11-28 04:51:48,544 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:51:48,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:48,621 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:51:48,621 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 163 proven. 1016 refuted. 0 times theorem prover too weak. 5804 trivial. 0 not checked. [2024-11-28 04:51:49,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:49,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320712728] [2024-11-28 04:51:49,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320712728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:49,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123814006] [2024-11-28 04:51:49,218 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:51:49,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:49,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:49,220 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:49,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:51:49,508 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:51:49,509 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:49,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:51:49,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 145 proven. 1250 refuted. 0 times theorem prover too weak. 5588 trivial. 0 not checked. [2024-11-28 04:51:49,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6983 backedges. 145 proven. 1283 refuted. 0 times theorem prover too weak. 5555 trivial. 0 not checked. [2024-11-28 04:51:54,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123814006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:54,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:51:54,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 19] total 29 [2024-11-28 04:51:54,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659596381] [2024-11-28 04:51:54,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:54,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:51:54,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:54,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:51:54,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:51:54,726 INFO L87 Difference]: Start difference. First operand 224 states and 405 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (28), 1 states have call predecessors, (28), 16 states have return successors, (40), 16 states have call predecessors, (40), 24 states have call successors, (40) [2024-11-28 04:51:55,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:55,403 INFO L93 Difference]: Finished difference Result 298 states and 647 transitions. [2024-11-28 04:51:55,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:51:55,404 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (28), 1 states have call predecessors, (28), 16 states have return successors, (40), 16 states have call predecessors, (40), 24 states have call successors, (40) Word has length 484 [2024-11-28 04:51:55,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:55,411 INFO L225 Difference]: With dead ends: 298 [2024-11-28 04:51:55,412 INFO L226 Difference]: Without dead ends: 294 [2024-11-28 04:51:55,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 948 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 04:51:55,414 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:55,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 223 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:51:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-28 04:51:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 266. [2024-11-28 04:51:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 173 states have (on average 1.1445086705202312) internal successors, (198), 174 states have internal predecessors, (198), 54 states have call successors, (54), 20 states have call predecessors, (54), 38 states have return successors, (299), 71 states have call predecessors, (299), 54 states have call successors, (299) [2024-11-28 04:51:55,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 551 transitions. [2024-11-28 04:51:55,475 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 551 transitions. Word has length 484 [2024-11-28 04:51:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:55,479 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 551 transitions. [2024-11-28 04:51:55,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (28), 1 states have call predecessors, (28), 16 states have return successors, (40), 16 states have call predecessors, (40), 24 states have call successors, (40) [2024-11-28 04:51:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 551 transitions. [2024-11-28 04:51:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1030 [2024-11-28 04:51:55,533 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:55,534 INFO L218 NwaCegarLoop]: trace histogram [80, 80, 71, 71, 63, 56, 40, 40, 40, 40, 40, 40, 40, 35, 35, 35, 35, 35, 35, 35, 28, 17, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:55,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:51:55,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 04:51:55,738 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:55,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:55,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2011660339, now seen corresponding path program 5 times [2024-11-28 04:51:55,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:55,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007336923] [2024-11-28 04:51:55,739 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:51:55,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:55,869 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-11-28 04:51:55,869 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 31573 backedges. 1147 proven. 1349 refuted. 0 times theorem prover too weak. 29077 trivial. 0 not checked. [2024-11-28 04:51:56,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:56,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007336923] [2024-11-28 04:51:56,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007336923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:56,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107878575] [2024-11-28 04:51:56,219 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:51:56,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:56,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:56,222 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:56,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:51:56,608 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-11-28 04:51:56,609 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:56,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:51:56,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 31573 backedges. 14307 proven. 6 refuted. 0 times theorem prover too weak. 17260 trivial. 0 not checked. [2024-11-28 04:51:56,719 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 31573 backedges. 1231 proven. 1556 refuted. 0 times theorem prover too weak. 28786 trivial. 0 not checked. [2024-11-28 04:52:00,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107878575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:00,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:52:00,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-28 04:52:00,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675995063] [2024-11-28 04:52:00,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:00,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:52:00,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:00,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:52:00,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:52:00,121 INFO L87 Difference]: Start difference. First operand 266 states and 551 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2024-11-28 04:52:00,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:00,305 INFO L93 Difference]: Finished difference Result 493 states and 1096 transitions. [2024-11-28 04:52:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:52:00,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) Word has length 1029 [2024-11-28 04:52:00,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:00,311 INFO L225 Difference]: With dead ends: 493 [2024-11-28 04:52:00,312 INFO L226 Difference]: Without dead ends: 232 [2024-11-28 04:52:00,315 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2070 GetRequests, 2048 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:52:00,316 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:00,316 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 152 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:52:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-28 04:52:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 225. [2024-11-28 04:52:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 148 states have (on average 1.135135135135135) internal successors, (168), 147 states have internal predecessors, (168), 46 states have call successors, (46), 19 states have call predecessors, (46), 30 states have return successors, (192), 58 states have call predecessors, (192), 46 states have call successors, (192) [2024-11-28 04:52:00,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 406 transitions. [2024-11-28 04:52:00,352 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 406 transitions. Word has length 1029 [2024-11-28 04:52:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:00,353 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 406 transitions. [2024-11-28 04:52:00,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2024-11-28 04:52:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 406 transitions. [2024-11-28 04:52:00,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1048 [2024-11-28 04:52:00,366 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:00,367 INFO L218 NwaCegarLoop]: trace histogram [80, 80, 73, 73, 63, 62, 40, 40, 40, 40, 40, 40, 40, 36, 36, 36, 36, 36, 36, 36, 27, 22, 17, 11, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:00,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:52:00,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 04:52:00,567 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:00,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:00,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2016382966, now seen corresponding path program 6 times [2024-11-28 04:52:00,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:00,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319439198] [2024-11-28 04:52:00,568 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:52:00,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:00,739 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-28 04:52:00,739 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 32636 backedges. 1044 proven. 3733 refuted. 0 times theorem prover too weak. 27859 trivial. 0 not checked. [2024-11-28 04:52:01,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:01,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319439198] [2024-11-28 04:52:01,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319439198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:01,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785040513] [2024-11-28 04:52:01,862 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:52:01,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:01,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:01,867 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:01,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:52:02,272 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-28 04:52:02,272 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:02,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:52:02,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 32636 backedges. 15146 proven. 604 refuted. 0 times theorem prover too weak. 16886 trivial. 0 not checked. [2024-11-28 04:52:02,487 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 32636 backedges. 1081 proven. 3964 refuted. 0 times theorem prover too weak. 27591 trivial. 0 not checked. [2024-11-28 04:52:08,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785040513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:08,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:52:08,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 25] total 33 [2024-11-28 04:52:08,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271795372] [2024-11-28 04:52:08,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:08,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 04:52:08,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:08,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 04:52:08,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:52:08,823 INFO L87 Difference]: Start difference. First operand 225 states and 406 transitions. Second operand has 33 states, 33 states have (on average 3.727272727272727) internal successors, (123), 33 states have internal predecessors, (123), 26 states have call successors, (38), 2 states have call predecessors, (38), 13 states have return successors, (46), 15 states have call predecessors, (46), 26 states have call successors, (46) [2024-11-28 04:52:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:09,885 INFO L93 Difference]: Finished difference Result 559 states and 1172 transitions. [2024-11-28 04:52:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 04:52:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.727272727272727) internal successors, (123), 33 states have internal predecessors, (123), 26 states have call successors, (38), 2 states have call predecessors, (38), 13 states have return successors, (46), 15 states have call predecessors, (46), 26 states have call successors, (46) Word has length 1047 [2024-11-28 04:52:09,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:09,891 INFO L225 Difference]: With dead ends: 559 [2024-11-28 04:52:09,891 INFO L226 Difference]: Without dead ends: 259 [2024-11-28 04:52:09,895 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2142 GetRequests, 2074 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=503, Invalid=2803, Unknown=0, NotChecked=0, Total=3306 [2024-11-28 04:52:09,896 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 102 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:09,896 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 426 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:52:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-28 04:52:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 184. [2024-11-28 04:52:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 124 states have (on average 1.0806451612903225) internal successors, (134), 121 states have internal predecessors, (134), 34 states have call successors, (34), 18 states have call predecessors, (34), 25 states have return successors, (146), 44 states have call predecessors, (146), 34 states have call successors, (146) [2024-11-28 04:52:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2024-11-28 04:52:09,928 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 1047 [2024-11-28 04:52:09,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:09,929 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2024-11-28 04:52:09,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.727272727272727) internal successors, (123), 33 states have internal predecessors, (123), 26 states have call successors, (38), 2 states have call predecessors, (38), 13 states have return successors, (46), 15 states have call predecessors, (46), 26 states have call successors, (46) [2024-11-28 04:52:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2024-11-28 04:52:09,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 939 [2024-11-28 04:52:09,940 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:09,941 INFO L218 NwaCegarLoop]: trace histogram [72, 72, 65, 65, 56, 56, 36, 36, 36, 36, 36, 36, 36, 32, 32, 32, 32, 32, 32, 32, 24, 20, 16, 9, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:09,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:10,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:52:10,142 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:10,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:10,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1523533126, now seen corresponding path program 7 times [2024-11-28 04:52:10,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:10,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761090801] [2024-11-28 04:52:10,142 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:52:10,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 26128 backedges. 383 proven. 2824 refuted. 0 times theorem prover too weak. 22921 trivial. 0 not checked. [2024-11-28 04:52:12,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761090801] [2024-11-28 04:52:12,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761090801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:12,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501401075] [2024-11-28 04:52:12,109 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:52:12,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:12,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:12,112 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:12,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:52:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:12,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 2102 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 04:52:12,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 26128 backedges. 383 proven. 2824 refuted. 0 times theorem prover too weak. 22921 trivial. 0 not checked. [2024-11-28 04:52:12,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 26128 backedges. 383 proven. 2868 refuted. 0 times theorem prover too weak. 22877 trivial. 0 not checked. [2024-11-28 04:52:19,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501401075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:19,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:52:19,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 21] total 23 [2024-11-28 04:52:19,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722461057] [2024-11-28 04:52:19,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:19,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:52:19,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:19,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:52:19,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:52:19,211 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 23 states have internal predecessors, (80), 20 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (29), 10 states have call predecessors, (29), 20 states have call successors, (29) [2024-11-28 04:52:19,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:19,526 INFO L93 Difference]: Finished difference Result 216 states and 415 transitions. [2024-11-28 04:52:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:52:19,528 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 23 states have internal predecessors, (80), 20 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (29), 10 states have call predecessors, (29), 20 states have call successors, (29) Word has length 938 [2024-11-28 04:52:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:19,533 INFO L225 Difference]: With dead ends: 216 [2024-11-28 04:52:19,533 INFO L226 Difference]: Without dead ends: 212 [2024-11-28 04:52:19,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1903 GetRequests, 1864 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2024-11-28 04:52:19,534 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:19,535 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 228 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:52:19,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-28 04:52:19,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 179. [2024-11-28 04:52:19,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 121 states have (on average 1.0826446280991735) internal successors, (131), 118 states have internal predecessors, (131), 33 states have call successors, (33), 18 states have call predecessors, (33), 24 states have return successors, (138), 42 states have call predecessors, (138), 33 states have call successors, (138) [2024-11-28 04:52:19,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 302 transitions. [2024-11-28 04:52:19,562 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 302 transitions. Word has length 938 [2024-11-28 04:52:19,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:19,563 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 302 transitions. [2024-11-28 04:52:19,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 23 states have internal predecessors, (80), 20 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (29), 10 states have call predecessors, (29), 20 states have call successors, (29) [2024-11-28 04:52:19,564 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 302 transitions. [2024-11-28 04:52:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1638 [2024-11-28 04:52:19,584 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:19,585 INFO L218 NwaCegarLoop]: trace histogram [134, 134, 105, 105, 102, 97, 67, 67, 67, 67, 67, 67, 67, 52, 52, 52, 52, 52, 52, 52, 50, 32, 30, 8, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:19,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:52:19,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 04:52:19,789 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:19,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:19,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1397567639, now seen corresponding path program 8 times [2024-11-28 04:52:19,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:19,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507727772] [2024-11-28 04:52:19,790 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:52:19,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:20,211 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:52:20,211 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 81439 backedges. 896 proven. 3640 refuted. 0 times theorem prover too weak. 76903 trivial. 0 not checked. [2024-11-28 04:52:22,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:22,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507727772] [2024-11-28 04:52:22,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507727772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:22,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911293981] [2024-11-28 04:52:22,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:52:22,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:22,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:22,440 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:22,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:52:23,209 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:52:23,209 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:23,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 3653 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:52:23,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 81439 backedges. 908 proven. 5572 refuted. 0 times theorem prover too weak. 74959 trivial. 0 not checked. [2024-11-28 04:52:23,541 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 81439 backedges. 912 proven. 5620 refuted. 0 times theorem prover too weak. 74907 trivial. 0 not checked. [2024-11-28 04:52:32,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911293981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:32,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:52:32,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 23] total 31 [2024-11-28 04:52:32,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105603872] [2024-11-28 04:52:32,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:32,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 04:52:32,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:32,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 04:52:32,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2024-11-28 04:52:32,857 INFO L87 Difference]: Start difference. First operand 179 states and 302 transitions. Second operand has 31 states, 30 states have (on average 3.433333333333333) internal successors, (103), 31 states have internal predecessors, (103), 24 states have call successors, (32), 1 states have call predecessors, (32), 13 states have return successors, (43), 15 states have call predecessors, (43), 24 states have call successors, (43) [2024-11-28 04:52:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:33,572 INFO L93 Difference]: Finished difference Result 453 states and 1128 transitions. [2024-11-28 04:52:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 04:52:33,572 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.433333333333333) internal successors, (103), 31 states have internal predecessors, (103), 24 states have call successors, (32), 1 states have call predecessors, (32), 13 states have return successors, (43), 15 states have call predecessors, (43), 24 states have call successors, (43) Word has length 1637 [2024-11-28 04:52:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:33,576 INFO L225 Difference]: With dead ends: 453 [2024-11-28 04:52:33,576 INFO L226 Difference]: Without dead ends: 204 [2024-11-28 04:52:33,580 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3295 GetRequests, 3243 SyntacticMatches, 11 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1494, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 04:52:33,581 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 37 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:33,581 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 662 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:52:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-28 04:52:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2024-11-28 04:52:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 135 states have internal predecessors, (146), 35 states have call successors, (35), 20 states have call predecessors, (35), 29 states have return successors, (142), 46 states have call predecessors, (142), 35 states have call successors, (142) [2024-11-28 04:52:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 323 transitions. [2024-11-28 04:52:33,612 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 323 transitions. Word has length 1637 [2024-11-28 04:52:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:33,613 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 323 transitions. [2024-11-28 04:52:33,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.433333333333333) internal successors, (103), 31 states have internal predecessors, (103), 24 states have call successors, (32), 1 states have call predecessors, (32), 13 states have return successors, (43), 15 states have call predecessors, (43), 24 states have call successors, (43) [2024-11-28 04:52:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 323 transitions. [2024-11-28 04:52:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1115 [2024-11-28 04:52:33,625 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:33,625 INFO L218 NwaCegarLoop]: trace histogram [87, 87, 76, 76, 69, 63, 43, 43, 43, 43, 43, 43, 43, 38, 38, 38, 38, 38, 38, 38, 31, 20, 18, 13, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:33,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:52:33,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:52:33,830 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:33,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1875612953, now seen corresponding path program 9 times [2024-11-28 04:52:33,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:33,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810990203] [2024-11-28 04:52:33,831 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:52:33,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:33,879 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 04:52:33,879 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 37087 backedges. 2727 proven. 67 refuted. 0 times theorem prover too weak. 34293 trivial. 0 not checked. [2024-11-28 04:52:34,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:34,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810990203] [2024-11-28 04:52:34,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810990203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:34,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844335525] [2024-11-28 04:52:34,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:52:34,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:34,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:34,149 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:34,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:52:34,589 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 04:52:34,590 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:34,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:52:34,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 37087 backedges. 3025 proven. 78 refuted. 0 times theorem prover too weak. 33984 trivial. 0 not checked. [2024-11-28 04:52:34,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 37087 backedges. 3025 proven. 83 refuted. 0 times theorem prover too weak. 33979 trivial. 0 not checked. [2024-11-28 04:52:38,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844335525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:38,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:52:38,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 23 [2024-11-28 04:52:38,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384457457] [2024-11-28 04:52:38,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:38,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:52:38,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:38,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:52:38,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:52:38,588 INFO L87 Difference]: Start difference. First operand 202 states and 323 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 12 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2024-11-28 04:52:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:39,005 INFO L93 Difference]: Finished difference Result 410 states and 773 transitions. [2024-11-28 04:52:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:52:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 12 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) Word has length 1114 [2024-11-28 04:52:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:39,010 INFO L225 Difference]: With dead ends: 410 [2024-11-28 04:52:39,010 INFO L226 Difference]: Without dead ends: 215 [2024-11-28 04:52:39,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2252 GetRequests, 2213 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:52:39,014 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:39,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 342 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:52:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-28 04:52:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 205. [2024-11-28 04:52:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 140 states have (on average 1.0571428571428572) internal successors, (148), 137 states have internal predecessors, (148), 35 states have call successors, (35), 21 states have call predecessors, (35), 29 states have return successors, (163), 46 states have call predecessors, (163), 35 states have call successors, (163) [2024-11-28 04:52:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 346 transitions. [2024-11-28 04:52:39,044 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 346 transitions. Word has length 1114 [2024-11-28 04:52:39,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:39,045 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 346 transitions. [2024-11-28 04:52:39,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 12 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2024-11-28 04:52:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 346 transitions. [2024-11-28 04:52:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1196 [2024-11-28 04:52:39,093 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:39,094 INFO L218 NwaCegarLoop]: trace histogram [88, 88, 87, 87, 71, 70, 44, 44, 44, 44, 44, 44, 44, 43, 43, 43, 43, 43, 43, 43, 28, 26, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:39,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 04:52:39,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 04:52:39,298 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:39,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:39,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1184935641, now seen corresponding path program 10 times [2024-11-28 04:52:39,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:39,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468960625] [2024-11-28 04:52:39,300 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:52:39,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:39,475 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:52:39,475 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 42572 backedges. 1223 proven. 3555 refuted. 0 times theorem prover too weak. 37794 trivial. 0 not checked. [2024-11-28 04:52:41,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468960625] [2024-11-28 04:52:41,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468960625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827640862] [2024-11-28 04:52:41,151 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:52:41,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:41,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:41,153 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:41,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:52:41,762 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:52:41,763 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:41,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:52:41,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 42572 backedges. 1223 proven. 3555 refuted. 0 times theorem prover too weak. 37794 trivial. 0 not checked. [2024-11-28 04:52:41,938 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 42572 backedges. 1225 proven. 3605 refuted. 0 times theorem prover too weak. 37742 trivial. 0 not checked. [2024-11-28 04:52:50,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827640862] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:50,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:52:50,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 25 [2024-11-28 04:52:50,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019308167] [2024-11-28 04:52:50,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:50,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:52:50,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:50,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:52:50,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:52:50,248 INFO L87 Difference]: Start difference. First operand 205 states and 346 transitions. Second operand has 25 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 25 states have internal predecessors, (89), 22 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (35), 14 states have call predecessors, (35), 22 states have call successors, (35) [2024-11-28 04:52:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:50,640 INFO L93 Difference]: Finished difference Result 244 states and 439 transitions. [2024-11-28 04:52:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 04:52:50,640 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 25 states have internal predecessors, (89), 22 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (35), 14 states have call predecessors, (35), 22 states have call successors, (35) Word has length 1195 [2024-11-28 04:52:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:50,645 INFO L225 Difference]: With dead ends: 244 [2024-11-28 04:52:50,645 INFO L226 Difference]: Without dead ends: 211 [2024-11-28 04:52:50,647 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2421 GetRequests, 2377 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 04:52:50,647 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 20 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:50,648 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 540 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:52:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-28 04:52:50,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2024-11-28 04:52:50,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 140 states have (on average 1.0571428571428572) internal successors, (148), 137 states have internal predecessors, (148), 35 states have call successors, (35), 21 states have call predecessors, (35), 29 states have return successors, (154), 46 states have call predecessors, (154), 35 states have call successors, (154) [2024-11-28 04:52:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 337 transitions. [2024-11-28 04:52:50,677 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 337 transitions. Word has length 1195 [2024-11-28 04:52:50,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:50,677 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 337 transitions. [2024-11-28 04:52:50,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.7083333333333335) internal successors, (89), 25 states have internal predecessors, (89), 22 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (35), 14 states have call predecessors, (35), 22 states have call successors, (35) [2024-11-28 04:52:50,678 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 337 transitions. [2024-11-28 04:52:50,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2024-11-28 04:52:50,686 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:50,687 INFO L218 NwaCegarLoop]: trace histogram [70, 70, 63, 63, 54, 51, 35, 35, 35, 35, 35, 35, 35, 31, 31, 31, 31, 31, 31, 31, 23, 16, 16, 12, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:50,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 04:52:50,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:52:50,887 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:50,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:50,888 INFO L85 PathProgramCache]: Analyzing trace with hash 650114780, now seen corresponding path program 11 times [2024-11-28 04:52:50,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:50,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38043695] [2024-11-28 04:52:50,888 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:52:50,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:50,939 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 04:52:50,940 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24418 backedges. 982 proven. 2075 refuted. 0 times theorem prover too weak. 21361 trivial. 0 not checked. [2024-11-28 04:52:51,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:51,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38043695] [2024-11-28 04:52:51,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38043695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:51,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570268928] [2024-11-28 04:52:51,247 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:52:51,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:51,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:51,249 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:51,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:52:51,699 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-28 04:52:51,699 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:51,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:52:51,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24418 backedges. 11161 proven. 119 refuted. 0 times theorem prover too weak. 13138 trivial. 0 not checked. [2024-11-28 04:52:51,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 24418 backedges. 976 proven. 2086 refuted. 0 times theorem prover too weak. 21356 trivial. 0 not checked. [2024-11-28 04:52:55,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570268928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:55,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:52:55,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 16] total 25 [2024-11-28 04:52:55,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113177751] [2024-11-28 04:52:55,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:55,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:52:55,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:55,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:52:55,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:52:55,753 INFO L87 Difference]: Start difference. First operand 205 states and 337 transitions. Second operand has 25 states, 24 states have (on average 3.875) internal successors, (93), 25 states have internal predecessors, (93), 16 states have call successors, (29), 2 states have call predecessors, (29), 8 states have return successors, (34), 11 states have call predecessors, (34), 16 states have call successors, (34) [2024-11-28 04:52:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:56,121 INFO L93 Difference]: Finished difference Result 414 states and 772 transitions. [2024-11-28 04:52:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:52:56,122 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.875) internal successors, (93), 25 states have internal predecessors, (93), 16 states have call successors, (29), 2 states have call predecessors, (29), 8 states have return successors, (34), 11 states have call predecessors, (34), 16 states have call successors, (34) Word has length 907 [2024-11-28 04:52:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:56,126 INFO L225 Difference]: With dead ends: 414 [2024-11-28 04:52:56,126 INFO L226 Difference]: Without dead ends: 216 [2024-11-28 04:52:56,128 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1842 GetRequests, 1799 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 04:52:56,129 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:56,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 218 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:52:56,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-28 04:52:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 205. [2024-11-28 04:52:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 140 states have (on average 1.0571428571428572) internal successors, (148), 137 states have internal predecessors, (148), 35 states have call successors, (35), 21 states have call predecessors, (35), 29 states have return successors, (152), 46 states have call predecessors, (152), 35 states have call successors, (152) [2024-11-28 04:52:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 335 transitions. [2024-11-28 04:52:56,158 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 335 transitions. Word has length 907 [2024-11-28 04:52:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:56,158 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 335 transitions. [2024-11-28 04:52:56,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.875) internal successors, (93), 25 states have internal predecessors, (93), 16 states have call successors, (29), 2 states have call predecessors, (29), 8 states have return successors, (34), 11 states have call predecessors, (34), 16 states have call successors, (34) [2024-11-28 04:52:56,159 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 335 transitions. [2024-11-28 04:52:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2024-11-28 04:52:56,169 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:56,169 INFO L218 NwaCegarLoop]: trace histogram [78, 78, 67, 67, 59, 56, 39, 39, 39, 39, 39, 39, 39, 33, 33, 33, 33, 33, 33, 33, 26, 19, 17, 11, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:56,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:52:56,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:56,374 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:56,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash -345933056, now seen corresponding path program 12 times [2024-11-28 04:52:56,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:56,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099559719] [2024-11-28 04:52:56,376 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:52:56,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:56,464 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 04:52:56,464 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 29183 backedges. 682 proven. 1741 refuted. 0 times theorem prover too weak. 26760 trivial. 0 not checked. [2024-11-28 04:52:56,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:56,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099559719] [2024-11-28 04:52:56,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099559719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:56,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730861738] [2024-11-28 04:52:56,795 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:52:56,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:56,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:56,798 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:56,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:52:57,345 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-28 04:52:57,345 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:57,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:52:57,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 29183 backedges. 7855 proven. 21 refuted. 0 times theorem prover too weak. 21307 trivial. 0 not checked. [2024-11-28 04:52:57,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 29183 backedges. 717 proven. 1985 refuted. 0 times theorem prover too weak. 26481 trivial. 0 not checked. [2024-11-28 04:53:00,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730861738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:00,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:53:00,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2024-11-28 04:53:00,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733844731] [2024-11-28 04:53:00,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:00,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:53:00,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:00,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:53:00,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:53:00,650 INFO L87 Difference]: Start difference. First operand 205 states and 335 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 10 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (25), 6 states have call predecessors, (25), 10 states have call successors, (25) [2024-11-28 04:53:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:00,984 INFO L93 Difference]: Finished difference Result 411 states and 789 transitions. [2024-11-28 04:53:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:53:00,985 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 10 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (25), 6 states have call predecessors, (25), 10 states have call successors, (25) Word has length 989 [2024-11-28 04:53:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:00,988 INFO L225 Difference]: With dead ends: 411 [2024-11-28 04:53:00,989 INFO L226 Difference]: Without dead ends: 209 [2024-11-28 04:53:00,991 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1998 GetRequests, 1964 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2024-11-28 04:53:00,992 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:00,992 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 207 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:53:00,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-28 04:53:01,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2024-11-28 04:53:01,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 138 states have (on average 1.0507246376811594) internal successors, (145), 135 states have internal predecessors, (145), 35 states have call successors, (35), 21 states have call predecessors, (35), 28 states have return successors, (139), 45 states have call predecessors, (139), 35 states have call successors, (139) [2024-11-28 04:53:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 319 transitions. [2024-11-28 04:53:01,028 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 319 transitions. Word has length 989 [2024-11-28 04:53:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:01,028 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 319 transitions. [2024-11-28 04:53:01,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 10 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (25), 6 states have call predecessors, (25), 10 states have call successors, (25) [2024-11-28 04:53:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 319 transitions. [2024-11-28 04:53:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1154 [2024-11-28 04:53:01,041 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:01,042 INFO L218 NwaCegarLoop]: trace histogram [86, 86, 83, 83, 68, 67, 43, 43, 43, 43, 43, 43, 43, 41, 41, 41, 41, 41, 41, 41, 27, 24, 18, 16, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:01,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 04:53:01,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:01,243 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:01,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:01,244 INFO L85 PathProgramCache]: Analyzing trace with hash 380827318, now seen corresponding path program 13 times [2024-11-28 04:53:01,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:01,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175250623] [2024-11-28 04:53:01,244 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:53:01,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 39613 backedges. 595 proven. 2976 refuted. 0 times theorem prover too weak. 36042 trivial. 0 not checked. [2024-11-28 04:53:03,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:03,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175250623] [2024-11-28 04:53:03,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175250623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:03,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875795539] [2024-11-28 04:53:03,096 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:53:03,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:03,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:03,098 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:03,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 04:53:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:03,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:53:03,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 39613 backedges. 595 proven. 2976 refuted. 0 times theorem prover too weak. 36042 trivial. 0 not checked. [2024-11-28 04:53:03,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 39613 backedges. 595 proven. 3009 refuted. 0 times theorem prover too weak. 36009 trivial. 0 not checked. [2024-11-28 04:53:09,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875795539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:09,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:53:09,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 21 [2024-11-28 04:53:09,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768384894] [2024-11-28 04:53:09,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:09,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:53:09,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:09,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:53:09,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:53:09,244 INFO L87 Difference]: Start difference. First operand 202 states and 319 transitions. Second operand has 21 states, 20 states have (on average 3.75) internal successors, (75), 21 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) [2024-11-28 04:53:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:09,507 INFO L93 Difference]: Finished difference Result 244 states and 433 transitions. [2024-11-28 04:53:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:53:09,507 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.75) internal successors, (75), 21 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) Word has length 1153 [2024-11-28 04:53:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:09,513 INFO L225 Difference]: With dead ends: 244 [2024-11-28 04:53:09,513 INFO L226 Difference]: Without dead ends: 235 [2024-11-28 04:53:09,514 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2330 GetRequests, 2295 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:53:09,515 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:09,515 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 186 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:53:09,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-28 04:53:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 209. [2024-11-28 04:53:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 142 states have (on average 1.0492957746478873) internal successors, (149), 139 states have internal predecessors, (149), 37 states have call successors, (37), 21 states have call predecessors, (37), 29 states have return successors, (157), 48 states have call predecessors, (157), 37 states have call successors, (157) [2024-11-28 04:53:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 343 transitions. [2024-11-28 04:53:09,546 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 343 transitions. Word has length 1153 [2024-11-28 04:53:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:09,547 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 343 transitions. [2024-11-28 04:53:09,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.75) internal successors, (75), 21 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) [2024-11-28 04:53:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 343 transitions. [2024-11-28 04:53:09,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1469 [2024-11-28 04:53:09,565 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:09,565 INFO L218 NwaCegarLoop]: trace histogram [115, 115, 100, 100, 90, 84, 57, 57, 57, 57, 57, 57, 57, 50, 50, 50, 50, 50, 50, 50, 40, 27, 25, 16, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:09,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 04:53:09,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:09,766 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:09,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:09,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1226872575, now seen corresponding path program 14 times [2024-11-28 04:53:09,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:09,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117295705] [2024-11-28 04:53:09,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:53:09,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:09,983 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:53:09,983 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 64795 backedges. 1225 proven. 3358 refuted. 0 times theorem prover too weak. 60212 trivial. 0 not checked. [2024-11-28 04:53:12,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:12,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117295705] [2024-11-28 04:53:12,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117295705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:12,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213436511] [2024-11-28 04:53:12,182 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:53:12,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:12,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:12,184 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:12,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:53:12,977 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:53:12,977 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:12,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 3279 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:53:12,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 64795 backedges. 950 proven. 4785 refuted. 0 times theorem prover too weak. 59060 trivial. 0 not checked. [2024-11-28 04:53:13,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 64795 backedges. 954 proven. 4833 refuted. 0 times theorem prover too weak. 59008 trivial. 0 not checked. [2024-11-28 04:53:22,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213436511] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:22,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:53:22,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 23] total 36 [2024-11-28 04:53:22,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124365359] [2024-11-28 04:53:22,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:22,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 04:53:22,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:22,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 04:53:22,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 04:53:22,486 INFO L87 Difference]: Start difference. First operand 209 states and 343 transitions. Second operand has 36 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 36 states have internal predecessors, (117), 30 states have call successors, (36), 1 states have call predecessors, (36), 19 states have return successors, (48), 21 states have call predecessors, (48), 30 states have call successors, (48) [2024-11-28 04:53:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:24,721 INFO L93 Difference]: Finished difference Result 611 states and 1465 transitions. [2024-11-28 04:53:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-28 04:53:24,722 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 36 states have internal predecessors, (117), 30 states have call successors, (36), 1 states have call predecessors, (36), 19 states have return successors, (48), 21 states have call predecessors, (48), 30 states have call successors, (48) Word has length 1468 [2024-11-28 04:53:24,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:24,730 INFO L225 Difference]: With dead ends: 611 [2024-11-28 04:53:24,730 INFO L226 Difference]: Without dead ends: 346 [2024-11-28 04:53:24,738 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3000 GetRequests, 2908 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=883, Invalid=5923, Unknown=0, NotChecked=0, Total=6806 [2024-11-28 04:53:24,740 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 195 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:24,741 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 807 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 04:53:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-11-28 04:53:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 247. [2024-11-28 04:53:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 173 states have (on average 1.0520231213872833) internal successors, (182), 169 states have internal predecessors, (182), 50 states have call successors, (50), 36 states have call predecessors, (50), 23 states have return successors, (136), 41 states have call predecessors, (136), 50 states have call successors, (136) [2024-11-28 04:53:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 368 transitions. [2024-11-28 04:53:24,786 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 368 transitions. Word has length 1468 [2024-11-28 04:53:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:24,787 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 368 transitions. [2024-11-28 04:53:24,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 36 states have internal predecessors, (117), 30 states have call successors, (36), 1 states have call predecessors, (36), 19 states have return successors, (48), 21 states have call predecessors, (48), 30 states have call successors, (48) [2024-11-28 04:53:24,787 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 368 transitions. [2024-11-28 04:53:24,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1224 [2024-11-28 04:53:24,804 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:24,805 INFO L218 NwaCegarLoop]: trace histogram [90, 90, 89, 89, 74, 71, 45, 45, 45, 45, 45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 30, 26, 18, 16, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:24,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 04:53:25,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:25,006 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:25,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash -733279727, now seen corresponding path program 15 times [2024-11-28 04:53:25,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:25,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91352860] [2024-11-28 04:53:25,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:53:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:25,074 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-28 04:53:25,074 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 44614 backedges. 3442 proven. 124 refuted. 0 times theorem prover too weak. 41048 trivial. 0 not checked. [2024-11-28 04:53:25,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:25,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91352860] [2024-11-28 04:53:25,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91352860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:25,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102238297] [2024-11-28 04:53:25,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:53:25,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:25,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:25,668 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:25,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 04:53:26,361 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-28 04:53:26,361 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:26,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:53:26,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 44614 backedges. 3738 proven. 146 refuted. 0 times theorem prover too weak. 40730 trivial. 0 not checked. [2024-11-28 04:53:26,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 44614 backedges. 3738 proven. 152 refuted. 0 times theorem prover too weak. 40724 trivial. 0 not checked. [2024-11-28 04:53:31,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102238297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:31,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:53:31,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 17] total 28 [2024-11-28 04:53:31,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652484754] [2024-11-28 04:53:31,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:31,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:53:31,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:31,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:53:31,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:53:31,644 INFO L87 Difference]: Start difference. First operand 247 states and 368 transitions. Second operand has 28 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 28 states have internal predecessors, (89), 16 states have call successors, (27), 1 states have call predecessors, (27), 9 states have return successors, (31), 16 states have call predecessors, (31), 16 states have call successors, (31) [2024-11-28 04:53:32,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:32,371 INFO L93 Difference]: Finished difference Result 484 states and 718 transitions. [2024-11-28 04:53:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:53:32,372 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 28 states have internal predecessors, (89), 16 states have call successors, (27), 1 states have call predecessors, (27), 9 states have return successors, (31), 16 states have call predecessors, (31), 16 states have call successors, (31) Word has length 1223 [2024-11-28 04:53:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:32,380 INFO L225 Difference]: With dead ends: 484 [2024-11-28 04:53:32,380 INFO L226 Difference]: Without dead ends: 243 [2024-11-28 04:53:32,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2475 GetRequests, 2430 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:53:32,384 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 50 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:32,384 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 369 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:53:32,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-11-28 04:53:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 209. [2024-11-28 04:53:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 145 states have (on average 1.0482758620689656) internal successors, (152), 143 states have internal predecessors, (152), 41 states have call successors, (41), 28 states have call predecessors, (41), 22 states have return successors, (101), 37 states have call predecessors, (101), 41 states have call successors, (101) [2024-11-28 04:53:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 294 transitions. [2024-11-28 04:53:32,433 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 294 transitions. Word has length 1223 [2024-11-28 04:53:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:32,435 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 294 transitions. [2024-11-28 04:53:32,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 28 states have internal predecessors, (89), 16 states have call successors, (27), 1 states have call predecessors, (27), 9 states have return successors, (31), 16 states have call predecessors, (31), 16 states have call successors, (31) [2024-11-28 04:53:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 294 transitions. [2024-11-28 04:53:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1769 [2024-11-28 04:53:32,494 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:32,495 INFO L218 NwaCegarLoop]: trace histogram [133, 133, 126, 126, 107, 103, 66, 66, 66, 66, 66, 66, 66, 63, 63, 63, 63, 63, 63, 63, 41, 40, 30, 19, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:32,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 04:53:32,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 04:53:32,696 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:32,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:32,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1460159983, now seen corresponding path program 16 times [2024-11-28 04:53:32,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:32,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338304159] [2024-11-28 04:53:32,697 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:53:32,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:32,946 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:53:32,946 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 93928 backedges. 1304 proven. 2839 refuted. 0 times theorem prover too weak. 89785 trivial. 0 not checked. [2024-11-28 04:53:34,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:34,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338304159] [2024-11-28 04:53:34,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338304159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:34,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925849451] [2024-11-28 04:53:34,902 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:53:34,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:34,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:34,909 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:34,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 04:53:35,936 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:53:35,936 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:35,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 3146 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:53:35,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 93928 backedges. 1811 proven. 5412 refuted. 0 times theorem prover too weak. 86705 trivial. 0 not checked. [2024-11-28 04:53:36,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 93928 backedges. 1813 proven. 5462 refuted. 0 times theorem prover too weak. 86653 trivial. 0 not checked. [2024-11-28 04:53:47,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925849451] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:47,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:53:47,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 23] total 34 [2024-11-28 04:53:47,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469188424] [2024-11-28 04:53:47,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:47,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 04:53:47,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:53:47,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 04:53:47,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:53:47,730 INFO L87 Difference]: Start difference. First operand 209 states and 294 transitions. Second operand has 34 states, 32 states have (on average 3.5) internal successors, (112), 34 states have internal predecessors, (112), 27 states have call successors, (35), 1 states have call predecessors, (35), 17 states have return successors, (45), 21 states have call predecessors, (45), 27 states have call successors, (45) [2024-11-28 04:53:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:49,597 INFO L93 Difference]: Finished difference Result 552 states and 946 transitions. [2024-11-28 04:53:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-28 04:53:49,601 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.5) internal successors, (112), 34 states have internal predecessors, (112), 27 states have call successors, (35), 1 states have call predecessors, (35), 17 states have return successors, (45), 21 states have call predecessors, (45), 27 states have call successors, (45) Word has length 1768 [2024-11-28 04:53:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:49,607 INFO L225 Difference]: With dead ends: 552 [2024-11-28 04:53:49,607 INFO L226 Difference]: Without dead ends: 313 [2024-11-28 04:53:49,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3592 GetRequests, 3506 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=767, Invalid=5085, Unknown=0, NotChecked=0, Total=5852 [2024-11-28 04:53:49,612 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 133 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:49,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 808 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 04:53:49,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-11-28 04:53:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 290. [2024-11-28 04:53:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 204 states have (on average 1.0441176470588236) internal successors, (213), 202 states have internal predecessors, (213), 62 states have call successors, (62), 46 states have call predecessors, (62), 23 states have return successors, (139), 41 states have call predecessors, (139), 62 states have call successors, (139) [2024-11-28 04:53:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 414 transitions. [2024-11-28 04:53:49,654 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 414 transitions. Word has length 1768 [2024-11-28 04:53:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:49,655 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 414 transitions. [2024-11-28 04:53:49,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.5) internal successors, (112), 34 states have internal predecessors, (112), 27 states have call successors, (35), 1 states have call predecessors, (35), 17 states have return successors, (45), 21 states have call predecessors, (45), 27 states have call successors, (45) [2024-11-28 04:53:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 414 transitions. [2024-11-28 04:53:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1278 [2024-11-28 04:53:49,671 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:49,671 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 93, 93, 76, 75, 47, 47, 47, 47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 30, 28, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:49,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 04:53:49,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:49,872 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:49,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1885653303, now seen corresponding path program 17 times [2024-11-28 04:53:49,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:53:49,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834211886] [2024-11-28 04:53:49,873 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:53:49,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:53:50,251 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2024-11-28 04:53:50,251 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 48685 backedges. 5324 proven. 1892 refuted. 0 times theorem prover too weak. 41469 trivial. 0 not checked. [2024-11-28 04:53:53,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:53:53,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834211886] [2024-11-28 04:53:53,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834211886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:53,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353689641] [2024-11-28 04:53:53,031 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:53:53,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:53,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:53,033 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:53,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 04:53:54,304 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2024-11-28 04:53:54,304 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:54,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 2528 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 04:53:54,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 48685 backedges. 5373 proven. 1906 refuted. 0 times theorem prover too weak. 41406 trivial. 0 not checked. [2024-11-28 04:53:54,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 48685 backedges. 5373 proven. 1952 refuted. 0 times theorem prover too weak. 41360 trivial. 0 not checked. [2024-11-28 04:54:04,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353689641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:04,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:54:04,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 31] total 37 [2024-11-28 04:54:04,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326366670] [2024-11-28 04:54:04,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:04,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 04:54:04,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:04,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 04:54:04,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 04:54:04,735 INFO L87 Difference]: Start difference. First operand 290 states and 414 transitions. Second operand has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 31 states have call successors, (36), 1 states have call predecessors, (36), 17 states have return successors, (47), 16 states have call predecessors, (47), 31 states have call successors, (47) [2024-11-28 04:54:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:06,204 INFO L93 Difference]: Finished difference Result 600 states and 897 transitions. [2024-11-28 04:54:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 04:54:06,205 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 31 states have call successors, (36), 1 states have call predecessors, (36), 17 states have return successors, (47), 16 states have call predecessors, (47), 31 states have call successors, (47) Word has length 1277 [2024-11-28 04:54:06,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:06,213 INFO L225 Difference]: With dead ends: 600 [2024-11-28 04:54:06,214 INFO L226 Difference]: Without dead ends: 351 [2024-11-28 04:54:06,218 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2614 GetRequests, 2533 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=661, Invalid=3895, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 04:54:06,218 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 101 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:06,219 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 775 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:54:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2024-11-28 04:54:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 286. [2024-11-28 04:54:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 202 states have (on average 1.0445544554455446) internal successors, (211), 199 states have internal predecessors, (211), 60 states have call successors, (60), 46 states have call predecessors, (60), 23 states have return successors, (123), 40 states have call predecessors, (123), 60 states have call successors, (123) [2024-11-28 04:54:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 394 transitions. [2024-11-28 04:54:06,290 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 394 transitions. Word has length 1277 [2024-11-28 04:54:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:06,291 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 394 transitions. [2024-11-28 04:54:06,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 37 states have internal predecessors, (126), 31 states have call successors, (36), 1 states have call predecessors, (36), 17 states have return successors, (47), 16 states have call predecessors, (47), 31 states have call successors, (47) [2024-11-28 04:54:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 394 transitions. [2024-11-28 04:54:06,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1401 [2024-11-28 04:54:06,332 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:06,332 INFO L218 NwaCegarLoop]: trace histogram [106, 106, 99, 99, 85, 81, 53, 53, 53, 53, 53, 53, 53, 49, 49, 49, 49, 49, 49, 49, 36, 28, 21, 18, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:06,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 04:54:06,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:06,533 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:06,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:06,534 INFO L85 PathProgramCache]: Analyzing trace with hash -698359940, now seen corresponding path program 18 times [2024-11-28 04:54:06,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:06,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542414666] [2024-11-28 04:54:06,535 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:54:06,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:06,725 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-28 04:54:06,726 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 58690 backedges. 3665 proven. 207 refuted. 0 times theorem prover too weak. 54818 trivial. 0 not checked. [2024-11-28 04:54:07,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542414666] [2024-11-28 04:54:07,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542414666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983000904] [2024-11-28 04:54:07,462 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:54:07,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:07,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:07,464 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:07,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 04:54:08,435 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-28 04:54:08,435 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:08,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:54:08,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 58690 backedges. 8287 proven. 63 refuted. 0 times theorem prover too weak. 50340 trivial. 0 not checked. [2024-11-28 04:54:08,547 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 58690 backedges. 3485 proven. 191 refuted. 0 times theorem prover too weak. 55014 trivial. 0 not checked. [2024-11-28 04:54:13,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983000904] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:13,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:54:13,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 13] total 22 [2024-11-28 04:54:13,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831030128] [2024-11-28 04:54:13,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:13,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 04:54:13,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:13,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 04:54:13,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:54:13,731 INFO L87 Difference]: Start difference. First operand 286 states and 394 transitions. Second operand has 22 states, 21 states have (on average 4.238095238095238) internal successors, (89), 22 states have internal predecessors, (89), 12 states have call successors, (27), 2 states have call predecessors, (27), 8 states have return successors, (31), 14 states have call predecessors, (31), 12 states have call successors, (31) [2024-11-28 04:54:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:14,290 INFO L93 Difference]: Finished difference Result 531 states and 770 transitions. [2024-11-28 04:54:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:54:14,290 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.238095238095238) internal successors, (89), 22 states have internal predecessors, (89), 12 states have call successors, (27), 2 states have call predecessors, (27), 8 states have return successors, (31), 14 states have call predecessors, (31), 12 states have call successors, (31) Word has length 1400 [2024-11-28 04:54:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:14,295 INFO L225 Difference]: With dead ends: 531 [2024-11-28 04:54:14,296 INFO L226 Difference]: Without dead ends: 271 [2024-11-28 04:54:14,298 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2829 GetRequests, 2788 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 04:54:14,298 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:14,299 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 269 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:54:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-11-28 04:54:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 263. [2024-11-28 04:54:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 187 states have (on average 1.0481283422459893) internal successors, (196), 184 states have internal predecessors, (196), 53 states have call successors, (53), 43 states have call predecessors, (53), 22 states have return successors, (88), 35 states have call predecessors, (88), 53 states have call successors, (88) [2024-11-28 04:54:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 337 transitions. [2024-11-28 04:54:14,340 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 337 transitions. Word has length 1400 [2024-11-28 04:54:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:14,341 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 337 transitions. [2024-11-28 04:54:14,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.238095238095238) internal successors, (89), 22 states have internal predecessors, (89), 12 states have call successors, (27), 2 states have call predecessors, (27), 8 states have return successors, (31), 14 states have call predecessors, (31), 12 states have call successors, (31) [2024-11-28 04:54:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 337 transitions. [2024-11-28 04:54:14,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1854 [2024-11-28 04:54:14,442 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:14,443 INFO L218 NwaCegarLoop]: trace histogram [138, 138, 133, 133, 113, 110, 69, 69, 69, 69, 69, 69, 69, 66, 66, 66, 66, 66, 66, 66, 44, 44, 28, 20, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:14,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 04:54:14,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:14,644 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:14,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:14,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1472870423, now seen corresponding path program 19 times [2024-11-28 04:54:14,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:14,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035612964] [2024-11-28 04:54:14,646 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:54:14,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 103211 backedges. 2000 proven. 4117 refuted. 0 times theorem prover too weak. 97094 trivial. 0 not checked. [2024-11-28 04:54:19,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:19,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035612964] [2024-11-28 04:54:19,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035612964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:19,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806397631] [2024-11-28 04:54:19,019 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:54:19,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:19,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:19,022 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:19,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 04:54:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:20,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 4133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:54:20,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 103211 backedges. 1309 proven. 3794 refuted. 0 times theorem prover too weak. 98108 trivial. 0 not checked. [2024-11-28 04:54:20,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 103211 backedges. 1317 proven. 3811 refuted. 0 times theorem prover too weak. 98083 trivial. 0 not checked. [2024-11-28 04:54:28,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806397631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:28,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:54:28,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 17] total 27 [2024-11-28 04:54:28,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483603944] [2024-11-28 04:54:28,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:28,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 04:54:28,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:28,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 04:54:28,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:54:28,240 INFO L87 Difference]: Start difference. First operand 263 states and 337 transitions. Second operand has 27 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 27 states have internal predecessors, (88), 17 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 20 states have call predecessors, (37), 17 states have call successors, (37) [2024-11-28 04:54:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:28,704 INFO L93 Difference]: Finished difference Result 311 states and 417 transitions. [2024-11-28 04:54:28,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:54:28,704 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 27 states have internal predecessors, (88), 17 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 20 states have call predecessors, (37), 17 states have call successors, (37) Word has length 1853 [2024-11-28 04:54:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:28,709 INFO L225 Difference]: With dead ends: 311 [2024-11-28 04:54:28,709 INFO L226 Difference]: Without dead ends: 294 [2024-11-28 04:54:28,710 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3737 GetRequests, 3692 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:54:28,710 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 16 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:28,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 597 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:54:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-28 04:54:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 288. [2024-11-28 04:54:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 202 states have (on average 1.0445544554455446) internal successors, (211), 199 states have internal predecessors, (211), 58 states have call successors, (58), 43 states have call predecessors, (58), 27 states have return successors, (98), 45 states have call predecessors, (98), 58 states have call successors, (98) [2024-11-28 04:54:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 367 transitions. [2024-11-28 04:54:28,747 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 367 transitions. Word has length 1853 [2024-11-28 04:54:28,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:28,748 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 367 transitions. [2024-11-28 04:54:28,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 27 states have internal predecessors, (88), 17 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 20 states have call predecessors, (37), 17 states have call successors, (37) [2024-11-28 04:54:28,749 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 367 transitions. [2024-11-28 04:54:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1033 [2024-11-28 04:54:28,758 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:28,758 INFO L218 NwaCegarLoop]: trace histogram [76, 76, 75, 75, 61, 61, 38, 38, 38, 38, 38, 38, 38, 37, 37, 37, 37, 37, 37, 37, 24, 23, 15, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:28,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 04:54:28,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:28,959 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:28,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:28,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1241761113, now seen corresponding path program 20 times [2024-11-28 04:54:28,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:28,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671972002] [2024-11-28 04:54:28,960 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:54:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:29,068 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:54:29,068 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 31636 backedges. 2126 proven. 649 refuted. 0 times theorem prover too weak. 28861 trivial. 0 not checked. [2024-11-28 04:54:30,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:30,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671972002] [2024-11-28 04:54:30,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671972002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:30,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706867811] [2024-11-28 04:54:30,006 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:54:30,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:30,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:30,007 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:30,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 04:54:31,000 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:54:31,001 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:31,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 2311 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:54:31,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 31636 backedges. 2426 proven. 749 refuted. 0 times theorem prover too weak. 28461 trivial. 0 not checked. [2024-11-28 04:54:31,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 31636 backedges. 2432 proven. 776 refuted. 0 times theorem prover too weak. 28428 trivial. 0 not checked. [2024-11-28 04:54:36,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706867811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:36,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:54:36,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 19] total 22 [2024-11-28 04:54:36,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053247382] [2024-11-28 04:54:36,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:36,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 04:54:36,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:36,807 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 04:54:36,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:54:36,808 INFO L87 Difference]: Start difference. First operand 288 states and 367 transitions. Second operand has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 22 states have internal predecessors, (78), 17 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (29), 12 states have call predecessors, (29), 17 states have call successors, (29) [2024-11-28 04:54:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:37,130 INFO L93 Difference]: Finished difference Result 298 states and 376 transitions. [2024-11-28 04:54:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:54:37,130 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 22 states have internal predecessors, (78), 17 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (29), 12 states have call predecessors, (29), 17 states have call successors, (29) Word has length 1032 [2024-11-28 04:54:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:37,134 INFO L225 Difference]: With dead ends: 298 [2024-11-28 04:54:37,135 INFO L226 Difference]: Without dead ends: 288 [2024-11-28 04:54:37,135 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2086 GetRequests, 2050 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:54:37,136 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:37,136 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 227 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:54:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-11-28 04:54:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2024-11-28 04:54:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 202 states have (on average 1.0445544554455446) internal successors, (211), 199 states have internal predecessors, (211), 58 states have call successors, (58), 43 states have call predecessors, (58), 27 states have return successors, (91), 45 states have call predecessors, (91), 58 states have call successors, (91) [2024-11-28 04:54:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 360 transitions. [2024-11-28 04:54:37,182 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 360 transitions. Word has length 1032 [2024-11-28 04:54:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:37,184 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 360 transitions. [2024-11-28 04:54:37,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 22 states have internal predecessors, (78), 17 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (29), 12 states have call predecessors, (29), 17 states have call successors, (29) [2024-11-28 04:54:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 360 transitions. [2024-11-28 04:54:37,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1498 [2024-11-28 04:54:37,205 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:37,205 INFO L218 NwaCegarLoop]: trace histogram [110, 110, 109, 109, 91, 88, 55, 55, 55, 55, 55, 55, 55, 54, 54, 54, 54, 54, 54, 54, 36, 34, 22, 18, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:37,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 04:54:37,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:37,406 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:37,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:37,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2072674377, now seen corresponding path program 21 times [2024-11-28 04:54:37,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:37,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356492772] [2024-11-28 04:54:37,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:54:37,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:37,660 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2024-11-28 04:54:37,660 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 67111 backedges. 2611 proven. 1169 refuted. 0 times theorem prover too weak. 63331 trivial. 0 not checked. [2024-11-28 04:54:38,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:38,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356492772] [2024-11-28 04:54:38,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356492772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:38,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13154923] [2024-11-28 04:54:38,744 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:54:38,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:38,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:38,747 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:38,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 04:54:39,902 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2024-11-28 04:54:39,902 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:39,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:54:39,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 67111 backedges. 33356 proven. 4 refuted. 0 times theorem prover too weak. 33751 trivial. 0 not checked. [2024-11-28 04:54:39,991 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 67111 backedges. 2611 proven. 1169 refuted. 0 times theorem prover too weak. 63331 trivial. 0 not checked. [2024-11-28 04:54:45,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13154923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:45,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:54:45,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2024-11-28 04:54:45,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796722132] [2024-11-28 04:54:45,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:45,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:54:45,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:45,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:54:45,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:54:45,155 INFO L87 Difference]: Start difference. First operand 288 states and 360 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 6 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-11-28 04:54:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:45,333 INFO L93 Difference]: Finished difference Result 532 states and 687 transitions. [2024-11-28 04:54:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:54:45,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 6 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 1497 [2024-11-28 04:54:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:45,336 INFO L225 Difference]: With dead ends: 532 [2024-11-28 04:54:45,336 INFO L226 Difference]: Without dead ends: 273 [2024-11-28 04:54:45,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3004 GetRequests, 2985 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:54:45,338 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:45,338 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 223 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:54:45,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-11-28 04:54:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 271. [2024-11-28 04:54:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 192 states have (on average 1.046875) internal successors, (201), 189 states have internal predecessors, (201), 54 states have call successors, (54), 43 states have call predecessors, (54), 24 states have return successors, (73), 38 states have call predecessors, (73), 54 states have call successors, (73) [2024-11-28 04:54:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 328 transitions. [2024-11-28 04:54:45,380 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 328 transitions. Word has length 1497 [2024-11-28 04:54:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:45,381 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 328 transitions. [2024-11-28 04:54:45,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 6 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-11-28 04:54:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 328 transitions. [2024-11-28 04:54:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1496 [2024-11-28 04:54:45,401 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:45,402 INFO L218 NwaCegarLoop]: trace histogram [110, 110, 109, 109, 89, 88, 55, 55, 55, 55, 55, 55, 55, 54, 54, 54, 54, 54, 54, 54, 34, 34, 22, 20, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:45,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 04:54:45,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:45,603 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:45,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:45,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1775895019, now seen corresponding path program 22 times [2024-11-28 04:54:45,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:45,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454297730] [2024-11-28 04:54:45,606 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:54:45,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:45,934 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:54:45,934 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 66932 backedges. 2934 proven. 1957 refuted. 0 times theorem prover too weak. 62041 trivial. 0 not checked. [2024-11-28 04:54:47,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:47,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454297730] [2024-11-28 04:54:47,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454297730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:47,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595556823] [2024-11-28 04:54:47,973 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:54:47,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:47,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:47,974 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:47,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 04:54:48,992 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:54:48,992 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:49,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:54:49,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 66932 backedges. 3453 proven. 2409 refuted. 0 times theorem prover too weak. 61070 trivial. 0 not checked. [2024-11-28 04:54:49,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 66932 backedges. 3453 proven. 2461 refuted. 0 times theorem prover too weak. 61018 trivial. 0 not checked. [2024-11-28 04:54:59,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595556823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:59,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:54:59,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 29 [2024-11-28 04:54:59,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659065084] [2024-11-28 04:54:59,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:59,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:54:59,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:59,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:54:59,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:54:59,395 INFO L87 Difference]: Start difference. First operand 271 states and 328 transitions. Second operand has 29 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 29 states have internal predecessors, (93), 22 states have call successors, (28), 1 states have call predecessors, (28), 12 states have return successors, (36), 15 states have call predecessors, (36), 22 states have call successors, (36) [2024-11-28 04:54:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:59,884 INFO L93 Difference]: Finished difference Result 278 states and 334 transitions. [2024-11-28 04:54:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:54:59,884 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 29 states have internal predecessors, (93), 22 states have call successors, (28), 1 states have call predecessors, (28), 12 states have return successors, (36), 15 states have call predecessors, (36), 22 states have call successors, (36) Word has length 1495 [2024-11-28 04:54:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:59,888 INFO L225 Difference]: With dead ends: 278 [2024-11-28 04:54:59,888 INFO L226 Difference]: Without dead ends: 271 [2024-11-28 04:54:59,889 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3019 GetRequests, 2971 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:54:59,889 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 19 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:59,890 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 569 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:54:59,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-11-28 04:54:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2024-11-28 04:54:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 192 states have (on average 1.046875) internal successors, (201), 189 states have internal predecessors, (201), 54 states have call successors, (54), 43 states have call predecessors, (54), 24 states have return successors, (66), 38 states have call predecessors, (66), 54 states have call successors, (66) [2024-11-28 04:54:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 321 transitions. [2024-11-28 04:54:59,925 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 321 transitions. Word has length 1495 [2024-11-28 04:54:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:59,927 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 321 transitions. [2024-11-28 04:54:59,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.3214285714285716) internal successors, (93), 29 states have internal predecessors, (93), 22 states have call successors, (28), 1 states have call predecessors, (28), 12 states have return successors, (36), 15 states have call predecessors, (36), 22 states have call successors, (36) [2024-11-28 04:54:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 321 transitions. [2024-11-28 04:54:59,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2024-11-28 04:54:59,941 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:59,941 INFO L218 NwaCegarLoop]: trace histogram [84, 84, 83, 83, 68, 67, 42, 42, 42, 42, 42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 26, 26, 17, 15, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:59,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-28 04:55:00,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:55:00,142 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:55:00,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:55:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash 604830089, now seen corresponding path program 23 times [2024-11-28 04:55:00,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:55:00,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544597987] [2024-11-28 04:55:00,143 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:55:00,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:55:00,379 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 62 check-sat command(s) [2024-11-28 04:55:00,379 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:55:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 38769 backedges. 4072 proven. 821 refuted. 0 times theorem prover too weak. 33876 trivial. 0 not checked. [2024-11-28 04:55:02,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:55:02,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544597987] [2024-11-28 04:55:02,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544597987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:55:02,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916163487] [2024-11-28 04:55:02,651 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:55:02,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:55:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:55:02,653 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:55:02,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 04:55:04,119 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 62 check-sat command(s) [2024-11-28 04:55:04,120 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:55:04,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 2422 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:55:04,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:55:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 38769 backedges. 4274 proven. 901 refuted. 0 times theorem prover too weak. 33594 trivial. 0 not checked. [2024-11-28 04:55:04,293 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:55:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 38769 backedges. 4274 proven. 927 refuted. 0 times theorem prover too weak. 33568 trivial. 0 not checked. [2024-11-28 04:55:12,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916163487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:55:12,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:55:12,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 25] total 32 [2024-11-28 04:55:12,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750810895] [2024-11-28 04:55:12,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:55:12,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:55:12,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:55:12,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:55:12,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:55:12,036 INFO L87 Difference]: Start difference. First operand 271 states and 321 transitions. Second operand has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 24 states have call successors, (31), 1 states have call predecessors, (31), 13 states have return successors, (38), 15 states have call predecessors, (38), 24 states have call successors, (38) [2024-11-28 04:55:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:55:13,083 INFO L93 Difference]: Finished difference Result 318 states and 378 transitions. [2024-11-28 04:55:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 04:55:13,083 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 24 states have call successors, (31), 1 states have call predecessors, (31), 13 states have return successors, (38), 15 states have call predecessors, (38), 24 states have call successors, (38) Word has length 1141 [2024-11-28 04:55:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:55:13,090 INFO L225 Difference]: With dead ends: 318 [2024-11-28 04:55:13,090 INFO L226 Difference]: Without dead ends: 306 [2024-11-28 04:55:13,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2328 GetRequests, 2263 SyntacticMatches, 12 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 04:55:13,093 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 79 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:55:13,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 637 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:55:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-11-28 04:55:13,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 267. [2024-11-28 04:55:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 189 states have (on average 1.0423280423280423) internal successors, (197), 186 states have internal predecessors, (197), 53 states have call successors, (53), 42 states have call predecessors, (53), 24 states have return successors, (61), 38 states have call predecessors, (61), 53 states have call successors, (61) [2024-11-28 04:55:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 311 transitions. [2024-11-28 04:55:13,139 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 311 transitions. Word has length 1141 [2024-11-28 04:55:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:55:13,141 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 311 transitions. [2024-11-28 04:55:13,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 24 states have call successors, (31), 1 states have call predecessors, (31), 13 states have return successors, (38), 15 states have call predecessors, (38), 24 states have call successors, (38) [2024-11-28 04:55:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 311 transitions. [2024-11-28 04:55:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1210 [2024-11-28 04:55:13,156 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:55:13,156 INFO L218 NwaCegarLoop]: trace histogram [89, 89, 88, 88, 72, 71, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 28, 27, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:55:13,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 04:55:13,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-28 04:55:13,358 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:55:13,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:55:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash -553145382, now seen corresponding path program 24 times [2024-11-28 04:55:13,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:55:13,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662200711] [2024-11-28 04:55:13,359 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:55:13,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:55:13,808 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 77 check-sat command(s) [2024-11-28 04:55:13,808 INFO L230 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-28 04:55:13,808 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 04:55:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:55:14,329 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 04:55:14,329 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 04:55:14,330 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 04:55:14,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-28 04:55:14,337 INFO L422 BasicCegarLoop]: Path program histogram: [24, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:55:14,600 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 04:55:14,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:55:14 BoogieIcfgContainer [2024-11-28 04:55:14,607 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 04:55:14,608 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 04:55:14,609 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 04:55:14,609 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 04:55:14,610 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:51:27" (3/4) ... [2024-11-28 04:55:14,611 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-28 04:55:14,814 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 676. [2024-11-28 04:55:15,159 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 04:55:15,160 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 04:55:15,160 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 04:55:15,161 INFO L158 Benchmark]: Toolchain (without parser) took 227917.63ms. Allocated memory was 142.6MB in the beginning and 922.7MB in the end (delta: 780.1MB). Free memory was 105.2MB in the beginning and 325.5MB in the end (delta: -220.2MB). Peak memory consumption was 558.3MB. Max. memory is 16.1GB. [2024-11-28 04:55:15,162 INFO L158 Benchmark]: CDTParser took 0.86ms. Allocated memory is still 167.8MB. Free memory was 103.4MB in the beginning and 103.0MB in the end (delta: 436.2kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:55:15,162 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.88ms. Allocated memory is still 142.6MB. Free memory was 104.9MB in the beginning and 94.1MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:55:15,162 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.02ms. Allocated memory is still 142.6MB. Free memory was 94.1MB in the beginning and 93.1MB in the end (delta: 985.2kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:55:15,163 INFO L158 Benchmark]: Boogie Preprocessor took 45.89ms. Allocated memory is still 142.6MB. Free memory was 93.1MB in the beginning and 91.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:55:15,163 INFO L158 Benchmark]: RCFGBuilder took 330.38ms. Allocated memory is still 142.6MB. Free memory was 91.8MB in the beginning and 81.6MB in the end (delta: 10.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:55:15,163 INFO L158 Benchmark]: TraceAbstraction took 226693.18ms. Allocated memory was 142.6MB in the beginning and 922.7MB in the end (delta: 780.1MB). Free memory was 81.0MB in the beginning and 367.4MB in the end (delta: -286.4MB). Peak memory consumption was 491.2MB. Max. memory is 16.1GB. [2024-11-28 04:55:15,164 INFO L158 Benchmark]: Witness Printer took 552.14ms. Allocated memory is still 922.7MB. Free memory was 367.4MB in the beginning and 325.5MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2024-11-28 04:55:15,165 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.86ms. Allocated memory is still 167.8MB. Free memory was 103.4MB in the beginning and 103.0MB in the end (delta: 436.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.88ms. Allocated memory is still 142.6MB. Free memory was 104.9MB in the beginning and 94.1MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.02ms. Allocated memory is still 142.6MB. Free memory was 94.1MB in the beginning and 93.1MB in the end (delta: 985.2kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 45.89ms. Allocated memory is still 142.6MB. Free memory was 93.1MB in the beginning and 91.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 330.38ms. Allocated memory is still 142.6MB. Free memory was 91.8MB in the beginning and 81.6MB in the end (delta: 10.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 226693.18ms. Allocated memory was 142.6MB in the beginning and 922.7MB in the end (delta: 780.1MB). Free memory was 81.0MB in the beginning and 367.4MB in the end (delta: -286.4MB). Peak memory consumption was 491.2MB. Max. memory is 16.1GB. * Witness Printer took 552.14ms. Allocated memory is still 922.7MB. Free memory was 367.4MB in the beginning and 325.5MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 10; VAL [x=10] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=10] [L10] COND FALSE !(n < 1) VAL [\old(n)=10, n=10] [L12] COND FALSE !(n == 1) VAL [\old(n)=10, n=10] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=9] [L20] COND FALSE !(n < 1) VAL [\old(n)=9, n=9] [L22] COND FALSE !(n == 1) VAL [\old(n)=9, n=9] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=8] [L10] COND FALSE !(n < 1) VAL [\old(n)=8, n=8] [L12] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=7] [L20] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L22] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=6] [L10] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L12] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L20] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L22] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=5, n=5] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=6, n=6] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=7, n=7] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=7, n=7] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=8, n=8] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=6] [L20] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L22] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=6, n=6] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=6, n=6] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=8, n=8] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=9, n=9] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=7] [L10] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L12] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=6] [L20] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L22] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=6, n=6] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=6, n=6] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=7, n=7] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=5] [L20] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L22] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=5, n=5] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=7, n=7] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=9, n=9] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=10, n=10] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=8] [L20] COND FALSE !(n < 1) VAL [\old(n)=8, n=8] [L22] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=7] [L10] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L12] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=6] [L20] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L22] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=6, n=6] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=6, n=6] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=7, n=7] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=5] [L20] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L22] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=5, n=5] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=7, n=7] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=8, n=8] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=6] [L10] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L12] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L20] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L22] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=5, n=5] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=6, n=6] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=8, n=8] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=10, n=10] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) VAL [x=10] [L39] int result = fibo1(x); [L40] COND TRUE result == 55 VAL [x=10] [L41] reach_error() VAL [x=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 226.4s, OverallIterations: 32, TraceHistogramMax: 138, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.6s, AutomataDifference: 18.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1773 SdHoareTripleChecker+Valid, 10.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1644 mSDsluCounter, 10767 SdHoareTripleChecker+Invalid, 9.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9687 mSDsCounter, 1777 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14188 IncrementalHoareTripleChecker+Invalid, 15965 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1777 mSolverCounterUnsat, 1080 mSDtfsCounter, 14188 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 52190 GetRequests, 50944 SyntacticMatches, 217 SemanticMatches, 1029 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11972 ImplicationChecksByTransitivity, 15.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=290occurred in iteration=24, InterpolantAutomatonStates: 646, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 31 MinimizatonAttempts, 613 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.3s SsaConstructionTime, 9.1s SatisfiabilityAnalysisTime, 178.1s InterpolantComputationTime, 52612 NumberOfCodeBlocks, 37496 NumberOfCodeBlocksAsserted, 749 NumberOfCheckSat, 77005 ConstructedInterpolants, 0 QuantifiedInterpolants, 88215 SizeOfPredicates, 172 NumberOfNonLiveVariables, 40123 ConjunctsInSsa, 453 ConjunctsInUnsatCore, 89 InterpolantComputations, 2 PerfectInterpolantSequences, 2800964/2928999 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-28 04:55:15,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09889f01-7d91-4c08-b54d-b938343744e2/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE