./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_20-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/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_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_20-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/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_eea42ec1-7147-4814-9c7f-30e8df999993/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 3ed743515f4bceb442ae4e323a2d4b2eccbeef1c0a0d2152663feb9a9e538afb --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:08:28,065 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:08:28,168 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:08:28,175 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:08:28,175 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:08:28,208 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:08:28,209 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:08:28,209 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:08:28,209 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:08:28,210 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:08:28,210 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:08:28,210 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:08:28,210 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:08:28,210 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:08:28,210 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:08:28,211 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:08:28,211 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:08:28,211 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:08:28,213 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:08:28,213 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:08:28,213 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:08:28,213 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:08:28,214 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:08:28,214 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:08:28,214 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:08:28,214 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:08:28,214 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:08:28,214 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:08:28,214 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:08:28,214 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:08:28,215 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:08:28,215 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:08:28,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:28,215 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:08:28,215 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:08:28,215 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:08:28,216 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:08:28,216 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:28,216 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:08:28,216 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:08:28,216 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:08:28,216 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:08:28,216 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:08:28,216 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:08:28,217 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:08:28,217 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:08:28,217 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:08:28,217 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:08:28,217 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_eea42ec1-7147-4814-9c7f-30e8df999993/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 -> 3ed743515f4bceb442ae4e323a2d4b2eccbeef1c0a0d2152663feb9a9e538afb [2024-11-27 20:08:28,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:08:28,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:08:28,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:08:28,537 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:08:28,537 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:08:28,538 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursive-simple/fibo_20-1.c [2024-11-27 20:08:31,636 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/data/614d9e9f0/46b956d75108402cbc0278c4299d62c6/FLAG227296bef [2024-11-27 20:08:31,874 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:08:31,875 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/sv-benchmarks/c/recursive-simple/fibo_20-1.c [2024-11-27 20:08:31,886 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/data/614d9e9f0/46b956d75108402cbc0278c4299d62c6/FLAG227296bef [2024-11-27 20:08:31,909 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/data/614d9e9f0/46b956d75108402cbc0278c4299d62c6 [2024-11-27 20:08:31,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:08:31,914 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:08:31,918 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:08:31,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:08:31,923 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:08:31,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:08:31" (1/1) ... [2024-11-27 20:08:31,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42055d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:31, skipping insertion in model container [2024-11-27 20:08:31,926 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:08:31" (1/1) ... [2024-11-27 20:08:31,941 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:08:32,099 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_eea42ec1-7147-4814-9c7f-30e8df999993/sv-benchmarks/c/recursive-simple/fibo_20-1.c[745,758] [2024-11-27 20:08:32,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:08:32,112 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:08:32,125 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_eea42ec1-7147-4814-9c7f-30e8df999993/sv-benchmarks/c/recursive-simple/fibo_20-1.c[745,758] [2024-11-27 20:08:32,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:08:32,142 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:08:32,143 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32 WrapperNode [2024-11-27 20:08:32,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:08:32,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:08:32,145 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:08:32,145 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:08:32,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,162 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,182 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-27 20:08:32,183 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:08:32,184 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:08:32,186 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:08:32,186 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:08:32,196 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,198 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,209 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]. [2024-11-27 20:08:32,209 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,209 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,212 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,213 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,215 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,216 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,217 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,218 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:08:32,219 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:08:32,219 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:08:32,220 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:08:32,221 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (1/1) ... [2024-11-27 20:08:32,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:32,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:32,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:08:32,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:08:32,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:08:32,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:08:32,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:08:32,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:08:32,298 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-11-27 20:08:32,298 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-11-27 20:08:32,357 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:08:32,359 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:08:32,505 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-27 20:08:32,506 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:08:32,518 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:08:32,519 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-27 20:08:32,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:32 BoogieIcfgContainer [2024-11-27 20:08:32,520 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:08:32,523 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:08:32,523 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:08:32,528 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:08:32,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:08:31" (1/3) ... [2024-11-27 20:08:32,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c19a17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:08:32, skipping insertion in model container [2024-11-27 20:08:32,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:32" (2/3) ... [2024-11-27 20:08:32,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c19a17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:08:32, skipping insertion in model container [2024-11-27 20:08:32,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:32" (3/3) ... [2024-11-27 20:08:32,531 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_20-1.c [2024-11-27 20:08:32,545 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:08:32,546 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_20-1.c that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-27 20:08:32,611 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:08:32,626 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;@7a1e4dea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:08:32,626 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 20:08:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-27 20:08:32,636 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:32,637 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:32,638 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:32,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:32,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1755511548, now seen corresponding path program 1 times [2024-11-27 20:08:32,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:32,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673988775] [2024-11-27 20:08:32,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:32,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:32,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:32,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673988775] [2024-11-27 20:08:32,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673988775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:32,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:32,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:08:32,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113099028] [2024-11-27 20:08:32,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:32,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:08:32,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:32,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:08:32,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:08:32,960 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:08:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:33,036 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2024-11-27 20:08:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:08:33,039 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 [2024-11-27 20:08:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:33,050 INFO L225 Difference]: With dead ends: 30 [2024-11-27 20:08:33,050 INFO L226 Difference]: Without dead ends: 18 [2024-11-27 20:08:33,053 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 [2024-11-27 20:08:33,057 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:33,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-27 20:08:33,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-27 20:08:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:08:33,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-27 20:08:33,099 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2024-11-27 20:08:33,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:33,100 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-27 20:08:33,101 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) [2024-11-27 20:08:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-27 20:08:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-27 20:08:33,103 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:33,104 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:33,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:08:33,105 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:33,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2128459596, now seen corresponding path program 1 times [2024-11-27 20:08:33,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:33,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963374012] [2024-11-27 20:08:33,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:33,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:33,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:33,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963374012] [2024-11-27 20:08:33,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963374012] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:33,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:33,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:08:33,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865256127] [2024-11-27 20:08:33,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:33,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:08:33,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:33,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:08:33,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:08:33,270 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:08:33,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:33,293 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2024-11-27 20:08:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:08:33,294 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 [2024-11-27 20:08:33,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:33,295 INFO L225 Difference]: With dead ends: 24 [2024-11-27 20:08:33,295 INFO L226 Difference]: Without dead ends: 20 [2024-11-27 20:08:33,295 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 [2024-11-27 20:08:33,296 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:33,297 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:08:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-27 20:08:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2024-11-27 20:08:33,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:08:33,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-27 20:08:33,309 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2024-11-27 20:08:33,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:33,309 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-27 20:08:33,310 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) [2024-11-27 20:08:33,310 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-27 20:08:33,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 20:08:33,311 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:33,311 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:33,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:08:33,313 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:33,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:33,314 INFO L85 PathProgramCache]: Analyzing trace with hash -42544313, now seen corresponding path program 1 times [2024-11-27 20:08:33,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:33,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816139699] [2024-11-27 20:08:33,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:33,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:08:33,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:33,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816139699] [2024-11-27 20:08:33,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816139699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:33,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142734079] [2024-11-27 20:08:33,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:33,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:33,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:33,582 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:33,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:08:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:33,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:08:33,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:08:33,814 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:08:34,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142734079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:34,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:34,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2024-11-27 20:08:34,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805756292] [2024-11-27 20:08:34,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:34,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 20:08:34,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:34,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 20:08:34,162 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:08:34,163 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-27 20:08:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:34,305 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2024-11-27 20:08:34,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:08:34,306 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2024-11-27 20:08:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:34,307 INFO L225 Difference]: With dead ends: 35 [2024-11-27 20:08:34,307 INFO L226 Difference]: Without dead ends: 20 [2024-11-27 20:08:34,308 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:08:34,308 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:34,309 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-27 20:08:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-27 20:08:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-27 20:08:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-11-27 20:08:34,319 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2024-11-27 20:08:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:34,319 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-11-27 20:08:34,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.5) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-27 20:08:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-11-27 20:08:34,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 20:08:34,323 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:34,323 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:34,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:08:34,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:34,523 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:34,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash 170813287, now seen corresponding path program 1 times [2024-11-27 20:08:34,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:34,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219282620] [2024-11-27 20:08:34,524 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:34,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:08:34,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:34,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219282620] [2024-11-27 20:08:34,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219282620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:34,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74201210] [2024-11-27 20:08:34,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:34,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:34,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:34,637 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:34,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:08:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:34,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:08:34,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:08:34,733 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:08:34,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74201210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:34,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:34,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2024-11-27 20:08:34,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681091813] [2024-11-27 20:08:34,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:34,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 20:08:34,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:34,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 20:08:34,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:08:34,984 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:08:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:35,069 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2024-11-27 20:08:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:08:35,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-11-27 20:08:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:35,072 INFO L225 Difference]: With dead ends: 29 [2024-11-27 20:08:35,072 INFO L226 Difference]: Without dead ends: 25 [2024-11-27 20:08:35,073 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:08:35,073 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:35,074 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:35,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-27 20:08:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-27 20:08:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-27 20:08:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2024-11-27 20:08:35,085 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2024-11-27 20:08:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:35,089 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2024-11-27 20:08:35,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 20:08:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2024-11-27 20:08:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-27 20:08:35,092 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:35,093 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:35,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 20:08:35,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:35,293 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:35,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:35,294 INFO L85 PathProgramCache]: Analyzing trace with hash -187634876, now seen corresponding path program 2 times [2024-11-27 20:08:35,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:35,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919719668] [2024-11-27 20:08:35,294 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:08:35,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:35,349 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:08:35,349 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-27 20:08:35,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:35,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919719668] [2024-11-27 20:08:35,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919719668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:35,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232492631] [2024-11-27 20:08:35,637 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:08:35,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:35,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:35,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:35,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:08:35,701 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:08:35,701 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:35,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:08:35,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:08:35,850 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 20:08:36,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232492631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:36,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:36,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 20 [2024-11-27 20:08:36,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501819849] [2024-11-27 20:08:36,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:36,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-27 20:08:36,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:36,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-27 20:08:36,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:08:36,327 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-27 20:08:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:36,784 INFO L93 Difference]: Finished difference Result 46 states and 83 transitions. [2024-11-27 20:08:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 20:08:36,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) Word has length 37 [2024-11-27 20:08:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:36,787 INFO L225 Difference]: With dead ends: 46 [2024-11-27 20:08:36,787 INFO L226 Difference]: Without dead ends: 42 [2024-11-27 20:08:36,788 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2024-11-27 20:08:36,792 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:36,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 95 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:08:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-27 20:08:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2024-11-27 20:08:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-27 20:08:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 46 transitions. [2024-11-27 20:08:36,807 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 46 transitions. Word has length 37 [2024-11-27 20:08:36,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:36,808 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 46 transitions. [2024-11-27 20:08:36,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-27 20:08:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 46 transitions. [2024-11-27 20:08:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-27 20:08:36,813 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:36,814 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 8, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:36,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:37,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:37,019 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:37,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:37,019 INFO L85 PathProgramCache]: Analyzing trace with hash 710953508, now seen corresponding path program 3 times [2024-11-27 20:08:37,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:37,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957630965] [2024-11-27 20:08:37,020 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:08:37,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:37,048 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-27 20:08:37,048 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 167 proven. 27 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-11-27 20:08:37,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:37,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957630965] [2024-11-27 20:08:37,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957630965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:37,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690743633] [2024-11-27 20:08:37,251 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:08:37,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:37,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:37,253 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:37,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:08:37,335 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-27 20:08:37,335 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:37,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:08:37,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:37,425 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 207 proven. 12 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-27 20:08:37,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 169 proven. 25 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-11-27 20:08:38,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690743633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:38,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:38,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 13 [2024-11-27 20:08:38,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441899331] [2024-11-27 20:08:38,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:38,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:08:38,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:38,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:08:38,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:08:38,078 INFO L87 Difference]: Start difference. First operand 30 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-27 20:08:38,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:38,239 INFO L93 Difference]: Finished difference Result 62 states and 110 transitions. [2024-11-27 20:08:38,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:08:38,239 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2024-11-27 20:08:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:38,241 INFO L225 Difference]: With dead ends: 62 [2024-11-27 20:08:38,241 INFO L226 Difference]: Without dead ends: 35 [2024-11-27 20:08:38,242 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 172 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:08:38,242 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:38,243 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 62 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-27 20:08:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-11-27 20:08:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-27 20:08:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2024-11-27 20:08:38,253 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 90 [2024-11-27 20:08:38,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:38,253 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2024-11-27 20:08:38,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-27 20:08:38,253 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2024-11-27 20:08:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-27 20:08:38,255 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:38,255 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:38,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:38,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:38,456 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:38,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2015531204, now seen corresponding path program 4 times [2024-11-27 20:08:38,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:38,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768660699] [2024-11-27 20:08:38,457 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:08:38,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:38,474 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:08:38,475 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 96 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-27 20:08:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768660699] [2024-11-27 20:08:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768660699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95194972] [2024-11-27 20:08:38,735 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:08:38,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:38,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:38,737 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:38,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:08:38,805 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:08:38,805 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:38,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 20:08:38,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-27 20:08:38,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-27 20:08:39,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95194972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:39,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:39,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 11] total 17 [2024-11-27 20:08:39,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754112169] [2024-11-27 20:08:39,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:39,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 20:08:39,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:39,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 20:08:39,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:08:39,672 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-27 20:08:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:39,986 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2024-11-27 20:08:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:08:39,987 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) Word has length 65 [2024-11-27 20:08:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:39,989 INFO L225 Difference]: With dead ends: 81 [2024-11-27 20:08:39,989 INFO L226 Difference]: Without dead ends: 77 [2024-11-27 20:08:39,990 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:08:39,991 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:39,991 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 70 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:08:39,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-27 20:08:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2024-11-27 20:08:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (38), 16 states have call predecessors, (38), 12 states have call successors, (38) [2024-11-27 20:08:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 97 transitions. [2024-11-27 20:08:40,015 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 97 transitions. Word has length 65 [2024-11-27 20:08:40,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:40,019 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 97 transitions. [2024-11-27 20:08:40,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.357142857142857) internal successors, (47), 17 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-27 20:08:40,019 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 97 transitions. [2024-11-27 20:08:40,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2024-11-27 20:08:40,027 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:40,027 INFO L218 NwaCegarLoop]: trace histogram [43, 43, 35, 21, 21, 21, 21, 21, 21, 21, 14, 8, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:40,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:40,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:40,228 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:40,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2001495241, now seen corresponding path program 5 times [2024-11-27 20:08:40,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104073877] [2024-11-27 20:08:40,229 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:08:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:40,271 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-27 20:08:40,271 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 480 proven. 604 refuted. 0 times theorem prover too weak. 3963 trivial. 0 not checked. [2024-11-27 20:08:40,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:40,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104073877] [2024-11-27 20:08:40,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104073877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:40,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070283835] [2024-11-27 20:08:40,655 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:08:40,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:40,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:40,658 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:40,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:08:40,780 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-27 20:08:40,780 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:40,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:08:40,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 2907 proven. 92 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2024-11-27 20:08:40,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 539 proven. 765 refuted. 0 times theorem prover too weak. 3743 trivial. 0 not checked. [2024-11-27 20:08:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070283835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:43,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:43,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 20 [2024-11-27 20:08:43,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585820168] [2024-11-27 20:08:43,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:43,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-27 20:08:43,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:43,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-27 20:08:43,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:08:43,317 INFO L87 Difference]: Start difference. First operand 64 states and 97 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 13 states have call successors, (19), 2 states have call predecessors, (19), 7 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-27 20:08:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:43,562 INFO L93 Difference]: Finished difference Result 188 states and 375 transitions. [2024-11-27 20:08:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 20:08:43,563 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 13 states have call successors, (19), 2 states have call predecessors, (19), 7 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) Word has length 297 [2024-11-27 20:08:43,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:43,566 INFO L225 Difference]: With dead ends: 188 [2024-11-27 20:08:43,567 INFO L226 Difference]: Without dead ends: 129 [2024-11-27 20:08:43,569 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 582 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2024-11-27 20:08:43,569 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:43,570 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 119 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:08:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-27 20:08:43,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2024-11-27 20:08:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 74 states have (on average 1.054054054054054) internal successors, (78), 72 states have internal predecessors, (78), 22 states have call successors, (22), 10 states have call predecessors, (22), 14 states have return successors, (84), 28 states have call predecessors, (84), 22 states have call successors, (84) [2024-11-27 20:08:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 184 transitions. [2024-11-27 20:08:43,615 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 184 transitions. Word has length 297 [2024-11-27 20:08:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:43,615 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 184 transitions. [2024-11-27 20:08:43,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 13 states have call successors, (19), 2 states have call predecessors, (19), 7 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-27 20:08:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 184 transitions. [2024-11-27 20:08:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2024-11-27 20:08:43,624 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:43,624 INFO L218 NwaCegarLoop]: trace histogram [35, 35, 33, 17, 17, 17, 17, 17, 17, 17, 16, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:43,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:43,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:43,825 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:43,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1468134057, now seen corresponding path program 6 times [2024-11-27 20:08:43,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:43,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956113530] [2024-11-27 20:08:43,826 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:08:43,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:43,865 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-27 20:08:43,865 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3452 backedges. 578 proven. 2 refuted. 0 times theorem prover too weak. 2872 trivial. 0 not checked. [2024-11-27 20:08:43,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:43,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956113530] [2024-11-27 20:08:43,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956113530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:43,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361195084] [2024-11-27 20:08:43,979 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:08:43,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:43,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:43,982 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:43,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:08:44,093 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-27 20:08:44,094 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:44,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:08:44,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3452 backedges. 576 proven. 4 refuted. 0 times theorem prover too weak. 2872 trivial. 0 not checked. [2024-11-27 20:08:44,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3452 backedges. 576 proven. 4 refuted. 0 times theorem prover too weak. 2872 trivial. 0 not checked. [2024-11-27 20:08:45,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361195084] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:45,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:45,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2024-11-27 20:08:45,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433012782] [2024-11-27 20:08:45,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:45,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 20:08:45,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:45,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 20:08:45,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:08:45,042 INFO L87 Difference]: Start difference. First operand 111 states and 184 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-27 20:08:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:45,182 INFO L93 Difference]: Finished difference Result 208 states and 389 transitions. [2024-11-27 20:08:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:08:45,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 247 [2024-11-27 20:08:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:45,186 INFO L225 Difference]: With dead ends: 208 [2024-11-27 20:08:45,189 INFO L226 Difference]: Without dead ends: 101 [2024-11-27 20:08:45,190 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 488 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:08:45,191 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:45,195 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 49 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:45,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-27 20:08:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-27 20:08:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 66 states have internal predecessors, (71), 20 states have call successors, (20), 10 states have call predecessors, (20), 12 states have return successors, (65), 24 states have call predecessors, (65), 20 states have call successors, (65) [2024-11-27 20:08:45,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 156 transitions. [2024-11-27 20:08:45,242 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 156 transitions. Word has length 247 [2024-11-27 20:08:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:45,244 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 156 transitions. [2024-11-27 20:08:45,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-27 20:08:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 156 transitions. [2024-11-27 20:08:45,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2024-11-27 20:08:45,251 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:45,252 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:45,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:08:45,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:45,452 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:45,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:45,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1022210831, now seen corresponding path program 7 times [2024-11-27 20:08:45,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:45,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176374111] [2024-11-27 20:08:45,453 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:08:45,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 716 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2024-11-27 20:08:45,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:45,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176374111] [2024-11-27 20:08:45,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176374111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:45,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538562663] [2024-11-27 20:08:45,964 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:08:45,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:45,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:45,967 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:45,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:08:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:46,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:08:46,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 716 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2024-11-27 20:08:46,245 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 756 refuted. 0 times theorem prover too weak. 1716 trivial. 0 not checked. [2024-11-27 20:08:48,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538562663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:48,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:48,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2024-11-27 20:08:48,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017960407] [2024-11-27 20:08:48,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:48,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 20:08:48,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:48,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 20:08:48,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:08:48,249 INFO L87 Difference]: Start difference. First operand 101 states and 156 transitions. Second operand has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2024-11-27 20:08:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:48,447 INFO L93 Difference]: Finished difference Result 149 states and 297 transitions. [2024-11-27 20:08:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:08:48,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) Word has length 215 [2024-11-27 20:08:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:48,451 INFO L225 Difference]: With dead ends: 149 [2024-11-27 20:08:48,452 INFO L226 Difference]: Without dead ends: 145 [2024-11-27 20:08:48,452 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 422 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:08:48,453 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:48,454 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 86 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-27 20:08:48,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2024-11-27 20:08:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 69 states have internal predecessors, (74), 21 states have call successors, (21), 10 states have call predecessors, (21), 13 states have return successors, (75), 26 states have call predecessors, (75), 21 states have call successors, (75) [2024-11-27 20:08:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 170 transitions. [2024-11-27 20:08:48,491 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 170 transitions. Word has length 215 [2024-11-27 20:08:48,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:48,492 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 170 transitions. [2024-11-27 20:08:48,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.466666666666667) internal successors, (52), 17 states have internal predecessors, (52), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2024-11-27 20:08:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 170 transitions. [2024-11-27 20:08:48,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2024-11-27 20:08:48,499 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:48,499 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:48,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:08:48,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:48,704 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:48,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1104926743, now seen corresponding path program 8 times [2024-11-27 20:08:48,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:48,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161933006] [2024-11-27 20:08:48,704 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:08:48,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:48,765 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:08:48,766 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 225 proven. 1327 refuted. 0 times theorem prover too weak. 4487 trivial. 0 not checked. [2024-11-27 20:08:49,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:49,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161933006] [2024-11-27 20:08:49,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161933006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:49,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111586049] [2024-11-27 20:08:49,440 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:08:49,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:49,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:49,443 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:49,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:08:49,658 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:08:49,658 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:49,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 20:08:49,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 225 proven. 1327 refuted. 0 times theorem prover too weak. 4487 trivial. 0 not checked. [2024-11-27 20:08:49,791 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 225 proven. 1384 refuted. 0 times theorem prover too weak. 4430 trivial. 0 not checked. [2024-11-27 20:08:52,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111586049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:52,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:52,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2024-11-27 20:08:52,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372115834] [2024-11-27 20:08:52,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:52,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 20:08:52,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:52,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 20:08:52,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2024-11-27 20:08:52,499 INFO L87 Difference]: Start difference. First operand 106 states and 170 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-27 20:08:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:52,692 INFO L93 Difference]: Finished difference Result 161 states and 347 transitions. [2024-11-27 20:08:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:08:52,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 324 [2024-11-27 20:08:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:52,699 INFO L225 Difference]: With dead ends: 161 [2024-11-27 20:08:52,699 INFO L226 Difference]: Without dead ends: 157 [2024-11-27 20:08:52,700 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 639 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2024-11-27 20:08:52,701 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:52,702 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-27 20:08:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 111. [2024-11-27 20:08:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 72 states have internal predecessors, (77), 22 states have call successors, (22), 10 states have call predecessors, (22), 14 states have return successors, (87), 28 states have call predecessors, (87), 22 states have call successors, (87) [2024-11-27 20:08:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 186 transitions. [2024-11-27 20:08:52,748 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 186 transitions. Word has length 324 [2024-11-27 20:08:52,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:52,749 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 186 transitions. [2024-11-27 20:08:52,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 19 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-27 20:08:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 186 transitions. [2024-11-27 20:08:52,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 706 [2024-11-27 20:08:52,767 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:52,768 INFO L218 NwaCegarLoop]: trace histogram [103, 103, 83, 51, 51, 51, 51, 51, 51, 51, 32, 20, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:52,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:08:52,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-27 20:08:52,972 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:52,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:52,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1177983657, now seen corresponding path program 9 times [2024-11-27 20:08:52,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:52,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279101334] [2024-11-27 20:08:52,973 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:08:52,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:53,070 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-27 20:08:53,070 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 29515 backedges. 3157 proven. 125 refuted. 0 times theorem prover too weak. 26233 trivial. 0 not checked. [2024-11-27 20:08:53,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:53,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279101334] [2024-11-27 20:08:53,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279101334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:53,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649817523] [2024-11-27 20:08:53,448 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:08:53,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:53,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:53,451 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:53,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:08:53,720 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-27 20:08:53,721 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:53,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:08:53,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 29515 backedges. 3153 proven. 123 refuted. 0 times theorem prover too weak. 26239 trivial. 0 not checked. [2024-11-27 20:08:53,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 29515 backedges. 3153 proven. 134 refuted. 0 times theorem prover too weak. 26228 trivial. 0 not checked. [2024-11-27 20:08:57,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649817523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:57,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:57,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13] total 18 [2024-11-27 20:08:57,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717507718] [2024-11-27 20:08:57,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:57,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:08:57,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:57,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:08:57,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:08:57,359 INFO L87 Difference]: Start difference. First operand 111 states and 186 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 7 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 11 states have call predecessors, (18), 7 states have call successors, (18) [2024-11-27 20:08:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:57,667 INFO L93 Difference]: Finished difference Result 279 states and 610 transitions. [2024-11-27 20:08:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:08:57,667 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 7 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 11 states have call predecessors, (18), 7 states have call successors, (18) Word has length 705 [2024-11-27 20:08:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:57,673 INFO L225 Difference]: With dead ends: 279 [2024-11-27 20:08:57,673 INFO L226 Difference]: Without dead ends: 173 [2024-11-27 20:08:57,675 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1428 GetRequests, 1399 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2024-11-27 20:08:57,675 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 41 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:57,676 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 121 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:08:57,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-27 20:08:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 149. [2024-11-27 20:08:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 98 states have (on average 1.030612244897959) internal successors, (101), 96 states have internal predecessors, (101), 32 states have call successors, (32), 13 states have call predecessors, (32), 18 states have return successors, (152), 39 states have call predecessors, (152), 32 states have call successors, (152) [2024-11-27 20:08:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 285 transitions. [2024-11-27 20:08:57,707 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 285 transitions. Word has length 705 [2024-11-27 20:08:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:57,708 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 285 transitions. [2024-11-27 20:08:57,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 7 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 11 states have call predecessors, (18), 7 states have call successors, (18) [2024-11-27 20:08:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 285 transitions. [2024-11-27 20:08:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2024-11-27 20:08:57,717 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:57,717 INFO L218 NwaCegarLoop]: trace histogram [123, 123, 97, 61, 61, 61, 61, 61, 61, 61, 36, 26, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:57,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:57,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 20:08:57,922 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:57,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:57,922 INFO L85 PathProgramCache]: Analyzing trace with hash -549763525, now seen corresponding path program 10 times [2024-11-27 20:08:57,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:57,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554873367] [2024-11-27 20:08:57,922 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:08:57,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:58,060 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:08:58,060 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 41988 backedges. 810 proven. 4581 refuted. 0 times theorem prover too weak. 36597 trivial. 0 not checked. [2024-11-27 20:08:59,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:59,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554873367] [2024-11-27 20:08:59,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554873367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:59,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978539804] [2024-11-27 20:08:59,394 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:08:59,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:59,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:59,397 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:59,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:08:59,767 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:08:59,767 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:59,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 20:08:59,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 41988 backedges. 10819 proven. 255 refuted. 0 times theorem prover too weak. 30914 trivial. 0 not checked. [2024-11-27 20:08:59,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 41988 backedges. 844 proven. 4992 refuted. 0 times theorem prover too weak. 36152 trivial. 0 not checked. [2024-11-27 20:09:04,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978539804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:04,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:04,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17] total 22 [2024-11-27 20:09:04,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758772319] [2024-11-27 20:09:04,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:04,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 20:09:04,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:04,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 20:09:04,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:09:04,439 INFO L87 Difference]: Start difference. First operand 149 states and 285 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 15 states have call successors, (22), 2 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 15 states have call successors, (27) [2024-11-27 20:09:04,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:09:04,938 INFO L93 Difference]: Finished difference Result 227 states and 470 transitions. [2024-11-27 20:09:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 20:09:04,939 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 15 states have call successors, (22), 2 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 15 states have call successors, (27) Word has length 839 [2024-11-27 20:09:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:09:04,941 INFO L225 Difference]: With dead ends: 227 [2024-11-27 20:09:04,942 INFO L226 Difference]: Without dead ends: 81 [2024-11-27 20:09:04,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1709 GetRequests, 1665 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=391, Invalid=1015, Unknown=0, NotChecked=0, Total=1406 [2024-11-27 20:09:04,945 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 90 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:09:04,945 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 106 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:09:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-27 20:09:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2024-11-27 20:09:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.04) internal successors, (52), 48 states have internal predecessors, (52), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (36), 15 states have call predecessors, (36), 12 states have call successors, (36) [2024-11-27 20:09:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 100 transitions. [2024-11-27 20:09:04,957 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 100 transitions. Word has length 839 [2024-11-27 20:09:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:09:04,958 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 100 transitions. [2024-11-27 20:09:04,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 22 states have internal predecessors, (73), 15 states have call successors, (22), 2 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 15 states have call successors, (27) [2024-11-27 20:09:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 100 transitions. [2024-11-27 20:09:04,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2024-11-27 20:09:04,963 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:09:04,964 INFO L218 NwaCegarLoop]: trace histogram [95, 95, 77, 47, 47, 47, 47, 47, 47, 47, 30, 18, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:04,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 20:09:05,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 20:09:05,164 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:09:05,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:05,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2104118111, now seen corresponding path program 11 times [2024-11-27 20:09:05,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:05,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825381120] [2024-11-27 20:09:05,168 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:09:05,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:05,374 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2024-11-27 20:09:05,374 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 3548 proven. 1617 refuted. 0 times theorem prover too weak. 19945 trivial. 0 not checked. [2024-11-27 20:09:06,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825381120] [2024-11-27 20:09:06,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825381120] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:06,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591097759] [2024-11-27 20:09:06,369 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:09:06,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:06,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:06,371 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:06,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:09:06,852 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2024-11-27 20:09:06,852 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:06,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 20:09:06,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 10042 proven. 813 refuted. 0 times theorem prover too weak. 14255 trivial. 0 not checked. [2024-11-27 20:09:07,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25110 backedges. 3538 proven. 1656 refuted. 0 times theorem prover too weak. 19916 trivial. 0 not checked. [2024-11-27 20:09:11,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591097759] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:11,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:11,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 22] total 29 [2024-11-27 20:09:11,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639549182] [2024-11-27 20:09:11,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:11,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-27 20:09:11,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:11,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-27 20:09:11,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2024-11-27 20:09:11,662 INFO L87 Difference]: Start difference. First operand 72 states and 100 transitions. Second operand has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 22 states have call successors, (28), 2 states have call predecessors, (28), 11 states have return successors, (36), 12 states have call predecessors, (36), 22 states have call successors, (36) [2024-11-27 20:09:12,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:09:12,249 INFO L93 Difference]: Finished difference Result 154 states and 245 transitions. [2024-11-27 20:09:12,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-27 20:09:12,250 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 22 states have call successors, (28), 2 states have call predecessors, (28), 11 states have return successors, (36), 12 states have call predecessors, (36), 22 states have call successors, (36) Word has length 651 [2024-11-27 20:09:12,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:09:12,254 INFO L225 Difference]: With dead ends: 154 [2024-11-27 20:09:12,254 INFO L226 Difference]: Without dead ends: 87 [2024-11-27 20:09:12,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1342 GetRequests, 1286 SyntacticMatches, 10 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=594, Invalid=1662, Unknown=0, NotChecked=0, Total=2256 [2024-11-27 20:09:12,256 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 171 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:09:12,257 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 129 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:09:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-27 20:09:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2024-11-27 20:09:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 56 states have internal predecessors, (62), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (34), 15 states have call predecessors, (34), 14 states have call successors, (34) [2024-11-27 20:09:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 110 transitions. [2024-11-27 20:09:12,269 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 110 transitions. Word has length 651 [2024-11-27 20:09:12,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:09:12,269 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 110 transitions. [2024-11-27 20:09:12,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 22 states have call successors, (28), 2 states have call predecessors, (28), 11 states have return successors, (36), 12 states have call predecessors, (36), 22 states have call successors, (36) [2024-11-27 20:09:12,270 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 110 transitions. [2024-11-27 20:09:12,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2024-11-27 20:09:12,273 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:09:12,274 INFO L218 NwaCegarLoop]: trace histogram [77, 77, 62, 38, 38, 38, 38, 38, 38, 38, 24, 15, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:12,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:12,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 20:09:12,479 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:09:12,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:12,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1042599522, now seen corresponding path program 12 times [2024-11-27 20:09:12,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:12,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150525788] [2024-11-27 20:09:12,479 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:09:12,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:12,534 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-27 20:09:12,534 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 561 proven. 2180 refuted. 0 times theorem prover too weak. 13666 trivial. 0 not checked. [2024-11-27 20:09:13,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:13,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150525788] [2024-11-27 20:09:13,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150525788] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:13,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596401478] [2024-11-27 20:09:13,132 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:09:13,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:13,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:13,136 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:13,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:09:13,456 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2024-11-27 20:09:13,456 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:13,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 20:09:13,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 533 proven. 2177 refuted. 0 times theorem prover too weak. 13697 trivial. 0 not checked. [2024-11-27 20:09:13,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 537 proven. 2230 refuted. 0 times theorem prover too weak. 13640 trivial. 0 not checked. [2024-11-27 20:09:16,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596401478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:16,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:16,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 17] total 27 [2024-11-27 20:09:16,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409436951] [2024-11-27 20:09:16,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:16,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 20:09:16,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:16,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 20:09:16,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2024-11-27 20:09:16,727 INFO L87 Difference]: Start difference. First operand 83 states and 110 transitions. Second operand has 27 states, 23 states have (on average 3.0) internal successors, (69), 27 states have internal predecessors, (69), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 19 states have call successors, (27) [2024-11-27 20:09:17,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:09:17,294 INFO L93 Difference]: Finished difference Result 222 states and 332 transitions. [2024-11-27 20:09:17,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-27 20:09:17,295 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 3.0) internal successors, (69), 27 states have internal predecessors, (69), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 19 states have call successors, (27) Word has length 528 [2024-11-27 20:09:17,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:09:17,298 INFO L225 Difference]: With dead ends: 222 [2024-11-27 20:09:17,299 INFO L226 Difference]: Without dead ends: 131 [2024-11-27 20:09:17,300 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1094 GetRequests, 1044 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=617, Invalid=1363, Unknown=0, NotChecked=0, Total=1980 [2024-11-27 20:09:17,301 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:09:17,301 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 111 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:09:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-27 20:09:17,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2024-11-27 20:09:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 74 states have (on average 1.054054054054054) internal successors, (78), 70 states have internal predecessors, (78), 18 states have call successors, (18), 15 states have call predecessors, (18), 10 states have return successors, (46), 17 states have call predecessors, (46), 18 states have call successors, (46) [2024-11-27 20:09:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 142 transitions. [2024-11-27 20:09:17,316 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 142 transitions. Word has length 528 [2024-11-27 20:09:17,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:09:17,317 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 142 transitions. [2024-11-27 20:09:17,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 3.0) internal successors, (69), 27 states have internal predecessors, (69), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 19 states have call successors, (27) [2024-11-27 20:09:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 142 transitions. [2024-11-27 20:09:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 883 [2024-11-27 20:09:17,326 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:09:17,326 INFO L218 NwaCegarLoop]: trace histogram [129, 129, 104, 64, 64, 64, 64, 64, 64, 64, 40, 25, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:17,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:17,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 20:09:17,531 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:09:17,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:17,531 INFO L85 PathProgramCache]: Analyzing trace with hash -659089756, now seen corresponding path program 13 times [2024-11-27 20:09:17,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:17,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120079849] [2024-11-27 20:09:17,532 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:09:17,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 46444 backedges. 1184 proven. 5453 refuted. 0 times theorem prover too weak. 39807 trivial. 0 not checked. [2024-11-27 20:09:19,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:19,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120079849] [2024-11-27 20:09:19,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120079849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:19,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384300565] [2024-11-27 20:09:19,478 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:09:19,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:19,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:19,480 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:19,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:09:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:19,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 1978 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 20:09:19,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 46444 backedges. 667 proven. 5376 refuted. 0 times theorem prover too weak. 40401 trivial. 0 not checked. [2024-11-27 20:09:20,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 46444 backedges. 667 proven. 5476 refuted. 0 times theorem prover too weak. 40301 trivial. 0 not checked. [2024-11-27 20:09:26,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384300565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:26,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:26,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 21] total 33 [2024-11-27 20:09:26,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917276948] [2024-11-27 20:09:26,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:26,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-27 20:09:26,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:26,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-27 20:09:26,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2024-11-27 20:09:26,636 INFO L87 Difference]: Start difference. First operand 103 states and 142 transitions. Second operand has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 33 states have internal predecessors, (97), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 18 states have call predecessors, (45), 28 states have call successors, (45) [2024-11-27 20:09:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:09:27,796 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2024-11-27 20:09:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-27 20:09:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 33 states have internal predecessors, (97), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 18 states have call predecessors, (45), 28 states have call successors, (45) Word has length 882 [2024-11-27 20:09:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:09:27,800 INFO L225 Difference]: With dead ends: 273 [2024-11-27 20:09:27,800 INFO L226 Difference]: Without dead ends: 175 [2024-11-27 20:09:27,803 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1825 GetRequests, 1743 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1263, Invalid=4287, Unknown=0, NotChecked=0, Total=5550 [2024-11-27 20:09:27,804 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 230 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:09:27,804 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 276 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 20:09:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-27 20:09:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 142. [2024-11-27 20:09:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 99 states have internal predecessors, (105), 28 states have call successors, (28), 23 states have call predecessors, (28), 11 states have return successors, (81), 19 states have call predecessors, (81), 28 states have call successors, (81) [2024-11-27 20:09:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 214 transitions. [2024-11-27 20:09:27,821 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 214 transitions. Word has length 882 [2024-11-27 20:09:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:09:27,822 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 214 transitions. [2024-11-27 20:09:27,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 33 states have internal predecessors, (97), 28 states have call successors, (32), 1 states have call predecessors, (32), 16 states have return successors, (45), 18 states have call predecessors, (45), 28 states have call successors, (45) [2024-11-27 20:09:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 214 transitions. [2024-11-27 20:09:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1496 [2024-11-27 20:09:27,839 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:09:27,840 INFO L218 NwaCegarLoop]: trace histogram [219, 219, 177, 109, 109, 109, 109, 109, 109, 109, 68, 42, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:27,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:09:28,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 20:09:28,040 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:09:28,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:28,041 INFO L85 PathProgramCache]: Analyzing trace with hash 15092921, now seen corresponding path program 14 times [2024-11-27 20:09:28,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:28,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904925061] [2024-11-27 20:09:28,041 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:28,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:28,426 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:09:28,426 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 134604 backedges. 1269 proven. 10469 refuted. 0 times theorem prover too weak. 122866 trivial. 0 not checked. [2024-11-27 20:09:31,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:31,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904925061] [2024-11-27 20:09:31,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904925061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:31,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84628614] [2024-11-27 20:09:31,932 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:31,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:31,935 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:31,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:09:32,689 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:09:32,690 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:32,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 3339 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-27 20:09:32,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 134604 backedges. 1269 proven. 10469 refuted. 0 times theorem prover too weak. 122866 trivial. 0 not checked. [2024-11-27 20:09:32,913 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 134604 backedges. 1269 proven. 10595 refuted. 0 times theorem prover too weak. 122740 trivial. 0 not checked. [2024-11-27 20:09:42,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84628614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:42,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:42,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2024-11-27 20:09:42,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270759264] [2024-11-27 20:09:42,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:42,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 20:09:42,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:42,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 20:09:42,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2024-11-27 20:09:42,190 INFO L87 Difference]: Start difference. First operand 142 states and 214 transitions. Second operand has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2024-11-27 20:09:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:09:42,588 INFO L93 Difference]: Finished difference Result 151 states and 236 transitions. [2024-11-27 20:09:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:09:42,589 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) Word has length 1495 [2024-11-27 20:09:42,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:09:42,595 INFO L225 Difference]: With dead ends: 151 [2024-11-27 20:09:42,595 INFO L226 Difference]: Without dead ends: 147 [2024-11-27 20:09:42,596 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3020 GetRequests, 2978 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=356, Invalid=766, Unknown=0, NotChecked=0, Total=1122 [2024-11-27 20:09:42,597 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 198 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:09:42,597 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 113 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:09:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-27 20:09:42,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-27 20:09:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 102 states have internal predecessors, (108), 29 states have call successors, (29), 23 states have call predecessors, (29), 12 states have return successors, (93), 21 states have call predecessors, (93), 29 states have call successors, (93) [2024-11-27 20:09:42,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 230 transitions. [2024-11-27 20:09:42,619 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 230 transitions. Word has length 1495 [2024-11-27 20:09:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:09:42,621 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 230 transitions. [2024-11-27 20:09:42,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 25 states have internal predecessors, (76), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2024-11-27 20:09:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 230 transitions. [2024-11-27 20:09:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2422 [2024-11-27 20:09:42,668 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:09:42,669 INFO L218 NwaCegarLoop]: trace histogram [355, 355, 287, 177, 177, 177, 177, 177, 177, 177, 110, 68, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:42,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 20:09:42,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 20:09:42,870 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:09:42,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:42,871 INFO L85 PathProgramCache]: Analyzing trace with hash -664299511, now seen corresponding path program 15 times [2024-11-27 20:09:42,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:42,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441130693] [2024-11-27 20:09:42,871 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:09:42,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:43,061 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2024-11-27 20:09:43,062 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 354685 backedges. 2177 proven. 19136 refuted. 0 times theorem prover too weak. 333372 trivial. 0 not checked. [2024-11-27 20:09:43,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:43,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441130693] [2024-11-27 20:09:43,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441130693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:43,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59025532] [2024-11-27 20:09:43,754 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:09:43,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:43,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:43,756 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:43,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 20:09:44,354 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2024-11-27 20:09:44,354 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:44,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-27 20:09:44,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 354685 backedges. 2177 proven. 19136 refuted. 0 times theorem prover too weak. 333372 trivial. 0 not checked. [2024-11-27 20:09:44,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 354685 backedges. 2177 proven. 19291 refuted. 0 times theorem prover too weak. 333217 trivial. 0 not checked. [2024-11-27 20:09:59,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59025532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:59,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:59,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 27 [2024-11-27 20:09:59,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425337247] [2024-11-27 20:09:59,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:59,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 20:09:59,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:59,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 20:09:59,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2024-11-27 20:09:59,425 INFO L87 Difference]: Start difference. First operand 147 states and 230 transitions. Second operand has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2024-11-27 20:09:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:09:59,911 INFO L93 Difference]: Finished difference Result 156 states and 254 transitions. [2024-11-27 20:09:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 20:09:59,912 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) Word has length 2421 [2024-11-27 20:09:59,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:09:59,918 INFO L225 Difference]: With dead ends: 156 [2024-11-27 20:09:59,918 INFO L226 Difference]: Without dead ends: 152 [2024-11-27 20:09:59,919 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4875 GetRequests, 4829 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=424, Invalid=908, Unknown=0, NotChecked=0, Total=1332 [2024-11-27 20:09:59,920 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 231 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:09:59,921 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 131 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:09:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-27 20:09:59,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2024-11-27 20:09:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 105 states have internal predecessors, (111), 30 states have call successors, (30), 23 states have call predecessors, (30), 13 states have return successors, (107), 23 states have call predecessors, (107), 30 states have call successors, (107) [2024-11-27 20:09:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 248 transitions. [2024-11-27 20:09:59,944 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 248 transitions. Word has length 2421 [2024-11-27 20:09:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:09:59,945 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 248 transitions. [2024-11-27 20:09:59,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.28) internal successors, (82), 27 states have internal predecessors, (82), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2024-11-27 20:09:59,946 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 248 transitions. [2024-11-27 20:10:00,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4846 [2024-11-27 20:10:00,135 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:10:00,136 INFO L218 NwaCegarLoop]: trace histogram [711, 711, 575, 355, 355, 355, 355, 355, 355, 355, 220, 136, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:00,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 20:10:00,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 20:10:00,337 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:10:00,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:00,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1422958615, now seen corresponding path program 16 times [2024-11-27 20:10:00,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:00,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304246584] [2024-11-27 20:10:00,339 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:10:00,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:02,484 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:10:02,485 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1425985 backedges. 10841 proven. 67714 refuted. 0 times theorem prover too weak. 1347430 trivial. 0 not checked. [2024-11-27 20:10:28,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:28,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304246584] [2024-11-27 20:10:28,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304246584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:28,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852483613] [2024-11-27 20:10:28,729 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:10:28,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:28,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:28,732 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:28,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 20:10:30,423 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:10:30,423 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:30,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 8620 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-27 20:10:30,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1425985 backedges. 616878 proven. 14093 refuted. 0 times theorem prover too weak. 795014 trivial. 0 not checked. [2024-11-27 20:10:30,862 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1425985 backedges. 10841 proven. 67906 refuted. 0 times theorem prover too weak. 1347238 trivial. 0 not checked. [2024-11-27 20:10:58,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852483613] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:10:58,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:10:58,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 39] total 41 [2024-11-27 20:10:58,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793444169] [2024-11-27 20:10:58,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:10:58,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-27 20:10:58,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:10:58,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-27 20:10:58,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2024-11-27 20:10:58,236 INFO L87 Difference]: Start difference. First operand 152 states and 248 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 38 states have call successors, (43), 2 states have call predecessors, (43), 20 states have return successors, (59), 20 states have call predecessors, (59), 38 states have call successors, (59) [2024-11-27 20:10:59,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:10:59,283 INFO L93 Difference]: Finished difference Result 343 states and 727 transitions. [2024-11-27 20:10:59,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-27 20:10:59,284 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 38 states have call successors, (43), 2 states have call predecessors, (43), 20 states have return successors, (59), 20 states have call predecessors, (59), 38 states have call successors, (59) Word has length 4845 [2024-11-27 20:10:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:10:59,289 INFO L225 Difference]: With dead ends: 343 [2024-11-27 20:10:59,289 INFO L226 Difference]: Without dead ends: 202 [2024-11-27 20:10:59,292 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9768 GetRequests, 9669 SyntacticMatches, 19 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1563, Invalid=5079, Unknown=0, NotChecked=0, Total=6642 [2024-11-27 20:10:59,294 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 479 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:10:59,294 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 268 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 20:10:59,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-27 20:10:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 165. [2024-11-27 20:10:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 117 states have (on average 1.017094017094017) internal successors, (119), 115 states have internal predecessors, (119), 34 states have call successors, (34), 26 states have call predecessors, (34), 13 states have return successors, (112), 23 states have call predecessors, (112), 34 states have call successors, (112) [2024-11-27 20:10:59,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 265 transitions. [2024-11-27 20:10:59,320 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 265 transitions. Word has length 4845 [2024-11-27 20:10:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:10:59,321 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 265 transitions. [2024-11-27 20:10:59,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 38 states have call successors, (43), 2 states have call predecessors, (43), 20 states have return successors, (59), 20 states have call predecessors, (59), 38 states have call successors, (59) [2024-11-27 20:10:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 265 transitions. [2024-11-27 20:10:59,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5064 [2024-11-27 20:10:59,458 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:10:59,459 INFO L218 NwaCegarLoop]: trace histogram [743, 743, 601, 371, 371, 371, 371, 371, 371, 371, 230, 142, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:59,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 20:10:59,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:59,660 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:10:59,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:59,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1334497617, now seen corresponding path program 17 times [2024-11-27 20:10:59,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:59,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474800001] [2024-11-27 20:10:59,661 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:10:59,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:11:00,568 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 205 check-sat command(s) [2024-11-27 20:11:00,568 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1557452 backedges. 24062 proven. 44996 refuted. 0 times theorem prover too weak. 1488394 trivial. 0 not checked. [2024-11-27 20:11:05,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:11:05,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474800001] [2024-11-27 20:11:05,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474800001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:11:05,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494875655] [2024-11-27 20:11:05,136 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:11:05,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:05,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:05,138 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:05,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 20:11:07,330 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 205 check-sat command(s) [2024-11-27 20:11:07,331 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:07,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 3442 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-27 20:11:07,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1557452 backedges. 790475 proven. 7462 refuted. 0 times theorem prover too weak. 759515 trivial. 0 not checked. [2024-11-27 20:11:07,913 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:11:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1557452 backedges. 24717 proven. 47203 refuted. 0 times theorem prover too weak. 1485532 trivial. 0 not checked. [2024-11-27 20:11:36,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494875655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:11:36,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:11:36,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 35] total 42 [2024-11-27 20:11:36,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854027670] [2024-11-27 20:11:36,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:11:36,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-27 20:11:36,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:11:36,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-27 20:11:36,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1408, Unknown=0, NotChecked=0, Total=1722 [2024-11-27 20:11:36,555 INFO L87 Difference]: Start difference. First operand 165 states and 265 transitions. Second operand has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 36 states have call successors, (41), 2 states have call predecessors, (41), 18 states have return successors, (56), 19 states have call predecessors, (56), 36 states have call successors, (56) [2024-11-27 20:11:37,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:11:37,564 INFO L93 Difference]: Finished difference Result 337 states and 589 transitions. [2024-11-27 20:11:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-27 20:11:37,565 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 36 states have call successors, (41), 2 states have call predecessors, (41), 18 states have return successors, (56), 19 states have call predecessors, (56), 36 states have call successors, (56) Word has length 5063 [2024-11-27 20:11:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:11:37,572 INFO L225 Difference]: With dead ends: 337 [2024-11-27 20:11:37,573 INFO L226 Difference]: Without dead ends: 191 [2024-11-27 20:11:37,576 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10182 GetRequests, 10103 SyntacticMatches, 17 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=999, Invalid=3033, Unknown=0, NotChecked=0, Total=4032 [2024-11-27 20:11:37,576 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 143 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 20:11:37,577 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 293 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 20:11:37,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-27 20:11:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 146. [2024-11-27 20:11:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 101 states have internal predecessors, (103), 30 states have call successors, (30), 21 states have call predecessors, (30), 13 states have return successors, (104), 23 states have call predecessors, (104), 30 states have call successors, (104) [2024-11-27 20:11:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 237 transitions. [2024-11-27 20:11:37,602 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 237 transitions. Word has length 5063 [2024-11-27 20:11:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:11:37,605 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 237 transitions. [2024-11-27 20:11:37,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0952380952380953) internal successors, (130), 42 states have internal predecessors, (130), 36 states have call successors, (41), 2 states have call predecessors, (41), 18 states have return successors, (56), 19 states have call predecessors, (56), 36 states have call successors, (56) [2024-11-27 20:11:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 237 transitions. [2024-11-27 20:11:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3920 [2024-11-27 20:11:37,729 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:11:37,730 INFO L218 NwaCegarLoop]: trace histogram [575, 575, 465, 287, 287, 287, 287, 287, 287, 287, 178, 110, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:37,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-27 20:11:37,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:37,931 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:11:37,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash 506790737, now seen corresponding path program 18 times [2024-11-27 20:11:37,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:11:37,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801093041] [2024-11-27 20:11:37,933 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:11:37,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:11:38,100 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2024-11-27 20:11:38,100 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 932144 backedges. 6094 proven. 28446 refuted. 0 times theorem prover too weak. 897604 trivial. 0 not checked. [2024-11-27 20:11:39,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:11:39,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801093041] [2024-11-27 20:11:39,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801093041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:11:39,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107923672] [2024-11-27 20:11:39,006 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:11:39,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:39,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:39,008 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:39,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 20:11:40,179 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2024-11-27 20:11:40,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:40,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-27 20:11:40,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 932144 backedges. 6112 proven. 28819 refuted. 0 times theorem prover too weak. 897213 trivial. 0 not checked. [2024-11-27 20:11:40,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:12:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 932144 backedges. 6124 proven. 28962 refuted. 0 times theorem prover too weak. 897058 trivial. 0 not checked. [2024-11-27 20:12:01,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107923672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:12:01,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:12:01,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 25] total 34 [2024-11-27 20:12:01,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685499481] [2024-11-27 20:12:01,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:12:01,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-27 20:12:01,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:12:01,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-27 20:12:01,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2024-11-27 20:12:01,110 INFO L87 Difference]: Start difference. First operand 146 states and 237 transitions. Second operand has 34 states, 32 states have (on average 2.96875) internal successors, (95), 34 states have internal predecessors, (95), 26 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (39), 17 states have call predecessors, (39), 26 states have call successors, (39) [2024-11-27 20:12:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:12:01,920 INFO L93 Difference]: Finished difference Result 402 states and 739 transitions. [2024-11-27 20:12:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-27 20:12:01,921 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.96875) internal successors, (95), 34 states have internal predecessors, (95), 26 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (39), 17 states have call predecessors, (39), 26 states have call successors, (39) Word has length 3919 [2024-11-27 20:12:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:12:01,933 INFO L225 Difference]: With dead ends: 402 [2024-11-27 20:12:01,934 INFO L226 Difference]: Without dead ends: 246 [2024-11-27 20:12:01,937 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7893 GetRequests, 7821 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1260, Invalid=2646, Unknown=0, NotChecked=0, Total=3906 [2024-11-27 20:12:01,938 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 161 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:12:01,939 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 143 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:12:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-11-27 20:12:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 186. [2024-11-27 20:12:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 130 states have internal predecessors, (134), 39 states have call successors, (39), 30 states have call predecessors, (39), 14 states have return successors, (135), 25 states have call predecessors, (135), 39 states have call successors, (135) [2024-11-27 20:12:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 308 transitions. [2024-11-27 20:12:01,975 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 308 transitions. Word has length 3919 [2024-11-27 20:12:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:12:01,976 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 308 transitions. [2024-11-27 20:12:01,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.96875) internal successors, (95), 34 states have internal predecessors, (95), 26 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (39), 17 states have call predecessors, (39), 26 states have call successors, (39) [2024-11-27 20:12:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 308 transitions. [2024-11-27 20:12:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5309 [2024-11-27 20:12:02,131 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:12:02,133 INFO L218 NwaCegarLoop]: trace histogram [779, 779, 630, 389, 389, 389, 389, 389, 389, 389, 241, 149, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:12:02,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-27 20:12:02,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:12:02,334 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:12:02,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:12:02,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1001469243, now seen corresponding path program 19 times [2024-11-27 20:12:02,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:12:02,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526922913] [2024-11-27 20:12:02,336 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:12:02,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:12:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:12:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1712123 backedges. 12554 proven. 35004 refuted. 0 times theorem prover too weak. 1664565 trivial. 0 not checked. [2024-11-27 20:12:35,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:12:35,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526922913] [2024-11-27 20:12:35,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526922913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:12:35,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427011604] [2024-11-27 20:12:35,462 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:12:35,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:12:35,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:12:35,464 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:12:35,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 20:12:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:12:38,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 11805 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-27 20:12:38,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:12:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1712123 backedges. 5457 proven. 50888 refuted. 0 times theorem prover too weak. 1655778 trivial. 0 not checked. [2024-11-27 20:12:38,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:13:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1712123 backedges. 5457 proven. 51110 refuted. 0 times theorem prover too weak. 1655556 trivial. 0 not checked. [2024-11-27 20:13:09,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427011604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:13:09,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:13:09,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 29] total 31 [2024-11-27 20:13:09,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897626501] [2024-11-27 20:13:09,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:13:09,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-27 20:13:09,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:13:09,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-27 20:13:09,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2024-11-27 20:13:09,325 INFO L87 Difference]: Start difference. First operand 186 states and 308 transitions. Second operand has 31 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 31 states have internal predecessors, (95), 28 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (43), 15 states have call predecessors, (43), 28 states have call successors, (43) [2024-11-27 20:13:09,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:13:09,735 INFO L93 Difference]: Finished difference Result 208 states and 397 transitions. [2024-11-27 20:13:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 20:13:09,737 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 31 states have internal predecessors, (95), 28 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (43), 15 states have call predecessors, (43), 28 states have call successors, (43) Word has length 5308 [2024-11-27 20:13:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:13:09,749 INFO L225 Difference]: With dead ends: 208 [2024-11-27 20:13:09,749 INFO L226 Difference]: Without dead ends: 204 [2024-11-27 20:13:09,750 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10651 GetRequests, 10597 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=578, Invalid=1228, Unknown=0, NotChecked=0, Total=1806 [2024-11-27 20:13:09,752 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 112 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:13:09,752 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 125 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:13:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-27 20:13:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2024-11-27 20:13:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 139 states have internal predecessors, (143), 42 states have call successors, (42), 30 states have call predecessors, (42), 17 states have return successors, (183), 31 states have call predecessors, (183), 42 states have call successors, (183) [2024-11-27 20:13:09,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 368 transitions. [2024-11-27 20:13:09,786 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 368 transitions. Word has length 5308 [2024-11-27 20:13:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:13:09,788 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 368 transitions. [2024-11-27 20:13:09,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 31 states have internal predecessors, (95), 28 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (43), 15 states have call predecessors, (43), 28 states have call successors, (43) [2024-11-27 20:13:09,789 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 368 transitions. [2024-11-27 20:13:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25137 [2024-11-27 20:13:14,625 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:13:14,629 INFO L218 NwaCegarLoop]: trace histogram [3691, 3691, 2986, 1845, 1845, 1845, 1845, 1845, 1845, 1845, 1141, 705, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:13:14,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 20:13:14,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eea42ec1-7147-4814-9c7f-30e8df999993/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:13:14,829 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:13:14,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:13:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash -338140653, now seen corresponding path program 20 times [2024-11-27 20:13:14,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:13:14,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746498258] [2024-11-27 20:13:14,836 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:13:14,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:13:53,536 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:13:53,536 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat