./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.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_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/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_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/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_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/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 d3c61dee0c4c48de96844df391dc470a843cae078bb175116ed4a6b789669168 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:17:49,503 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:17:49,594 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 23:17:49,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:17:49,601 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:17:49,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:17:49,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:17:49,630 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:17:49,631 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:17:49,631 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:17:49,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:17:49,631 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:17:49,631 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:17:49,632 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:17:49,632 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:17:49,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:17:49,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:17:49,632 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:17:49,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:17:49,633 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:17:49,633 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:17:49,633 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:17:49,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:17:49,634 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:17:49,634 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:17:49,634 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:17:49,634 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:17:49,634 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:17:49,635 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:17:49,635 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:17:49,635 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:17:49,635 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:17:49,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:17:49,635 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:17:49,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:17:49,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:17:49,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:17:49,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:17:49,636 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:17:49,636 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:17:49,637 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:17:49,637 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:17:49,637 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:17:49,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:17:49,637 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:17:49,637 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:17:49,637 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:17:49,637 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:17:49,637 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_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/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 -> d3c61dee0c4c48de96844df391dc470a843cae078bb175116ed4a6b789669168 [2024-11-27 23:17:50,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:17:50,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:17:50,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:17:50,037 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:17:50,037 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:17:50,039 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2024-11-27 23:17:53,462 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/data/c976d15b8/505832834ec64f9a84190fd20387d243/FLAG29751dc26 [2024-11-27 23:17:53,866 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:17:53,867 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2024-11-27 23:17:53,878 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/data/c976d15b8/505832834ec64f9a84190fd20387d243/FLAG29751dc26 [2024-11-27 23:17:53,897 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/data/c976d15b8/505832834ec64f9a84190fd20387d243 [2024-11-27 23:17:53,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:17:53,903 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:17:53,904 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:17:53,904 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:17:53,910 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:17:53,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:17:53" (1/1) ... [2024-11-27 23:17:53,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@758ba9c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:53, skipping insertion in model container [2024-11-27 23:17:53,912 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:17:53" (1/1) ... [2024-11-27 23:17:53,931 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:17:54,127 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_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c[588,601] [2024-11-27 23:17:54,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:17:54,182 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:17:54,194 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_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c[588,601] [2024-11-27 23:17:54,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:17:54,234 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:17:54,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54 WrapperNode [2024-11-27 23:17:54,235 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:17:54,236 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:17:54,236 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:17:54,236 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:17:54,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,252 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,272 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2024-11-27 23:17:54,272 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:17:54,273 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:17:54,273 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:17:54,273 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:17:54,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,285 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,298 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 23:17:54,299 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,299 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,302 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,302 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,306 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,307 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,308 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,309 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:17:54,310 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:17:54,310 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:17:54,310 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:17:54,311 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (1/1) ... [2024-11-27 23:17:54,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:17:54,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:54,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:17:54,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:17:54,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:17:54,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:17:54,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:17:54,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:17:54,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 23:17:54,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 23:17:54,469 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:17:54,471 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:17:54,676 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-27 23:17:54,676 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:17:54,688 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:17:54,689 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-27 23:17:54,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:17:54 BoogieIcfgContainer [2024-11-27 23:17:54,689 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:17:54,692 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:17:54,692 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:17:54,699 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:17:54,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:17:53" (1/3) ... [2024-11-27 23:17:54,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485fd5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:17:54, skipping insertion in model container [2024-11-27 23:17:54,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:17:54" (2/3) ... [2024-11-27 23:17:54,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485fd5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:17:54, skipping insertion in model container [2024-11-27 23:17:54,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:17:54" (3/3) ... [2024-11-27 23:17:54,702 INFO L128 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound20.c [2024-11-27 23:17:54,721 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:17:54,723 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG cohencu-ll_valuebound20.c that has 2 procedures, 26 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-27 23:17:54,785 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:17:54,801 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;@9528cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:17:54,802 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 23:17:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-27 23:17:54,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-27 23:17:54,815 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:54,816 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:54,817 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:54,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:54,824 INFO L85 PathProgramCache]: Analyzing trace with hash 120600286, now seen corresponding path program 1 times [2024-11-27 23:17:54,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:54,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629123872] [2024-11-27 23:17:54,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:54,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:55,031 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 23:17:55,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:55,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629123872] [2024-11-27 23:17:55,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629123872] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:55,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:55,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:17:55,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217427489] [2024-11-27 23:17:55,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:55,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 23:17:55,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:55,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 23:17:55,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 23:17:55,077 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:55,112 INFO L93 Difference]: Finished difference Result 49 states and 87 transitions. [2024-11-27 23:17:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 23:17:55,115 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-27 23:17:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:55,124 INFO L225 Difference]: With dead ends: 49 [2024-11-27 23:17:55,124 INFO L226 Difference]: Without dead ends: 22 [2024-11-27 23:17:55,129 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 23:17:55,135 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:55,136 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:17:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-27 23:17:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-27 23:17:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:17:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2024-11-27 23:17:55,195 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2024-11-27 23:17:55,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:55,196 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2024-11-27 23:17:55,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2024-11-27 23:17:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-27 23:17:55,198 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:55,198 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:55,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:17:55,199 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:55,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:55,202 INFO L85 PathProgramCache]: Analyzing trace with hash 177858588, now seen corresponding path program 1 times [2024-11-27 23:17:55,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:55,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643047573] [2024-11-27 23:17:55,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:55,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:55,603 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 23:17:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:55,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643047573] [2024-11-27 23:17:55,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643047573] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:55,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:55,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:17:55,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022614994] [2024-11-27 23:17:55,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:55,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:17:55,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:55,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:17:55,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:17:55,607 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:55,779 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2024-11-27 23:17:55,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:17:55,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-27 23:17:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:55,782 INFO L225 Difference]: With dead ends: 28 [2024-11-27 23:17:55,782 INFO L226 Difference]: Without dead ends: 26 [2024-11-27 23:17:55,783 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:17:55,784 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:55,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:55,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-27 23:17:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-27 23:17:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 23:17:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2024-11-27 23:17:55,812 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2024-11-27 23:17:55,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:55,812 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2024-11-27 23:17:55,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:17:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2024-11-27 23:17:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-27 23:17:55,813 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:55,813 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:55,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:17:55,816 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:55,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:55,818 INFO L85 PathProgramCache]: Analyzing trace with hash -718653970, now seen corresponding path program 1 times [2024-11-27 23:17:55,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:55,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475732792] [2024-11-27 23:17:55,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:55,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:17:55,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297969791] [2024-11-27 23:17:55,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:55,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:55,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:55,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:55,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:17:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:55,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:17:55,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:17:56,025 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:17:56,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:56,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475732792] [2024-11-27 23:17:56,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:17:56,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297969791] [2024-11-27 23:17:56,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297969791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:56,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:56,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:17:56,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048482516] [2024-11-27 23:17:56,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:56,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:17:56,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:56,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:17:56,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:17:56,029 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:17:56,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:56,137 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2024-11-27 23:17:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:17:56,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-27 23:17:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:56,139 INFO L225 Difference]: With dead ends: 44 [2024-11-27 23:17:56,139 INFO L226 Difference]: Without dead ends: 42 [2024-11-27 23:17:56,139 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:17:56,140 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:56,141 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:56,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-27 23:17:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2024-11-27 23:17:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 17 states have internal predecessors, (17), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-27 23:17:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-11-27 23:17:56,158 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 13 [2024-11-27 23:17:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:56,158 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-11-27 23:17:56,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:17:56,159 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-11-27 23:17:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-27 23:17:56,159 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:56,159 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:56,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 23:17:56,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:56,360 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:56,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:56,361 INFO L85 PathProgramCache]: Analyzing trace with hash -264711396, now seen corresponding path program 1 times [2024-11-27 23:17:56,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:56,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628805420] [2024-11-27 23:17:56,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:56,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:17:56,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282969071] [2024-11-27 23:17:56,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:56,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:56,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:56,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:56,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:17:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:56,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 23:17:56,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 23:17:56,565 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:17:56,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:56,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628805420] [2024-11-27 23:17:56,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:17:56,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282969071] [2024-11-27 23:17:56,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282969071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:56,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:56,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:17:56,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040800045] [2024-11-27 23:17:56,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:56,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:17:56,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:56,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:17:56,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:17:56,569 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:17:56,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:56,686 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2024-11-27 23:17:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:17:56,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-11-27 23:17:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:56,688 INFO L225 Difference]: With dead ends: 48 [2024-11-27 23:17:56,688 INFO L226 Difference]: Without dead ends: 46 [2024-11-27 23:17:56,689 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:17:56,690 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:56,690 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-27 23:17:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2024-11-27 23:17:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-27 23:17:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2024-11-27 23:17:56,709 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 18 [2024-11-27 23:17:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:56,710 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2024-11-27 23:17:56,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:17:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2024-11-27 23:17:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 23:17:56,711 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:56,711 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:56,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 23:17:56,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:56,915 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:56,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:56,916 INFO L85 PathProgramCache]: Analyzing trace with hash -983541138, now seen corresponding path program 1 times [2024-11-27 23:17:56,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:56,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799627885] [2024-11-27 23:17:56,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:56,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:17:56,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406691609] [2024-11-27 23:17:56,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:56,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:56,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:56,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:56,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:17:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:57,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 23:17:57,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 23:17:57,122 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:17:57,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:57,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799627885] [2024-11-27 23:17:57,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:17:57,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406691609] [2024-11-27 23:17:57,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406691609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:17:57,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:17:57,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:17:57,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34758481] [2024-11-27 23:17:57,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:17:57,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:17:57,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:57,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:17:57,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:17:57,125 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:17:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:57,263 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2024-11-27 23:17:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:17:57,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-11-27 23:17:57,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:57,265 INFO L225 Difference]: With dead ends: 56 [2024-11-27 23:17:57,265 INFO L226 Difference]: Without dead ends: 44 [2024-11-27 23:17:57,265 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:17:57,266 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:57,266 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:17:57,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-27 23:17:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-27 23:17:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-27 23:17:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2024-11-27 23:17:57,279 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 23 [2024-11-27 23:17:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:57,279 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2024-11-27 23:17:57,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:17:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2024-11-27 23:17:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-27 23:17:57,280 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:57,280 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:57,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 23:17:57,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:57,481 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:57,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:57,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1309815239, now seen corresponding path program 1 times [2024-11-27 23:17:57,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:57,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531216014] [2024-11-27 23:17:57,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:57,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:17:57,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562003658] [2024-11-27 23:17:57,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:17:57,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:57,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:57,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:57,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:17:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:17:57,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 23:17:57,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-27 23:17:57,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:17:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-27 23:17:58,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:58,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531216014] [2024-11-27 23:17:58,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:17:58,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562003658] [2024-11-27 23:17:58,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562003658] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:17:58,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:17:58,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-27 23:17:58,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146495154] [2024-11-27 23:17:58,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:17:58,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 23:17:58,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:58,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 23:17:58,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-27 23:17:58,071 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-27 23:17:58,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:58,502 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2024-11-27 23:17:58,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:17:58,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 39 [2024-11-27 23:17:58,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:58,504 INFO L225 Difference]: With dead ends: 66 [2024-11-27 23:17:58,504 INFO L226 Difference]: Without dead ends: 64 [2024-11-27 23:17:58,505 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-27 23:17:58,506 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:58,506 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 123 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:17:58,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-27 23:17:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2024-11-27 23:17:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-27 23:17:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2024-11-27 23:17:58,534 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 39 [2024-11-27 23:17:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:17:58,534 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2024-11-27 23:17:58,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-27 23:17:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2024-11-27 23:17:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-27 23:17:58,535 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:17:58,535 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:17:58,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 23:17:58,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:58,740 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:17:58,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:17:58,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1978642865, now seen corresponding path program 2 times [2024-11-27 23:17:58,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:17:58,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580119690] [2024-11-27 23:17:58,741 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:17:58,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:17:58,820 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:17:58,820 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:17:58,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392449530] [2024-11-27 23:17:58,827 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:17:58,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:17:58,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:17:58,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:17:58,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:17:58,909 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:17:58,909 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:17:58,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-27 23:17:58,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:17:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-27 23:17:59,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:17:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-27 23:17:59,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:17:59,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580119690] [2024-11-27 23:17:59,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:17:59,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392449530] [2024-11-27 23:17:59,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392449530] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:17:59,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:17:59,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2024-11-27 23:17:59,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670160968] [2024-11-27 23:17:59,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:17:59,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 23:17:59,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:17:59,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 23:17:59,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:17:59,533 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 14 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-27 23:17:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:17:59,981 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2024-11-27 23:17:59,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:17:59,982 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 44 [2024-11-27 23:17:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:17:59,984 INFO L225 Difference]: With dead ends: 79 [2024-11-27 23:17:59,985 INFO L226 Difference]: Without dead ends: 74 [2024-11-27 23:17:59,985 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:17:59,986 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:17:59,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:17:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-27 23:18:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2024-11-27 23:18:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-27 23:18:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2024-11-27 23:18:00,048 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 44 [2024-11-27 23:18:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:00,048 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2024-11-27 23:18:00,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-27 23:18:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2024-11-27 23:18:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-27 23:18:00,050 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:00,050 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:00,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 23:18:00,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 23:18:00,251 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:18:00,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash 541997392, now seen corresponding path program 1 times [2024-11-27 23:18:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:00,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39924109] [2024-11-27 23:18:00,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:18:00,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541859473] [2024-11-27 23:18:00,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:00,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:00,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:00,291 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:00,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:18:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:00,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 23:18:00,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-27 23:18:00,655 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-27 23:18:00,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:00,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39924109] [2024-11-27 23:18:00,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:18:00,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541859473] [2024-11-27 23:18:00,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541859473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:00,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:18:00,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-27 23:18:00,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344697144] [2024-11-27 23:18:00,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:00,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:18:00,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:00,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:18:00,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:18:00,950 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2024-11-27 23:18:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:01,383 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2024-11-27 23:18:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:18:01,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 65 [2024-11-27 23:18:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:01,386 INFO L225 Difference]: With dead ends: 99 [2024-11-27 23:18:01,386 INFO L226 Difference]: Without dead ends: 97 [2024-11-27 23:18:01,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:18:01,389 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:01,389 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 192 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:18:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-27 23:18:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2024-11-27 23:18:01,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 51 states have internal predecessors, (52), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-27 23:18:01,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2024-11-27 23:18:01,452 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 65 [2024-11-27 23:18:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:01,452 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2024-11-27 23:18:01,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2024-11-27 23:18:01,452 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2024-11-27 23:18:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-27 23:18:01,457 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:01,457 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:01,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 23:18:01,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:01,662 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:18:01,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:01,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1041558598, now seen corresponding path program 1 times [2024-11-27 23:18:01,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:01,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114792982] [2024-11-27 23:18:01,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:01,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:18:01,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076330058] [2024-11-27 23:18:01,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:18:01,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:01,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:01,698 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:01,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:18:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:18:01,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 23:18:01,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-27 23:18:02,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-27 23:18:02,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:02,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114792982] [2024-11-27 23:18:02,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:18:02,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076330058] [2024-11-27 23:18:02,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076330058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:02,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:18:02,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-27 23:18:02,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221350449] [2024-11-27 23:18:02,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:02,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:18:02,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:02,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:18:02,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:18:02,314 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-11-27 23:18:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:18:02,906 INFO L93 Difference]: Finished difference Result 119 states and 150 transitions. [2024-11-27 23:18:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:18:02,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 70 [2024-11-27 23:18:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:18:02,909 INFO L225 Difference]: With dead ends: 119 [2024-11-27 23:18:02,909 INFO L226 Difference]: Without dead ends: 110 [2024-11-27 23:18:02,910 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-27 23:18:02,911 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:18:02,911 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 164 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:18:02,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-27 23:18:02,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2024-11-27 23:18:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 55 states have internal predecessors, (56), 36 states have call successors, (36), 14 states have call predecessors, (36), 14 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-27 23:18:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2024-11-27 23:18:02,967 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 70 [2024-11-27 23:18:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:18:02,968 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2024-11-27 23:18:02,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-11-27 23:18:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2024-11-27 23:18:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-27 23:18:02,970 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:18:02,970 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-27 23:18:02,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 23:18:03,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:03,175 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:18:03,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:18:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1836523580, now seen corresponding path program 3 times [2024-11-27 23:18:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:18:03,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575922102] [2024-11-27 23:18:03,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:03,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:18:03,291 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-27 23:18:03,292 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:18:03,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591913965] [2024-11-27 23:18:03,300 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:18:03,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:18:03,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:18:03,307 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:18:03,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:18:03,388 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:18:03,388 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:18:03,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-27 23:18:03,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:18:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 116 proven. 9 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2024-11-27 23:18:11,699 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:18:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 116 proven. 9 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2024-11-27 23:18:26,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:18:26,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575922102] [2024-11-27 23:18:26,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:18:26,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591913965] [2024-11-27 23:18:26,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591913965] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:18:26,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:18:26,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-27 23:18:26,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529116481] [2024-11-27 23:18:26,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:18:26,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:18:26,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:18:26,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:18:26,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:18:26,624 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 15 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-27 23:18:30,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:18:34,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:18:38,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:18:42,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:18:46,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:18:50,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:18:54,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:18:58,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:00,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:04,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:06,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:08,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:12,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:16,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:20,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:24,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:28,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:32,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:36,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:40,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:19:41,354 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2024-11-27 23:19:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:19:41,355 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 75 [2024-11-27 23:19:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:19:41,356 INFO L225 Difference]: With dead ends: 110 [2024-11-27 23:19:41,356 INFO L226 Difference]: Without dead ends: 108 [2024-11-27 23:19:41,357 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-11-27 23:19:41,358 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 44 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:19:41,358 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 143 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 123 Invalid, 16 Unknown, 0 Unchecked, 74.6s Time] [2024-11-27 23:19:41,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-27 23:19:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2024-11-27 23:19:41,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 58 states have internal predecessors, (59), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-27 23:19:41,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2024-11-27 23:19:41,429 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 75 [2024-11-27 23:19:41,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:19:41,430 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2024-11-27 23:19:41,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-27 23:19:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2024-11-27 23:19:41,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-27 23:19:41,432 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:19:41,432 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:19:41,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 23:19:41,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:41,637 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:19:41,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:19:41,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1571120549, now seen corresponding path program 1 times [2024-11-27 23:19:41,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:19:41,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031244204] [2024-11-27 23:19:41,638 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:41,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:19:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 23:19:41,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953993313] [2024-11-27 23:19:41,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:19:41,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:19:41,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:19:41,694 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:19:41,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:19:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:19:41,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-27 23:19:41,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:19:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 35 proven. 70 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-27 23:19:42,076 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:19:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 35 proven. 70 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-27 23:19:45,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:19:45,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031244204] [2024-11-27 23:19:45,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:19:45,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953993313] [2024-11-27 23:19:45,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953993313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:19:45,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:19:45,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-27 23:19:45,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201310832] [2024-11-27 23:19:45,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:19:45,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 23:19:45,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:19:45,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 23:19:45,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:19:45,278 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 6 states have call predecessors, (36), 7 states have call successors, (36) [2024-11-27 23:19:53,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:19:58,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:20:05,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:20:09,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.39s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-27 23:20:09,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:20:09,952 INFO L93 Difference]: Finished difference Result 129 states and 151 transitions. [2024-11-27 23:20:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:20:09,953 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 6 states have call predecessors, (36), 7 states have call successors, (36) Word has length 101 [2024-11-27 23:20:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:20:09,955 INFO L225 Difference]: With dead ends: 129 [2024-11-27 23:20:09,955 INFO L226 Difference]: Without dead ends: 105 [2024-11-27 23:20:09,955 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-11-27 23:20:09,956 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 53 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:20:09,956 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 224 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 236 Invalid, 4 Unknown, 0 Unchecked, 17.5s Time] [2024-11-27 23:20:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-27 23:20:10,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-11-27 23:20:10,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 60 states have internal predecessors, (61), 30 states have call successors, (30), 16 states have call predecessors, (30), 16 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-27 23:20:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2024-11-27 23:20:10,010 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 101 [2024-11-27 23:20:10,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:20:10,010 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2024-11-27 23:20:10,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 6 states have call predecessors, (36), 7 states have call successors, (36) [2024-11-27 23:20:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2024-11-27 23:20:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-27 23:20:10,012 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:20:10,012 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:20:10,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 23:20:10,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:10,213 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:20:10,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:20:10,214 INFO L85 PathProgramCache]: Analyzing trace with hash -33836250, now seen corresponding path program 2 times [2024-11-27 23:20:10,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:20:10,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749936623] [2024-11-27 23:20:10,214 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:20:10,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:20:10,254 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:20:10,254 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:20:10,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812325398] [2024-11-27 23:20:10,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:20:10,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:10,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:20:10,264 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:20:10,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:20:10,346 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:20:10,346 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:10,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-27 23:20:10,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:20:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 86 proven. 52 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2024-11-27 23:20:10,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:20:10,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:20:10,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749936623] [2024-11-27 23:20:10,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:20:10,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812325398] [2024-11-27 23:20:10,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812325398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:20:10,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:20:10,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-27 23:20:10,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807227790] [2024-11-27 23:20:10,683 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-27 23:20:10,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:20:10,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:20:10,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:20:10,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:20:10,684 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-11-27 23:20:11,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:20:11,001 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2024-11-27 23:20:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 23:20:11,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 117 [2024-11-27 23:20:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:20:11,003 INFO L225 Difference]: With dead ends: 115 [2024-11-27 23:20:11,003 INFO L226 Difference]: Without dead ends: 107 [2024-11-27 23:20:11,004 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:20:11,004 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:20:11,004 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 205 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:20:11,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-27 23:20:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-11-27 23:20:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 28 states have call successors, (28), 17 states have call predecessors, (28), 17 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-27 23:20:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2024-11-27 23:20:11,058 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 117 [2024-11-27 23:20:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:20:11,058 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2024-11-27 23:20:11,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-11-27 23:20:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2024-11-27 23:20:11,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-27 23:20:11,060 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:20:11,060 INFO L218 NwaCegarLoop]: trace histogram [27, 26, 26, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:20:11,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 23:20:11,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:11,261 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:20:11,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:20:11,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1790702479, now seen corresponding path program 3 times [2024-11-27 23:20:11,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:20:11,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897348130] [2024-11-27 23:20:11,262 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:20:11,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:20:11,430 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-27 23:20:11,431 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:20:11,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052692573] [2024-11-27 23:20:11,437 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:20:11,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:11,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:20:11,441 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:20:11,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:20:11,504 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:20:11,505 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:11,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 23:20:11,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:20:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 135 proven. 16 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2024-11-27 23:20:11,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:20:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 135 proven. 16 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2024-11-27 23:20:11,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:20:11,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897348130] [2024-11-27 23:20:11,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:20:11,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052692573] [2024-11-27 23:20:11,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052692573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:20:11,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:20:11,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2024-11-27 23:20:11,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418138810] [2024-11-27 23:20:11,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:20:11,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 23:20:11,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:20:11,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 23:20:11,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:20:11,858 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-27 23:20:12,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:20:12,129 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2024-11-27 23:20:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:20:12,130 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 143 [2024-11-27 23:20:12,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:20:12,131 INFO L225 Difference]: With dead ends: 113 [2024-11-27 23:20:12,131 INFO L226 Difference]: Without dead ends: 109 [2024-11-27 23:20:12,132 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:20:12,132 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:20:12,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 128 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:20:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-27 23:20:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-27 23:20:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2024-11-27 23:20:12,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2024-11-27 23:20:12,197 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 143 [2024-11-27 23:20:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:20:12,198 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2024-11-27 23:20:12,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-27 23:20:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2024-11-27 23:20:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-27 23:20:12,200 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:20:12,201 INFO L218 NwaCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:20:12,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 23:20:12,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 23:20:12,405 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:20:12,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:20:12,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1693519161, now seen corresponding path program 2 times [2024-11-27 23:20:12,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:20:12,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040462907] [2024-11-27 23:20:12,406 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:20:12,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:20:12,492 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:20:12,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 23:20:12,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193659218] [2024-11-27 23:20:12,497 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:20:12,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:20:12,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:20:12,501 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:20:12,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:20:12,609 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:20:12,609 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:20:12,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-27 23:20:12,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:20:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 113 proven. 79 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2024-11-27 23:20:12,974 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:20:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 113 proven. 43 refuted. 0 times theorem prover too weak. 1362 trivial. 0 not checked. [2024-11-27 23:20:13,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:20:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040462907] [2024-11-27 23:20:13,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 23:20:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193659218] [2024-11-27 23:20:13,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193659218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:20:13,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:20:13,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2024-11-27 23:20:13,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364555806] [2024-11-27 23:20:13,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:20:13,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:20:13,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:20:13,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:20:13,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:20:13,505 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 10 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 10 states have call successors, (39) [2024-11-27 23:20:14,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:20:14,164 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2024-11-27 23:20:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 23:20:14,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 10 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 10 states have call successors, (39) Word has length 148 [2024-11-27 23:20:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:20:14,165 INFO L225 Difference]: With dead ends: 135 [2024-11-27 23:20:14,166 INFO L226 Difference]: Without dead ends: 0 [2024-11-27 23:20:14,167 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 276 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2024-11-27 23:20:14,167 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:20:14,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 361 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:20:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-27 23:20:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-27 23:20:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:20:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-27 23:20:14,168 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 148 [2024-11-27 23:20:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:20:14,169 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-27 23:20:14,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 10 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 10 states have call successors, (39) [2024-11-27 23:20:14,169 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-27 23:20:14,169 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-27 23:20:14,174 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-27 23:20:14,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 23:20:14,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 23:20:14,378 INFO L422 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-27 23:20:14,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-27 23:20:22,346 WARN L286 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 123 DAG size of output: 49 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:20:56,706 WARN L286 SmtUtils]: Spent 34.36s on a formula simplification. DAG size of input: 131 DAG size of output: 59 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:21:17,833 WARN L286 SmtUtils]: Spent 21.10s on a formula simplification. DAG size of input: 142 DAG size of output: 41 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:21:32,130 WARN L286 SmtUtils]: Spent 14.30s on a formula simplification. DAG size of input: 129 DAG size of output: 33 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:21:55,394 WARN L286 SmtUtils]: Spent 18.25s on a formula simplification. DAG size of input: 123 DAG size of output: 60 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:22:15,993 WARN L286 SmtUtils]: Spent 20.60s on a formula simplification. DAG size of input: 131 DAG size of output: 57 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:22:55,388 WARN L286 SmtUtils]: Spent 39.39s on a formula simplification. DAG size of input: 142 DAG size of output: 60 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:24:54,093 WARN L286 SmtUtils]: Spent 1.98m on a formula simplification. DAG size of input: 142 DAG size of output: 49 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:25:51,764 WARN L286 SmtUtils]: Spent 57.67s on a formula simplification. DAG size of input: 142 DAG size of output: 60 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:25:59,798 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 129 DAG size of output: 37 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-27 23:25:59,804 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-27 23:25:59,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:25:59 BoogieIcfgContainer [2024-11-27 23:25:59,823 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-27 23:25:59,823 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-27 23:25:59,824 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-27 23:25:59,824 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-27 23:25:59,825 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:17:54" (3/4) ... [2024-11-27 23:25:59,827 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-27 23:25:59,833 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-27 23:25:59,836 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2024-11-27 23:25:59,836 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-27 23:25:59,836 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-27 23:25:59,836 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-27 23:25:59,934 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-27 23:25:59,935 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-27 23:25:59,935 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-27 23:25:59,936 INFO L158 Benchmark]: Toolchain (without parser) took 486033.78ms. Allocated memory was 117.4MB in the beginning and 176.2MB in the end (delta: 58.7MB). Free memory was 93.5MB in the beginning and 131.3MB in the end (delta: -37.8MB). Peak memory consumption was 22.8MB. Max. memory is 16.1GB. [2024-11-27 23:25:59,937 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 117.4MB. Free memory was 74.8MB in the beginning and 74.7MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:25:59,937 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.26ms. Allocated memory is still 117.4MB. Free memory was 93.5MB in the beginning and 81.8MB in the end (delta: 11.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 23:25:59,937 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.38ms. Allocated memory is still 117.4MB. Free memory was 81.8MB in the beginning and 80.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 23:25:59,938 INFO L158 Benchmark]: Boogie Preprocessor took 36.26ms. Allocated memory is still 117.4MB. Free memory was 80.4MB in the beginning and 79.2MB in the end (delta: 1.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 23:25:59,938 INFO L158 Benchmark]: RCFGBuilder took 379.57ms. Allocated memory is still 117.4MB. Free memory was 79.2MB in the beginning and 68.0MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 23:25:59,939 INFO L158 Benchmark]: TraceAbstraction took 485130.43ms. Allocated memory was 117.4MB in the beginning and 176.2MB in the end (delta: 58.7MB). Free memory was 67.4MB in the beginning and 137.8MB in the end (delta: -70.4MB). Peak memory consumption was 74.8MB. Max. memory is 16.1GB. [2024-11-27 23:25:59,940 INFO L158 Benchmark]: Witness Printer took 111.75ms. Allocated memory is still 176.2MB. Free memory was 137.8MB in the beginning and 131.3MB in the end (delta: 6.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 23:25:59,942 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 117.4MB. Free memory was 74.8MB in the beginning and 74.7MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 331.26ms. Allocated memory is still 117.4MB. Free memory was 93.5MB in the beginning and 81.8MB in the end (delta: 11.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.38ms. Allocated memory is still 117.4MB. Free memory was 81.8MB in the beginning and 80.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 36.26ms. Allocated memory is still 117.4MB. Free memory was 80.4MB in the beginning and 79.2MB in the end (delta: 1.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 379.57ms. Allocated memory is still 117.4MB. Free memory was 79.2MB in the beginning and 68.0MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 485130.43ms. Allocated memory was 117.4MB in the beginning and 176.2MB in the end (delta: 58.7MB). Free memory was 67.4MB in the beginning and 137.8MB in the end (delta: -70.4MB). Peak memory consumption was 74.8MB. Max. memory is 16.1GB. * Witness Printer took 111.75ms. Allocated memory is still 176.2MB. Free memory was 137.8MB in the beginning and 131.3MB in the end (delta: 6.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 139.6s, OverallIterations: 14, TraceHistogramMax: 28, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 103.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 mSolverCounterUnknown, 120 SdHoareTripleChecker+Valid, 94.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 76 mSDsluCounter, 2087 SdHoareTripleChecker+Invalid, 94.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1708 mSDsCounter, 348 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2057 IncrementalHoareTripleChecker+Invalid, 2425 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 348 mSolverCounterUnsat, 379 mSDtfsCounter, 2057 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1572 GetRequests, 1413 SyntacticMatches, 4 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 22.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=13, InterpolantAutomatonStates: 116, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 14 MinimizatonAttempts, 39 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 31.2s InterpolantComputationTime, 1728 NumberOfCodeBlocks, 1569 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 1535 ConstructedInterpolants, 0 QuantifiedInterpolants, 5623 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1725 ConjunctsInSsa, 271 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 9839/10276 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((y == ((((__int128) 3 * n) + (3 * ((__int128) n * n))) + 1)) && (z == (6 + ((__int128) 6 * n)))) && ((n < (a + 1)) || (((((__int128) 2 * y) + (6 * a)) + 10) == (((__int128) a * z) + ((__int128) 2 * z))))) && ((((((__int128) 3 * n) + (3 * ((__int128) n * n))) + (((__int128) n * n) * n)) + 1) == ((__int128) x + y))) RESULT: Ultimate proved your program to be correct! [2024-11-27 23:26:00,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e685cb4d-e7ab-4f4d-a96a-5c6c1c135c15/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE