./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:07:36,026 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:07:36,134 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 23:07:36,143 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:07:36,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:07:36,187 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:07:36,189 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:07:36,189 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:07:36,190 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:07:36,190 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:07:36,191 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:07:36,192 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:07:36,192 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:07:36,192 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:07:36,193 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:07:36,193 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:07:36,194 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 23:07:36,194 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:07:36,194 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:07:36,194 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:07:36,194 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:07:36,194 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 23:07:36,194 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:07:36,195 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 23:07:36,195 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:07:36,195 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 23:07:36,195 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:07:36,195 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:07:36,195 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:07:36,195 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:07:36,196 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:07:36,197 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:07:36,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:07:36,197 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:07:36,197 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:07:36,197 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:07:36,197 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:07:36,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:07:36,198 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:07:36,198 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:07:36,198 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 23:07:36,198 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 23:07:36,198 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:07:36,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:07:36,198 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:07:36,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:07:36,199 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:07:36,199 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:07:36,199 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_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 [2024-11-23 23:07:36,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:07:36,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:07:36,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:07:36,568 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:07:36,569 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:07:36,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2024-11-23 23:07:39,653 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/data/b97b4ace3/81a501c578b849fc906e8b4187777284/FLAG4020cf9db [2024-11-23 23:07:39,962 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:07:39,963 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2024-11-23 23:07:39,974 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/data/b97b4ace3/81a501c578b849fc906e8b4187777284/FLAG4020cf9db [2024-11-23 23:07:40,003 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/data/b97b4ace3/81a501c578b849fc906e8b4187777284 [2024-11-23 23:07:40,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:07:40,008 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:07:40,010 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:07:40,010 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:07:40,016 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:07:40,018 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,021 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f7a1700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40, skipping insertion in model container [2024-11-23 23:07:40,021 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,038 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:07:40,221 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_d4ff172a-4aaf-46ed-813b-db8edd1a0960/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2024-11-23 23:07:40,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:07:40,261 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:07:40,276 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_d4ff172a-4aaf-46ed-813b-db8edd1a0960/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2024-11-23 23:07:40,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:07:40,310 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:07:40,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40 WrapperNode [2024-11-23 23:07:40,311 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:07:40,312 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:07:40,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:07:40,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:07:40,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,334 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,356 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2024-11-23 23:07:40,356 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:07:40,357 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:07:40,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:07:40,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:07:40,367 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,367 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,370 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,390 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-23 23:07:40,390 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,391 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,401 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,401 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,409 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,410 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,413 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:07:40,419 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:07:40,419 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:07:40,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:07:40,421 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (1/1) ... [2024-11-23 23:07:40,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:07:40,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:07:40,464 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:07:40,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:07:40,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:07:40,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:07:40,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:07:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-23 23:07:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:07:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:07:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:07:40,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:07:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:07:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:07:40,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-23 23:07:40,577 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:07:40,579 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:07:40,744 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-23 23:07:40,744 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:07:40,753 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:07:40,754 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-23 23:07:40,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:07:40 BoogieIcfgContainer [2024-11-23 23:07:40,754 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:07:40,757 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:07:40,757 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:07:40,763 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:07:40,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:07:40" (1/3) ... [2024-11-23 23:07:40,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ba68d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:07:40, skipping insertion in model container [2024-11-23 23:07:40,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:07:40" (2/3) ... [2024-11-23 23:07:40,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ba68d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:07:40, skipping insertion in model container [2024-11-23 23:07:40,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:07:40" (3/3) ... [2024-11-23 23:07:40,766 INFO L128 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2024-11-23 23:07:40,784 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:07:40,787 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sorting_bubblesort_2_ground.i that has 1 procedures, 26 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-23 23:07:40,865 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:07:40,881 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;@3d8c5447, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:07:40,883 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-23 23:07:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 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) [2024-11-23 23:07:40,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-23 23:07:40,898 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:07:40,899 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:07:40,900 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:07:40,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:07:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1205302859, now seen corresponding path program 1 times [2024-11-23 23:07:40,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:07:40,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203290316] [2024-11-23 23:07:40,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:07:40,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:07:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:07:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:07:41,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:07:41,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203290316] [2024-11-23 23:07:41,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203290316] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:07:41,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:07:41,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:07:41,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927327994] [2024-11-23 23:07:41,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:07:41,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:07:41,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:07:41,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:07:41,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:07:41,217 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 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) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-11-23 23:07:41,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:07:41,245 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2024-11-23 23:07:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:07:41,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) Word has length 12 [2024-11-23 23:07:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:07:41,254 INFO L225 Difference]: With dead ends: 50 [2024-11-23 23:07:41,255 INFO L226 Difference]: Without dead ends: 24 [2024-11-23 23:07:41,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:07:41,260 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:07:41,261 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:07:41,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-23 23:07:41,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-11-23 23:07:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2024-11-23 23:07:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-11-23 23:07:41,292 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 12 [2024-11-23 23:07:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:07:41,293 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-11-23 23:07:41,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-11-23 23:07:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-11-23 23:07:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-23 23:07:41,294 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:07:41,294 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:07:41,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:07:41,294 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:07:41,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:07:41,295 INFO L85 PathProgramCache]: Analyzing trace with hash -368722126, now seen corresponding path program 1 times [2024-11-23 23:07:41,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:07:41,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841200055] [2024-11-23 23:07:41,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:07:41,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:07:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:07:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:07:41,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:07:41,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841200055] [2024-11-23 23:07:41,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841200055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:07:41,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634734719] [2024-11-23 23:07:41,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:07:41,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:41,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:07:41,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:07:41,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:07:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:07:41,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-23 23:07:41,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:07:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:07:41,559 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:07:41,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634734719] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:07:41,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:07:41,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-23 23:07:41,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300454616] [2024-11-23 23:07:41,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:07:41,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:07:41,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:07:41,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:07:41,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:07:41,564 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-11-23 23:07:41,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:07:41,592 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-11-23 23:07:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:07:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) Word has length 14 [2024-11-23 23:07:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:07:41,596 INFO L225 Difference]: With dead ends: 39 [2024-11-23 23:07:41,596 INFO L226 Difference]: Without dead ends: 29 [2024-11-23 23:07:41,596 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:07:41,597 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:07:41,597 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:07:41,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-23 23:07:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-23 23:07:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2024-11-23 23:07:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-23 23:07:41,607 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 14 [2024-11-23 23:07:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:07:41,608 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-23 23:07:41,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-11-23 23:07:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-23 23:07:41,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-23 23:07:41,609 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:07:41,609 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:07:41,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 23:07:41,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:41,809 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:07:41,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:07:41,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1959168573, now seen corresponding path program 1 times [2024-11-23 23:07:41,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:07:41,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647912678] [2024-11-23 23:07:41,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:07:41,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:07:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:07:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:07:41,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:07:41,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647912678] [2024-11-23 23:07:41,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647912678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:07:41,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989287182] [2024-11-23 23:07:41,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:07:41,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:41,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:07:41,939 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:07:41,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:07:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:07:42,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-23 23:07:42,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:07:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:07:42,052 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:07:42,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989287182] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:07:42,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:07:42,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-23 23:07:42,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259535889] [2024-11-23 23:07:42,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:07:42,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:07:42,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:07:42,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:07:42,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:07:42,054 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2024-11-23 23:07:42,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:07:42,080 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-11-23 23:07:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:07:42,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) Word has length 18 [2024-11-23 23:07:42,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:07:42,081 INFO L225 Difference]: With dead ends: 57 [2024-11-23 23:07:42,082 INFO L226 Difference]: Without dead ends: 34 [2024-11-23 23:07:42,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:07:42,083 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:07:42,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:07:42,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-23 23:07:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-11-23 23:07:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 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) [2024-11-23 23:07:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-23 23:07:42,088 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2024-11-23 23:07:42,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:07:42,088 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-23 23:07:42,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2024-11-23 23:07:42,088 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-23 23:07:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-23 23:07:42,089 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:07:42,089 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:07:42,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 23:07:42,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:42,293 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:07:42,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:07:42,294 INFO L85 PathProgramCache]: Analyzing trace with hash -643840535, now seen corresponding path program 1 times [2024-11-23 23:07:42,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:07:42,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769442562] [2024-11-23 23:07:42,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:07:42,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:07:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:07:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:07:42,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:07:42,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769442562] [2024-11-23 23:07:42,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769442562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:07:42,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181606433] [2024-11-23 23:07:42,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:07:42,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:42,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:07:42,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:07:42,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:07:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:07:42,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:07:42,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:07:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:07:42,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:07:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:07:42,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181606433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:07:42,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:07:42,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-23 23:07:42,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225421278] [2024-11-23 23:07:42,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:07:42,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:07:42,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:07:42,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:07:42,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:07:42,548 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) [2024-11-23 23:07:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:07:42,600 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2024-11-23 23:07:42,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:07:42,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) Word has length 22 [2024-11-23 23:07:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:07:42,602 INFO L225 Difference]: With dead ends: 61 [2024-11-23 23:07:42,602 INFO L226 Difference]: Without dead ends: 36 [2024-11-23 23:07:42,602 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:07:42,604 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:07:42,605 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:07:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-23 23:07:42,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-23 23:07:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 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) [2024-11-23 23:07:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-23 23:07:42,614 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 22 [2024-11-23 23:07:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:07:42,614 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-23 23:07:42,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) [2024-11-23 23:07:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-23 23:07:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-23 23:07:42,615 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:07:42,615 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:07:42,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 23:07:42,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:42,822 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:07:42,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:07:42,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2029353397, now seen corresponding path program 2 times [2024-11-23 23:07:42,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:07:42,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292451159] [2024-11-23 23:07:42,824 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:07:42,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:07:42,874 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:07:42,874 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:07:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:07:42,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:07:42,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292451159] [2024-11-23 23:07:42,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292451159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:07:42,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828368678] [2024-11-23 23:07:42,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:07:42,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:42,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:07:42,978 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:07:42,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:07:43,065 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:07:43,065 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:07:43,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:07:43,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:07:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:07:43,164 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:07:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:07:43,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828368678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:07:43,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:07:43,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-23 23:07:43,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569547226] [2024-11-23 23:07:43,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:07:43,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:07:43,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:07:43,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:07:43,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:07:43,289 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 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) [2024-11-23 23:07:43,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:07:43,422 INFO L93 Difference]: Finished difference Result 85 states and 109 transitions. [2024-11-23 23:07:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 23:07:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 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) Word has length 28 [2024-11-23 23:07:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:07:43,427 INFO L225 Difference]: With dead ends: 85 [2024-11-23 23:07:43,427 INFO L226 Difference]: Without dead ends: 60 [2024-11-23 23:07:43,427 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:07:43,428 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:07:43,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 165 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:07:43,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-23 23:07:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2024-11-23 23:07:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 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) [2024-11-23 23:07:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-11-23 23:07:43,440 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 28 [2024-11-23 23:07:43,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:07:43,440 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-11-23 23:07:43,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 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) [2024-11-23 23:07:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-11-23 23:07:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-23 23:07:43,441 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:07:43,441 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:07:43,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 23:07:43,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:43,642 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:07:43,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:07:43,642 INFO L85 PathProgramCache]: Analyzing trace with hash -332299917, now seen corresponding path program 3 times [2024-11-23 23:07:43,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:07:43,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890849421] [2024-11-23 23:07:43,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:07:43,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:07:43,673 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-23 23:07:43,673 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:07:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-23 23:07:43,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:07:43,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890849421] [2024-11-23 23:07:43,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890849421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:07:43,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041080593] [2024-11-23 23:07:43,745 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:07:43,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:43,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:07:43,747 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:07:43,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:07:43,844 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-23 23:07:43,844 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:07:43,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 23:07:43,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:07:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-23 23:07:43,908 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:07:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-23 23:07:43,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041080593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:07:43,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:07:43,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-23 23:07:43,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81547384] [2024-11-23 23:07:43,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:07:43,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 23:07:43,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:07:43,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 23:07:43,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:07:43,963 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 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) [2024-11-23 23:07:44,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:07:44,030 INFO L93 Difference]: Finished difference Result 116 states and 147 transitions. [2024-11-23 23:07:44,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:07:44,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 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) Word has length 44 [2024-11-23 23:07:44,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:07:44,032 INFO L225 Difference]: With dead ends: 116 [2024-11-23 23:07:44,032 INFO L226 Difference]: Without dead ends: 86 [2024-11-23 23:07:44,032 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:07:44,033 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:07:44,034 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 47 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:07:44,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-23 23:07:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-23 23:07:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2) internal successors, (102), 85 states have internal predecessors, (102), 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) [2024-11-23 23:07:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2024-11-23 23:07:44,042 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 44 [2024-11-23 23:07:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:07:44,043 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2024-11-23 23:07:44,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 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) [2024-11-23 23:07:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2024-11-23 23:07:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-23 23:07:44,044 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:07:44,044 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:07:44,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 23:07:44,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:44,245 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:07:44,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:07:44,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1289768971, now seen corresponding path program 4 times [2024-11-23 23:07:44,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:07:44,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182496812] [2024-11-23 23:07:44,246 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:07:44,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:07:44,312 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:07:44,312 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:07:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-23 23:07:44,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:07:44,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182496812] [2024-11-23 23:07:44,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182496812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:07:44,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543063935] [2024-11-23 23:07:44,497 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:07:44,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:44,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:07:44,499 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:07:44,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:07:44,600 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:07:44,600 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:07:44,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:07:44,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:07:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-23 23:07:44,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:07:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-23 23:07:44,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543063935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:07:44,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:07:44,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-23 23:07:44,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239202589] [2024-11-23 23:07:44,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:07:44,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:07:44,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:07:44,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:07:44,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:07:44,839 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 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) [2024-11-23 23:07:44,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:07:44,968 INFO L93 Difference]: Finished difference Result 212 states and 275 transitions. [2024-11-23 23:07:44,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-23 23:07:44,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 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) Word has length 60 [2024-11-23 23:07:44,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:07:44,970 INFO L225 Difference]: With dead ends: 212 [2024-11-23 23:07:44,970 INFO L226 Difference]: Without dead ends: 150 [2024-11-23 23:07:44,970 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:07:44,971 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:07:44,971 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 90 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:07:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-23 23:07:44,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-23 23:07:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.221476510067114) internal successors, (182), 149 states have internal predecessors, (182), 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) [2024-11-23 23:07:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 182 transitions. [2024-11-23 23:07:44,984 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 182 transitions. Word has length 60 [2024-11-23 23:07:44,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:07:44,984 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 182 transitions. [2024-11-23 23:07:44,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 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) [2024-11-23 23:07:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 182 transitions. [2024-11-23 23:07:44,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-23 23:07:44,987 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:07:44,987 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:07:44,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-23 23:07:45,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:45,188 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:07:45,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:07:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1591911109, now seen corresponding path program 5 times [2024-11-23 23:07:45,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:07:45,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690458711] [2024-11-23 23:07:45,189 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:07:45,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:07:45,388 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-23 23:07:45,389 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:07:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 1 proven. 378 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-23 23:07:45,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:07:45,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690458711] [2024-11-23 23:07:45,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690458711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:07:45,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145989399] [2024-11-23 23:07:45,890 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:07:45,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:45,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:07:45,892 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:07:45,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:07:46,141 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-23 23:07:46,141 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:07:46,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:07:46,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:07:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 1 proven. 378 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-23 23:07:46,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:07:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 1 proven. 378 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-23 23:07:46,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145989399] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:07:46,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:07:46,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2024-11-23 23:07:46,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486543008] [2024-11-23 23:07:46,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:07:46,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-23 23:07:46,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:07:46,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-23 23:07:46,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2024-11-23 23:07:46,800 INFO L87 Difference]: Start difference. First operand 150 states and 182 transitions. Second operand has 32 states, 32 states have (on average 4.125) internal successors, (132), 32 states have internal predecessors, (132), 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) [2024-11-23 23:07:47,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:07:47,060 INFO L93 Difference]: Finished difference Result 404 states and 531 transitions. [2024-11-23 23:07:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-23 23:07:47,061 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.125) internal successors, (132), 32 states have internal predecessors, (132), 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) Word has length 92 [2024-11-23 23:07:47,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:07:47,064 INFO L225 Difference]: With dead ends: 404 [2024-11-23 23:07:47,064 INFO L226 Difference]: Without dead ends: 278 [2024-11-23 23:07:47,065 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2024-11-23 23:07:47,068 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:07:47,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 142 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:07:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-11-23 23:07:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2024-11-23 23:07:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.2346570397111913) internal successors, (342), 277 states have internal predecessors, (342), 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) [2024-11-23 23:07:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 342 transitions. [2024-11-23 23:07:47,108 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 342 transitions. Word has length 92 [2024-11-23 23:07:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:07:47,109 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 342 transitions. [2024-11-23 23:07:47,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.125) internal successors, (132), 32 states have internal predecessors, (132), 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) [2024-11-23 23:07:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 342 transitions. [2024-11-23 23:07:47,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-23 23:07:47,116 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:07:47,116 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:07:47,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 23:07:47,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-23 23:07:47,317 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:07:47,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:07:47,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2020264037, now seen corresponding path program 6 times [2024-11-23 23:07:47,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:07:47,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179624039] [2024-11-23 23:07:47,318 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:07:47,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:07:47,615 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2024-11-23 23:07:47,615 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:07:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-11-23 23:07:48,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:07:48,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179624039] [2024-11-23 23:07:48,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179624039] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:07:48,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723447449] [2024-11-23 23:07:48,058 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 23:07:48,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:48,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:07:48,060 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:07:48,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:07:48,404 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2024-11-23 23:07:48,405 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:07:48,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 23:07:48,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:07:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-11-23 23:07:48,506 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:07:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1871 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-11-23 23:07:48,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723447449] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:07:48,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:07:48,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-23 23:07:48,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110200819] [2024-11-23 23:07:48,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:07:48,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 23:07:48,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:07:48,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 23:07:48,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:07:48,836 INFO L87 Difference]: Start difference. First operand 278 states and 342 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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) [2024-11-23 23:07:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:07:48,958 INFO L93 Difference]: Finished difference Result 557 states and 696 transitions. [2024-11-23 23:07:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-23 23:07:48,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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) Word has length 156 [2024-11-23 23:07:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:07:48,961 INFO L225 Difference]: With dead ends: 557 [2024-11-23 23:07:48,961 INFO L226 Difference]: Without dead ends: 302 [2024-11-23 23:07:48,965 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:07:48,966 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:07:48,967 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 113 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:07:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-11-23 23:07:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2024-11-23 23:07:48,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.2159468438538206) internal successors, (366), 301 states have internal predecessors, (366), 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) [2024-11-23 23:07:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 366 transitions. [2024-11-23 23:07:49,001 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 366 transitions. Word has length 156 [2024-11-23 23:07:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:07:49,002 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 366 transitions. [2024-11-23 23:07:49,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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) [2024-11-23 23:07:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 366 transitions. [2024-11-23 23:07:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-11-23 23:07:49,009 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:07:49,009 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:07:49,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 23:07:49,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-23 23:07:49,210 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:07:49,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:07:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1841943349, now seen corresponding path program 7 times [2024-11-23 23:07:49,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:07:49,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730661693] [2024-11-23 23:07:49,211 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:07:49,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:07:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:07:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-11-23 23:07:50,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:07:50,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730661693] [2024-11-23 23:07:50,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730661693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:07:50,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094554553] [2024-11-23 23:07:50,390 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 23:07:50,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:50,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:07:50,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:07:50,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:07:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:07:50,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-23 23:07:50,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:07:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-11-23 23:07:50,684 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:07:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-11-23 23:07:51,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094554553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:07:51,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:07:51,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-23 23:07:51,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594376029] [2024-11-23 23:07:51,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:07:51,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-23 23:07:51,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:07:51,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-23 23:07:51,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-23 23:07:51,682 INFO L87 Difference]: Start difference. First operand 302 states and 366 transitions. Second operand has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 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) [2024-11-23 23:07:51,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:07:51,887 INFO L93 Difference]: Finished difference Result 605 states and 756 transitions. [2024-11-23 23:07:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-23 23:07:51,888 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 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) Word has length 180 [2024-11-23 23:07:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:07:51,890 INFO L225 Difference]: With dead ends: 605 [2024-11-23 23:07:51,890 INFO L226 Difference]: Without dead ends: 350 [2024-11-23 23:07:51,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-23 23:07:51,894 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:07:51,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:07:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2024-11-23 23:07:51,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 350. [2024-11-23 23:07:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.186246418338109) internal successors, (414), 349 states have internal predecessors, (414), 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) [2024-11-23 23:07:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 414 transitions. [2024-11-23 23:07:51,915 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 414 transitions. Word has length 180 [2024-11-23 23:07:51,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:07:51,917 INFO L471 AbstractCegarLoop]: Abstraction has 350 states and 414 transitions. [2024-11-23 23:07:51,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 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) [2024-11-23 23:07:51,917 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 414 transitions. [2024-11-23 23:07:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2024-11-23 23:07:51,920 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:07:51,920 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:07:51,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 23:07:52,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-23 23:07:52,121 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:07:52,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:07:52,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1536792789, now seen corresponding path program 8 times [2024-11-23 23:07:52,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:07:52,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779013115] [2024-11-23 23:07:52,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:07:52,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:07:52,231 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:07:52,231 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:07:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3887 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-11-23 23:07:54,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:07:54,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779013115] [2024-11-23 23:07:54,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779013115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:07:54,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413579769] [2024-11-23 23:07:54,940 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:07:54,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:54,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:07:54,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:07:54,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:07:55,177 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:07:55,178 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:07:55,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-23 23:07:55,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:07:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3887 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-11-23 23:07:55,378 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:07:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3887 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2024-11-23 23:07:58,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413579769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:07:58,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:07:58,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-11-23 23:07:58,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800365883] [2024-11-23 23:07:58,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:07:58,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-23 23:07:58,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:07:58,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-23 23:07:58,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-23 23:07:58,614 INFO L87 Difference]: Start difference. First operand 350 states and 414 transitions. Second operand has 97 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 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) [2024-11-23 23:07:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:07:59,047 INFO L93 Difference]: Finished difference Result 701 states and 876 transitions. [2024-11-23 23:07:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-23 23:07:59,048 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 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) Word has length 228 [2024-11-23 23:07:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:07:59,052 INFO L225 Difference]: With dead ends: 701 [2024-11-23 23:07:59,052 INFO L226 Difference]: Without dead ends: 446 [2024-11-23 23:07:59,055 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-23 23:07:59,056 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:07:59,056 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 179 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 23:07:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2024-11-23 23:07:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2024-11-23 23:07:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.146067415730337) internal successors, (510), 445 states have internal predecessors, (510), 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) [2024-11-23 23:07:59,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 510 transitions. [2024-11-23 23:07:59,074 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 510 transitions. Word has length 228 [2024-11-23 23:07:59,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:07:59,075 INFO L471 AbstractCegarLoop]: Abstraction has 446 states and 510 transitions. [2024-11-23 23:07:59,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.154639175257732) internal successors, (209), 97 states have internal predecessors, (209), 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) [2024-11-23 23:07:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 510 transitions. [2024-11-23 23:07:59,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2024-11-23 23:07:59,079 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:07:59,079 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:07:59,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 23:07:59,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:07:59,284 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:07:59,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:07:59,285 INFO L85 PathProgramCache]: Analyzing trace with hash -809493525, now seen corresponding path program 9 times [2024-11-23 23:07:59,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:07:59,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92413205] [2024-11-23 23:07:59,285 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:07:59,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:07:59,998 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2024-11-23 23:07:59,998 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:08:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10607 backedges. 1 proven. 1770 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-11-23 23:08:01,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:01,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92413205] [2024-11-23 23:08:01,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92413205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:08:01,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765088389] [2024-11-23 23:08:01,214 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:08:01,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:01,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:08:01,216 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:08:01,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 23:08:12,598 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2024-11-23 23:08:12,598 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:08:12,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-23 23:08:12,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:08:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10607 backedges. 1 proven. 1770 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-11-23 23:08:12,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:08:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10607 backedges. 1 proven. 1770 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-11-23 23:08:14,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765088389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:08:14,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:08:14,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2024-11-23 23:08:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528730444] [2024-11-23 23:08:14,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:08:14,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-23 23:08:14,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:14,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-23 23:08:14,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-11-23 23:08:14,255 INFO L87 Difference]: Start difference. First operand 446 states and 510 transitions. Second operand has 65 states, 65 states have (on average 4.076923076923077) internal successors, (265), 65 states have internal predecessors, (265), 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) [2024-11-23 23:08:14,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:08:14,810 INFO L93 Difference]: Finished difference Result 956 states and 1211 transitions. [2024-11-23 23:08:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-23 23:08:14,811 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 4.076923076923077) internal successors, (265), 65 states have internal predecessors, (265), 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) Word has length 324 [2024-11-23 23:08:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:08:14,815 INFO L225 Difference]: With dead ends: 956 [2024-11-23 23:08:14,815 INFO L226 Difference]: Without dead ends: 702 [2024-11-23 23:08:14,816 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-11-23 23:08:14,817 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 231 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:08:14,817 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 156 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 23:08:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2024-11-23 23:08:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2024-11-23 23:08:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 1.1840228245363766) internal successors, (830), 701 states have internal predecessors, (830), 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) [2024-11-23 23:08:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 830 transitions. [2024-11-23 23:08:14,840 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 830 transitions. Word has length 324 [2024-11-23 23:08:14,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:08:14,841 INFO L471 AbstractCegarLoop]: Abstraction has 702 states and 830 transitions. [2024-11-23 23:08:14,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 4.076923076923077) internal successors, (265), 65 states have internal predecessors, (265), 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) [2024-11-23 23:08:14,841 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 830 transitions. [2024-11-23 23:08:14,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2024-11-23 23:08:14,849 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:08:14,849 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:08:14,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 23:08:15,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:15,050 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:08:15,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:15,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1039019861, now seen corresponding path program 10 times [2024-11-23 23:08:15,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:15,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225146898] [2024-11-23 23:08:15,051 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:08:15,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:15,539 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:08:15,539 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:08:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16463 backedges. 1 proven. 7626 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-11-23 23:08:20,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:20,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225146898] [2024-11-23 23:08:20,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225146898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:08:20,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604495006] [2024-11-23 23:08:20,486 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 23:08:20,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:20,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:08:20,489 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:08:20,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 23:08:20,926 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 23:08:20,927 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:08:20,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-23 23:08:20,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:08:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16463 backedges. 1 proven. 7626 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-11-23 23:08:21,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:08:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16463 backedges. 1 proven. 7626 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-11-23 23:08:26,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604495006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:08:26,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:08:26,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 128 [2024-11-23 23:08:26,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119268324] [2024-11-23 23:08:26,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:08:26,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-11-23 23:08:26,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:26,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-11-23 23:08:26,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2024-11-23 23:08:26,557 INFO L87 Difference]: Start difference. First operand 702 states and 830 transitions. Second operand has 128 states, 128 states have (on average 4.03125) internal successors, (516), 128 states have internal predecessors, (516), 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) [2024-11-23 23:08:28,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:08:28,596 INFO L93 Difference]: Finished difference Result 1724 states and 2235 transitions. [2024-11-23 23:08:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2024-11-23 23:08:28,597 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 4.03125) internal successors, (516), 128 states have internal predecessors, (516), 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) Word has length 452 [2024-11-23 23:08:28,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:08:28,602 INFO L225 Difference]: With dead ends: 1724 [2024-11-23 23:08:28,602 INFO L226 Difference]: Without dead ends: 1214 [2024-11-23 23:08:28,606 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 841 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2024-11-23 23:08:28,607 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 524 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:08:28,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 220 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:08:28,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2024-11-23 23:08:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1214. [2024-11-23 23:08:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 1.211871393239901) internal successors, (1470), 1213 states have internal predecessors, (1470), 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) [2024-11-23 23:08:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1470 transitions. [2024-11-23 23:08:28,647 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1470 transitions. Word has length 452 [2024-11-23 23:08:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:08:28,648 INFO L471 AbstractCegarLoop]: Abstraction has 1214 states and 1470 transitions. [2024-11-23 23:08:28,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 4.03125) internal successors, (516), 128 states have internal predecessors, (516), 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) [2024-11-23 23:08:28,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1470 transitions. [2024-11-23 23:08:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2024-11-23 23:08:28,668 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:08:28,669 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:08:28,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-23 23:08:28,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-23 23:08:28,869 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:08:28,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:28,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1720793643, now seen corresponding path program 11 times [2024-11-23 23:08:28,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:28,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558644092] [2024-11-23 23:08:28,870 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:08:28,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:40,688 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 127 check-sat command(s) [2024-11-23 23:08:40,689 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:08:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 40463 backedges. 1 proven. 31626 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-11-23 23:08:53,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:53,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558644092] [2024-11-23 23:08:53,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558644092] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:08:53,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555532703] [2024-11-23 23:08:53,861 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 23:08:53,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:53,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:08:53,863 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:08:53,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ff172a-4aaf-46ed-813b-db8edd1a0960/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process