./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.c --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_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/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_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/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_2da40efa-9a95-47a7-8a88-3dcf30aac99b/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 008f13fd1550f54b25db8c20ee30759d3819e45d65744da9f4f77718b68e7e66 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 00:54:50,158 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 00:54:50,257 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-24 00:54:50,266 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 00:54:50,266 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 00:54:50,302 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 00:54:50,303 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 00:54:50,303 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 00:54:50,304 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 00:54:50,304 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 00:54:50,304 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 00:54:50,304 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 00:54:50,304 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 00:54:50,304 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 00:54:50,304 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 00:54:50,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 00:54:50,305 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 00:54:50,306 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 00:54:50,306 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 00:54:50,307 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 00:54:50,307 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 00:54:50,307 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 00:54:50,307 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 00:54:50,307 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 00:54:50,307 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 00:54:50,307 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 00:54:50,308 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 00:54:50,308 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 00:54:50,308 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 00:54:50,308 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:54:50,308 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:54:50,308 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:54:50,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:54:50,309 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 00:54:50,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:54:50,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:54:50,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:54:50,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:54:50,309 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 00:54:50,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 00:54:50,309 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 00:54:50,309 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 00:54:50,310 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 00:54:50,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 00:54:50,310 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 00:54:50,310 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 00:54:50,310 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 00:54:50,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 00:54:50,310 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_2da40efa-9a95-47a7-8a88-3dcf30aac99b/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 -> 008f13fd1550f54b25db8c20ee30759d3819e45d65744da9f4f77718b68e7e66 [2024-11-24 00:54:50,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 00:54:50,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 00:54:50,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 00:54:50,623 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 00:54:50,623 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 00:54:50,624 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.c [2024-11-24 00:54:53,522 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/data/bb203f37a/6b23c4585aa0402c94915c8422c95a90/FLAG36307980b [2024-11-24 00:54:53,785 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 00:54:53,785 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.c [2024-11-24 00:54:53,793 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/data/bb203f37a/6b23c4585aa0402c94915c8422c95a90/FLAG36307980b [2024-11-24 00:54:53,810 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/data/bb203f37a/6b23c4585aa0402c94915c8422c95a90 [2024-11-24 00:54:53,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 00:54:53,814 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 00:54:53,816 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 00:54:53,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 00:54:53,821 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 00:54:53,822 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:54:53" (1/1) ... [2024-11-24 00:54:53,823 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e0d556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:53, skipping insertion in model container [2024-11-24 00:54:53,823 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:54:53" (1/1) ... [2024-11-24 00:54:53,838 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:54:53,991 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_2da40efa-9a95-47a7-8a88-3dcf30aac99b/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.c[489,502] [2024-11-24 00:54:54,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:54:54,043 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 00:54:54,061 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_2da40efa-9a95-47a7-8a88-3dcf30aac99b/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.c[489,502] [2024-11-24 00:54:54,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:54:54,105 INFO L204 MainTranslator]: Completed translation [2024-11-24 00:54:54,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54 WrapperNode [2024-11-24 00:54:54,107 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 00:54:54,110 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 00:54:54,110 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 00:54:54,110 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 00:54:54,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,133 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,161 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-11-24 00:54:54,163 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 00:54:54,164 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 00:54:54,164 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 00:54:54,165 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 00:54:54,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,179 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,199 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-24 00:54:54,202 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,202 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,206 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,216 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,221 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,222 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 00:54:54,223 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 00:54:54,223 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 00:54:54,227 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 00:54:54,228 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (1/1) ... [2024-11-24 00:54:54,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:54:54,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:54:54,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 00:54:54,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 00:54:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 00:54:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-24 00:54:54,317 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-24 00:54:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 00:54:54,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 00:54:54,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 00:54:54,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-24 00:54:54,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-24 00:54:54,398 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 00:54:54,400 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 00:54:54,607 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-24 00:54:54,607 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 00:54:54,622 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 00:54:54,622 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-24 00:54:54,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:54:54 BoogieIcfgContainer [2024-11-24 00:54:54,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 00:54:54,625 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 00:54:54,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 00:54:54,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 00:54:54,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:54:53" (1/3) ... [2024-11-24 00:54:54,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ca3064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:54:54, skipping insertion in model container [2024-11-24 00:54:54,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:54:54" (2/3) ... [2024-11-24 00:54:54,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ca3064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:54:54, skipping insertion in model container [2024-11-24 00:54:54,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:54:54" (3/3) ... [2024-11-24 00:54:54,636 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound1.c [2024-11-24 00:54:54,651 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 00:54:54,653 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd-ll_valuebound1.c that has 3 procedures, 31 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-24 00:54:54,706 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 00:54:54,718 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;@1170b214, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 00:54:54,719 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-24 00:54:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-24 00:54:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-24 00:54:54,730 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:54:54,730 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:54:54,731 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:54:54,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:54:54,736 INFO L85 PathProgramCache]: Analyzing trace with hash -429534084, now seen corresponding path program 1 times [2024-11-24 00:54:54,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:54:54,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271258808] [2024-11-24 00:54:54,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:54,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:54:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:54:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-24 00:54:54,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:54:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271258808] [2024-11-24 00:54:54,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271258808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:54:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107355200] [2024-11-24 00:54:54,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:54,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:54:54,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:54:54,965 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:54:54,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 00:54:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:54:55,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-24 00:54:55,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:54:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-24 00:54:55,116 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:54:55,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107355200] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:54:55,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 00:54:55,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-24 00:54:55,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994643039] [2024-11-24 00:54:55,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:54:55,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-24 00:54:55,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:54:55,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-24 00:54:55,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-24 00:54:55,156 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-24 00:54:55,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:54:55,186 INFO L93 Difference]: Finished difference Result 59 states and 97 transitions. [2024-11-24 00:54:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-24 00:54:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-11-24 00:54:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:54:55,198 INFO L225 Difference]: With dead ends: 59 [2024-11-24 00:54:55,199 INFO L226 Difference]: Without dead ends: 27 [2024-11-24 00:54:55,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-24 00:54:55,205 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:54:55,208 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:54:55,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-24 00:54:55,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-24 00:54:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-24 00:54:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2024-11-24 00:54:55,257 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 28 [2024-11-24 00:54:55,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:54:55,258 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2024-11-24 00:54:55,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-24 00:54:55,259 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2024-11-24 00:54:55,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-24 00:54:55,260 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:54:55,261 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:54:55,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 00:54:55,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-24 00:54:55,466 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:54:55,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:54:55,466 INFO L85 PathProgramCache]: Analyzing trace with hash 341122360, now seen corresponding path program 1 times [2024-11-24 00:54:55,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:54:55,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92704278] [2024-11-24 00:54:55,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:55,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:54:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 00:54:55,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015364087] [2024-11-24 00:54:55,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:55,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:54:55,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:54:55,540 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:54:55,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 00:54:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:54:55,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 00:54:55,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:54:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-24 00:54:55,749 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:54:55,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:54:55,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92704278] [2024-11-24 00:54:55,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 00:54:55,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015364087] [2024-11-24 00:54:55,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015364087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:54:55,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:54:55,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:54:55,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565599732] [2024-11-24 00:54:55,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:54:55,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:54:55,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:54:55,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:54:55,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:54:55,756 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-24 00:54:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:54:55,875 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2024-11-24 00:54:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:54:55,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2024-11-24 00:54:55,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:54:55,880 INFO L225 Difference]: With dead ends: 42 [2024-11-24 00:54:55,880 INFO L226 Difference]: Without dead ends: 40 [2024-11-24 00:54:55,881 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:54:55,882 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:54:55,882 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 117 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:54:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-24 00:54:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2024-11-24 00:54:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-24 00:54:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 56 transitions. [2024-11-24 00:54:55,908 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 56 transitions. Word has length 28 [2024-11-24 00:54:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:54:55,911 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 56 transitions. [2024-11-24 00:54:55,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-24 00:54:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 56 transitions. [2024-11-24 00:54:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-24 00:54:55,912 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:54:55,912 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:54:55,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 00:54:56,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:54:56,113 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:54:56,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:54:56,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1239891739, now seen corresponding path program 1 times [2024-11-24 00:54:56,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:54:56,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919311114] [2024-11-24 00:54:56,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:56,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:54:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 00:54:56,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005968122] [2024-11-24 00:54:56,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:56,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:54:56,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:54:56,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:54:56,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 00:54:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:54:56,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 00:54:56,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:54:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-24 00:54:56,297 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:54:56,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:54:56,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919311114] [2024-11-24 00:54:56,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 00:54:56,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005968122] [2024-11-24 00:54:56,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005968122] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:54:56,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:54:56,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:54:56,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587593399] [2024-11-24 00:54:56,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:54:56,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:54:56,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:54:56,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:54:56,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:54:56,300 INFO L87 Difference]: Start difference. First operand 39 states and 56 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-24 00:54:56,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:54:56,393 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2024-11-24 00:54:56,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:54:56,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-11-24 00:54:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:54:56,395 INFO L225 Difference]: With dead ends: 46 [2024-11-24 00:54:56,395 INFO L226 Difference]: Without dead ends: 44 [2024-11-24 00:54:56,396 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:54:56,396 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:54:56,397 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 119 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:54:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-24 00:54:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2024-11-24 00:54:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-24 00:54:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2024-11-24 00:54:56,418 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 33 [2024-11-24 00:54:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:54:56,418 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2024-11-24 00:54:56,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-24 00:54:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2024-11-24 00:54:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-24 00:54:56,421 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:54:56,421 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:54:56,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 00:54:56,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:54:56,625 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:54:56,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:54:56,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1829049640, now seen corresponding path program 1 times [2024-11-24 00:54:56,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:54:56,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755353015] [2024-11-24 00:54:56,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:56,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:54:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 00:54:56,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894581727] [2024-11-24 00:54:56,663 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:56,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:54:56,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:54:56,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:54:56,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 00:54:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:54:56,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 00:54:56,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:54:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:54:56,822 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:54:56,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:54:56,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755353015] [2024-11-24 00:54:56,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 00:54:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894581727] [2024-11-24 00:54:56,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894581727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:54:56,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:54:56,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:54:56,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201158537] [2024-11-24 00:54:56,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:54:56,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:54:56,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:54:56,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:54:56,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:54:56,824 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-24 00:54:56,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:54:56,902 INFO L93 Difference]: Finished difference Result 66 states and 97 transitions. [2024-11-24 00:54:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:54:56,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-11-24 00:54:56,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:54:56,905 INFO L225 Difference]: With dead ends: 66 [2024-11-24 00:54:56,905 INFO L226 Difference]: Without dead ends: 62 [2024-11-24 00:54:56,906 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:54:56,907 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:54:56,907 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 118 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:54:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-24 00:54:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-24 00:54:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 32 states have internal predecessors, (37), 28 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-24 00:54:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 90 transitions. [2024-11-24 00:54:56,923 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 90 transitions. Word has length 38 [2024-11-24 00:54:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:54:56,923 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 90 transitions. [2024-11-24 00:54:56,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-24 00:54:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 90 transitions. [2024-11-24 00:54:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-24 00:54:56,925 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:54:56,925 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:54:56,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 00:54:57,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:54:57,129 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:54:57,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:54:57,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1821774163, now seen corresponding path program 1 times [2024-11-24 00:54:57,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:54:57,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280704190] [2024-11-24 00:54:57,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:57,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:54:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:54:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-24 00:54:57,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:54:57,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280704190] [2024-11-24 00:54:57,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280704190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:54:57,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:54:57,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:54:57,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108734339] [2024-11-24 00:54:57,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:54:57,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:54:57,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:54:57,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:54:57,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:54:57,415 INFO L87 Difference]: Start difference. First operand 62 states and 90 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-24 00:54:57,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:54:57,483 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2024-11-24 00:54:57,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:54:57,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2024-11-24 00:54:57,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:54:57,485 INFO L225 Difference]: With dead ends: 68 [2024-11-24 00:54:57,485 INFO L226 Difference]: Without dead ends: 66 [2024-11-24 00:54:57,486 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:54:57,487 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:54:57,487 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 128 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:54:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-24 00:54:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-24 00:54:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 35 states have internal predecessors, (40), 28 states have call successors, (28), 6 states have call predecessors, (28), 6 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-24 00:54:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 93 transitions. [2024-11-24 00:54:57,502 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 93 transitions. Word has length 44 [2024-11-24 00:54:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:54:57,503 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 93 transitions. [2024-11-24 00:54:57,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-11-24 00:54:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 93 transitions. [2024-11-24 00:54:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-24 00:54:57,504 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:54:57,504 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:54:57,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-24 00:54:57,505 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:54:57,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:54:57,505 INFO L85 PathProgramCache]: Analyzing trace with hash -626931772, now seen corresponding path program 1 times [2024-11-24 00:54:57,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:54:57,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450047706] [2024-11-24 00:54:57,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:57,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:54:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:54:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-24 00:54:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:54:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450047706] [2024-11-24 00:54:57,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450047706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:54:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054513248] [2024-11-24 00:54:57,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:57,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:54:57,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:54:57,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:54:57,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 00:54:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:54:57,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-24 00:54:57,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:54:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-24 00:54:58,084 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:54:58,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054513248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:54:58,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 00:54:58,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2024-11-24 00:54:58,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233992452] [2024-11-24 00:54:58,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:54:58,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:54:58,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:54:58,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:54:58,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:54:58,086 INFO L87 Difference]: Start difference. First operand 66 states and 93 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-24 00:54:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:54:58,161 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2024-11-24 00:54:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:54:58,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2024-11-24 00:54:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:54:58,164 INFO L225 Difference]: With dead ends: 76 [2024-11-24 00:54:58,164 INFO L226 Difference]: Without dead ends: 73 [2024-11-24 00:54:58,165 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-24 00:54:58,165 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:54:58,165 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 126 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:54:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-24 00:54:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-11-24 00:54:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 40 states have internal predecessors, (46), 25 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-24 00:54:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2024-11-24 00:54:58,189 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 45 [2024-11-24 00:54:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:54:58,192 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2024-11-24 00:54:58,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-24 00:54:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2024-11-24 00:54:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-24 00:54:58,193 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:54:58,194 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:54:58,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 00:54:58,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:54:58,394 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:54:58,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:54:58,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2077534714, now seen corresponding path program 1 times [2024-11-24 00:54:58,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:54:58,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314994476] [2024-11-24 00:54:58,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:58,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:54:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:54:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-24 00:54:58,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:54:58,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314994476] [2024-11-24 00:54:58,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314994476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:54:58,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721901992] [2024-11-24 00:54:58,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:54:58,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:54:58,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:54:58,814 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:54:58,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 00:54:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:54:58,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-24 00:54:58,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:54:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-24 00:54:59,048 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:54:59,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721901992] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:54:59,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 00:54:59,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-11-24 00:54:59,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953607304] [2024-11-24 00:54:59,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:54:59,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:54:59,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:54:59,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:54:59,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-24 00:54:59,049 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-24 00:54:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:54:59,178 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2024-11-24 00:54:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:54:59,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2024-11-24 00:54:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:54:59,180 INFO L225 Difference]: With dead ends: 84 [2024-11-24 00:54:59,180 INFO L226 Difference]: Without dead ends: 80 [2024-11-24 00:54:59,180 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-24 00:54:59,181 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:54:59,181 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 142 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:54:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-24 00:54:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2024-11-24 00:54:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 43 states have (on average 1.186046511627907) internal successors, (51), 46 states have internal predecessors, (51), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-24 00:54:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2024-11-24 00:54:59,196 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 49 [2024-11-24 00:54:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:54:59,196 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2024-11-24 00:54:59,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-24 00:54:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2024-11-24 00:54:59,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-24 00:54:59,197 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:54:59,198 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:54:59,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 00:54:59,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-24 00:54:59,398 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:54:59,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:54:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1713681393, now seen corresponding path program 2 times [2024-11-24 00:54:59,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:54:59,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799716224] [2024-11-24 00:54:59,399 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:54:59,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:54:59,416 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:54:59,416 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:54:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-24 00:54:59,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:54:59,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799716224] [2024-11-24 00:54:59,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799716224] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:54:59,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741717908] [2024-11-24 00:54:59,629 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:54:59,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:54:59,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:54:59,632 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:54:59,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 00:54:59,687 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:54:59,687 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:54:59,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-24 00:54:59,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:54:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-24 00:54:59,828 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:55:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-24 00:55:00,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741717908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:55:00,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:55:00,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-24 00:55:00,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535509344] [2024-11-24 00:55:00,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:55:00,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 00:55:00,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:55:00,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 00:55:00,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:55:00,021 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-11-24 00:55:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:55:00,198 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2024-11-24 00:55:00,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:55:00,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 50 [2024-11-24 00:55:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:55:00,200 INFO L225 Difference]: With dead ends: 102 [2024-11-24 00:55:00,200 INFO L226 Difference]: Without dead ends: 68 [2024-11-24 00:55:00,201 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-24 00:55:00,201 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 28 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:55:00,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 156 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:55:00,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-24 00:55:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-24 00:55:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-24 00:55:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2024-11-24 00:55:00,214 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 50 [2024-11-24 00:55:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:55:00,214 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2024-11-24 00:55:00,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-11-24 00:55:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2024-11-24 00:55:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-24 00:55:00,216 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:55:00,216 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:55:00,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-24 00:55:00,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-24 00:55:00,417 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:55:00,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:55:00,417 INFO L85 PathProgramCache]: Analyzing trace with hash -373052698, now seen corresponding path program 1 times [2024-11-24 00:55:00,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:55:00,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114780632] [2024-11-24 00:55:00,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:55:00,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:55:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:55:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-24 00:55:00,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:55:00,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114780632] [2024-11-24 00:55:00,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114780632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:55:00,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567562526] [2024-11-24 00:55:00,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:55:00,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:55:00,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:55:00,692 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:55:00,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 00:55:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:55:00,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:55:00,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:55:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 39 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-24 00:55:00,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:55:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-24 00:55:01,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567562526] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:55:01,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:55:01,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-24 00:55:01,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583383764] [2024-11-24 00:55:01,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:55:01,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 00:55:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:55:01,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 00:55:01,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-24 00:55:01,091 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-24 00:55:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:55:01,200 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2024-11-24 00:55:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:55:01,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 55 [2024-11-24 00:55:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:55:01,201 INFO L225 Difference]: With dead ends: 72 [2024-11-24 00:55:01,201 INFO L226 Difference]: Without dead ends: 0 [2024-11-24 00:55:01,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-24 00:55:01,202 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:55:01,203 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 110 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:55:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-24 00:55:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-24 00:55:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:55:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-24 00:55:01,204 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2024-11-24 00:55:01,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:55:01,204 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-24 00:55:01,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-24 00:55:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-24 00:55:01,205 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-24 00:55:01,209 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-24 00:55:01,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-24 00:55:01,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-24 00:55:01,413 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:55:01,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-24 00:55:01,714 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-24 00:55:01,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 12:55:01 BoogieIcfgContainer [2024-11-24 00:55:01,727 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-24 00:55:01,728 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-24 00:55:01,728 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-24 00:55:01,728 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-24 00:55:01,729 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:54:54" (3/4) ... [2024-11-24 00:55:01,731 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-24 00:55:01,737 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-11-24 00:55:01,737 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-24 00:55:01,741 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-24 00:55:01,741 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-24 00:55:01,741 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-24 00:55:01,741 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-24 00:55:01,841 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/witness.graphml [2024-11-24 00:55:01,842 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/witness.yml [2024-11-24 00:55:01,842 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-24 00:55:01,844 INFO L158 Benchmark]: Toolchain (without parser) took 8028.68ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 93.2MB in the beginning and 116.1MB in the end (delta: -22.9MB). Peak memory consumption was 79.3MB. Max. memory is 16.1GB. [2024-11-24 00:55:01,845 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 167.8MB. Free memory is still 103.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-24 00:55:01,845 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.09ms. Allocated memory is still 117.4MB. Free memory was 93.2MB in the beginning and 81.1MB in the end (delta: 12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-24 00:55:01,845 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.75ms. Allocated memory is still 117.4MB. Free memory was 81.1MB in the beginning and 80.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-24 00:55:01,845 INFO L158 Benchmark]: Boogie Preprocessor took 58.17ms. Allocated memory is still 117.4MB. Free memory was 79.7MB in the beginning and 78.7MB in the end (delta: 971.8kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-24 00:55:01,846 INFO L158 Benchmark]: RCFGBuilder took 399.62ms. Allocated memory is still 117.4MB. Free memory was 78.7MB in the beginning and 67.5MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-24 00:55:01,846 INFO L158 Benchmark]: TraceAbstraction took 7102.43ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 67.1MB in the beginning and 45.6MB in the end (delta: 21.5MB). Peak memory consumption was 45.7MB. Max. memory is 16.1GB. [2024-11-24 00:55:01,846 INFO L158 Benchmark]: Witness Printer took 113.93ms. Allocated memory is still 142.6MB. Free memory was 45.6MB in the beginning and 116.1MB in the end (delta: -70.5MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2024-11-24 00:55:01,850 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 167.8MB. Free memory is still 103.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 293.09ms. Allocated memory is still 117.4MB. Free memory was 93.2MB in the beginning and 81.1MB in the end (delta: 12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.75ms. Allocated memory is still 117.4MB. Free memory was 81.1MB in the beginning and 80.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 58.17ms. Allocated memory is still 117.4MB. Free memory was 79.7MB in the beginning and 78.7MB in the end (delta: 971.8kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 399.62ms. Allocated memory is still 117.4MB. Free memory was 78.7MB in the beginning and 67.5MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 7102.43ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 67.1MB in the beginning and 45.6MB in the end (delta: 21.5MB). Peak memory consumption was 45.7MB. Max. memory is 16.1GB. * Witness Printer took 113.93ms. Allocated memory is still 142.6MB. Free memory was 45.6MB in the beginning and 116.1MB in the end (delta: -70.5MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.7s, OverallIterations: 9, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 85 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 62 mSDsluCounter, 1057 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 770 mSDsCounter, 54 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 335 IncrementalHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 54 mSolverCounterUnsat, 287 mSDtfsCounter, 335 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 479 GetRequests, 410 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=7, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 5 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 696 NumberOfCodeBlocks, 696 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 686 ConstructedInterpolants, 0 QuantifiedInterpolants, 1397 SizeOfPredicates, 13 NumberOfNonLiveVariables, 853 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 720/775 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((b == 1) && (p == 1)) && (b == y)) && (x == 1)) && (r == 0)) && (q == 0)) && (a == x)) && (s == 1)) RESULT: Ultimate proved your program to be correct! [2024-11-24 00:55:01,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da40efa-9a95-47a7-8a88-3dcf30aac99b/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE