./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/relax-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/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_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/relax-2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/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_9a818ff0-21a2-431a-a1a5-28aa10d37844/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 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 00:29:35,658 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 00:29:35,733 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-24 00:29:35,738 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 00:29:35,739 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 00:29:35,764 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 00:29:35,764 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 00:29:35,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 00:29:35,765 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 00:29:35,765 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 00:29:35,765 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 00:29:35,765 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 00:29:35,766 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 00:29:35,766 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 00:29:35,766 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 00:29:35,766 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 00:29:35,766 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 00:29:35,766 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 00:29:35,766 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 00:29:35,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 00:29:35,767 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 00:29:35,767 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 00:29:35,767 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 00:29:35,767 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 00:29:35,767 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 00:29:35,767 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 00:29:35,767 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 00:29:35,767 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 00:29:35,768 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 00:29:35,768 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:29:35,768 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:29:35,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:29:35,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:29:35,768 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 00:29:35,768 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:29:35,768 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:29:35,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:29:35,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:29:35,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 00:29:35,769 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 00:29:35,769 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 00:29:35,769 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 00:29:35,769 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 00:29:35,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 00:29:35,769 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 00:29:35,770 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 00:29:35,770 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 00:29:35,770 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 00:29:35,770 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_9a818ff0-21a2-431a-a1a5-28aa10d37844/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 -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2024-11-24 00:29:36,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 00:29:36,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 00:29:36,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 00:29:36,112 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 00:29:36,112 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 00:29:36,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-24 00:29:39,108 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/data/1c722d6a1/b65cf2b2f12a423186603db87ba3c295/FLAG6a1857d3c [2024-11-24 00:29:39,439 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 00:29:39,440 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-24 00:29:39,453 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/data/1c722d6a1/b65cf2b2f12a423186603db87ba3c295/FLAG6a1857d3c [2024-11-24 00:29:39,469 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/data/1c722d6a1/b65cf2b2f12a423186603db87ba3c295 [2024-11-24 00:29:39,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 00:29:39,473 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 00:29:39,474 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 00:29:39,474 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 00:29:39,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 00:29:39,479 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:29:39" (1/1) ... [2024-11-24 00:29:39,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55135188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:39, skipping insertion in model container [2024-11-24 00:29:39,483 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:29:39" (1/1) ... [2024-11-24 00:29:39,516 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:29:39,710 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_9a818ff0-21a2-431a-a1a5-28aa10d37844/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2024-11-24 00:29:39,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:29:39,952 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 00:29:39,965 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_9a818ff0-21a2-431a-a1a5-28aa10d37844/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2024-11-24 00:29:40,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:29:40,065 INFO L204 MainTranslator]: Completed translation [2024-11-24 00:29:40,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40 WrapperNode [2024-11-24 00:29:40,067 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 00:29:40,068 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 00:29:40,068 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 00:29:40,068 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 00:29:40,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,097 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,120 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 135 [2024-11-24 00:29:40,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 00:29:40,121 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 00:29:40,121 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 00:29:40,121 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 00:29:40,130 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,134 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,146 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-24 00:29:40,147 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,147 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,154 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,155 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,159 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,161 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,162 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,168 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 00:29:40,169 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 00:29:40,173 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 00:29:40,173 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 00:29:40,174 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (1/1) ... [2024-11-24 00:29:40,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:29:40,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:29:40,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 00:29:40,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 00:29:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 00:29:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 00:29:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-24 00:29:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-24 00:29:40,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-24 00:29:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 00:29:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 00:29:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-24 00:29:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-24 00:29:40,250 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-24 00:29:40,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 00:29:40,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 00:29:40,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 00:29:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 00:29:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-24 00:29:40,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 00:29:40,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 00:29:40,400 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 00:29:40,402 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 00:29:40,785 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-11-24 00:29:40,785 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 00:29:40,798 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 00:29:40,799 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-24 00:29:40,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:29:40 BoogieIcfgContainer [2024-11-24 00:29:40,801 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 00:29:40,802 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 00:29:40,804 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 00:29:40,809 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 00:29:40,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:29:39" (1/3) ... [2024-11-24 00:29:40,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259cff69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:29:40, skipping insertion in model container [2024-11-24 00:29:40,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:29:40" (2/3) ... [2024-11-24 00:29:40,811 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259cff69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:29:40, skipping insertion in model container [2024-11-24 00:29:40,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:29:40" (3/3) ... [2024-11-24 00:29:40,813 INFO L128 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2024-11-24 00:29:40,837 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 00:29:40,839 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG relax-2-2.i that has 3 procedures, 57 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-24 00:29:40,908 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 00:29:40,926 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;@4a0fd05f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 00:29:40,927 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-24 00:29:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 50 states have internal predecessors, (71), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-24 00:29:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-24 00:29:40,939 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:40,941 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:40,941 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:40,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:40,947 INFO L85 PathProgramCache]: Analyzing trace with hash 475881552, now seen corresponding path program 1 times [2024-11-24 00:29:40,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:40,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955894962] [2024-11-24 00:29:40,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:40,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:29:41,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:41,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955894962] [2024-11-24 00:29:41,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955894962] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:29:41,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491520551] [2024-11-24 00:29:41,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:41,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:41,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:29:41,209 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:29:41,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 00:29:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:41,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-24 00:29:41,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:29:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:29:41,425 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:29:41,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491520551] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:29:41,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 00:29:41,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-24 00:29:41,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567671863] [2024-11-24 00:29:41,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:41,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-24 00:29:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:41,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-24 00:29:41,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-24 00:29:41,471 INFO L87 Difference]: Start difference. First operand has 57 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 50 states have internal predecessors, (71), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:29:41,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:41,514 INFO L93 Difference]: Finished difference Result 111 states and 173 transitions. [2024-11-24 00:29:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-24 00:29:41,519 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-11-24 00:29:41,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:41,532 INFO L225 Difference]: With dead ends: 111 [2024-11-24 00:29:41,532 INFO L226 Difference]: Without dead ends: 51 [2024-11-24 00:29:41,536 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 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 00:29:41,540 INFO L435 NwaCegarLoop]: 78 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, 78 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 00:29:41,541 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:29:41,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-24 00:29:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-24 00:29:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 45 states have internal predecessors, (57), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:29:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2024-11-24 00:29:41,608 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 24 [2024-11-24 00:29:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:41,609 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2024-11-24 00:29:41,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:29:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2024-11-24 00:29:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-24 00:29:41,611 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:41,611 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:41,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 00:29:41,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-24 00:29:41,813 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:41,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:41,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1621630576, now seen corresponding path program 1 times [2024-11-24 00:29:41,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:41,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883863866] [2024-11-24 00:29:41,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:41,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:42,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:42,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883863866] [2024-11-24 00:29:42,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883863866] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:29:42,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:29:42,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:29:42,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089489435] [2024-11-24 00:29:42,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:42,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:29:42,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:42,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:29:42,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:29:42,319 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:42,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:42,373 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2024-11-24 00:29:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:29:42,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-11-24 00:29:42,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:42,376 INFO L225 Difference]: With dead ends: 75 [2024-11-24 00:29:42,377 INFO L226 Difference]: Without dead ends: 53 [2024-11-24 00:29:42,378 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:29:42,379 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:42,380 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:29:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-24 00:29:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-24 00:29:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.372093023255814) internal successors, (59), 47 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:29:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2024-11-24 00:29:42,397 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 24 [2024-11-24 00:29:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:42,400 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2024-11-24 00:29:42,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:42,400 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2024-11-24 00:29:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-24 00:29:42,403 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:42,403 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:42,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 00:29:42,404 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:42,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:42,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1478150539, now seen corresponding path program 1 times [2024-11-24 00:29:42,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:42,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771040554] [2024-11-24 00:29:42,406 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:42,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:42,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:42,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771040554] [2024-11-24 00:29:42,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771040554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:29:42,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:29:42,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:29:42,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245439283] [2024-11-24 00:29:42,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:42,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:29:42,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:42,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:29:42,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:29:42,934 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:43,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:43,122 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2024-11-24 00:29:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:29:43,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2024-11-24 00:29:43,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:43,124 INFO L225 Difference]: With dead ends: 110 [2024-11-24 00:29:43,124 INFO L226 Difference]: Without dead ends: 75 [2024-11-24 00:29:43,125 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:29:43,126 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 22 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:43,126 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 284 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:29:43,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-24 00:29:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2024-11-24 00:29:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 66 states have internal predecessors, (85), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:29:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions. [2024-11-24 00:29:43,137 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 27 [2024-11-24 00:29:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:43,137 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions. [2024-11-24 00:29:43,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions. [2024-11-24 00:29:43,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-24 00:29:43,139 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:43,139 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:43,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-24 00:29:43,139 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:43,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:43,140 INFO L85 PathProgramCache]: Analyzing trace with hash -915852063, now seen corresponding path program 1 times [2024-11-24 00:29:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:43,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379225856] [2024-11-24 00:29:43,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:43,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:43,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:43,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379225856] [2024-11-24 00:29:43,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379225856] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:29:43,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:29:43,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-24 00:29:43,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133134534] [2024-11-24 00:29:43,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:43,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:29:43,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:43,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:29:43,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:29:43,952 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:44,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:44,354 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2024-11-24 00:29:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:29:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2024-11-24 00:29:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:44,356 INFO L225 Difference]: With dead ends: 113 [2024-11-24 00:29:44,356 INFO L226 Difference]: Without dead ends: 100 [2024-11-24 00:29:44,357 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-24 00:29:44,358 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 62 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:44,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 386 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 00:29:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-24 00:29:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2024-11-24 00:29:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 1.375) internal successors, (99), 76 states have internal predecessors, (99), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:29:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2024-11-24 00:29:44,386 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 112 transitions. Word has length 28 [2024-11-24 00:29:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:44,386 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 112 transitions. [2024-11-24 00:29:44,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 112 transitions. [2024-11-24 00:29:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-24 00:29:44,388 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:44,388 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:44,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-24 00:29:44,388 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:44,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:44,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1831063463, now seen corresponding path program 1 times [2024-11-24 00:29:44,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:44,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490534759] [2024-11-24 00:29:44,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:44,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:45,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:45,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490534759] [2024-11-24 00:29:45,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490534759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:29:45,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39674247] [2024-11-24 00:29:45,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:45,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:45,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:29:45,190 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:29:45,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 00:29:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:45,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:29:45,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:29:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:45,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:29:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:46,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39674247] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:29:46,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:29:46,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2024-11-24 00:29:46,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059143918] [2024-11-24 00:29:46,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:29:46,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-24 00:29:46,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:46,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-24 00:29:46,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2024-11-24 00:29:46,477 INFO L87 Difference]: Start difference. First operand 82 states and 112 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:47,434 INFO L93 Difference]: Finished difference Result 212 states and 301 transitions. [2024-11-24 00:29:47,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-24 00:29:47,436 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-24 00:29:47,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:47,441 INFO L225 Difference]: With dead ends: 212 [2024-11-24 00:29:47,441 INFO L226 Difference]: Without dead ends: 181 [2024-11-24 00:29:47,445 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2024-11-24 00:29:47,446 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 287 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:47,447 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1211 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-24 00:29:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-24 00:29:47,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 135. [2024-11-24 00:29:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 122 states have (on average 1.3934426229508197) internal successors, (170), 127 states have internal predecessors, (170), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 187 transitions. [2024-11-24 00:29:47,497 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 187 transitions. Word has length 29 [2024-11-24 00:29:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:47,501 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 187 transitions. [2024-11-24 00:29:47,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 187 transitions. [2024-11-24 00:29:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-24 00:29:47,503 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:47,503 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:47,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 00:29:47,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:47,704 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:47,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1026902139, now seen corresponding path program 1 times [2024-11-24 00:29:47,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:47,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982311049] [2024-11-24 00:29:47,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:47,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:48,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:48,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982311049] [2024-11-24 00:29:48,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982311049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:29:48,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93167415] [2024-11-24 00:29:48,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:48,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:48,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:29:48,411 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:29:48,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 00:29:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:48,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-24 00:29:48,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:29:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:48,799 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:29:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:29:49,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93167415] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:29:49,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:29:49,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9] total 20 [2024-11-24 00:29:49,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646372646] [2024-11-24 00:29:49,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:49,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 00:29:49,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:49,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 00:29:49,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-24 00:29:49,023 INFO L87 Difference]: Start difference. First operand 135 states and 187 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:49,153 INFO L93 Difference]: Finished difference Result 166 states and 220 transitions. [2024-11-24 00:29:49,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:29:49,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-24 00:29:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:49,155 INFO L225 Difference]: With dead ends: 166 [2024-11-24 00:29:49,155 INFO L226 Difference]: Without dead ends: 138 [2024-11-24 00:29:49,155 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-24 00:29:49,156 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 10 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:49,156 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 394 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:29:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-24 00:29:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2024-11-24 00:29:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 127 states have internal predecessors, (165), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 182 transitions. [2024-11-24 00:29:49,179 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 182 transitions. Word has length 30 [2024-11-24 00:29:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:49,181 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 182 transitions. [2024-11-24 00:29:49,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 182 transitions. [2024-11-24 00:29:49,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-24 00:29:49,183 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:49,183 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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 00:29:49,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 00:29:49,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:49,390 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:49,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:49,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1677967043, now seen corresponding path program 2 times [2024-11-24 00:29:49,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:49,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456678138] [2024-11-24 00:29:49,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:29:49,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:49,438 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 00:29:49,438 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:29:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:29:49,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:49,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456678138] [2024-11-24 00:29:49,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456678138] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:29:49,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:29:49,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-24 00:29:49,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561448612] [2024-11-24 00:29:49,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:49,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 00:29:49,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:49,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 00:29:49,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-24 00:29:49,935 INFO L87 Difference]: Start difference. First operand 135 states and 182 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:50,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:50,431 INFO L93 Difference]: Finished difference Result 240 states and 325 transitions. [2024-11-24 00:29:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-24 00:29:50,432 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-24 00:29:50,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:50,433 INFO L225 Difference]: With dead ends: 240 [2024-11-24 00:29:50,435 INFO L226 Difference]: Without dead ends: 210 [2024-11-24 00:29:50,435 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:29:50,436 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 174 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:50,438 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 302 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 00:29:50,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-24 00:29:50,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2024-11-24 00:29:50,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 139 states have (on average 1.3453237410071943) internal successors, (187), 144 states have internal predecessors, (187), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 204 transitions. [2024-11-24 00:29:50,461 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 204 transitions. Word has length 31 [2024-11-24 00:29:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:50,462 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 204 transitions. [2024-11-24 00:29:50,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 204 transitions. [2024-11-24 00:29:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-24 00:29:50,463 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:50,463 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:50,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-24 00:29:50,464 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:50,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:50,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1875349318, now seen corresponding path program 1 times [2024-11-24 00:29:50,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:50,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508013336] [2024-11-24 00:29:50,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:50,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:50,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:50,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508013336] [2024-11-24 00:29:50,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508013336] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:29:50,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:29:50,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:29:50,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336378371] [2024-11-24 00:29:50,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:50,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:29:50,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:50,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:29:50,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:29:50,537 INFO L87 Difference]: Start difference. First operand 153 states and 204 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:50,572 INFO L93 Difference]: Finished difference Result 183 states and 236 transitions. [2024-11-24 00:29:50,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:29:50,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-24 00:29:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:50,576 INFO L225 Difference]: With dead ends: 183 [2024-11-24 00:29:50,576 INFO L226 Difference]: Without dead ends: 151 [2024-11-24 00:29:50,576 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:29:50,577 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:50,577 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 195 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:29:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-24 00:29:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-11-24 00:29:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 137 states have (on average 1.2992700729927007) internal successors, (178), 142 states have internal predecessors, (178), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 195 transitions. [2024-11-24 00:29:50,594 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 195 transitions. Word has length 31 [2024-11-24 00:29:50,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:50,594 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 195 transitions. [2024-11-24 00:29:50,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:50,594 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 195 transitions. [2024-11-24 00:29:50,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-24 00:29:50,595 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:50,595 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:50,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-24 00:29:50,595 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:50,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:50,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2128640524, now seen corresponding path program 1 times [2024-11-24 00:29:50,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:50,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622395862] [2024-11-24 00:29:50,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:50,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:50,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:50,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622395862] [2024-11-24 00:29:50,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622395862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:29:50,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:29:50,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:29:50,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470431089] [2024-11-24 00:29:50,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:50,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:29:50,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:50,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:29:50,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:29:50,628 INFO L87 Difference]: Start difference. First operand 151 states and 195 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:50,671 INFO L93 Difference]: Finished difference Result 230 states and 299 transitions. [2024-11-24 00:29:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:29:50,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-24 00:29:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:50,673 INFO L225 Difference]: With dead ends: 230 [2024-11-24 00:29:50,673 INFO L226 Difference]: Without dead ends: 192 [2024-11-24 00:29:50,674 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:29:50,674 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 4 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:50,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 127 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:29:50,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-24 00:29:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2024-11-24 00:29:50,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 178 states have (on average 1.2865168539325842) internal successors, (229), 183 states have internal predecessors, (229), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 246 transitions. [2024-11-24 00:29:50,700 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 246 transitions. Word has length 32 [2024-11-24 00:29:50,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:50,700 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 246 transitions. [2024-11-24 00:29:50,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 246 transitions. [2024-11-24 00:29:50,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-24 00:29:50,701 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:50,702 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:50,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-24 00:29:50,702 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:50,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:50,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1677619310, now seen corresponding path program 1 times [2024-11-24 00:29:50,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:50,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107430461] [2024-11-24 00:29:50,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:50,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-24 00:29:50,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:50,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107430461] [2024-11-24 00:29:50,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107430461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:29:50,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:29:50,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:29:50,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551576357] [2024-11-24 00:29:50,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:50,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:29:50,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:50,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:29:50,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:29:50,893 INFO L87 Difference]: Start difference. First operand 192 states and 246 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:50,997 INFO L93 Difference]: Finished difference Result 201 states and 254 transitions. [2024-11-24 00:29:50,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:29:50,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2024-11-24 00:29:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:50,999 INFO L225 Difference]: With dead ends: 201 [2024-11-24 00:29:51,000 INFO L226 Difference]: Without dead ends: 156 [2024-11-24 00:29:51,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-24 00:29:51,001 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 5 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:51,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 229 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:29:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-24 00:29:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2024-11-24 00:29:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 142 states have (on average 1.2887323943661972) internal successors, (183), 147 states have internal predecessors, (183), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 200 transitions. [2024-11-24 00:29:51,019 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 200 transitions. Word has length 37 [2024-11-24 00:29:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:51,019 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 200 transitions. [2024-11-24 00:29:51,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 200 transitions. [2024-11-24 00:29:51,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-24 00:29:51,020 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:51,021 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:51,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-24 00:29:51,021 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:51,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:51,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1688272104, now seen corresponding path program 1 times [2024-11-24 00:29:51,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:51,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277744186] [2024-11-24 00:29:51,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:29:51,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:51,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277744186] [2024-11-24 00:29:51,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277744186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:29:51,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718636663] [2024-11-24 00:29:51,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:51,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:51,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:29:51,314 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:29:51,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 00:29:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:51,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-24 00:29:51,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:29:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:51,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:29:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:52,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718636663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:29:52,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:29:52,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 13] total 27 [2024-11-24 00:29:52,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868040168] [2024-11-24 00:29:52,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:29:52,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-24 00:29:52,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:52,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-24 00:29:52,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-11-24 00:29:52,270 INFO L87 Difference]: Start difference. First operand 156 states and 200 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:53,014 INFO L93 Difference]: Finished difference Result 210 states and 269 transitions. [2024-11-24 00:29:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-24 00:29:53,014 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2024-11-24 00:29:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:53,015 INFO L225 Difference]: With dead ends: 210 [2024-11-24 00:29:53,016 INFO L226 Difference]: Without dead ends: 154 [2024-11-24 00:29:53,017 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2024-11-24 00:29:53,017 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 121 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:53,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 871 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 00:29:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-24 00:29:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 114. [2024-11-24 00:29:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 100 states have (on average 1.29) internal successors, (129), 105 states have internal predecessors, (129), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 146 transitions. [2024-11-24 00:29:53,033 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 146 transitions. Word has length 38 [2024-11-24 00:29:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:53,034 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 146 transitions. [2024-11-24 00:29:53,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 146 transitions. [2024-11-24 00:29:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-24 00:29:53,035 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:53,035 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:53,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 00:29:53,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:53,236 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:53,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:53,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1420158312, now seen corresponding path program 1 times [2024-11-24 00:29:53,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:53,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863476382] [2024-11-24 00:29:53,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:53,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:29:53,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:53,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863476382] [2024-11-24 00:29:53,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863476382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:29:53,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759228981] [2024-11-24 00:29:53,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:53,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:53,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:29:53,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:29:53,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 00:29:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:53,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:29:53,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:29:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:29:53,680 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:29:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:29:53,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759228981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:29:53,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:29:53,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 15 [2024-11-24 00:29:53,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613427612] [2024-11-24 00:29:53,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:29:53,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-24 00:29:53,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:53,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-24 00:29:53,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-24 00:29:53,944 INFO L87 Difference]: Start difference. First operand 114 states and 146 transitions. Second operand has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:54,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:54,163 INFO L93 Difference]: Finished difference Result 155 states and 204 transitions. [2024-11-24 00:29:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:29:54,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2024-11-24 00:29:54,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:54,164 INFO L225 Difference]: With dead ends: 155 [2024-11-24 00:29:54,165 INFO L226 Difference]: Without dead ends: 148 [2024-11-24 00:29:54,165 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-24 00:29:54,166 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 97 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:54,166 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 588 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:29:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-24 00:29:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 123. [2024-11-24 00:29:54,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 109 states have (on average 1.2844036697247707) internal successors, (140), 114 states have internal predecessors, (140), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 157 transitions. [2024-11-24 00:29:54,180 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 157 transitions. Word has length 41 [2024-11-24 00:29:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:54,180 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 157 transitions. [2024-11-24 00:29:54,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:54,180 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 157 transitions. [2024-11-24 00:29:54,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-24 00:29:54,181 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:54,181 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:54,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 00:29:54,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:54,386 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:54,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1418311270, now seen corresponding path program 1 times [2024-11-24 00:29:54,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:54,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251176502] [2024-11-24 00:29:54,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:29:54,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:54,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251176502] [2024-11-24 00:29:54,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251176502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:29:54,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111905241] [2024-11-24 00:29:54,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:54,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:54,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:29:54,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:29:54,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 00:29:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:54,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 00:29:54,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:29:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:29:54,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:29:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:29:55,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111905241] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:29:55,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:29:55,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 6] total 13 [2024-11-24 00:29:55,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995895430] [2024-11-24 00:29:55,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:55,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:29:55,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:55,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:29:55,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-24 00:29:55,108 INFO L87 Difference]: Start difference. First operand 123 states and 157 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:55,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:55,212 INFO L93 Difference]: Finished difference Result 145 states and 187 transitions. [2024-11-24 00:29:55,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:29:55,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2024-11-24 00:29:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:55,215 INFO L225 Difference]: With dead ends: 145 [2024-11-24 00:29:55,215 INFO L226 Difference]: Without dead ends: 136 [2024-11-24 00:29:55,215 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-24 00:29:55,216 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 34 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:55,216 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 178 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:29:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-24 00:29:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2024-11-24 00:29:55,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 113 states have (on average 1.2831858407079646) internal successors, (145), 118 states have internal predecessors, (145), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:55,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 162 transitions. [2024-11-24 00:29:55,240 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 162 transitions. Word has length 41 [2024-11-24 00:29:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:55,240 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 162 transitions. [2024-11-24 00:29:55,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:55,241 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 162 transitions. [2024-11-24 00:29:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-24 00:29:55,241 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:55,241 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:55,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-24 00:29:55,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-24 00:29:55,445 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:55,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:55,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1441121776, now seen corresponding path program 1 times [2024-11-24 00:29:55,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:55,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678246737] [2024-11-24 00:29:55,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:55,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:29:55,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:55,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678246737] [2024-11-24 00:29:55,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678246737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:29:55,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:29:55,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:29:55,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690198866] [2024-11-24 00:29:55,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:55,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:29:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:55,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:29:55,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:29:55,610 INFO L87 Difference]: Start difference. First operand 127 states and 162 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:55,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:55,695 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2024-11-24 00:29:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:29:55,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2024-11-24 00:29:55,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:55,697 INFO L225 Difference]: With dead ends: 140 [2024-11-24 00:29:55,697 INFO L226 Difference]: Without dead ends: 131 [2024-11-24 00:29:55,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:29:55,698 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 32 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:55,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 154 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:29:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-24 00:29:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2024-11-24 00:29:55,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 111 states have (on average 1.2792792792792793) internal successors, (142), 116 states have internal predecessors, (142), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 159 transitions. [2024-11-24 00:29:55,719 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 159 transitions. Word has length 42 [2024-11-24 00:29:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:55,719 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 159 transitions. [2024-11-24 00:29:55,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 159 transitions. [2024-11-24 00:29:55,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-24 00:29:55,721 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:55,721 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:55,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-24 00:29:55,722 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:55,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:55,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1997211126, now seen corresponding path program 1 times [2024-11-24 00:29:55,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:55,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450488468] [2024-11-24 00:29:55,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:55,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:29:55,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:55,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450488468] [2024-11-24 00:29:55,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450488468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:29:55,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117970081] [2024-11-24 00:29:55,918 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:55,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:55,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:29:55,920 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:29:55,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 00:29:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:56,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-24 00:29:56,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:29:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:29:56,035 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:29:56,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117970081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:29:56,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 00:29:56,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2024-11-24 00:29:56,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627700803] [2024-11-24 00:29:56,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:56,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:29:56,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:56,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:29:56,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-24 00:29:56,037 INFO L87 Difference]: Start difference. First operand 125 states and 159 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:29:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:56,076 INFO L93 Difference]: Finished difference Result 150 states and 193 transitions. [2024-11-24 00:29:56,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:29:56,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-24 00:29:56,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:56,079 INFO L225 Difference]: With dead ends: 150 [2024-11-24 00:29:56,080 INFO L226 Difference]: Without dead ends: 132 [2024-11-24 00:29:56,081 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-24 00:29:56,083 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:56,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 123 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:29:56,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-24 00:29:56,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2024-11-24 00:29:56,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 120 states have internal predecessors, (148), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2024-11-24 00:29:56,103 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 43 [2024-11-24 00:29:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:56,103 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2024-11-24 00:29:56,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:29:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2024-11-24 00:29:56,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-24 00:29:56,105 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:56,105 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:56,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-24 00:29:56,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-24 00:29:56,310 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:56,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1944453300, now seen corresponding path program 1 times [2024-11-24 00:29:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:56,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090525332] [2024-11-24 00:29:56,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:56,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:29:56,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:56,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090525332] [2024-11-24 00:29:56,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090525332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:29:56,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482285445] [2024-11-24 00:29:56,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:56,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:56,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:29:56,675 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:29:56,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 00:29:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:56,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-24 00:29:56,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:29:56,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:29:56,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:29:57,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:29:57,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-24 00:29:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:29:57,350 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:29:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-24 00:29:57,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482285445] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:29:57,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:29:57,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9, 14] total 30 [2024-11-24 00:29:57,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570339226] [2024-11-24 00:29:57,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:29:57,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 00:29:57,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:57,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 00:29:57,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-11-24 00:29:57,784 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:58,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:58,276 INFO L93 Difference]: Finished difference Result 235 states and 310 transitions. [2024-11-24 00:29:58,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 00:29:58,276 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2024-11-24 00:29:58,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:58,278 INFO L225 Difference]: With dead ends: 235 [2024-11-24 00:29:58,278 INFO L226 Difference]: Without dead ends: 226 [2024-11-24 00:29:58,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2024-11-24 00:29:58,280 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 96 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:58,281 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 556 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:29:58,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-24 00:29:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 175. [2024-11-24 00:29:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 161 states have (on average 1.3229813664596273) internal successors, (213), 166 states have internal predecessors, (213), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 230 transitions. [2024-11-24 00:29:58,316 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 230 transitions. Word has length 45 [2024-11-24 00:29:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:58,317 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 230 transitions. [2024-11-24 00:29:58,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:58,317 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 230 transitions. [2024-11-24 00:29:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-24 00:29:58,318 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:58,318 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:58,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-24 00:29:58,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-24 00:29:58,519 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:58,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:58,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1264394930, now seen corresponding path program 1 times [2024-11-24 00:29:58,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:58,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711163198] [2024-11-24 00:29:58,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:58,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:29:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:29:58,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:29:58,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711163198] [2024-11-24 00:29:58,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711163198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:29:58,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49622760] [2024-11-24 00:29:58,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:58,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:29:58,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:29:58,892 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:29:58,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 00:29:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:29:59,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-24 00:29:59,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:29:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:29:59,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:29:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:29:59,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49622760] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:29:59,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:29:59,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 20 [2024-11-24 00:29:59,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597227499] [2024-11-24 00:29:59,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:29:59,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-24 00:29:59,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:29:59,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-24 00:29:59,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-24 00:29:59,327 INFO L87 Difference]: Start difference. First operand 175 states and 230 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:59,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:29:59,719 INFO L93 Difference]: Finished difference Result 335 states and 438 transitions. [2024-11-24 00:29:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 00:29:59,720 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2024-11-24 00:29:59,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:29:59,721 INFO L225 Difference]: With dead ends: 335 [2024-11-24 00:29:59,722 INFO L226 Difference]: Without dead ends: 218 [2024-11-24 00:29:59,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-24 00:29:59,724 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 66 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:29:59,725 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 563 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 00:29:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-24 00:29:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 174. [2024-11-24 00:29:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 160 states have (on average 1.29375) internal successors, (207), 165 states have internal predecessors, (207), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:29:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 224 transitions. [2024-11-24 00:29:59,763 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 224 transitions. Word has length 45 [2024-11-24 00:29:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:29:59,763 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 224 transitions. [2024-11-24 00:29:59,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:29:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 224 transitions. [2024-11-24 00:29:59,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-24 00:29:59,765 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:29:59,765 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:29:59,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-24 00:29:59,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-24 00:29:59,965 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:29:59,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:29:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash -839027414, now seen corresponding path program 1 times [2024-11-24 00:29:59,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:29:59,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872152380] [2024-11-24 00:29:59,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:29:59,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:30:00,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:00,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872152380] [2024-11-24 00:30:00,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872152380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:00,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393332011] [2024-11-24 00:30:00,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:00,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:00,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:00,770 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:00,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 00:30:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:00,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-24 00:30:00,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:00,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:30:01,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:30:01,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-24 00:30:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:30:01,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:01,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:30:01,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2024-11-24 00:30:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:30:01,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393332011] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:01,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:01,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 32 [2024-11-24 00:30:01,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640888597] [2024-11-24 00:30:01,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:01,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-24 00:30:01,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:01,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-24 00:30:01,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2024-11-24 00:30:01,765 INFO L87 Difference]: Start difference. First operand 174 states and 224 transitions. Second operand has 32 states, 31 states have (on average 2.967741935483871) internal successors, (92), 31 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:02,973 INFO L93 Difference]: Finished difference Result 279 states and 362 transitions. [2024-11-24 00:30:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-24 00:30:02,976 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.967741935483871) internal successors, (92), 31 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-11-24 00:30:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:02,977 INFO L225 Difference]: With dead ends: 279 [2024-11-24 00:30:02,978 INFO L226 Difference]: Without dead ends: 243 [2024-11-24 00:30:02,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2024-11-24 00:30:02,980 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 219 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:02,981 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 1089 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-24 00:30:02,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-11-24 00:30:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 187. [2024-11-24 00:30:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 173 states have (on average 1.2947976878612717) internal successors, (224), 178 states have internal predecessors, (224), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:30:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 241 transitions. [2024-11-24 00:30:03,017 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 241 transitions. Word has length 46 [2024-11-24 00:30:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:03,018 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 241 transitions. [2024-11-24 00:30:03,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.967741935483871) internal successors, (92), 31 states have internal predecessors, (92), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 241 transitions. [2024-11-24 00:30:03,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-24 00:30:03,019 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:03,019 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:03,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 00:30:03,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-24 00:30:03,223 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:03,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1517238742, now seen corresponding path program 1 times [2024-11-24 00:30:03,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:03,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297371604] [2024-11-24 00:30:03,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:03,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:30:03,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:03,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297371604] [2024-11-24 00:30:03,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297371604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:03,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353499864] [2024-11-24 00:30:03,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:03,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:03,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:03,455 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:03,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 00:30:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:03,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-24 00:30:03,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:30:03,732 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:30:03,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353499864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:03,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:03,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2024-11-24 00:30:03,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978714901] [2024-11-24 00:30:03,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:03,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 00:30:03,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:03,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 00:30:03,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-24 00:30:03,921 INFO L87 Difference]: Start difference. First operand 187 states and 241 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:04,321 INFO L93 Difference]: Finished difference Result 288 states and 383 transitions. [2024-11-24 00:30:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 00:30:04,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-11-24 00:30:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:04,323 INFO L225 Difference]: With dead ends: 288 [2024-11-24 00:30:04,323 INFO L226 Difference]: Without dead ends: 262 [2024-11-24 00:30:04,324 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-11-24 00:30:04,324 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 96 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:04,325 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 739 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 00:30:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-24 00:30:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 210. [2024-11-24 00:30:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 195 states have (on average 1.2820512820512822) internal successors, (250), 200 states have internal predecessors, (250), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-24 00:30:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 269 transitions. [2024-11-24 00:30:04,358 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 269 transitions. Word has length 46 [2024-11-24 00:30:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:04,359 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 269 transitions. [2024-11-24 00:30:04,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 269 transitions. [2024-11-24 00:30:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-24 00:30:04,360 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:04,360 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:04,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-24 00:30:04,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:04,561 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:04,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:04,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1830714154, now seen corresponding path program 2 times [2024-11-24 00:30:04,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:04,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770705480] [2024-11-24 00:30:04,562 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:30:04,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:04,619 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:30:04,619 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:30:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:30:05,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:05,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770705480] [2024-11-24 00:30:05,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770705480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:05,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981974245] [2024-11-24 00:30:05,560 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:30:05,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:05,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:05,562 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:05,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 00:30:05,670 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:30:05,670 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:30:05,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:30:05,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:30:05,891 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:30:06,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981974245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:06,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:06,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 25 [2024-11-24 00:30:06,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308005159] [2024-11-24 00:30:06,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:06,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 00:30:06,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:06,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 00:30:06,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2024-11-24 00:30:06,160 INFO L87 Difference]: Start difference. First operand 210 states and 269 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:08,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:08,794 INFO L93 Difference]: Finished difference Result 444 states and 590 transitions. [2024-11-24 00:30:08,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-24 00:30:08,795 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2024-11-24 00:30:08,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:08,797 INFO L225 Difference]: With dead ends: 444 [2024-11-24 00:30:08,797 INFO L226 Difference]: Without dead ends: 368 [2024-11-24 00:30:08,798 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2024-11-24 00:30:08,799 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 200 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:08,799 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1903 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-24 00:30:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-11-24 00:30:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 219. [2024-11-24 00:30:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 204 states have (on average 1.2794117647058822) internal successors, (261), 209 states have internal predecessors, (261), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-24 00:30:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 280 transitions. [2024-11-24 00:30:08,840 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 280 transitions. Word has length 47 [2024-11-24 00:30:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:08,840 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 280 transitions. [2024-11-24 00:30:08,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 280 transitions. [2024-11-24 00:30:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-24 00:30:08,842 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:08,842 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:08,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-24 00:30:09,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:09,042 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:09,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:09,043 INFO L85 PathProgramCache]: Analyzing trace with hash 276731014, now seen corresponding path program 1 times [2024-11-24 00:30:09,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:09,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230483668] [2024-11-24 00:30:09,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:09,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:30:09,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:09,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230483668] [2024-11-24 00:30:09,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230483668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:30:09,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:30:09,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:30:09,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142702199] [2024-11-24 00:30:09,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:30:09,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:30:09,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:09,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:30:09,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:30:09,105 INFO L87 Difference]: Start difference. First operand 219 states and 280 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:30:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:09,167 INFO L93 Difference]: Finished difference Result 239 states and 304 transitions. [2024-11-24 00:30:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:30:09,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-24 00:30:09,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:09,170 INFO L225 Difference]: With dead ends: 239 [2024-11-24 00:30:09,170 INFO L226 Difference]: Without dead ends: 220 [2024-11-24 00:30:09,171 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:30:09,172 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:09,172 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 119 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:30:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-24 00:30:09,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2024-11-24 00:30:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 203 states have (on average 1.270935960591133) internal successors, (258), 207 states have internal predecessors, (258), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-24 00:30:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 277 transitions. [2024-11-24 00:30:09,212 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 277 transitions. Word has length 48 [2024-11-24 00:30:09,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:09,212 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 277 transitions. [2024-11-24 00:30:09,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:30:09,212 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 277 transitions. [2024-11-24 00:30:09,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-24 00:30:09,214 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:09,214 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:09,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-24 00:30:09,214 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:09,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:09,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1259513722, now seen corresponding path program 2 times [2024-11-24 00:30:09,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:09,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697478821] [2024-11-24 00:30:09,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:30:09,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:09,233 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 00:30:09,233 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:30:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:30:09,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:09,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697478821] [2024-11-24 00:30:09,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697478821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:30:09,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:30:09,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:30:09,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164901047] [2024-11-24 00:30:09,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:30:09,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:30:09,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:09,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:30:09,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:30:09,377 INFO L87 Difference]: Start difference. First operand 218 states and 277 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:09,489 INFO L93 Difference]: Finished difference Result 280 states and 352 transitions. [2024-11-24 00:30:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:30:09,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2024-11-24 00:30:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:09,492 INFO L225 Difference]: With dead ends: 280 [2024-11-24 00:30:09,492 INFO L226 Difference]: Without dead ends: 271 [2024-11-24 00:30:09,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:30:09,493 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:09,494 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 174 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:30:09,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-11-24 00:30:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 225. [2024-11-24 00:30:09,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 210 states have (on average 1.2571428571428571) internal successors, (264), 214 states have internal predecessors, (264), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-24 00:30:09,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 283 transitions. [2024-11-24 00:30:09,534 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 283 transitions. Word has length 48 [2024-11-24 00:30:09,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:09,534 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 283 transitions. [2024-11-24 00:30:09,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:09,534 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 283 transitions. [2024-11-24 00:30:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-24 00:30:09,535 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:09,535 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:09,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-24 00:30:09,536 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:09,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1866805766, now seen corresponding path program 1 times [2024-11-24 00:30:09,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:09,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337609580] [2024-11-24 00:30:09,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:09,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:30:09,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:09,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337609580] [2024-11-24 00:30:09,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337609580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:09,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587161677] [2024-11-24 00:30:09,743 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:09,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:09,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:09,745 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:09,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 00:30:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:09,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 00:30:09,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-24 00:30:09,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-24 00:30:10,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587161677] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:10,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:10,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-24 00:30:10,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822949637] [2024-11-24 00:30:10,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:10,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 00:30:10,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:10,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 00:30:10,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-24 00:30:10,127 INFO L87 Difference]: Start difference. First operand 225 states and 283 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-24 00:30:10,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:10,443 INFO L93 Difference]: Finished difference Result 265 states and 335 transitions. [2024-11-24 00:30:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 00:30:10,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 51 [2024-11-24 00:30:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:10,445 INFO L225 Difference]: With dead ends: 265 [2024-11-24 00:30:10,446 INFO L226 Difference]: Without dead ends: 199 [2024-11-24 00:30:10,446 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-24 00:30:10,447 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 20 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:10,447 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 526 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:30:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-11-24 00:30:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 191. [2024-11-24 00:30:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 178 states have (on average 1.2696629213483146) internal successors, (226), 181 states have internal predecessors, (226), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:30:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 243 transitions. [2024-11-24 00:30:10,483 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 243 transitions. Word has length 51 [2024-11-24 00:30:10,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:10,483 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 243 transitions. [2024-11-24 00:30:10,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-24 00:30:10,484 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 243 transitions. [2024-11-24 00:30:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-24 00:30:10,484 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:10,485 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:10,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-24 00:30:10,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:10,690 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:10,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:10,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2085967808, now seen corresponding path program 1 times [2024-11-24 00:30:10,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:10,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834765461] [2024-11-24 00:30:10,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:10,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-24 00:30:10,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:10,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834765461] [2024-11-24 00:30:10,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834765461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:10,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821366277] [2024-11-24 00:30:10,862 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:10,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:10,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:10,866 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:10,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-24 00:30:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:10,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:30:10,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:30:11,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:30:11,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821366277] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:11,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:11,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-11-24 00:30:11,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294023838] [2024-11-24 00:30:11,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:11,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-24 00:30:11,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:11,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-24 00:30:11,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2024-11-24 00:30:11,283 INFO L87 Difference]: Start difference. First operand 191 states and 243 transitions. Second operand has 18 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:11,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:11,809 INFO L93 Difference]: Finished difference Result 292 states and 374 transitions. [2024-11-24 00:30:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 00:30:11,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2024-11-24 00:30:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:11,812 INFO L225 Difference]: With dead ends: 292 [2024-11-24 00:30:11,812 INFO L226 Difference]: Without dead ends: 255 [2024-11-24 00:30:11,812 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-11-24 00:30:11,813 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 38 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:11,813 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 953 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 00:30:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-24 00:30:11,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 203. [2024-11-24 00:30:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 190 states have (on average 1.2789473684210526) internal successors, (243), 193 states have internal predecessors, (243), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:30:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2024-11-24 00:30:11,865 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 260 transitions. Word has length 50 [2024-11-24 00:30:11,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:11,866 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 260 transitions. [2024-11-24 00:30:11,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 260 transitions. [2024-11-24 00:30:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-24 00:30:11,867 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:11,867 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:11,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-24 00:30:12,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-24 00:30:12,068 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:12,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:12,069 INFO L85 PathProgramCache]: Analyzing trace with hash 193504478, now seen corresponding path program 3 times [2024-11-24 00:30:12,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:12,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380131952] [2024-11-24 00:30:12,069 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:30:12,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:12,110 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 00:30:12,110 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:30:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-24 00:30:12,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:12,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380131952] [2024-11-24 00:30:12,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380131952] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:12,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695830792] [2024-11-24 00:30:12,522 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:30:12,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:12,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:12,524 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:12,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 00:30:12,641 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 00:30:12,641 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:30:12,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 00:30:12,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-24 00:30:12,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-24 00:30:13,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695830792] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:13,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:13,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2024-11-24 00:30:13,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584578280] [2024-11-24 00:30:13,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:13,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-24 00:30:13,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:13,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-24 00:30:13,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-11-24 00:30:13,063 INFO L87 Difference]: Start difference. First operand 203 states and 260 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:13,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:13,974 INFO L93 Difference]: Finished difference Result 357 states and 468 transitions. [2024-11-24 00:30:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-24 00:30:13,975 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2024-11-24 00:30:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:13,982 INFO L225 Difference]: With dead ends: 357 [2024-11-24 00:30:13,982 INFO L226 Difference]: Without dead ends: 348 [2024-11-24 00:30:13,983 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2024-11-24 00:30:13,983 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 194 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:13,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 698 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-24 00:30:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-11-24 00:30:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 196. [2024-11-24 00:30:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 183 states have (on average 1.284153005464481) internal successors, (235), 186 states have internal predecessors, (235), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-24 00:30:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 252 transitions. [2024-11-24 00:30:14,056 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 252 transitions. Word has length 51 [2024-11-24 00:30:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:14,056 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 252 transitions. [2024-11-24 00:30:14,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 252 transitions. [2024-11-24 00:30:14,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-24 00:30:14,058 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:14,058 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:14,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-24 00:30:14,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-24 00:30:14,262 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:14,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:14,263 INFO L85 PathProgramCache]: Analyzing trace with hash 40741697, now seen corresponding path program 1 times [2024-11-24 00:30:14,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:14,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688963537] [2024-11-24 00:30:14,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:14,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-24 00:30:14,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:14,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688963537] [2024-11-24 00:30:14,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688963537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:14,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038545898] [2024-11-24 00:30:14,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:14,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:14,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:14,495 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:14,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-24 00:30:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:14,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:30:14,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-24 00:30:14,728 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-24 00:30:14,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038545898] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:14,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:14,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2024-11-24 00:30:14,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156669764] [2024-11-24 00:30:14,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:14,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-24 00:30:14,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:14,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-24 00:30:14,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-24 00:30:14,862 INFO L87 Difference]: Start difference. First operand 196 states and 252 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:30:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:15,163 INFO L93 Difference]: Finished difference Result 244 states and 314 transitions. [2024-11-24 00:30:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-24 00:30:15,164 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2024-11-24 00:30:15,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:15,165 INFO L225 Difference]: With dead ends: 244 [2024-11-24 00:30:15,165 INFO L226 Difference]: Without dead ends: 184 [2024-11-24 00:30:15,165 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-24 00:30:15,166 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 44 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:15,166 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 473 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:30:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-24 00:30:15,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2024-11-24 00:30:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 169 states have (on average 1.2840236686390532) internal successors, (217), 172 states have internal predecessors, (217), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-24 00:30:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 232 transitions. [2024-11-24 00:30:15,195 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 232 transitions. Word has length 54 [2024-11-24 00:30:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:15,196 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 232 transitions. [2024-11-24 00:30:15,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:30:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 232 transitions. [2024-11-24 00:30:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-24 00:30:15,196 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:15,196 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:15,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-24 00:30:15,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-24 00:30:15,399 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:15,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:15,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1888891948, now seen corresponding path program 1 times [2024-11-24 00:30:15,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:15,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213925903] [2024-11-24 00:30:15,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:15,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:30:16,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:16,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213925903] [2024-11-24 00:30:16,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213925903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:16,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326282142] [2024-11-24 00:30:16,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:16,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:16,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:16,759 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:16,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-24 00:30:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:16,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-24 00:30:16,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:17,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:30:17,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:30:17,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-24 00:30:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:30:17,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:18,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:30:18,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2024-11-24 00:30:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-24 00:30:18,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326282142] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:18,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:18,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 12] total 36 [2024-11-24 00:30:18,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385634030] [2024-11-24 00:30:18,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:18,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-24 00:30:18,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:18,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-24 00:30:18,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2024-11-24 00:30:18,384 INFO L87 Difference]: Start difference. First operand 181 states and 232 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:30:19,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:19,857 INFO L93 Difference]: Finished difference Result 308 states and 391 transitions. [2024-11-24 00:30:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-24 00:30:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2024-11-24 00:30:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:19,860 INFO L225 Difference]: With dead ends: 308 [2024-11-24 00:30:19,860 INFO L226 Difference]: Without dead ends: 217 [2024-11-24 00:30:19,862 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=274, Invalid=1982, Unknown=0, NotChecked=0, Total=2256 [2024-11-24 00:30:19,862 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 157 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:19,863 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 767 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-24 00:30:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-24 00:30:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 196. [2024-11-24 00:30:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 184 states have (on average 1.2717391304347827) internal successors, (234), 187 states have internal predecessors, (234), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-24 00:30:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 249 transitions. [2024-11-24 00:30:19,921 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 249 transitions. Word has length 53 [2024-11-24 00:30:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:19,922 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 249 transitions. [2024-11-24 00:30:19,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:30:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 249 transitions. [2024-11-24 00:30:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-24 00:30:19,923 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:19,923 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:19,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-24 00:30:20,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-24 00:30:20,124 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:20,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:20,124 INFO L85 PathProgramCache]: Analyzing trace with hash 937757768, now seen corresponding path program 1 times [2024-11-24 00:30:20,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:20,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113139094] [2024-11-24 00:30:20,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:20,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-24 00:30:20,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:20,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113139094] [2024-11-24 00:30:20,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113139094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:20,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810414733] [2024-11-24 00:30:20,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:20,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:20,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:20,493 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:20,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-24 00:30:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:20,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 00:30:20,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-24 00:30:20,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-24 00:30:21,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810414733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:21,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:21,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2024-11-24 00:30:21,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515813461] [2024-11-24 00:30:21,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:21,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-24 00:30:21,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:21,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-24 00:30:21,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-11-24 00:30:21,308 INFO L87 Difference]: Start difference. First operand 196 states and 249 transitions. Second operand has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:22,231 INFO L93 Difference]: Finished difference Result 744 states and 960 transitions. [2024-11-24 00:30:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-24 00:30:22,232 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2024-11-24 00:30:22,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:22,236 INFO L225 Difference]: With dead ends: 744 [2024-11-24 00:30:22,236 INFO L226 Difference]: Without dead ends: 649 [2024-11-24 00:30:22,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2024-11-24 00:30:22,238 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 140 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:22,239 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1187 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 00:30:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2024-11-24 00:30:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 284. [2024-11-24 00:30:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 272 states have (on average 1.275735294117647) internal successors, (347), 275 states have internal predecessors, (347), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-24 00:30:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 362 transitions. [2024-11-24 00:30:22,321 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 362 transitions. Word has length 54 [2024-11-24 00:30:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:22,321 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 362 transitions. [2024-11-24 00:30:22,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 23 states have internal predecessors, (107), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 362 transitions. [2024-11-24 00:30:22,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-24 00:30:22,322 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:22,322 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:22,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-24 00:30:22,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-24 00:30:22,523 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:22,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:22,523 INFO L85 PathProgramCache]: Analyzing trace with hash -519772897, now seen corresponding path program 1 times [2024-11-24 00:30:22,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:22,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827935164] [2024-11-24 00:30:22,524 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:22,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-24 00:30:23,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:23,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827935164] [2024-11-24 00:30:23,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827935164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:23,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896818457] [2024-11-24 00:30:23,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:23,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:23,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:23,005 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:23,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-24 00:30:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:23,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-24 00:30:23,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:30:23,818 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:30:24,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896818457] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:24,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:24,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 14] total 41 [2024-11-24 00:30:24,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516450137] [2024-11-24 00:30:24,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:24,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-24 00:30:24,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:24,494 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-24 00:30:24,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2024-11-24 00:30:24,495 INFO L87 Difference]: Start difference. First operand 284 states and 362 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-24 00:30:27,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:27,199 INFO L93 Difference]: Finished difference Result 631 states and 806 transitions. [2024-11-24 00:30:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-24 00:30:27,200 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2024-11-24 00:30:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:27,203 INFO L225 Difference]: With dead ends: 631 [2024-11-24 00:30:27,203 INFO L226 Difference]: Without dead ends: 591 [2024-11-24 00:30:27,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=731, Invalid=4671, Unknown=0, NotChecked=0, Total=5402 [2024-11-24 00:30:27,205 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 721 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:27,205 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1163 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-24 00:30:27,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2024-11-24 00:30:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 286. [2024-11-24 00:30:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 275 states have (on average 1.269090909090909) internal successors, (349), 277 states have internal predecessors, (349), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:30:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 362 transitions. [2024-11-24 00:30:27,278 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 362 transitions. Word has length 56 [2024-11-24 00:30:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:27,278 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 362 transitions. [2024-11-24 00:30:27,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-24 00:30:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 362 transitions. [2024-11-24 00:30:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-24 00:30:27,280 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:27,280 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:27,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-24 00:30:27,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-24 00:30:27,484 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:27,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:27,485 INFO L85 PathProgramCache]: Analyzing trace with hash -68689616, now seen corresponding path program 1 times [2024-11-24 00:30:27,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:27,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593155005] [2024-11-24 00:30:27,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:27,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:30:27,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593155005] [2024-11-24 00:30:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593155005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741031349] [2024-11-24 00:30:27,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:27,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:27,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:27,919 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:27,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-24 00:30:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:28,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-24 00:30:28,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:28,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:30:28,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-24 00:30:29,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-24 00:30:29,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-24 00:30:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:30:29,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-24 00:30:30,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741031349] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:30,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:30,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 11] total 38 [2024-11-24 00:30:30,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164408513] [2024-11-24 00:30:30,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:30,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-24 00:30:30,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:30,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-24 00:30:30,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2024-11-24 00:30:30,102 INFO L87 Difference]: Start difference. First operand 286 states and 362 transitions. Second operand has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 37 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:30:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:33,053 INFO L93 Difference]: Finished difference Result 747 states and 960 transitions. [2024-11-24 00:30:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-24 00:30:33,053 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 37 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2024-11-24 00:30:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:33,056 INFO L225 Difference]: With dead ends: 747 [2024-11-24 00:30:33,056 INFO L226 Difference]: Without dead ends: 570 [2024-11-24 00:30:33,057 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=512, Invalid=3520, Unknown=0, NotChecked=0, Total=4032 [2024-11-24 00:30:33,058 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 462 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 1931 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:33,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 1362 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1931 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-24 00:30:33,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2024-11-24 00:30:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 351. [2024-11-24 00:30:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 340 states have (on average 1.276470588235294) internal successors, (434), 342 states have internal predecessors, (434), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:30:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 447 transitions. [2024-11-24 00:30:33,163 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 447 transitions. Word has length 57 [2024-11-24 00:30:33,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:33,163 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 447 transitions. [2024-11-24 00:30:33,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 37 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:30:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 447 transitions. [2024-11-24 00:30:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-24 00:30:33,164 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:33,165 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:33,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-24 00:30:33,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:33,369 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:33,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:33,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1157266304, now seen corresponding path program 2 times [2024-11-24 00:30:33,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:33,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378612029] [2024-11-24 00:30:33,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:30:33,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:33,404 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:30:33,404 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:30:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:30:33,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:33,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378612029] [2024-11-24 00:30:33,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378612029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:33,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803218513] [2024-11-24 00:30:33,986 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:30:33,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:33,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:33,988 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:33,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-24 00:30:34,130 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:30:34,130 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:30:34,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-24 00:30:34,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:30:34,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-24 00:30:34,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803218513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:34,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:34,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 30 [2024-11-24 00:30:34,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665568313] [2024-11-24 00:30:34,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:34,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-24 00:30:34,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:34,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-24 00:30:34,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2024-11-24 00:30:34,908 INFO L87 Difference]: Start difference. First operand 351 states and 447 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:45,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:45,414 INFO L93 Difference]: Finished difference Result 623 states and 789 transitions. [2024-11-24 00:30:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-24 00:30:45,414 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2024-11-24 00:30:45,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:45,416 INFO L225 Difference]: With dead ends: 623 [2024-11-24 00:30:45,416 INFO L226 Difference]: Without dead ends: 536 [2024-11-24 00:30:45,417 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=347, Invalid=2959, Unknown=0, NotChecked=0, Total=3306 [2024-11-24 00:30:45,418 INFO L435 NwaCegarLoop]: 135 mSDtfsCounter, 191 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 2721 SdHoareTripleChecker+Invalid, 2042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:45,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 2721 Invalid, 2042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-24 00:30:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2024-11-24 00:30:45,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 367. [2024-11-24 00:30:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 356 states have (on average 1.2556179775280898) internal successors, (447), 358 states have internal predecessors, (447), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:30:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 460 transitions. [2024-11-24 00:30:45,545 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 460 transitions. Word has length 58 [2024-11-24 00:30:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:45,546 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 460 transitions. [2024-11-24 00:30:45,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 460 transitions. [2024-11-24 00:30:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-24 00:30:45,547 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:45,547 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:45,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-24 00:30:45,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-24 00:30:45,748 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:45,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:45,749 INFO L85 PathProgramCache]: Analyzing trace with hash -857342441, now seen corresponding path program 2 times [2024-11-24 00:30:45,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:45,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810385399] [2024-11-24 00:30:45,749 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:30:45,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:45,783 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:30:45,783 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:30:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:30:46,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:46,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810385399] [2024-11-24 00:30:46,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810385399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:46,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2953076] [2024-11-24 00:30:46,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:30:46,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:46,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:46,379 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:46,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-24 00:30:46,568 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:30:46,568 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:30:46,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-24 00:30:46,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-24 00:30:47,033 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-24 00:30:47,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2953076] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:47,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:47,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 9] total 35 [2024-11-24 00:30:47,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590147285] [2024-11-24 00:30:47,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:47,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-24 00:30:47,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:47,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-24 00:30:47,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2024-11-24 00:30:47,419 INFO L87 Difference]: Start difference. First operand 367 states and 460 transitions. Second operand has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-24 00:30:49,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:49,845 INFO L93 Difference]: Finished difference Result 906 states and 1143 transitions. [2024-11-24 00:30:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-24 00:30:49,846 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 60 [2024-11-24 00:30:49,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:49,850 INFO L225 Difference]: With dead ends: 906 [2024-11-24 00:30:49,850 INFO L226 Difference]: Without dead ends: 866 [2024-11-24 00:30:49,851 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=398, Invalid=2572, Unknown=0, NotChecked=0, Total=2970 [2024-11-24 00:30:49,852 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 580 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:49,852 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 1253 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-24 00:30:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2024-11-24 00:30:49,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 387. [2024-11-24 00:30:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 376 states have (on average 1.2340425531914894) internal successors, (464), 378 states have internal predecessors, (464), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:30:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 477 transitions. [2024-11-24 00:30:49,982 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 477 transitions. Word has length 60 [2024-11-24 00:30:49,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:49,982 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 477 transitions. [2024-11-24 00:30:49,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 35 states have internal predecessors, (93), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-24 00:30:49,983 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 477 transitions. [2024-11-24 00:30:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-24 00:30:49,984 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:49,984 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:49,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-24 00:30:50,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-24 00:30:50,185 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:50,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1485136976, now seen corresponding path program 2 times [2024-11-24 00:30:50,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:50,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077879412] [2024-11-24 00:30:50,186 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:30:50,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:50,212 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:30:50,212 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:30:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-24 00:30:50,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:50,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077879412] [2024-11-24 00:30:50,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077879412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:50,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681117275] [2024-11-24 00:30:50,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:30:50,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:50,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:50,439 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:50,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-24 00:30:50,643 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:30:50,643 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:30:50,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-24 00:30:50,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:30:51,030 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:30:51,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681117275] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:51,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:51,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 24 [2024-11-24 00:30:51,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839738556] [2024-11-24 00:30:51,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:51,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-24 00:30:51,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:51,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-24 00:30:51,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2024-11-24 00:30:51,476 INFO L87 Difference]: Start difference. First operand 387 states and 477 transitions. Second operand has 24 states, 23 states have (on average 4.391304347826087) internal successors, (101), 23 states have internal predecessors, (101), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:52,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:30:52,566 INFO L93 Difference]: Finished difference Result 514 states and 629 transitions. [2024-11-24 00:30:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-24 00:30:52,567 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.391304347826087) internal successors, (101), 23 states have internal predecessors, (101), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2024-11-24 00:30:52,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:30:52,569 INFO L225 Difference]: With dead ends: 514 [2024-11-24 00:30:52,569 INFO L226 Difference]: Without dead ends: 389 [2024-11-24 00:30:52,570 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2024-11-24 00:30:52,570 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 47 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:30:52,571 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1262 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-24 00:30:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2024-11-24 00:30:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 348. [2024-11-24 00:30:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 337 states have (on average 1.2492581602373887) internal successors, (421), 339 states have internal predecessors, (421), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:30:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 434 transitions. [2024-11-24 00:30:52,720 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 434 transitions. Word has length 58 [2024-11-24 00:30:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:30:52,720 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 434 transitions. [2024-11-24 00:30:52,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.391304347826087) internal successors, (101), 23 states have internal predecessors, (101), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:30:52,721 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 434 transitions. [2024-11-24 00:30:52,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-24 00:30:52,723 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:30:52,724 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:30:52,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-24 00:30:52,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-24 00:30:52,928 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:30:52,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:30:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2108111227, now seen corresponding path program 1 times [2024-11-24 00:30:52,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:30:52,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641569394] [2024-11-24 00:30:52,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:52,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:30:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:30:53,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:30:53,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641569394] [2024-11-24 00:30:53,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641569394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:30:53,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30688634] [2024-11-24 00:30:53,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:30:53,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:30:53,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:30:53,825 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:30:53,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-24 00:30:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:30:53,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-24 00:30:53,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:30:58,403 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1| Int)) (= (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_1|) 0) (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1|) 0))) is different from true [2024-11-24 00:30:58,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-24 00:30:58,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 00:30:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:30:58,862 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:30:59,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:30:59,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2024-11-24 00:30:59,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:30:59,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2024-11-24 00:30:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:30:59,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30688634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:30:59,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:30:59,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 10] total 33 [2024-11-24 00:30:59,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025589268] [2024-11-24 00:30:59,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:30:59,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-24 00:30:59,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:30:59,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-24 00:30:59,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=903, Unknown=1, NotChecked=60, Total=1056 [2024-11-24 00:30:59,402 INFO L87 Difference]: Start difference. First operand 348 states and 434 transitions. Second operand has 33 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 33 states have internal predecessors, (101), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-24 00:31:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:31:04,354 INFO L93 Difference]: Finished difference Result 770 states and 972 transitions. [2024-11-24 00:31:04,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-24 00:31:04,355 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 33 states have internal predecessors, (101), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 60 [2024-11-24 00:31:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:31:04,359 INFO L225 Difference]: With dead ends: 770 [2024-11-24 00:31:04,359 INFO L226 Difference]: Without dead ends: 734 [2024-11-24 00:31:04,361 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=585, Invalid=4248, Unknown=1, NotChecked=136, Total=4970 [2024-11-24 00:31:04,362 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 469 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 466 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:31:04,362 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 1092 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1167 Invalid, 0 Unknown, 466 Unchecked, 1.7s Time] [2024-11-24 00:31:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2024-11-24 00:31:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 366. [2024-11-24 00:31:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 353 states have (on average 1.2351274787535411) internal successors, (436), 355 states have internal predecessors, (436), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-24 00:31:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 451 transitions. [2024-11-24 00:31:04,546 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 451 transitions. Word has length 60 [2024-11-24 00:31:04,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:31:04,546 INFO L471 AbstractCegarLoop]: Abstraction has 366 states and 451 transitions. [2024-11-24 00:31:04,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 33 states have internal predecessors, (101), 6 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-24 00:31:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 451 transitions. [2024-11-24 00:31:04,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-24 00:31:04,548 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:31:04,548 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:31:04,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-24 00:31:04,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-24 00:31:04,750 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:31:04,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:31:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1712158208, now seen corresponding path program 1 times [2024-11-24 00:31:04,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:31:04,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466962910] [2024-11-24 00:31:04,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:31:04,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:31:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:31:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-24 00:31:05,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:31:05,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466962910] [2024-11-24 00:31:05,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466962910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:31:05,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454891345] [2024-11-24 00:31:05,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:31:05,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:31:05,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:31:05,626 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:31:05,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-24 00:31:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:31:05,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 00:31:05,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:31:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-24 00:31:06,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:31:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-24 00:31:06,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454891345] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:31:06,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:31:06,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 27 [2024-11-24 00:31:06,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456371164] [2024-11-24 00:31:06,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:31:06,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-24 00:31:06,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:31:06,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-24 00:31:06,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-11-24 00:31:06,975 INFO L87 Difference]: Start difference. First operand 366 states and 451 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:31:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:31:08,425 INFO L93 Difference]: Finished difference Result 437 states and 538 transitions. [2024-11-24 00:31:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-24 00:31:08,426 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 59 [2024-11-24 00:31:08,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:31:08,429 INFO L225 Difference]: With dead ends: 437 [2024-11-24 00:31:08,429 INFO L226 Difference]: Without dead ends: 428 [2024-11-24 00:31:08,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=255, Invalid=1637, Unknown=0, NotChecked=0, Total=1892 [2024-11-24 00:31:08,431 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 140 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:31:08,431 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 884 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-24 00:31:08,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2024-11-24 00:31:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 369. [2024-11-24 00:31:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 356 states have (on average 1.2275280898876404) internal successors, (437), 358 states have internal predecessors, (437), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-24 00:31:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 452 transitions. [2024-11-24 00:31:08,561 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 452 transitions. Word has length 59 [2024-11-24 00:31:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:31:08,562 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 452 transitions. [2024-11-24 00:31:08,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:31:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 452 transitions. [2024-11-24 00:31:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-24 00:31:08,564 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:31:08,564 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:31:08,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-24 00:31:08,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:31:08,768 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:31:08,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:31:08,769 INFO L85 PathProgramCache]: Analyzing trace with hash -425025710, now seen corresponding path program 1 times [2024-11-24 00:31:08,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:31:08,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043104722] [2024-11-24 00:31:08,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:31:08,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:31:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:31:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 00:31:09,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:31:09,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043104722] [2024-11-24 00:31:09,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043104722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:31:09,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110187717] [2024-11-24 00:31:09,254 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:31:09,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:31:09,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:31:09,257 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:31:09,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-24 00:31:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:31:09,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-24 00:31:09,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:31:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-24 00:31:10,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:31:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-24 00:31:10,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110187717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:31:10,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:31:10,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 15] total 36 [2024-11-24 00:31:10,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891667340] [2024-11-24 00:31:10,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:31:10,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-24 00:31:10,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:31:10,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-24 00:31:10,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2024-11-24 00:31:10,978 INFO L87 Difference]: Start difference. First operand 369 states and 452 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:31:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:31:12,615 INFO L93 Difference]: Finished difference Result 600 states and 736 transitions. [2024-11-24 00:31:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-24 00:31:12,615 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 59 [2024-11-24 00:31:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:31:12,617 INFO L225 Difference]: With dead ends: 600 [2024-11-24 00:31:12,617 INFO L226 Difference]: Without dead ends: 479 [2024-11-24 00:31:12,618 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=367, Invalid=1703, Unknown=0, NotChecked=0, Total=2070 [2024-11-24 00:31:12,619 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 582 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:31:12,619 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 1065 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-24 00:31:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2024-11-24 00:31:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 379. [2024-11-24 00:31:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 366 states have (on average 1.226775956284153) internal successors, (449), 368 states have internal predecessors, (449), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-24 00:31:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 464 transitions. [2024-11-24 00:31:12,773 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 464 transitions. Word has length 59 [2024-11-24 00:31:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:31:12,773 INFO L471 AbstractCegarLoop]: Abstraction has 379 states and 464 transitions. [2024-11-24 00:31:12,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:31:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 464 transitions. [2024-11-24 00:31:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-24 00:31:12,775 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:31:12,775 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:31:12,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-24 00:31:12,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-24 00:31:12,979 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:31:12,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:31:12,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1671498038, now seen corresponding path program 2 times [2024-11-24 00:31:12,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:31:12,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503345524] [2024-11-24 00:31:12,980 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:31:12,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:31:13,034 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:31:13,034 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:31:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:31:13,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:31:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503345524] [2024-11-24 00:31:13,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503345524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:31:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141516387] [2024-11-24 00:31:13,848 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:31:13,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:31:13,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:31:13,853 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:31:13,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-24 00:31:14,027 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:31:14,027 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:31:14,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-24 00:31:14,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:31:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-24 00:31:14,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:31:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-24 00:31:15,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141516387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:31:15,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:31:15,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 36 [2024-11-24 00:31:15,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752555950] [2024-11-24 00:31:15,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:31:15,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-24 00:31:15,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:31:15,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-24 00:31:15,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2024-11-24 00:31:15,496 INFO L87 Difference]: Start difference. First operand 379 states and 464 transitions. Second operand has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:31:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:31:18,209 INFO L93 Difference]: Finished difference Result 942 states and 1181 transitions. [2024-11-24 00:31:18,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-24 00:31:18,210 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2024-11-24 00:31:18,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:31:18,213 INFO L225 Difference]: With dead ends: 942 [2024-11-24 00:31:18,213 INFO L226 Difference]: Without dead ends: 929 [2024-11-24 00:31:18,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=393, Invalid=2799, Unknown=0, NotChecked=0, Total=3192 [2024-11-24 00:31:18,217 INFO L435 NwaCegarLoop]: 107 mSDtfsCounter, 187 mSDsluCounter, 1546 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:31:18,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1653 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-24 00:31:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2024-11-24 00:31:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 399. [2024-11-24 00:31:18,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 386 states have (on average 1.2279792746113989) internal successors, (474), 388 states have internal predecessors, (474), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-24 00:31:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 489 transitions. [2024-11-24 00:31:18,398 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 489 transitions. Word has length 61 [2024-11-24 00:31:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:31:18,399 INFO L471 AbstractCegarLoop]: Abstraction has 399 states and 489 transitions. [2024-11-24 00:31:18,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:31:18,399 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 489 transitions. [2024-11-24 00:31:18,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-24 00:31:18,401 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:31:18,401 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:31:18,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-24 00:31:18,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-24 00:31:18,602 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:31:18,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:31:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1462146061, now seen corresponding path program 1 times [2024-11-24 00:31:18,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:31:18,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784102204] [2024-11-24 00:31:18,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:31:18,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:31:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:31:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-24 00:31:19,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:31:19,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784102204] [2024-11-24 00:31:19,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784102204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:31:19,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441038976] [2024-11-24 00:31:19,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:31:19,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:31:19,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:31:19,712 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:31:19,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-24 00:31:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:31:20,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-24 00:31:20,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:31:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:31:21,086 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:31:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-24 00:31:22,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441038976] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:31:22,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:31:22,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 16] total 52 [2024-11-24 00:31:22,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131678053] [2024-11-24 00:31:22,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:31:22,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-24 00:31:22,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:31:22,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-24 00:31:22,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2406, Unknown=0, NotChecked=0, Total=2652 [2024-11-24 00:31:22,518 INFO L87 Difference]: Start difference. First operand 399 states and 489 transitions. Second operand has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 51 states have internal predecessors, (116), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-24 00:31:30,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-24 00:31:34,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:31:34,086 INFO L93 Difference]: Finished difference Result 647 states and 792 transitions. [2024-11-24 00:31:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-24 00:31:34,088 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 51 states have internal predecessors, (116), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 65 [2024-11-24 00:31:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:31:34,091 INFO L225 Difference]: With dead ends: 647 [2024-11-24 00:31:34,091 INFO L226 Difference]: Without dead ends: 518 [2024-11-24 00:31:34,096 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2598 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1489, Invalid=8813, Unknown=0, NotChecked=0, Total=10302 [2024-11-24 00:31:34,096 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 661 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 2821 mSolverCounterSat, 91 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1927 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2821 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:31:34,097 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 1927 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2821 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2024-11-24 00:31:34,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2024-11-24 00:31:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 398. [2024-11-24 00:31:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 382 states have (on average 1.2146596858638743) internal successors, (464), 385 states have internal predecessors, (464), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-24 00:31:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 485 transitions. [2024-11-24 00:31:34,265 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 485 transitions. Word has length 65 [2024-11-24 00:31:34,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:31:34,266 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 485 transitions. [2024-11-24 00:31:34,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 51 states have internal predecessors, (116), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-24 00:31:34,266 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 485 transitions. [2024-11-24 00:31:34,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-24 00:31:34,267 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:31:34,268 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:31:34,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-24 00:31:34,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-24 00:31:34,468 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:31:34,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:31:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2094815019, now seen corresponding path program 1 times [2024-11-24 00:31:34,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:31:34,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952014307] [2024-11-24 00:31:34,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:31:34,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:31:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:31:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-24 00:31:35,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:31:35,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952014307] [2024-11-24 00:31:35,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952014307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:31:35,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831352510] [2024-11-24 00:31:35,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:31:35,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:31:35,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:31:35,668 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:31:35,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-24 00:31:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:31:35,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-24 00:31:35,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:31:35,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:31:36,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-24 00:31:36,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 00:31:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:31:36,699 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:31:36,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:31:36,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2024-11-24 00:31:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-24 00:31:37,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831352510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:31:37,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:31:37,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 13] total 29 [2024-11-24 00:31:37,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392285889] [2024-11-24 00:31:37,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:31:37,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-24 00:31:37,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:31:37,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-24 00:31:37,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-24 00:31:37,208 INFO L87 Difference]: Start difference. First operand 398 states and 485 transitions. Second operand has 29 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-24 00:31:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:31:38,799 INFO L93 Difference]: Finished difference Result 689 states and 857 transitions. [2024-11-24 00:31:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-24 00:31:38,800 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 65 [2024-11-24 00:31:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:31:38,802 INFO L225 Difference]: With dead ends: 689 [2024-11-24 00:31:38,802 INFO L226 Difference]: Without dead ends: 550 [2024-11-24 00:31:38,803 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2024-11-24 00:31:38,803 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 135 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:31:38,804 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1324 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-24 00:31:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2024-11-24 00:31:39,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 517. [2024-11-24 00:31:39,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 490 states have (on average 1.226530612244898) internal successors, (601), 497 states have internal predecessors, (601), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-24 00:31:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 637 transitions. [2024-11-24 00:31:39,089 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 637 transitions. Word has length 65 [2024-11-24 00:31:39,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:31:39,090 INFO L471 AbstractCegarLoop]: Abstraction has 517 states and 637 transitions. [2024-11-24 00:31:39,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-24 00:31:39,090 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 637 transitions. [2024-11-24 00:31:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-24 00:31:39,092 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:31:39,093 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:31:39,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-24 00:31:39,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:31:39,294 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:31:39,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:31:39,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1825598896, now seen corresponding path program 3 times [2024-11-24 00:31:39,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:31:39,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629453535] [2024-11-24 00:31:39,294 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:31:39,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:31:39,442 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-24 00:31:39,442 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:31:56,490 WARN L286 SmtUtils]: Spent 9.11s on a formula simplification. DAG size of input: 76 DAG size of output: 76 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:32:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-24 00:32:08,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:32:08,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629453535] [2024-11-24 00:32:08,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629453535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:32:08,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471403048] [2024-11-24 00:32:08,548 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:32:08,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:32:08,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:32:08,551 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:32:08,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-24 00:32:08,985 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-24 00:32:08,985 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:32:08,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-24 00:32:08,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:32:09,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:32:09,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:32:09,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-24 00:32:11,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:32:11,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-24 00:32:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:32:11,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:32:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-24 00:32:14,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471403048] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:32:14,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:32:14,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 23, 18] total 66 [2024-11-24 00:32:14,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544697016] [2024-11-24 00:32:14,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:32:14,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-24 00:32:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:32:14,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-24 00:32:14,234 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3977, Unknown=0, NotChecked=0, Total=4290 [2024-11-24 00:32:14,234 INFO L87 Difference]: Start difference. First operand 517 states and 637 transitions. Second operand has 66 states, 65 states have (on average 2.276923076923077) internal successors, (148), 63 states have internal predecessors, (148), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-24 00:32:29,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-24 00:32:48,298 WARN L286 SmtUtils]: Spent 17.01s on a formula simplification. DAG size of input: 122 DAG size of output: 106 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:33:01,864 WARN L286 SmtUtils]: Spent 12.65s on a formula simplification. DAG size of input: 141 DAG size of output: 113 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:33:07,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-24 00:33:11,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-24 00:33:15,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-24 00:33:19,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-24 00:33:22,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-24 00:33:25,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-24 00:33:42,371 WARN L286 SmtUtils]: Spent 9.06s on a formula simplification. DAG size of input: 118 DAG size of output: 104 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:33:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:33:45,729 INFO L93 Difference]: Finished difference Result 879 states and 1093 transitions. [2024-11-24 00:33:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-24 00:33:45,729 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.276923076923077) internal successors, (148), 63 states have internal predecessors, (148), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2024-11-24 00:33:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:33:45,732 INFO L225 Difference]: With dead ends: 879 [2024-11-24 00:33:45,732 INFO L226 Difference]: Without dead ends: 726 [2024-11-24 00:33:45,734 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4364 ImplicationChecksByTransitivity, 80.3s TimeCoverageRelationStatistics Valid=1866, Invalid=16224, Unknown=0, NotChecked=0, Total=18090 [2024-11-24 00:33:45,734 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 678 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 3331 mSolverCounterSat, 51 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3331 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.9s IncrementalHoareTripleChecker+Time [2024-11-24 00:33:45,734 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1420 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3331 Invalid, 4 Unknown, 0 Unchecked, 31.9s Time] [2024-11-24 00:33:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2024-11-24 00:33:45,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 539. [2024-11-24 00:33:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 512 states have (on average 1.2265625) internal successors, (628), 519 states have internal predecessors, (628), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-24 00:33:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 664 transitions. [2024-11-24 00:33:45,948 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 664 transitions. Word has length 65 [2024-11-24 00:33:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:33:45,948 INFO L471 AbstractCegarLoop]: Abstraction has 539 states and 664 transitions. [2024-11-24 00:33:45,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.276923076923077) internal successors, (148), 63 states have internal predecessors, (148), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-24 00:33:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 664 transitions. [2024-11-24 00:33:45,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-24 00:33:45,950 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:33:45,950 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:33:45,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-24 00:33:46,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-24 00:33:46,151 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:33:46,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:33:46,152 INFO L85 PathProgramCache]: Analyzing trace with hash -824057008, now seen corresponding path program 4 times [2024-11-24 00:33:46,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:33:46,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611851683] [2024-11-24 00:33:46,152 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:33:46,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:33:46,220 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:33:46,220 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:33:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-24 00:33:47,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:33:47,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611851683] [2024-11-24 00:33:47,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611851683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:33:47,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249425905] [2024-11-24 00:33:47,297 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:33:47,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:33:47,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:33:47,299 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:33:47,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-24 00:33:47,523 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:33:47,523 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:33:47,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-24 00:33:47,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:33:49,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-24 00:33:49,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-24 00:33:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-24 00:33:49,676 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:33:51,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:33:51,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2024-11-24 00:33:51,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:33:51,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2024-11-24 00:33:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-24 00:33:52,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249425905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:33:52,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:33:52,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 18] total 50 [2024-11-24 00:33:52,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088645840] [2024-11-24 00:33:52,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:33:52,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-24 00:33:52,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:33:52,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-24 00:33:52,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2208, Unknown=0, NotChecked=0, Total=2450 [2024-11-24 00:33:52,122 INFO L87 Difference]: Start difference. First operand 539 states and 664 transitions. Second operand has 50 states, 49 states have (on average 2.795918367346939) internal successors, (137), 48 states have internal predecessors, (137), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:33:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:33:55,071 INFO L93 Difference]: Finished difference Result 675 states and 833 transitions. [2024-11-24 00:33:55,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-24 00:33:55,072 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.795918367346939) internal successors, (137), 48 states have internal predecessors, (137), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2024-11-24 00:33:55,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:33:55,075 INFO L225 Difference]: With dead ends: 675 [2024-11-24 00:33:55,076 INFO L226 Difference]: Without dead ends: 622 [2024-11-24 00:33:55,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=338, Invalid=2854, Unknown=0, NotChecked=0, Total=3192 [2024-11-24 00:33:55,081 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 171 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:33:55,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1021 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-24 00:33:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2024-11-24 00:33:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 547. [2024-11-24 00:33:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 520 states have (on average 1.226923076923077) internal successors, (638), 527 states have internal predecessors, (638), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-24 00:33:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 674 transitions. [2024-11-24 00:33:55,299 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 674 transitions. Word has length 65 [2024-11-24 00:33:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:33:55,299 INFO L471 AbstractCegarLoop]: Abstraction has 547 states and 674 transitions. [2024-11-24 00:33:55,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.795918367346939) internal successors, (137), 48 states have internal predecessors, (137), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:33:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 674 transitions. [2024-11-24 00:33:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-24 00:33:55,301 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:33:55,302 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:33:55,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-24 00:33:55,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:33:55,502 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:33:55,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:33:55,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1078306468, now seen corresponding path program 5 times [2024-11-24 00:33:55,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:33:55,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355386380] [2024-11-24 00:33:55,503 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:33:55,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:33:55,583 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-24 00:33:55,586 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:33:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-24 00:33:57,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:33:57,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355386380] [2024-11-24 00:33:57,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355386380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:33:57,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439574316] [2024-11-24 00:33:57,066 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:33:57,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:33:57,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:33:57,071 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:33:57,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-24 00:33:57,549 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-24 00:33:57,549 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:33:57,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-24 00:33:57,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:33:57,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-24 00:33:57,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 00:33:58,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-11-24 00:33:58,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-11-24 00:33:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:33:58,565 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:34:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-24 00:34:00,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439574316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:34:00,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:34:00,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 43 [2024-11-24 00:34:00,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232850397] [2024-11-24 00:34:00,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:34:00,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-24 00:34:00,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:34:00,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-24 00:34:00,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-11-24 00:34:00,193 INFO L87 Difference]: Start difference. First operand 547 states and 674 transitions. Second operand has 43 states, 43 states have (on average 2.7906976744186047) internal successors, (120), 42 states have internal predecessors, (120), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:34:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:34:02,289 INFO L93 Difference]: Finished difference Result 679 states and 840 transitions. [2024-11-24 00:34:02,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-24 00:34:02,290 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.7906976744186047) internal successors, (120), 42 states have internal predecessors, (120), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2024-11-24 00:34:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:34:02,292 INFO L225 Difference]: With dead ends: 679 [2024-11-24 00:34:02,292 INFO L226 Difference]: Without dead ends: 626 [2024-11-24 00:34:02,292 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2024-11-24 00:34:02,293 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 133 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:34:02,293 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 1357 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-24 00:34:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2024-11-24 00:34:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 583. [2024-11-24 00:34:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 556 states have (on average 1.2212230215827338) internal successors, (679), 563 states have internal predecessors, (679), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-24 00:34:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 715 transitions. [2024-11-24 00:34:02,589 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 715 transitions. Word has length 65 [2024-11-24 00:34:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:34:02,589 INFO L471 AbstractCegarLoop]: Abstraction has 583 states and 715 transitions. [2024-11-24 00:34:02,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.7906976744186047) internal successors, (120), 42 states have internal predecessors, (120), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:34:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 715 transitions. [2024-11-24 00:34:02,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-24 00:34:02,591 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:34:02,591 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:34:02,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-24 00:34:02,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:34:02,792 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:34:02,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:34:02,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1593089516, now seen corresponding path program 1 times [2024-11-24 00:34:02,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:34:02,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671643855] [2024-11-24 00:34:02,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:34:02,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:34:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:34:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-24 00:34:03,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:34:03,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671643855] [2024-11-24 00:34:03,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671643855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:34:03,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889207786] [2024-11-24 00:34:03,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:34:03,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:34:03,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:34:03,125 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:34:03,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-24 00:34:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:34:03,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-24 00:34:03,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:34:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:34:03,818 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:34:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-24 00:34:04,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889207786] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:34:04,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:34:04,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 11] total 30 [2024-11-24 00:34:04,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048311264] [2024-11-24 00:34:04,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:34:04,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-24 00:34:04,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:34:04,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-24 00:34:04,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2024-11-24 00:34:04,413 INFO L87 Difference]: Start difference. First operand 583 states and 715 transitions. Second operand has 30 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 29 states have internal predecessors, (115), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:34:06,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:34:06,687 INFO L93 Difference]: Finished difference Result 1298 states and 1605 transitions. [2024-11-24 00:34:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-24 00:34:06,687 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 29 states have internal predecessors, (115), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 67 [2024-11-24 00:34:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:34:06,692 INFO L225 Difference]: With dead ends: 1298 [2024-11-24 00:34:06,692 INFO L226 Difference]: Without dead ends: 958 [2024-11-24 00:34:06,693 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2024-11-24 00:34:06,693 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 74 mSDsluCounter, 1518 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:34:06,694 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1590 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-24 00:34:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2024-11-24 00:34:07,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 771. [2024-11-24 00:34:07,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 744 states have (on average 1.2163978494623655) internal successors, (905), 751 states have internal predecessors, (905), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-24 00:34:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 941 transitions. [2024-11-24 00:34:07,005 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 941 transitions. Word has length 67 [2024-11-24 00:34:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:34:07,005 INFO L471 AbstractCegarLoop]: Abstraction has 771 states and 941 transitions. [2024-11-24 00:34:07,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 29 states have internal predecessors, (115), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:34:07,005 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 941 transitions. [2024-11-24 00:34:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-24 00:34:07,007 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:34:07,008 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:34:07,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-24 00:34:07,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:34:07,210 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:34:07,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:34:07,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1040946772, now seen corresponding path program 2 times [2024-11-24 00:34:07,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:34:07,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942253276] [2024-11-24 00:34:07,211 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:34:07,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:34:07,286 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:34:07,287 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:34:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:34:08,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:34:08,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942253276] [2024-11-24 00:34:08,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942253276] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:34:08,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150918946] [2024-11-24 00:34:08,472 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:34:08,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:34:08,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:34:08,474 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:34:08,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-24 00:34:08,686 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:34:08,686 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:34:08,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-24 00:34:08,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:34:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 00:34:09,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:34:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:34:10,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150918946] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:34:10,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:34:10,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 12] total 34 [2024-11-24 00:34:10,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263398169] [2024-11-24 00:34:10,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:34:10,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-24 00:34:10,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:34:10,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-24 00:34:10,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2024-11-24 00:34:10,099 INFO L87 Difference]: Start difference. First operand 771 states and 941 transitions. Second operand has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:34:29,642 WARN L286 SmtUtils]: Spent 16.19s on a formula simplification. DAG size of input: 75 DAG size of output: 47 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:34:30,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:34:30,811 INFO L93 Difference]: Finished difference Result 1167 states and 1447 transitions. [2024-11-24 00:34:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-24 00:34:30,811 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 69 [2024-11-24 00:34:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:34:30,814 INFO L225 Difference]: With dead ends: 1167 [2024-11-24 00:34:30,814 INFO L226 Difference]: Without dead ends: 835 [2024-11-24 00:34:30,815 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=329, Invalid=3093, Unknown=0, NotChecked=0, Total=3422 [2024-11-24 00:34:30,816 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 249 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:34:30,816 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1612 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-24 00:34:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2024-11-24 00:34:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 617. [2024-11-24 00:34:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 590 states have (on average 1.2050847457627119) internal successors, (711), 597 states have internal predecessors, (711), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-24 00:34:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 747 transitions. [2024-11-24 00:34:31,114 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 747 transitions. Word has length 69 [2024-11-24 00:34:31,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:34:31,114 INFO L471 AbstractCegarLoop]: Abstraction has 617 states and 747 transitions. [2024-11-24 00:34:31,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:34:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 747 transitions. [2024-11-24 00:34:31,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-24 00:34:31,116 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:34:31,116 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:34:31,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-24 00:34:31,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:34:31,316 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:34:31,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:34:31,317 INFO L85 PathProgramCache]: Analyzing trace with hash -343850470, now seen corresponding path program 3 times [2024-11-24 00:34:31,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:34:31,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53067249] [2024-11-24 00:34:31,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:34:31,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:34:31,403 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-24 00:34:31,404 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:34:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-24 00:34:32,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:34:32,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53067249] [2024-11-24 00:34:32,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53067249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:34:32,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577645136] [2024-11-24 00:34:32,777 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:34:32,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:34:32,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:34:32,781 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:34:32,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-24 00:34:33,124 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-24 00:34:33,124 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:34:33,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-24 00:34:33,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:34:33,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:34:35,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:34:35,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-24 00:34:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-24 00:34:35,390 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:34:36,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:34:36,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2024-11-24 00:34:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-24 00:34:37,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577645136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:34:37,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:34:37,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 14] total 46 [2024-11-24 00:34:37,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584315071] [2024-11-24 00:34:37,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:34:37,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-24 00:34:37,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:34:37,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-24 00:34:37,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2024-11-24 00:34:37,148 INFO L87 Difference]: Start difference. First operand 617 states and 747 transitions. Second operand has 46 states, 46 states have (on average 3.0) internal successors, (138), 45 states have internal predecessors, (138), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-24 00:34:42,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:34:42,766 INFO L93 Difference]: Finished difference Result 956 states and 1182 transitions. [2024-11-24 00:34:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-24 00:34:42,767 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0) internal successors, (138), 45 states have internal predecessors, (138), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2024-11-24 00:34:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:34:42,771 INFO L225 Difference]: With dead ends: 956 [2024-11-24 00:34:42,771 INFO L226 Difference]: Without dead ends: 875 [2024-11-24 00:34:42,772 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=690, Invalid=5162, Unknown=0, NotChecked=0, Total=5852 [2024-11-24 00:34:42,773 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 341 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:34:42,773 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1050 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-24 00:34:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2024-11-24 00:34:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 625. [2024-11-24 00:34:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 598 states have (on average 1.2123745819397993) internal successors, (725), 605 states have internal predecessors, (725), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-24 00:34:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 761 transitions. [2024-11-24 00:34:43,000 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 761 transitions. Word has length 70 [2024-11-24 00:34:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:34:43,001 INFO L471 AbstractCegarLoop]: Abstraction has 625 states and 761 transitions. [2024-11-24 00:34:43,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0) internal successors, (138), 45 states have internal predecessors, (138), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-24 00:34:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 761 transitions. [2024-11-24 00:34:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-24 00:34:43,002 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:34:43,003 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:34:43,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-24 00:34:43,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:34:43,203 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:34:43,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:34:43,204 INFO L85 PathProgramCache]: Analyzing trace with hash 635402898, now seen corresponding path program 2 times [2024-11-24 00:34:43,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:34:43,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451905086] [2024-11-24 00:34:43,204 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:34:43,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:34:43,233 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:34:43,234 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:34:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-24 00:34:43,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:34:43,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451905086] [2024-11-24 00:34:43,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451905086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:34:43,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733481965] [2024-11-24 00:34:43,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:34:43,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:34:43,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:34:43,526 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:34:43,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-24 00:34:43,715 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:34:43,715 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:34:43,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:34:43,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:34:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-24 00:34:43,949 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:34:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-24 00:34:44,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733481965] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:34:44,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:34:44,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-11-24 00:34:44,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902478323] [2024-11-24 00:34:44,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:34:44,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-24 00:34:44,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:34:44,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-24 00:34:44,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-24 00:34:44,280 INFO L87 Difference]: Start difference. First operand 625 states and 761 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-24 00:34:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:34:44,860 INFO L93 Difference]: Finished difference Result 671 states and 812 transitions. [2024-11-24 00:34:44,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:34:44,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 74 [2024-11-24 00:34:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:34:44,864 INFO L225 Difference]: With dead ends: 671 [2024-11-24 00:34:44,864 INFO L226 Difference]: Without dead ends: 621 [2024-11-24 00:34:44,865 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-24 00:34:44,865 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 18 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:34:44,865 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 693 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 00:34:44,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2024-11-24 00:34:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 588. [2024-11-24 00:34:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 566 states have (on average 1.215547703180212) internal successors, (688), 571 states have internal predecessors, (688), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-24 00:34:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 714 transitions. [2024-11-24 00:34:45,067 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 714 transitions. Word has length 74 [2024-11-24 00:34:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:34:45,067 INFO L471 AbstractCegarLoop]: Abstraction has 588 states and 714 transitions. [2024-11-24 00:34:45,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-24 00:34:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 714 transitions. [2024-11-24 00:34:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-24 00:34:45,069 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:34:45,069 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:34:45,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-24 00:34:45,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-24 00:34:45,270 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:34:45,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:34:45,271 INFO L85 PathProgramCache]: Analyzing trace with hash -479849038, now seen corresponding path program 6 times [2024-11-24 00:34:45,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:34:45,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356915546] [2024-11-24 00:34:45,271 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:34:45,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:34:45,374 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-24 00:34:45,374 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:34:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-24 00:34:47,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:34:47,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356915546] [2024-11-24 00:34:47,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356915546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:34:47,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773211178] [2024-11-24 00:34:47,995 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:34:47,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:34:47,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:34:47,998 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:34:48,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-24 00:34:49,159 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-24 00:34:49,159 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:34:49,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-24 00:34:49,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:34:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-24 00:34:50,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:34:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-24 00:34:51,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773211178] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:34:51,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:34:51,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 43 [2024-11-24 00:34:51,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067047931] [2024-11-24 00:34:51,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:34:51,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-24 00:34:51,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:34:51,268 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-24 00:34:51,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2024-11-24 00:34:51,268 INFO L87 Difference]: Start difference. First operand 588 states and 714 transitions. Second operand has 43 states, 43 states have (on average 3.116279069767442) internal successors, (134), 43 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:34:59,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:34:59,153 INFO L93 Difference]: Finished difference Result 1792 states and 2239 transitions. [2024-11-24 00:34:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-24 00:34:59,154 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.116279069767442) internal successors, (134), 43 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 73 [2024-11-24 00:34:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:34:59,160 INFO L225 Difference]: With dead ends: 1792 [2024-11-24 00:34:59,160 INFO L226 Difference]: Without dead ends: 1776 [2024-11-24 00:34:59,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=914, Invalid=6396, Unknown=0, NotChecked=0, Total=7310 [2024-11-24 00:34:59,162 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 707 mSDsluCounter, 2142 mSDsCounter, 0 mSdLazyCounter, 2286 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:34:59,162 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 2248 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2286 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-24 00:34:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2024-11-24 00:34:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 600. [2024-11-24 00:34:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 578 states have (on average 1.217993079584775) internal successors, (704), 583 states have internal predecessors, (704), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-24 00:34:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 730 transitions. [2024-11-24 00:34:59,394 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 730 transitions. Word has length 73 [2024-11-24 00:34:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:34:59,394 INFO L471 AbstractCegarLoop]: Abstraction has 600 states and 730 transitions. [2024-11-24 00:34:59,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.116279069767442) internal successors, (134), 43 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:34:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 730 transitions. [2024-11-24 00:34:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-24 00:34:59,395 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:34:59,395 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:34:59,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-24 00:34:59,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-24 00:34:59,596 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:34:59,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:34:59,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2080758312, now seen corresponding path program 2 times [2024-11-24 00:34:59,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:34:59,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475688825] [2024-11-24 00:34:59,596 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:34:59,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:34:59,626 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:34:59,626 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:34:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-24 00:34:59,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:34:59,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475688825] [2024-11-24 00:34:59,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475688825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:34:59,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93540230] [2024-11-24 00:34:59,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:34:59,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:34:59,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:34:59,907 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:34:59,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-24 00:35:00,124 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:35:00,124 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:35:00,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-24 00:35:00,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:35:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-24 00:35:00,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:35:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-24 00:35:01,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93540230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:35:01,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:35:01,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 35 [2024-11-24 00:35:01,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144813205] [2024-11-24 00:35:01,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:35:01,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-24 00:35:01,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:35:01,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-24 00:35:01,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2024-11-24 00:35:01,704 INFO L87 Difference]: Start difference. First operand 600 states and 730 transitions. Second operand has 35 states, 34 states have (on average 4.352941176470588) internal successors, (148), 34 states have internal predecessors, (148), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:35:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:35:10,116 INFO L93 Difference]: Finished difference Result 1843 states and 2272 transitions. [2024-11-24 00:35:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-24 00:35:10,117 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.352941176470588) internal successors, (148), 34 states have internal predecessors, (148), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 73 [2024-11-24 00:35:10,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:35:10,120 INFO L225 Difference]: With dead ends: 1843 [2024-11-24 00:35:10,120 INFO L226 Difference]: Without dead ends: 1215 [2024-11-24 00:35:10,121 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3413 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1161, Invalid=11721, Unknown=0, NotChecked=0, Total=12882 [2024-11-24 00:35:10,122 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 286 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:35:10,122 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 1838 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-24 00:35:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2024-11-24 00:35:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 903. [2024-11-24 00:35:10,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 881 states have (on average 1.2190692395005676) internal successors, (1074), 886 states have internal predecessors, (1074), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-24 00:35:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1100 transitions. [2024-11-24 00:35:10,440 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1100 transitions. Word has length 73 [2024-11-24 00:35:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:35:10,440 INFO L471 AbstractCegarLoop]: Abstraction has 903 states and 1100 transitions. [2024-11-24 00:35:10,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.352941176470588) internal successors, (148), 34 states have internal predecessors, (148), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:35:10,440 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1100 transitions. [2024-11-24 00:35:10,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-24 00:35:10,442 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:35:10,442 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:35:10,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-24 00:35:10,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-24 00:35:10,642 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:35:10,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:35:10,643 INFO L85 PathProgramCache]: Analyzing trace with hash 614535123, now seen corresponding path program 1 times [2024-11-24 00:35:10,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:35:10,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897334077] [2024-11-24 00:35:10,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:35:10,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:35:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:35:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-24 00:35:12,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:35:12,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897334077] [2024-11-24 00:35:12,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897334077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:35:12,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788619613] [2024-11-24 00:35:12,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:35:12,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:35:12,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:35:12,089 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:35:12,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-24 00:35:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:35:12,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-24 00:35:12,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:35:12,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 00:35:17,076 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_7| Int)) (= (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_7|) 4) (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_7|) 4))) is different from true [2024-11-24 00:35:21,266 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_8| Int)) (= (select (select |c_#memory_int#1| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_8|) 4) (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~pat~0#1.base_BEFORE_CALL_8|) 4))) is different from true [2024-11-24 00:35:21,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-24 00:35:21,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-24 00:35:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 18 refuted. 1 times theorem prover too weak. 14 trivial. 3 not checked. [2024-11-24 00:35:21,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:35:22,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:35:22,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2024-11-24 00:35:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-24 00:35:22,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788619613] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:35:22,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:35:22,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 12] total 42 [2024-11-24 00:35:22,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313875894] [2024-11-24 00:35:22,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:35:22,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-24 00:35:22,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:35:22,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-24 00:35:22,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1440, Unknown=2, NotChecked=154, Total=1722 [2024-11-24 00:35:22,430 INFO L87 Difference]: Start difference. First operand 903 states and 1100 transitions. Second operand has 42 states, 41 states have (on average 3.1951219512195124) internal successors, (131), 42 states have internal predecessors, (131), 7 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-24 00:35:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:35:37,881 INFO L93 Difference]: Finished difference Result 1342 states and 1651 transitions. [2024-11-24 00:35:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-24 00:35:37,882 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.1951219512195124) internal successors, (131), 42 states have internal predecessors, (131), 7 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 76 [2024-11-24 00:35:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:35:37,888 INFO L225 Difference]: With dead ends: 1342 [2024-11-24 00:35:37,889 INFO L226 Difference]: Without dead ends: 1256 [2024-11-24 00:35:37,890 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=598, Invalid=5726, Unknown=4, NotChecked=314, Total=6642 [2024-11-24 00:35:37,891 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 355 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 3444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 857 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-24 00:35:37,891 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 1888 Invalid, 3444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2565 Invalid, 0 Unknown, 857 Unchecked, 3.5s Time] [2024-11-24 00:35:37,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2024-11-24 00:35:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 927. [2024-11-24 00:35:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 901 states have (on average 1.2153163152053275) internal successors, (1095), 906 states have internal predecessors, (1095), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-24 00:35:38,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1125 transitions. [2024-11-24 00:35:38,429 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1125 transitions. Word has length 76 [2024-11-24 00:35:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:35:38,429 INFO L471 AbstractCegarLoop]: Abstraction has 927 states and 1125 transitions. [2024-11-24 00:35:38,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.1951219512195124) internal successors, (131), 42 states have internal predecessors, (131), 7 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-24 00:35:38,430 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1125 transitions. [2024-11-24 00:35:38,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-24 00:35:38,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:35:38,432 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:35:38,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-24 00:35:38,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-24 00:35:38,636 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:35:38,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:35:38,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1189839836, now seen corresponding path program 4 times [2024-11-24 00:35:38,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:35:38,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872737414] [2024-11-24 00:35:38,637 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:35:38,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:35:38,676 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:35:38,676 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:35:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-24 00:35:39,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:35:39,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872737414] [2024-11-24 00:35:39,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872737414] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:35:39,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206244419] [2024-11-24 00:35:39,185 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:35:39,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:35:39,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:35:39,187 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:35:39,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-24 00:35:39,422 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:35:39,422 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:35:39,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-24 00:35:39,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:35:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-24 00:35:40,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:35:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-24 00:35:41,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206244419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:35:41,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:35:41,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 39 [2024-11-24 00:35:41,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434940789] [2024-11-24 00:35:41,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:35:41,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-24 00:35:41,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:35:41,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-24 00:35:41,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1341, Unknown=0, NotChecked=0, Total=1482 [2024-11-24 00:35:41,625 INFO L87 Difference]: Start difference. First operand 927 states and 1125 transitions. Second operand has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:35:50,019 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 21 DAG size of output: 21 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:35:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:35:56,724 INFO L93 Difference]: Finished difference Result 1318 states and 1608 transitions. [2024-11-24 00:35:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-24 00:35:56,725 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2024-11-24 00:35:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:35:56,729 INFO L225 Difference]: With dead ends: 1318 [2024-11-24 00:35:56,729 INFO L226 Difference]: Without dead ends: 1293 [2024-11-24 00:35:56,730 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2024-11-24 00:35:56,731 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 129 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-24 00:35:56,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 2233 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-24 00:35:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2024-11-24 00:35:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 917. [2024-11-24 00:35:57,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 891 states have (on average 1.2132435465768798) internal successors, (1081), 896 states have internal predecessors, (1081), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-24 00:35:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1111 transitions. [2024-11-24 00:35:57,220 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1111 transitions. Word has length 76 [2024-11-24 00:35:57,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:35:57,220 INFO L471 AbstractCegarLoop]: Abstraction has 917 states and 1111 transitions. [2024-11-24 00:35:57,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:35:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1111 transitions. [2024-11-24 00:35:57,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-24 00:35:57,222 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:35:57,222 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:35:57,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-24 00:35:57,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-24 00:35:57,423 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 00:35:57,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:35:57,423 INFO L85 PathProgramCache]: Analyzing trace with hash 768613691, now seen corresponding path program 1 times [2024-11-24 00:35:57,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:35:57,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540489307] [2024-11-24 00:35:57,423 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:35:57,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:35:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:35:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-24 00:35:58,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:35:58,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540489307] [2024-11-24 00:35:58,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540489307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:35:58,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026063665] [2024-11-24 00:35:58,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:35:58,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:35:58,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:35:58,079 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:35:58,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a818ff0-21a2-431a-a1a5-28aa10d37844/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-24 00:35:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:35:58,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-24 00:35:58,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:35:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:35:59,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:36:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-24 00:36:01,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026063665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:36:01,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:36:01,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 24] total 53 [2024-11-24 00:36:01,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359578136] [2024-11-24 00:36:01,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:36:01,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-24 00:36:01,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:36:01,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-24 00:36:01,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2456, Unknown=0, NotChecked=0, Total=2756 [2024-11-24 00:36:01,918 INFO L87 Difference]: Start difference. First operand 917 states and 1111 transitions. Second operand has 53 states, 53 states have (on average 2.3207547169811322) internal successors, (123), 52 states have internal predecessors, (123), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-24 00:36:46,522 WARN L286 SmtUtils]: Spent 44.20s on a formula simplification. DAG size of input: 32 DAG size of output: 30 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:37:02,756 WARN L286 SmtUtils]: Spent 16.07s on a formula simplification. DAG size of input: 26 DAG size of output: 25 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:37:06,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-24 00:37:10,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-24 00:37:15,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-24 00:37:59,268 WARN L286 SmtUtils]: Spent 44.13s on a formula simplification. DAG size of input: 31 DAG size of output: 29 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:38:27,502 WARN L286 SmtUtils]: Spent 28.11s on a formula simplification. DAG size of input: 37 DAG size of output: 35 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:39:11,773 WARN L286 SmtUtils]: Spent 44.15s on a formula simplification. DAG size of input: 39 DAG size of output: 37 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:39:56,511 WARN L286 SmtUtils]: Spent 44.16s on a formula simplification. DAG size of input: 39 DAG size of output: 37 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:40:40,721 WARN L286 SmtUtils]: Spent 44.14s on a formula simplification. DAG size of input: 49 DAG size of output: 39 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:41:08,945 WARN L286 SmtUtils]: Spent 28.11s on a formula simplification. DAG size of input: 41 DAG size of output: 39 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:41:53,670 WARN L286 SmtUtils]: Spent 44.20s on a formula simplification. DAG size of input: 47 DAG size of output: 45 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:42:21,883 WARN L286 SmtUtils]: Spent 28.11s on a formula simplification. DAG size of input: 41 DAG size of output: 39 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:43:02,822 WARN L286 SmtUtils]: Spent 40.20s on a formula simplification. DAG size of input: 46 DAG size of output: 44 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-24 00:43:47,261 WARN L286 SmtUtils]: Spent 44.23s on a formula simplification. DAG size of input: 52 DAG size of output: 50 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)