./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 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/relax-2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd --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-826ab2b [2024-11-13 16:02:10,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 16:02:10,723 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 16:02:10,738 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 16:02:10,738 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 16:02:10,775 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 16:02:10,776 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 16:02:10,776 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 16:02:10,777 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 16:02:10,777 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 16:02:10,777 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 16:02:10,777 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 16:02:10,778 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 16:02:10,778 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 16:02:10,778 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 16:02:10,778 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 16:02:10,779 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 16:02:10,779 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 16:02:10,779 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 16:02:10,779 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 16:02:10,780 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 16:02:10,780 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 16:02:10,780 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 16:02:10,780 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 16:02:10,780 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 16:02:10,781 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 16:02:10,781 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 16:02:10,781 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 16:02:10,781 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 16:02:10,781 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 16:02:10,782 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 16:02:10,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 16:02:10,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:02:10,782 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 16:02:10,782 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 16:02:10,783 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 16:02:10,783 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 16:02:10,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 16:02:10,783 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 16:02:10,783 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 16:02:10,783 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 16:02:10,784 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 16:02:10,784 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_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd 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 [2024-11-13 16:02:11,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 16:02:11,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 16:02:11,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 16:02:11,218 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 16:02:11,218 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 16:02:11,220 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/array-examples/relax-2-2.i Unable to find full path for "g++" [2024-11-13 16:02:13,410 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 16:02:13,904 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 16:02:13,912 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/sv-benchmarks/c/array-examples/relax-2-2.i [2024-11-13 16:02:13,935 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/data/c2c47b6f8/d3d8d0cc6fe24be2a805b8672dd92a84/FLAG8f12b4fe1 [2024-11-13 16:02:13,961 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/data/c2c47b6f8/d3d8d0cc6fe24be2a805b8672dd92a84 [2024-11-13 16:02:13,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 16:02:13,972 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 16:02:13,974 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 16:02:13,975 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 16:02:13,982 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 16:02:13,983 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:02:13" (1/1) ... [2024-11-13 16:02:13,985 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dcf09f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:13, skipping insertion in model container [2024-11-13 16:02:13,985 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:02:13" (1/1) ... [2024-11-13 16:02:14,053 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 16:02:14,304 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_c04c947f-e02b-495c-b708-5dceadf666f2/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2024-11-13 16:02:14,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:02:14,589 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 16:02:14,605 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_c04c947f-e02b-495c-b708-5dceadf666f2/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2024-11-13 16:02:14,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:02:14,728 INFO L204 MainTranslator]: Completed translation [2024-11-13 16:02:14,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14 WrapperNode [2024-11-13 16:02:14,729 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 16:02:14,731 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 16:02:14,732 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 16:02:14,732 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 16:02:14,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (1/1) ... [2024-11-13 16:02:14,766 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (1/1) ... [2024-11-13 16:02:14,812 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 135 [2024-11-13 16:02:14,812 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 16:02:14,820 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 16:02:14,820 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 16:02:14,820 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 16:02:14,838 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (1/1) ... [2024-11-13 16:02:14,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (1/1) ... [2024-11-13 16:02:14,849 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (1/1) ... [2024-11-13 16:02:14,880 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]. [2024-11-13 16:02:14,880 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (1/1) ... [2024-11-13 16:02:14,881 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (1/1) ... [2024-11-13 16:02:14,899 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (1/1) ... [2024-11-13 16:02:14,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (1/1) ... [2024-11-13 16:02:14,913 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (1/1) ... [2024-11-13 16:02:14,918 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (1/1) ... [2024-11-13 16:02:14,921 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 16:02:14,924 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 16:02:14,924 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 16:02:14,928 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 16:02:14,929 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (1/1) ... [2024-11-13 16:02:14,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:02:14,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:14,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 16:02:14,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 16:02:15,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 16:02:15,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 16:02:15,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-13 16:02:15,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 16:02:15,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 16:02:15,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 16:02:15,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 16:02:15,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-13 16:02:15,024 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-13 16:02:15,025 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-13 16:02:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 16:02:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 16:02:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 16:02:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 16:02:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-13 16:02:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 16:02:15,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 16:02:15,170 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 16:02:15,172 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 16:02:15,493 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-11-13 16:02:15,493 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 16:02:15,507 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 16:02:15,508 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-13 16:02:15,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:02:15 BoogieIcfgContainer [2024-11-13 16:02:15,508 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 16:02:15,512 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 16:02:15,513 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 16:02:15,518 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 16:02:15,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 04:02:13" (1/3) ... [2024-11-13 16:02:15,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d98caad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:02:15, skipping insertion in model container [2024-11-13 16:02:15,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:02:14" (2/3) ... [2024-11-13 16:02:15,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d98caad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:02:15, skipping insertion in model container [2024-11-13 16:02:15,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:02:15" (3/3) ... [2024-11-13 16:02:15,522 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2024-11-13 16:02:15,553 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 16:02:15,556 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG relax-2-2.i that has 3 procedures, 53 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-13 16:02:15,656 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:02:15,673 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;@b0d50e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:02:15,673 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 16:02:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 46 states have internal predecessors, (67), 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) [2024-11-13 16:02:15,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 16:02:15,686 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:15,687 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:02:15,688 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:15,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:15,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1343942192, now seen corresponding path program 1 times [2024-11-13 16:02:15,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:15,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418870514] [2024-11-13 16:02:15,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:15,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:15,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:15,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:15,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:15,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418870514] [2024-11-13 16:02:15,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418870514] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:15,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:02:15,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 16:02:15,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672101473] [2024-11-13 16:02:15,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:15,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 16:02:15,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 16:02:15,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 16:02:15,981 INFO L87 Difference]: Start difference. First operand has 53 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 46 states have internal predecessors, (67), 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 8.0) internal successors, (16), 2 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), 2 states have call successors, (2) [2024-11-13 16:02:16,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:16,012 INFO L93 Difference]: Finished difference Result 103 states and 165 transitions. [2024-11-13 16:02:16,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 16:02:16,015 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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), 2 states have call successors, (2) Word has length 24 [2024-11-13 16:02:16,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:16,024 INFO L225 Difference]: With dead ends: 103 [2024-11-13 16:02:16,024 INFO L226 Difference]: Without dead ends: 47 [2024-11-13 16:02:16,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 16:02:16,033 INFO L432 NwaCegarLoop]: 74 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, 74 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 [2024-11-13 16:02:16,034 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:02:16,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-13 16:02:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-13 16:02:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 41 states have internal predecessors, (53), 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) [2024-11-13 16:02:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2024-11-13 16:02:16,082 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 24 [2024-11-13 16:02:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:16,082 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2024-11-13 16:02:16,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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), 2 states have call successors, (2) [2024-11-13 16:02:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2024-11-13 16:02:16,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 16:02:16,084 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:16,084 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:02:16,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 16:02:16,084 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:16,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:16,086 INFO L85 PathProgramCache]: Analyzing trace with hash -506603764, now seen corresponding path program 1 times [2024-11-13 16:02:16,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:16,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139389485] [2024-11-13 16:02:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:16,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:16,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:16,489 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:16,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:16,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139389485] [2024-11-13 16:02:16,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139389485] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:16,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:02:16,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:02:16,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351632748] [2024-11-13 16:02:16,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:16,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:02:16,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:16,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:02:16,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:02:16,509 INFO L87 Difference]: Start difference. First operand 47 states and 66 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) [2024-11-13 16:02:16,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:16,551 INFO L93 Difference]: Finished difference Result 71 states and 97 transitions. [2024-11-13 16:02:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:02:16,551 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 [2024-11-13 16:02:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:16,552 INFO L225 Difference]: With dead ends: 71 [2024-11-13 16:02:16,552 INFO L226 Difference]: Without dead ends: 49 [2024-11-13 16:02:16,553 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:02:16,554 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 185 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 [2024-11-13 16:02:16,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 185 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:02:16,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-13 16:02:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-13 16:02:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.4102564102564104) internal successors, (55), 43 states have internal predecessors, (55), 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) [2024-11-13 16:02:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2024-11-13 16:02:16,563 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 24 [2024-11-13 16:02:16,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:16,564 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2024-11-13 16:02:16,568 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) [2024-11-13 16:02:16,568 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2024-11-13 16:02:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 16:02:16,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:16,569 INFO L215 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] [2024-11-13 16:02:16,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 16:02:16,570 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:16,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1759698611, now seen corresponding path program 1 times [2024-11-13 16:02:16,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:16,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687600338] [2024-11-13 16:02:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:16,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:17,044 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:17,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:17,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:17,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687600338] [2024-11-13 16:02:17,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687600338] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:17,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:02:17,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 16:02:17,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521954868] [2024-11-13 16:02:17,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:17,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 16:02:17,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:17,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 16:02:17,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 16:02:17,064 INFO L87 Difference]: Start difference. First operand 49 states and 68 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) [2024-11-13 16:02:17,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:17,277 INFO L93 Difference]: Finished difference Result 102 states and 140 transitions. [2024-11-13 16:02:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 16:02:17,278 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 [2024-11-13 16:02:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:17,279 INFO L225 Difference]: With dead ends: 102 [2024-11-13 16:02:17,279 INFO L226 Difference]: Without dead ends: 68 [2024-11-13 16:02:17,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:02:17,281 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 19 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:17,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 269 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:02:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-13 16:02:17,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2024-11-13 16:02:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 60 states have internal predecessors, (79), 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) [2024-11-13 16:02:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 92 transitions. [2024-11-13 16:02:17,303 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 92 transitions. Word has length 27 [2024-11-13 16:02:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:17,303 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 92 transitions. [2024-11-13 16:02:17,303 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) [2024-11-13 16:02:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 92 transitions. [2024-11-13 16:02:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-13 16:02:17,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:17,305 INFO L215 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] [2024-11-13 16:02:17,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 16:02:17,305 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:17,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2010530598, now seen corresponding path program 1 times [2024-11-13 16:02:17,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:17,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040381232] [2024-11-13 16:02:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:17,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:17,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:17,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:17,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:17,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040381232] [2024-11-13 16:02:17,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040381232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:17,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:02:17,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 16:02:17,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380072531] [2024-11-13 16:02:17,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:17,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 16:02:17,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:17,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 16:02:17,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:02:17,950 INFO L87 Difference]: Start difference. First operand 66 states and 92 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) [2024-11-13 16:02:18,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:18,226 INFO L93 Difference]: Finished difference Result 104 states and 141 transitions. [2024-11-13 16:02:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:02:18,227 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 [2024-11-13 16:02:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:18,231 INFO L225 Difference]: With dead ends: 104 [2024-11-13 16:02:18,231 INFO L226 Difference]: Without dead ends: 91 [2024-11-13 16:02:18,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-13 16:02:18,232 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 66 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:18,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 296 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:02:18,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-13 16:02:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2024-11-13 16:02:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 1.4153846153846155) internal successors, (92), 69 states have internal predecessors, (92), 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) [2024-11-13 16:02:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 105 transitions. [2024-11-13 16:02:18,256 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 105 transitions. Word has length 28 [2024-11-13 16:02:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:18,257 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 105 transitions. [2024-11-13 16:02:18,257 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) [2024-11-13 16:02:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 105 transitions. [2024-11-13 16:02:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-13 16:02:18,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:18,258 INFO L215 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] [2024-11-13 16:02:18,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 16:02:18,258 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:18,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:18,259 INFO L85 PathProgramCache]: Analyzing trace with hash 938065724, now seen corresponding path program 1 times [2024-11-13 16:02:18,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:18,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362320176] [2024-11-13 16:02:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:18,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:18,813 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:18,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:18,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:18,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362320176] [2024-11-13 16:02:18,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362320176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:18,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045270599] [2024-11-13 16:02:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:18,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:18,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:18,826 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:18,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 16:02:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:18,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 16:02:18,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:19,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:19,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045270599] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:19,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:19,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-13 16:02:19,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6526598] [2024-11-13 16:02:19,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:19,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 16:02:19,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:19,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 16:02:19,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-13 16:02:19,735 INFO L87 Difference]: Start difference. First operand 75 states and 105 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 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) [2024-11-13 16:02:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:20,759 INFO L93 Difference]: Finished difference Result 194 states and 282 transitions. [2024-11-13 16:02:20,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 16:02:20,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 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 28 [2024-11-13 16:02:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:20,762 INFO L225 Difference]: With dead ends: 194 [2024-11-13 16:02:20,763 INFO L226 Difference]: Without dead ends: 164 [2024-11-13 16:02:20,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2024-11-13 16:02:20,764 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 171 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:20,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 912 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 16:02:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-13 16:02:20,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 122. [2024-11-13 16:02:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 109 states have (on average 1.4403669724770642) internal successors, (157), 114 states have internal predecessors, (157), 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) [2024-11-13 16:02:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 174 transitions. [2024-11-13 16:02:20,797 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 174 transitions. Word has length 28 [2024-11-13 16:02:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:20,798 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 174 transitions. [2024-11-13 16:02:20,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 17 states have internal predecessors, (38), 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) [2024-11-13 16:02:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 174 transitions. [2024-11-13 16:02:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 16:02:20,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:20,800 INFO L215 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] [2024-11-13 16:02:20,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 16:02:21,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:21,001 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:21,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:21,002 INFO L85 PathProgramCache]: Analyzing trace with hash 15596593, now seen corresponding path program 1 times [2024-11-13 16:02:21,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:21,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785116315] [2024-11-13 16:02:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:21,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:21,262 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:21,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:21,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:21,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785116315] [2024-11-13 16:02:21,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785116315] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:21,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:02:21,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 16:02:21,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449067104] [2024-11-13 16:02:21,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:21,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:02:21,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:21,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:02:21,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:02:21,276 INFO L87 Difference]: Start difference. First operand 122 states and 174 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2024-11-13 16:02:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:21,393 INFO L93 Difference]: Finished difference Result 141 states and 195 transitions. [2024-11-13 16:02:21,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:02:21,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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 29 [2024-11-13 16:02:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:21,395 INFO L225 Difference]: With dead ends: 141 [2024-11-13 16:02:21,395 INFO L226 Difference]: Without dead ends: 116 [2024-11-13 16:02:21,396 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 16:02:21,397 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 13 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:21,397 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 224 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:02:21,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-13 16:02:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2024-11-13 16:02:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 97 states have (on average 1.402061855670103) internal successors, (136), 102 states have internal predecessors, (136), 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) [2024-11-13 16:02:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 153 transitions. [2024-11-13 16:02:21,430 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 153 transitions. Word has length 29 [2024-11-13 16:02:21,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:21,430 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 153 transitions. [2024-11-13 16:02:21,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2024-11-13 16:02:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 153 transitions. [2024-11-13 16:02:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 16:02:21,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:21,432 INFO L215 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] [2024-11-13 16:02:21,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 16:02:21,435 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:21,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:21,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1713193361, now seen corresponding path program 1 times [2024-11-13 16:02:21,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:21,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443778313] [2024-11-13 16:02:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:21,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:21,938 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:21,945 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:21,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:21,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443778313] [2024-11-13 16:02:21,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443778313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:21,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802543475] [2024-11-13 16:02:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:21,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:21,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:21,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:21,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 16:02:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:22,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 16:02:22,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:22,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:22,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802543475] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:22,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:22,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12] total 23 [2024-11-13 16:02:22,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335580402] [2024-11-13 16:02:22,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:22,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 16:02:22,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:22,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 16:02:22,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2024-11-13 16:02:22,916 INFO L87 Difference]: Start difference. First operand 110 states and 153 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 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) [2024-11-13 16:02:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:24,918 INFO L93 Difference]: Finished difference Result 171 states and 235 transitions. [2024-11-13 16:02:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 16:02:24,919 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 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 29 [2024-11-13 16:02:24,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:24,921 INFO L225 Difference]: With dead ends: 171 [2024-11-13 16:02:24,921 INFO L226 Difference]: Without dead ends: 144 [2024-11-13 16:02:24,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 16:02:24,923 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 229 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:24,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 830 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 16:02:24,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-13 16:02:24,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2024-11-13 16:02:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 94 states have (on average 1.3617021276595744) internal successors, (128), 99 states have internal predecessors, (128), 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) [2024-11-13 16:02:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 145 transitions. [2024-11-13 16:02:24,941 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 145 transitions. Word has length 29 [2024-11-13 16:02:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:24,942 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 145 transitions. [2024-11-13 16:02:24,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 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) [2024-11-13 16:02:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 145 transitions. [2024-11-13 16:02:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 16:02:24,943 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:24,943 INFO L215 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] [2024-11-13 16:02:24,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 16:02:25,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:25,144 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:25,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:25,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1237250003, now seen corresponding path program 2 times [2024-11-13 16:02:25,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:25,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811668663] [2024-11-13 16:02:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:25,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:25,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:25,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:25,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:25,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811668663] [2024-11-13 16:02:25,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811668663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:25,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863876525] [2024-11-13 16:02:25,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:02:25,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:25,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:25,576 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:25,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 16:02:25,697 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 16:02:25,697 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:02:25,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 16:02:25,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:02:25,932 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:02:25,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863876525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:25,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:02:25,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-11-13 16:02:25,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651927494] [2024-11-13 16:02:25,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:25,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 16:02:25,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:25,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 16:02:25,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-11-13 16:02:25,934 INFO L87 Difference]: Start difference. First operand 107 states and 145 transitions. Second operand has 8 states, 8 states have (on average 2.5) 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) [2024-11-13 16:02:26,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:26,173 INFO L93 Difference]: Finished difference Result 184 states and 246 transitions. [2024-11-13 16:02:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 16:02:26,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) 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 29 [2024-11-13 16:02:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:26,176 INFO L225 Difference]: With dead ends: 184 [2024-11-13 16:02:26,176 INFO L226 Difference]: Without dead ends: 136 [2024-11-13 16:02:26,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:02:26,179 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 17 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:26,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 342 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:02:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-13 16:02:26,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2024-11-13 16:02:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 109 states have internal predecessors, (141), 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) [2024-11-13 16:02:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 158 transitions. [2024-11-13 16:02:26,213 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 158 transitions. Word has length 29 [2024-11-13 16:02:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:26,213 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 158 transitions. [2024-11-13 16:02:26,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) 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) [2024-11-13 16:02:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 158 transitions. [2024-11-13 16:02:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 16:02:26,215 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:26,215 INFO L215 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] [2024-11-13 16:02:26,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 16:02:26,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:26,416 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:26,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:26,416 INFO L85 PathProgramCache]: Analyzing trace with hash -451741156, now seen corresponding path program 1 times [2024-11-13 16:02:26,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:26,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793374825] [2024-11-13 16:02:26,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:26,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:27,103 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:27,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:27,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:27,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793374825] [2024-11-13 16:02:27,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793374825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:27,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042840436] [2024-11-13 16:02:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:27,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:27,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:27,118 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:27,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 16:02:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:27,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 16:02:27,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:27,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:28,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042840436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:28,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:28,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 24 [2024-11-13 16:02:28,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316532185] [2024-11-13 16:02:28,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:28,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 16:02:28,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:28,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 16:02:28,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-11-13 16:02:28,090 INFO L87 Difference]: Start difference. First operand 117 states and 158 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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) [2024-11-13 16:02:29,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:29,995 INFO L93 Difference]: Finished difference Result 298 states and 425 transitions. [2024-11-13 16:02:29,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 16:02:29,996 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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 [2024-11-13 16:02:29,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:29,997 INFO L225 Difference]: With dead ends: 298 [2024-11-13 16:02:29,997 INFO L226 Difference]: Without dead ends: 247 [2024-11-13 16:02:30,000 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=400, Invalid=1322, Unknown=0, NotChecked=0, Total=1722 [2024-11-13 16:02:30,002 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 663 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:30,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 990 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 16:02:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-13 16:02:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 136. [2024-11-13 16:02:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 123 states have (on average 1.3495934959349594) internal successors, (166), 128 states have internal predecessors, (166), 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) [2024-11-13 16:02:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 183 transitions. [2024-11-13 16:02:30,038 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 183 transitions. Word has length 30 [2024-11-13 16:02:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:30,039 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 183 transitions. [2024-11-13 16:02:30,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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) [2024-11-13 16:02:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 183 transitions. [2024-11-13 16:02:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 16:02:30,043 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:30,044 INFO L215 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] [2024-11-13 16:02:30,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 16:02:30,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:30,244 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:30,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:30,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1028415304, now seen corresponding path program 2 times [2024-11-13 16:02:30,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:30,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95747027] [2024-11-13 16:02:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:30,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:30,470 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:30,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:30,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:30,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95747027] [2024-11-13 16:02:30,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95747027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:30,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908439175] [2024-11-13 16:02:30,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:02:30,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:30,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:30,480 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:30,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 16:02:30,619 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 16:02:30,619 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:02:30,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 16:02:30,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:02:30,740 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:02:30,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908439175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:30,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:02:30,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-11-13 16:02:30,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61106033] [2024-11-13 16:02:30,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:30,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 16:02:30,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:30,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 16:02:30,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:02:30,742 INFO L87 Difference]: Start difference. First operand 136 states and 183 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2024-11-13 16:02:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:30,874 INFO L93 Difference]: Finished difference Result 163 states and 212 transitions. [2024-11-13 16:02:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 16:02:30,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 30 [2024-11-13 16:02:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:30,877 INFO L225 Difference]: With dead ends: 163 [2024-11-13 16:02:30,877 INFO L226 Difference]: Without dead ends: 150 [2024-11-13 16:02:30,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:02:30,878 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 10 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:30,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 252 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:02:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-13 16:02:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2024-11-13 16:02:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 123 states have (on average 1.3414634146341464) internal successors, (165), 128 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) [2024-11-13 16:02:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 182 transitions. [2024-11-13 16:02:30,907 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 182 transitions. Word has length 30 [2024-11-13 16:02:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:30,907 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 182 transitions. [2024-11-13 16:02:30,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2024-11-13 16:02:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 182 transitions. [2024-11-13 16:02:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 16:02:30,909 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:30,909 INFO L215 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] [2024-11-13 16:02:30,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 16:02:31,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 16:02:31,110 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:31,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:31,110 INFO L85 PathProgramCache]: Analyzing trace with hash -392914687, now seen corresponding path program 1 times [2024-11-13 16:02:31,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:31,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543702510] [2024-11-13 16:02:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:31,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:31,194 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:31,197 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:31,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543702510] [2024-11-13 16:02:31,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543702510] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:31,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:02:31,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:02:31,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222166941] [2024-11-13 16:02:31,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:31,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:02:31,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:31,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:02:31,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:02:31,207 INFO L87 Difference]: Start difference. First operand 136 states and 182 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) [2024-11-13 16:02:31,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:31,244 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2024-11-13 16:02:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:02:31,245 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 [2024-11-13 16:02:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:31,246 INFO L225 Difference]: With dead ends: 165 [2024-11-13 16:02:31,248 INFO L226 Difference]: Without dead ends: 125 [2024-11-13 16:02:31,248 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:02:31,249 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:31,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 185 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:02:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-13 16:02:31,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-11-13 16:02:31,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 112 states have (on average 1.3125) internal successors, (147), 117 states have internal predecessors, (147), 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) [2024-11-13 16:02:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 164 transitions. [2024-11-13 16:02:31,276 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 164 transitions. Word has length 31 [2024-11-13 16:02:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:31,276 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 164 transitions. [2024-11-13 16:02:31,277 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) [2024-11-13 16:02:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 164 transitions. [2024-11-13 16:02:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 16:02:31,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:31,278 INFO L215 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] [2024-11-13 16:02:31,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 16:02:31,278 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:31,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash 451810895, now seen corresponding path program 1 times [2024-11-13 16:02:31,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:31,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235690582] [2024-11-13 16:02:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:31,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:31,443 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:31,446 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:02:31,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:31,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235690582] [2024-11-13 16:02:31,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235690582] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:31,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:02:31,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 16:02:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611398179] [2024-11-13 16:02:31,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:31,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:02:31,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:02:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:02:31,456 INFO L87 Difference]: Start difference. First operand 125 states and 164 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2024-11-13 16:02:31,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:31,560 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2024-11-13 16:02:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:02:31,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 31 [2024-11-13 16:02:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:31,562 INFO L225 Difference]: With dead ends: 144 [2024-11-13 16:02:31,563 INFO L226 Difference]: Without dead ends: 137 [2024-11-13 16:02:31,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:02:31,564 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 34 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:31,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 168 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:02:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-13 16:02:31,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 126. [2024-11-13 16:02:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 113 states have (on average 1.3185840707964602) internal successors, (149), 118 states have internal predecessors, (149), 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) [2024-11-13 16:02:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2024-11-13 16:02:31,582 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 31 [2024-11-13 16:02:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:31,582 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2024-11-13 16:02:31,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2024-11-13 16:02:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2024-11-13 16:02:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 16:02:31,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:31,583 INFO L215 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] [2024-11-13 16:02:31,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 16:02:31,583 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:31,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:31,584 INFO L85 PathProgramCache]: Analyzing trace with hash 453657937, now seen corresponding path program 1 times [2024-11-13 16:02:31,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:31,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742249492] [2024-11-13 16:02:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:31,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:31,787 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:31,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:31,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:31,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742249492] [2024-11-13 16:02:31,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742249492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:31,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174115072] [2024-11-13 16:02:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:31,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:31,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:31,798 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:31,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 16:02:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:31,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 16:02:31,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:32,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:32,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174115072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:32,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:32,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 17 [2024-11-13 16:02:32,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292743482] [2024-11-13 16:02:32,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:32,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 16:02:32,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:32,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 16:02:32,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-13 16:02:32,397 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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) [2024-11-13 16:02:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:33,021 INFO L93 Difference]: Finished difference Result 209 states and 289 transitions. [2024-11-13 16:02:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 16:02:33,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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 [2024-11-13 16:02:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:33,023 INFO L225 Difference]: With dead ends: 209 [2024-11-13 16:02:33,023 INFO L226 Difference]: Without dead ends: 176 [2024-11-13 16:02:33,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2024-11-13 16:02:33,025 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 199 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:33,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 708 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 16:02:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-13 16:02:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 140. [2024-11-13 16:02:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 126 states have (on average 1.3333333333333333) internal successors, (168), 131 states have internal predecessors, (168), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-13 16:02:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 187 transitions. [2024-11-13 16:02:33,044 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 187 transitions. Word has length 31 [2024-11-13 16:02:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:33,045 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 187 transitions. [2024-11-13 16:02:33,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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) [2024-11-13 16:02:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 187 transitions. [2024-11-13 16:02:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-13 16:02:33,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:33,046 INFO L215 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] [2024-11-13 16:02:33,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 16:02:33,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 16:02:33,250 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:33,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:33,251 INFO L85 PathProgramCache]: Analyzing trace with hash -154109818, now seen corresponding path program 1 times [2024-11-13 16:02:33,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:33,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763463063] [2024-11-13 16:02:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:33,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:33,298 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:33,302 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:33,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:33,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763463063] [2024-11-13 16:02:33,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763463063] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:33,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:02:33,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:02:33,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975073862] [2024-11-13 16:02:33,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:33,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:02:33,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:33,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:02:33,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:02:33,307 INFO L87 Difference]: Start difference. First operand 140 states and 187 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) [2024-11-13 16:02:33,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:33,352 INFO L93 Difference]: Finished difference Result 204 states and 276 transitions. [2024-11-13 16:02:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:02:33,352 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 [2024-11-13 16:02:33,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:33,354 INFO L225 Difference]: With dead ends: 204 [2024-11-13 16:02:33,355 INFO L226 Difference]: Without dead ends: 161 [2024-11-13 16:02:33,356 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:02:33,357 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 4 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 121 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 [2024-11-13 16:02:33,357 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 121 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:02:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-13 16:02:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2024-11-13 16:02:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 143 states have (on average 1.3566433566433567) internal successors, (194), 148 states have internal predecessors, (194), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-13 16:02:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 213 transitions. [2024-11-13 16:02:33,391 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 213 transitions. Word has length 32 [2024-11-13 16:02:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:33,391 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 213 transitions. [2024-11-13 16:02:33,391 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) [2024-11-13 16:02:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 213 transitions. [2024-11-13 16:02:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 16:02:33,392 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:33,392 INFO L215 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] [2024-11-13 16:02:33,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-13 16:02:33,392 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:33,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash 105734022, now seen corresponding path program 1 times [2024-11-13 16:02:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:33,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976561870] [2024-11-13 16:02:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:33,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:33,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:33,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:33,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:33,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976561870] [2024-11-13 16:02:33,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976561870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:33,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174589274] [2024-11-13 16:02:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:33,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:33,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:33,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:33,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 16:02:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:33,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 16:02:33,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:34,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:34,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174589274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:34,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:34,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2024-11-13 16:02:34,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133133330] [2024-11-13 16:02:34,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:34,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 16:02:34,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:34,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 16:02:34,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-11-13 16:02:34,707 INFO L87 Difference]: Start difference. First operand 157 states and 213 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 22 states have internal predecessors, (59), 4 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) [2024-11-13 16:02:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:35,913 INFO L93 Difference]: Finished difference Result 346 states and 481 transitions. [2024-11-13 16:02:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 16:02:35,914 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 22 states have internal predecessors, (59), 4 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 33 [2024-11-13 16:02:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:35,918 INFO L225 Difference]: With dead ends: 346 [2024-11-13 16:02:35,919 INFO L226 Difference]: Without dead ends: 344 [2024-11-13 16:02:35,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 16:02:35,923 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 304 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:35,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 1212 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 16:02:35,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2024-11-13 16:02:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 206. [2024-11-13 16:02:35,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 189 states have (on average 1.380952380952381) internal successors, (261), 196 states have internal predecessors, (261), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:02:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 284 transitions. [2024-11-13 16:02:35,977 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 284 transitions. Word has length 33 [2024-11-13 16:02:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:35,979 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 284 transitions. [2024-11-13 16:02:35,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 22 states have internal predecessors, (59), 4 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) [2024-11-13 16:02:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 284 transitions. [2024-11-13 16:02:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 16:02:35,980 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:35,980 INFO L215 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] [2024-11-13 16:02:36,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 16:02:36,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 16:02:36,185 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:36,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:36,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2132285882, now seen corresponding path program 2 times [2024-11-13 16:02:36,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:36,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044792027] [2024-11-13 16:02:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:36,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:36,604 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:36,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:36,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:36,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044792027] [2024-11-13 16:02:36,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044792027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:36,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348140152] [2024-11-13 16:02:36,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:02:36,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:36,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:36,615 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:36,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 16:02:36,746 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 16:02:36,746 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:02:36,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 16:02:36,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 16:02:36,858 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:02:36,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348140152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:36,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:02:36,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 14 [2024-11-13 16:02:36,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135976617] [2024-11-13 16:02:36,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:36,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 16:02:36,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:36,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 16:02:36,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-11-13 16:02:36,860 INFO L87 Difference]: Start difference. First operand 206 states and 284 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2024-11-13 16:02:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:37,054 INFO L93 Difference]: Finished difference Result 224 states and 301 transitions. [2024-11-13 16:02:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:02:37,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 33 [2024-11-13 16:02:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:37,056 INFO L225 Difference]: With dead ends: 224 [2024-11-13 16:02:37,057 INFO L226 Difference]: Without dead ends: 222 [2024-11-13 16:02:37,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:02:37,058 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 35 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:37,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 208 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:02:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-13 16:02:37,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 210. [2024-11-13 16:02:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 192 states have (on average 1.375) internal successors, (264), 199 states have internal predecessors, (264), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:02:37,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 287 transitions. [2024-11-13 16:02:37,093 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 287 transitions. Word has length 33 [2024-11-13 16:02:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:37,093 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 287 transitions. [2024-11-13 16:02:37,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2024-11-13 16:02:37,093 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 287 transitions. [2024-11-13 16:02:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 16:02:37,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:37,095 INFO L215 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] [2024-11-13 16:02:37,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 16:02:37,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 16:02:37,295 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:37,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:37,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1960102952, now seen corresponding path program 1 times [2024-11-13 16:02:37,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:37,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348789106] [2024-11-13 16:02:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:37,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:37,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:37,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:02:37,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:37,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348789106] [2024-11-13 16:02:37,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348789106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:37,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228330391] [2024-11-13 16:02:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:37,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:37,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:37,467 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:37,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 16:02:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:37,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 16:02:37,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:38,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:02:38,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228330391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:38,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:38,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2024-11-13 16:02:38,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124512843] [2024-11-13 16:02:38,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:38,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 16:02:38,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:38,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 16:02:38,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-13 16:02:38,249 INFO L87 Difference]: Start difference. First operand 210 states and 287 transitions. Second operand has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 4 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) [2024-11-13 16:02:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:39,083 INFO L93 Difference]: Finished difference Result 456 states and 643 transitions. [2024-11-13 16:02:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 16:02:39,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 4 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 34 [2024-11-13 16:02:39,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:39,087 INFO L225 Difference]: With dead ends: 456 [2024-11-13 16:02:39,087 INFO L226 Difference]: Without dead ends: 417 [2024-11-13 16:02:39,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-11-13 16:02:39,090 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 276 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:39,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 672 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 16:02:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2024-11-13 16:02:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 252. [2024-11-13 16:02:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 234 states have (on average 1.393162393162393) internal successors, (326), 241 states have internal predecessors, (326), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:02:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 349 transitions. [2024-11-13 16:02:39,151 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 349 transitions. Word has length 34 [2024-11-13 16:02:39,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:39,152 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 349 transitions. [2024-11-13 16:02:39,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 4 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) [2024-11-13 16:02:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 349 transitions. [2024-11-13 16:02:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 16:02:39,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:39,155 INFO L215 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] [2024-11-13 16:02:39,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 16:02:39,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 16:02:39,356 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:39,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1654805974, now seen corresponding path program 1 times [2024-11-13 16:02:39,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:39,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140351902] [2024-11-13 16:02:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:39,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:40,299 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:40,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:40,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:40,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140351902] [2024-11-13 16:02:40,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140351902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:40,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704665671] [2024-11-13 16:02:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:40,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:40,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:40,310 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:40,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 16:02:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:40,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 16:02:40,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:41,103 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:41,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704665671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:41,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:41,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2024-11-13 16:02:41,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855016676] [2024-11-13 16:02:41,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:41,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 16:02:41,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:41,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 16:02:41,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-11-13 16:02:41,713 INFO L87 Difference]: Start difference. First operand 252 states and 349 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 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) [2024-11-13 16:02:44,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 16:02:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:46,672 INFO L93 Difference]: Finished difference Result 527 states and 740 transitions. [2024-11-13 16:02:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 16:02:46,672 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 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 34 [2024-11-13 16:02:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:46,675 INFO L225 Difference]: With dead ends: 527 [2024-11-13 16:02:46,675 INFO L226 Difference]: Without dead ends: 451 [2024-11-13 16:02:46,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 16:02:46,679 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 297 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:46,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1378 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-13 16:02:46,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-11-13 16:02:46,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 263. [2024-11-13 16:02:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 245 states have (on average 1.379591836734694) internal successors, (338), 252 states have internal predecessors, (338), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:02:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 361 transitions. [2024-11-13 16:02:46,747 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 361 transitions. Word has length 34 [2024-11-13 16:02:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:46,748 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 361 transitions. [2024-11-13 16:02:46,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 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) [2024-11-13 16:02:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 361 transitions. [2024-11-13 16:02:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 16:02:46,752 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:46,753 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 16:02:46,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 16:02:46,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 16:02:46,953 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:46,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1705259647, now seen corresponding path program 2 times [2024-11-13 16:02:46,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:46,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119586245] [2024-11-13 16:02:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:46,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:47,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:47,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:02:47,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119586245] [2024-11-13 16:02:47,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119586245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512375525] [2024-11-13 16:02:47,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:02:47,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:47,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:47,462 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:47,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 16:02:47,608 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 16:02:47,609 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:02:47,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 16:02:47,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:02:47,685 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:02:47,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512375525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:47,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:02:47,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2024-11-13 16:02:47,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740628857] [2024-11-13 16:02:47,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:47,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:02:47,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:47,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:02:47,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:02:47,687 INFO L87 Difference]: Start difference. First operand 263 states and 361 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2024-11-13 16:02:47,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:47,822 INFO L93 Difference]: Finished difference Result 323 states and 439 transitions. [2024-11-13 16:02:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:02:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 35 [2024-11-13 16:02:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:47,824 INFO L225 Difference]: With dead ends: 323 [2024-11-13 16:02:47,825 INFO L226 Difference]: Without dead ends: 266 [2024-11-13 16:02:47,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:02:47,826 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:47,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 145 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:02:47,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-11-13 16:02:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 252. [2024-11-13 16:02:47,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 234 states have (on average 1.3717948717948718) internal successors, (321), 241 states have internal predecessors, (321), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:02:47,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 344 transitions. [2024-11-13 16:02:47,882 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 344 transitions. Word has length 35 [2024-11-13 16:02:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:47,882 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 344 transitions. [2024-11-13 16:02:47,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2024-11-13 16:02:47,882 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 344 transitions. [2024-11-13 16:02:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 16:02:47,884 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:47,885 INFO L215 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, 1, 1] [2024-11-13 16:02:47,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 16:02:48,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:48,086 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:48,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:48,086 INFO L85 PathProgramCache]: Analyzing trace with hash -758900634, now seen corresponding path program 1 times [2024-11-13 16:02:48,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:48,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324898037] [2024-11-13 16:02:48,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:48,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:48,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:48,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 16:02:48,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:48,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324898037] [2024-11-13 16:02:48,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324898037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:48,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992293276] [2024-11-13 16:02:48,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:48,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:48,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:48,466 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:48,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 16:02:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:48,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 16:02:48,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 16:02:48,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:49,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992293276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:49,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:49,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 12] total 23 [2024-11-13 16:02:49,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249306432] [2024-11-13 16:02:49,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:49,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 16:02:49,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 16:02:49,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-13 16:02:49,265 INFO L87 Difference]: Start difference. First operand 252 states and 344 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 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) [2024-11-13 16:02:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:50,139 INFO L93 Difference]: Finished difference Result 339 states and 462 transitions. [2024-11-13 16:02:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 16:02:50,140 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 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 40 [2024-11-13 16:02:50,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:50,142 INFO L225 Difference]: With dead ends: 339 [2024-11-13 16:02:50,142 INFO L226 Difference]: Without dead ends: 311 [2024-11-13 16:02:50,143 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2024-11-13 16:02:50,143 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 222 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:50,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 688 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 16:02:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-11-13 16:02:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 235. [2024-11-13 16:02:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 217 states have (on average 1.3640552995391706) internal successors, (296), 224 states have internal predecessors, (296), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:02:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 319 transitions. [2024-11-13 16:02:50,209 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 319 transitions. Word has length 40 [2024-11-13 16:02:50,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:50,209 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 319 transitions. [2024-11-13 16:02:50,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 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) [2024-11-13 16:02:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 319 transitions. [2024-11-13 16:02:50,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 16:02:50,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:50,211 INFO L215 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] [2024-11-13 16:02:50,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 16:02:50,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:50,415 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:50,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:50,415 INFO L85 PathProgramCache]: Analyzing trace with hash 360878370, now seen corresponding path program 1 times [2024-11-13 16:02:50,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:50,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642951288] [2024-11-13 16:02:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:50,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:50,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:50,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:50,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:50,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642951288] [2024-11-13 16:02:50,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642951288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:50,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162822715] [2024-11-13 16:02:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:50,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:50,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:50,821 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:50,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 16:02:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:50,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 16:02:50,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:51,167 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 16:02:51,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162822715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:51,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:51,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 22 [2024-11-13 16:02:51,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938038184] [2024-11-13 16:02:51,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:51,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 16:02:51,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 16:02:51,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-11-13 16:02:51,377 INFO L87 Difference]: Start difference. First operand 235 states and 319 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 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) [2024-11-13 16:02:52,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:52,134 INFO L93 Difference]: Finished difference Result 365 states and 494 transitions. [2024-11-13 16:02:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 16:02:52,135 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 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 40 [2024-11-13 16:02:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:52,137 INFO L225 Difference]: With dead ends: 365 [2024-11-13 16:02:52,137 INFO L226 Difference]: Without dead ends: 260 [2024-11-13 16:02:52,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2024-11-13 16:02:52,138 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 162 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:52,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 765 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 16:02:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-13 16:02:52,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 229. [2024-11-13 16:02:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 211 states have (on average 1.3364928909952607) internal successors, (282), 218 states have internal predecessors, (282), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:02:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 305 transitions. [2024-11-13 16:02:52,203 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 305 transitions. Word has length 40 [2024-11-13 16:02:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:52,204 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 305 transitions. [2024-11-13 16:02:52,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 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) [2024-11-13 16:02:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 305 transitions. [2024-11-13 16:02:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 16:02:52,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:52,205 INFO L215 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] [2024-11-13 16:02:52,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-13 16:02:52,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 16:02:52,410 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:52,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:52,410 INFO L85 PathProgramCache]: Analyzing trace with hash 173068409, now seen corresponding path program 2 times [2024-11-13 16:02:52,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:52,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431570321] [2024-11-13 16:02:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:52,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:52,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:52,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:02:52,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:52,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431570321] [2024-11-13 16:02:52,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431570321] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:52,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113843316] [2024-11-13 16:02:52,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:02:52,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:52,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:52,671 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:52,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 16:02:52,800 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:02:52,801 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:02:52,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 16:02:52,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:02:52,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:02:53,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113843316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:53,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:53,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-13 16:02:53,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647823701] [2024-11-13 16:02:53,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:53,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 16:02:53,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 16:02:53,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-13 16:02:53,087 INFO L87 Difference]: Start difference. First operand 229 states and 305 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 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) [2024-11-13 16:02:53,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:53,346 INFO L93 Difference]: Finished difference Result 292 states and 384 transitions. [2024-11-13 16:02:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 16:02:53,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 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 [2024-11-13 16:02:53,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:53,353 INFO L225 Difference]: With dead ends: 292 [2024-11-13 16:02:53,353 INFO L226 Difference]: Without dead ends: 215 [2024-11-13 16:02:53,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-11-13 16:02:53,356 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 58 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:53,356 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 484 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:02:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-13 16:02:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 202. [2024-11-13 16:02:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 184 states have (on average 1.298913043478261) internal successors, (239), 191 states have internal predecessors, (239), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:02:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 262 transitions. [2024-11-13 16:02:53,409 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 262 transitions. Word has length 41 [2024-11-13 16:02:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:53,410 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 262 transitions. [2024-11-13 16:02:53,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 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) [2024-11-13 16:02:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 262 transitions. [2024-11-13 16:02:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 16:02:53,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:53,411 INFO L215 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] [2024-11-13 16:02:53,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 16:02:53,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 16:02:53,612 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:53,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:53,613 INFO L85 PathProgramCache]: Analyzing trace with hash 906415485, now seen corresponding path program 1 times [2024-11-13 16:02:53,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:53,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737630130] [2024-11-13 16:02:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:53,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:54,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:54,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:02:54,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737630130] [2024-11-13 16:02:54,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737630130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234198956] [2024-11-13 16:02:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:54,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:54,414 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:54,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 16:02:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:54,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-13 16:02:54,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:54,649 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 [2024-11-13 16:02:55,068 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 [2024-11-13 16:02:55,072 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 [2024-11-13 16:02:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:55,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:55,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:02:55,605 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 [2024-11-13 16:02:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:02:55,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234198956] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:02:55,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:02:55,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 32 [2024-11-13 16:02:55,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969245677] [2024-11-13 16:02:55,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:55,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 16:02:55,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 16:02:55,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2024-11-13 16:02:55,754 INFO L87 Difference]: Start difference. First operand 202 states and 262 transitions. Second operand has 32 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 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) [2024-11-13 16:02:57,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:57,918 INFO L93 Difference]: Finished difference Result 364 states and 486 transitions. [2024-11-13 16:02:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 16:02:57,919 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 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 [2024-11-13 16:02:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:57,921 INFO L225 Difference]: With dead ends: 364 [2024-11-13 16:02:57,921 INFO L226 Difference]: Without dead ends: 315 [2024-11-13 16:02:57,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=392, Invalid=2470, Unknown=0, NotChecked=0, Total=2862 [2024-11-13 16:02:57,923 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 430 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:57,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 807 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 16:02:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-13 16:02:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 221. [2024-11-13 16:02:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 203 states have (on average 1.3103448275862069) internal successors, (266), 210 states have internal predecessors, (266), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:02:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 289 transitions. [2024-11-13 16:02:57,986 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 289 transitions. Word has length 41 [2024-11-13 16:02:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:57,987 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 289 transitions. [2024-11-13 16:02:57,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 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) [2024-11-13 16:02:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 289 transitions. [2024-11-13 16:02:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 16:02:57,988 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:57,989 INFO L215 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] [2024-11-13 16:02:58,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 16:02:58,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 16:02:58,193 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:58,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:58,193 INFO L85 PathProgramCache]: Analyzing trace with hash -411233146, now seen corresponding path program 2 times [2024-11-13 16:02:58,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:58,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993908296] [2024-11-13 16:02:58,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:58,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:58,579 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:58,582 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:02:58,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:58,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993908296] [2024-11-13 16:02:58,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993908296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:58,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976070370] [2024-11-13 16:02:58,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:02:58,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:58,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:58,590 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:58,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 16:02:58,720 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 16:02:58,720 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:02:58,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 16:02:58,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:02:58,952 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:02:58,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976070370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:02:58,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:02:58,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-13 16:02:58,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130963658] [2024-11-13 16:02:58,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:02:58,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:02:58,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:02:58,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:02:58,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:02:58,954 INFO L87 Difference]: Start difference. First operand 221 states and 289 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) [2024-11-13 16:02:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:59,090 INFO L93 Difference]: Finished difference Result 259 states and 337 transitions. [2024-11-13 16:02:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:02:59,091 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 [2024-11-13 16:02:59,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:59,093 INFO L225 Difference]: With dead ends: 259 [2024-11-13 16:02:59,093 INFO L226 Difference]: Without dead ends: 250 [2024-11-13 16:02:59,093 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:02:59,094 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:59,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 142 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:02:59,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-13 16:02:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 228. [2024-11-13 16:02:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 210 states have (on average 1.3095238095238095) internal successors, (275), 217 states have internal predecessors, (275), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:02:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 298 transitions. [2024-11-13 16:02:59,153 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 298 transitions. Word has length 42 [2024-11-13 16:02:59,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:59,153 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 298 transitions. [2024-11-13 16:02:59,154 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) [2024-11-13 16:02:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 298 transitions. [2024-11-13 16:02:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 16:02:59,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:59,155 INFO L215 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] [2024-11-13 16:02:59,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 16:02:59,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 16:02:59,356 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:59,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:59,356 INFO L85 PathProgramCache]: Analyzing trace with hash 708545858, now seen corresponding path program 3 times [2024-11-13 16:02:59,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:02:59,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738289240] [2024-11-13 16:02:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:02:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:02:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:59,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:02:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:59,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:02:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:02:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:02:59,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:02:59,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738289240] [2024-11-13 16:02:59,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738289240] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:59,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22941410] [2024-11-13 16:02:59,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:02:59,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:59,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:59,872 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:59,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 16:03:00,091 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 16:03:00,091 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:03:00,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 16:03:00,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:03:00,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:03:00,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22941410] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:00,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:00,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 23 [2024-11-13 16:03:00,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181960551] [2024-11-13 16:03:00,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:00,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 16:03:00,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:00,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 16:03:00,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-11-13 16:03:00,658 INFO L87 Difference]: Start difference. First operand 228 states and 298 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 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) [2024-11-13 16:03:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:02,318 INFO L93 Difference]: Finished difference Result 585 states and 788 transitions. [2024-11-13 16:03:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 16:03:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 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 [2024-11-13 16:03:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:02,322 INFO L225 Difference]: With dead ends: 585 [2024-11-13 16:03:02,322 INFO L226 Difference]: Without dead ends: 508 [2024-11-13 16:03:02,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 16:03:02,324 INFO L432 NwaCegarLoop]: 131 mSDtfsCounter, 209 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:02,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1692 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 16:03:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2024-11-13 16:03:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 312. [2024-11-13 16:03:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 294 states have (on average 1.3299319727891157) internal successors, (391), 301 states have internal predecessors, (391), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:03:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 414 transitions. [2024-11-13 16:03:02,435 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 414 transitions. Word has length 42 [2024-11-13 16:03:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:02,438 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 414 transitions. [2024-11-13 16:03:02,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 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) [2024-11-13 16:03:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 414 transitions. [2024-11-13 16:03:02,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 16:03:02,440 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:02,440 INFO L215 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, 1] [2024-11-13 16:03:02,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 16:03:02,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 16:03:02,641 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:02,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:02,644 INFO L85 PathProgramCache]: Analyzing trace with hash -662000984, now seen corresponding path program 1 times [2024-11-13 16:03:02,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:02,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573528065] [2024-11-13 16:03:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:02,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:02,782 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:02,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:02,787 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-13 16:03:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 16:03:02,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:02,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573528065] [2024-11-13 16:03:02,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573528065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:02,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029962233] [2024-11-13 16:03:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:02,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:02,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:02,794 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:02,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 16:03:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:02,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 16:03:02,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:03:03,096 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:03:03,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029962233] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:03,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:03:03,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7] total 13 [2024-11-13 16:03:03,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764707700] [2024-11-13 16:03:03,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:03:03,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:03:03,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:03,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:03:03,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:03:03,183 INFO L87 Difference]: Start difference. First operand 312 states and 414 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2024-11-13 16:03:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:03,326 INFO L93 Difference]: Finished difference Result 337 states and 448 transitions. [2024-11-13 16:03:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:03:03,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 44 [2024-11-13 16:03:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:03,329 INFO L225 Difference]: With dead ends: 337 [2024-11-13 16:03:03,329 INFO L226 Difference]: Without dead ends: 319 [2024-11-13 16:03:03,330 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:03:03,331 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 3 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:03,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 157 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:03:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2024-11-13 16:03:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 316. [2024-11-13 16:03:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 298 states have (on average 1.332214765100671) internal successors, (397), 305 states have internal predecessors, (397), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:03:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 420 transitions. [2024-11-13 16:03:03,426 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 420 transitions. Word has length 44 [2024-11-13 16:03:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:03,427 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 420 transitions. [2024-11-13 16:03:03,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2024-11-13 16:03:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 420 transitions. [2024-11-13 16:03:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 16:03:03,428 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:03,428 INFO L215 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] [2024-11-13 16:03:03,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-13 16:03:03,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 16:03:03,635 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:03,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:03,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1789083749, now seen corresponding path program 1 times [2024-11-13 16:03:03,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:03,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610631922] [2024-11-13 16:03:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:03,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:04,921 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:04,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:03:04,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:04,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610631922] [2024-11-13 16:03:04,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610631922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:04,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198380081] [2024-11-13 16:03:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:04,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:04,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:04,929 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:04,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 16:03:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:05,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-13 16:03:05,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:05,336 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 [2024-11-13 16:03:05,435 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 [2024-11-13 16:03:05,489 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 [2024-11-13 16:03:06,350 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 [2024-11-13 16:03:06,353 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 [2024-11-13 16:03:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:03:06,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:03:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198380081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:07,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:07,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 13] total 46 [2024-11-13 16:03:07,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702061139] [2024-11-13 16:03:07,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:07,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-13 16:03:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:07,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-13 16:03:07,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 16:03:07,272 INFO L87 Difference]: Start difference. First operand 316 states and 420 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 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) [2024-11-13 16:03:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:09,399 INFO L93 Difference]: Finished difference Result 534 states and 713 transitions. [2024-11-13 16:03:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-13 16:03:09,400 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 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 45 [2024-11-13 16:03:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:09,403 INFO L225 Difference]: With dead ends: 534 [2024-11-13 16:03:09,403 INFO L226 Difference]: Without dead ends: 395 [2024-11-13 16:03:09,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=487, Invalid=3545, Unknown=0, NotChecked=0, Total=4032 [2024-11-13 16:03:09,405 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 195 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:09,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1074 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 16:03:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-11-13 16:03:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 342. [2024-11-13 16:03:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 324 states have (on average 1.3240740740740742) internal successors, (429), 331 states have internal predecessors, (429), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:03:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 452 transitions. [2024-11-13 16:03:09,502 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 452 transitions. Word has length 45 [2024-11-13 16:03:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:09,502 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 452 transitions. [2024-11-13 16:03:09,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 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) [2024-11-13 16:03:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 452 transitions. [2024-11-13 16:03:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 16:03:09,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:09,504 INFO L215 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, 1] [2024-11-13 16:03:09,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 16:03:09,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:09,707 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:09,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:09,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1839339114, now seen corresponding path program 1 times [2024-11-13 16:03:09,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:09,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537716935] [2024-11-13 16:03:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:09,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:09,779 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:09,782 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:09,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-13 16:03:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:03:09,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:09,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537716935] [2024-11-13 16:03:09,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537716935] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:03:09,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:03:09,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:03:09,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019905584] [2024-11-13 16:03:09,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:03:09,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:03:09,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:09,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:03:09,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:03:09,790 INFO L87 Difference]: Start difference. First operand 342 states and 452 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-11-13 16:03:09,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:09,924 INFO L93 Difference]: Finished difference Result 362 states and 476 transitions. [2024-11-13 16:03:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:03:09,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 49 [2024-11-13 16:03:09,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:09,927 INFO L225 Difference]: With dead ends: 362 [2024-11-13 16:03:09,927 INFO L226 Difference]: Without dead ends: 343 [2024-11-13 16:03:09,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:03:09,928 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:09,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 163 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:03:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-13 16:03:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2024-11-13 16:03:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 323 states have (on average 1.3188854489164086) internal successors, (426), 329 states have internal predecessors, (426), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:03:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 449 transitions. [2024-11-13 16:03:10,078 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 449 transitions. Word has length 49 [2024-11-13 16:03:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:10,079 INFO L471 AbstractCegarLoop]: Abstraction has 341 states and 449 transitions. [2024-11-13 16:03:10,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-11-13 16:03:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 449 transitions. [2024-11-13 16:03:10,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 16:03:10,081 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:10,081 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-13 16:03:10,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-13 16:03:10,085 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:10,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:10,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1471506741, now seen corresponding path program 1 times [2024-11-13 16:03:10,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:10,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047939709] [2024-11-13 16:03:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:10,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:10,492 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:10,494 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:03:10,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:10,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047939709] [2024-11-13 16:03:10,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047939709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:10,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416942716] [2024-11-13 16:03:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:10,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:10,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:10,502 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:10,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 16:03:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:10,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 16:03:10,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:03:11,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:03:11,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416942716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:11,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:11,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2024-11-13 16:03:11,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288335050] [2024-11-13 16:03:11,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:11,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 16:03:11,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 16:03:11,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2024-11-13 16:03:11,318 INFO L87 Difference]: Start difference. First operand 341 states and 449 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 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) [2024-11-13 16:03:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:12,497 INFO L93 Difference]: Finished difference Result 718 states and 945 transitions. [2024-11-13 16:03:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 16:03:12,497 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 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 [2024-11-13 16:03:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:12,499 INFO L225 Difference]: With dead ends: 718 [2024-11-13 16:03:12,500 INFO L226 Difference]: Without dead ends: 510 [2024-11-13 16:03:12,501 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 16:03:12,501 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 189 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:12,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 1282 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 16:03:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2024-11-13 16:03:12,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 312. [2024-11-13 16:03:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 294 states have (on average 1.2789115646258504) internal successors, (376), 300 states have internal predecessors, (376), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:03:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 399 transitions. [2024-11-13 16:03:12,666 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 399 transitions. Word has length 48 [2024-11-13 16:03:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:12,667 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 399 transitions. [2024-11-13 16:03:12,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 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) [2024-11-13 16:03:12,667 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 399 transitions. [2024-11-13 16:03:12,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 16:03:12,668 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:12,669 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-13 16:03:12,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 16:03:12,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:12,869 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:12,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:12,870 INFO L85 PathProgramCache]: Analyzing trace with hash 727752710, now seen corresponding path program 1 times [2024-11-13 16:03:12,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:12,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661611926] [2024-11-13 16:03:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:12,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:14,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:14,141 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:03:14,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:14,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661611926] [2024-11-13 16:03:14,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661611926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:14,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054321921] [2024-11-13 16:03:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:14,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:14,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:14,147 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:14,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 16:03:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:14,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-13 16:03:14,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:14,372 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 [2024-11-13 16:03:14,427 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 [2024-11-13 16:03:14,866 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 [2024-11-13 16:03:14,869 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 [2024-11-13 16:03:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:03:14,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 16:03:15,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054321921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:15,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:15,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2024-11-13 16:03:15,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087294883] [2024-11-13 16:03:15,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:15,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-13 16:03:15,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:15,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-13 16:03:15,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 16:03:15,531 INFO L87 Difference]: Start difference. First operand 312 states and 399 transitions. Second operand has 38 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 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) [2024-11-13 16:03:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:16,728 INFO L93 Difference]: Finished difference Result 480 states and 623 transitions. [2024-11-13 16:03:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 16:03:16,728 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 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 49 [2024-11-13 16:03:16,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:16,730 INFO L225 Difference]: With dead ends: 480 [2024-11-13 16:03:16,730 INFO L226 Difference]: Without dead ends: 431 [2024-11-13 16:03:16,732 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=291, Invalid=1871, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 16:03:16,733 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 179 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1584 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:16,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1584 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 16:03:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2024-11-13 16:03:16,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 336. [2024-11-13 16:03:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 318 states have (on average 1.2830188679245282) internal successors, (408), 324 states have internal predecessors, (408), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:03:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 431 transitions. [2024-11-13 16:03:16,844 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 431 transitions. Word has length 49 [2024-11-13 16:03:16,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:16,844 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 431 transitions. [2024-11-13 16:03:16,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 37 states have internal predecessors, (100), 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) [2024-11-13 16:03:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 431 transitions. [2024-11-13 16:03:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 16:03:16,846 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:16,846 INFO L215 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, 1] [2024-11-13 16:03:16,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-13 16:03:17,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:17,050 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:17,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash 502823104, now seen corresponding path program 1 times [2024-11-13 16:03:17,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:17,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228717086] [2024-11-13 16:03:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:17,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:17,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:17,245 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:17,247 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-13 16:03:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:17,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-13 16:03:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:03:17,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:17,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228717086] [2024-11-13 16:03:17,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228717086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:17,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31027495] [2024-11-13 16:03:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:17,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:17,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:17,256 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:17,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 16:03:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:17,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:03:17,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 16:03:17,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 16:03:17,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31027495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:17,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:17,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-13 16:03:17,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326982483] [2024-11-13 16:03:17,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:17,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 16:03:17,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:17,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 16:03:17,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:03:17,724 INFO L87 Difference]: Start difference. First operand 336 states and 431 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 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) [2024-11-13 16:03:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:18,155 INFO L93 Difference]: Finished difference Result 397 states and 508 transitions. [2024-11-13 16:03:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 16:03:18,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 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 52 [2024-11-13 16:03:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:18,157 INFO L225 Difference]: With dead ends: 397 [2024-11-13 16:03:18,157 INFO L226 Difference]: Without dead ends: 319 [2024-11-13 16:03:18,158 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-13 16:03:18,158 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 11 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:18,159 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 571 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:03:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2024-11-13 16:03:18,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 312. [2024-11-13 16:03:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 295 states have (on average 1.2813559322033898) internal successors, (378), 300 states have internal predecessors, (378), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:03:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 401 transitions. [2024-11-13 16:03:18,259 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 401 transitions. Word has length 52 [2024-11-13 16:03:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:18,260 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 401 transitions. [2024-11-13 16:03:18,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 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) [2024-11-13 16:03:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 401 transitions. [2024-11-13 16:03:18,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 16:03:18,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:18,261 INFO L215 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] [2024-11-13 16:03:18,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 16:03:18,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:18,462 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:18,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:18,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1789175701, now seen corresponding path program 2 times [2024-11-13 16:03:18,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:18,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056430053] [2024-11-13 16:03:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:18,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:18,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:18,964 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:03:18,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:18,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056430053] [2024-11-13 16:03:18,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056430053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:18,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609868756] [2024-11-13 16:03:18,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:03:18,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:18,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:18,971 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:18,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 16:03:19,127 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:03:19,127 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:03:19,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 16:03:19,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:03:19,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:03:19,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609868756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:19,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:19,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2024-11-13 16:03:19,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091975724] [2024-11-13 16:03:19,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:19,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 16:03:19,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:19,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 16:03:19,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2024-11-13 16:03:19,656 INFO L87 Difference]: Start difference. First operand 312 states and 401 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 29 states have internal predecessors, (88), 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) [2024-11-13 16:03:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:21,445 INFO L93 Difference]: Finished difference Result 568 states and 740 transitions. [2024-11-13 16:03:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-13 16:03:21,446 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 29 states have internal predecessors, (88), 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 50 [2024-11-13 16:03:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:21,448 INFO L225 Difference]: With dead ends: 568 [2024-11-13 16:03:21,448 INFO L226 Difference]: Without dead ends: 528 [2024-11-13 16:03:21,449 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=424, Invalid=2332, Unknown=0, NotChecked=0, Total=2756 [2024-11-13 16:03:21,449 INFO L432 NwaCegarLoop]: 152 mSDtfsCounter, 313 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:21,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1994 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 16:03:21,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2024-11-13 16:03:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 326. [2024-11-13 16:03:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 309 states have (on average 1.2815533980582525) internal successors, (396), 314 states have internal predecessors, (396), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:03:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 419 transitions. [2024-11-13 16:03:21,540 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 419 transitions. Word has length 50 [2024-11-13 16:03:21,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:21,540 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 419 transitions. [2024-11-13 16:03:21,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 29 states have internal predecessors, (88), 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) [2024-11-13 16:03:21,541 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 419 transitions. [2024-11-13 16:03:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 16:03:21,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:21,542 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-11-13 16:03:21,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-13 16:03:21,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:21,742 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:21,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:21,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1613098759, now seen corresponding path program 4 times [2024-11-13 16:03:21,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:21,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199981377] [2024-11-13 16:03:21,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:21,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:21,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:21,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 16:03:21,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:21,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199981377] [2024-11-13 16:03:21,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199981377] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:21,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333821348] [2024-11-13 16:03:21,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:03:21,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:21,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:21,962 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:21,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 16:03:22,108 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:03:22,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:03:22,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 16:03:22,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 16:03:22,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 16:03:22,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333821348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:22,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:22,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-11-13 16:03:22,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443519535] [2024-11-13 16:03:22,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:22,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 16:03:22,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:22,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 16:03:22,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2024-11-13 16:03:22,482 INFO L87 Difference]: Start difference. First operand 326 states and 419 transitions. Second operand has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 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) [2024-11-13 16:03:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:23,046 INFO L93 Difference]: Finished difference Result 404 states and 513 transitions. [2024-11-13 16:03:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 16:03:23,046 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 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 51 [2024-11-13 16:03:23,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:23,049 INFO L225 Difference]: With dead ends: 404 [2024-11-13 16:03:23,049 INFO L226 Difference]: Without dead ends: 339 [2024-11-13 16:03:23,049 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-11-13 16:03:23,050 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 37 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:23,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1092 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:03:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-11-13 16:03:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 299. [2024-11-13 16:03:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 282 states have (on average 1.2765957446808511) internal successors, (360), 287 states have internal predecessors, (360), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-13 16:03:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 383 transitions. [2024-11-13 16:03:23,125 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 383 transitions. Word has length 51 [2024-11-13 16:03:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:23,125 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 383 transitions. [2024-11-13 16:03:23,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 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) [2024-11-13 16:03:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 383 transitions. [2024-11-13 16:03:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 16:03:23,126 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:23,126 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:03:23,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 16:03:23,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:23,327 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:23,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1932037763, now seen corresponding path program 1 times [2024-11-13 16:03:23,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:23,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683468523] [2024-11-13 16:03:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:23,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:23,541 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:23,543 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:23,545 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 16:03:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:23,548 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-11-13 16:03:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:03:23,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:23,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683468523] [2024-11-13 16:03:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683468523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339911630] [2024-11-13 16:03:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:23,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:23,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:23,555 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:23,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 16:03:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:23,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 16:03:23,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 16:03:23,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:03:23,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339911630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:23,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:23,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2024-11-13 16:03:23,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444589548] [2024-11-13 16:03:23,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:23,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 16:03:23,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 16:03:23,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-13 16:03:23,997 INFO L87 Difference]: Start difference. First operand 299 states and 383 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 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) [2024-11-13 16:03:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:24,332 INFO L93 Difference]: Finished difference Result 347 states and 445 transitions. [2024-11-13 16:03:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 16:03:24,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 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 [2024-11-13 16:03:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:24,335 INFO L225 Difference]: With dead ends: 347 [2024-11-13 16:03:24,335 INFO L226 Difference]: Without dead ends: 288 [2024-11-13 16:03:24,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-13 16:03:24,336 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 25 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:24,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 491 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 16:03:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-11-13 16:03:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 220. [2024-11-13 16:03:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 208 states have (on average 1.2932692307692308) internal successors, (269), 211 states have internal predecessors, (269), 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) [2024-11-13 16:03:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 284 transitions. [2024-11-13 16:03:24,430 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 284 transitions. Word has length 54 [2024-11-13 16:03:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:24,431 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 284 transitions. [2024-11-13 16:03:24,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 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) [2024-11-13 16:03:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 284 transitions. [2024-11-13 16:03:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 16:03:24,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:24,433 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 16:03:24,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 16:03:24,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-13 16:03:24,634 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:24,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1103644718, now seen corresponding path program 3 times [2024-11-13 16:03:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:24,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267396504] [2024-11-13 16:03:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:24,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:26,290 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:26,293 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:03:26,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:26,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267396504] [2024-11-13 16:03:26,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267396504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:26,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488524616] [2024-11-13 16:03:26,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:03:26,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:26,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:26,301 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:26,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 16:03:26,535 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 16:03:26,535 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:03:26,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-13 16:03:26,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:26,565 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 [2024-11-13 16:03:26,653 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 [2024-11-13 16:03:26,690 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 [2024-11-13 16:03:27,040 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 [2024-11-13 16:03:27,043 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 [2024-11-13 16:03:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:03:27,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:03:28,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488524616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:28,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:28,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 18] total 41 [2024-11-13 16:03:28,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832839154] [2024-11-13 16:03:28,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:28,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-13 16:03:28,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:28,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-13 16:03:28,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 16:03:28,238 INFO L87 Difference]: Start difference. First operand 220 states and 284 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 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) [2024-11-13 16:03:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:29,825 INFO L93 Difference]: Finished difference Result 351 states and 451 transitions. [2024-11-13 16:03:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 16:03:29,825 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 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 53 [2024-11-13 16:03:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:29,827 INFO L225 Difference]: With dead ends: 351 [2024-11-13 16:03:29,827 INFO L226 Difference]: Without dead ends: 258 [2024-11-13 16:03:29,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 16:03:29,828 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 139 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:29,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1169 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 16:03:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-13 16:03:29,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 232. [2024-11-13 16:03:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 220 states have (on average 1.290909090909091) internal successors, (284), 223 states have internal predecessors, (284), 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) [2024-11-13 16:03:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 299 transitions. [2024-11-13 16:03:29,937 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 299 transitions. Word has length 53 [2024-11-13 16:03:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:29,937 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 299 transitions. [2024-11-13 16:03:29,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 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) [2024-11-13 16:03:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 299 transitions. [2024-11-13 16:03:29,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 16:03:29,943 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:29,943 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 16:03:29,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 16:03:30,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:30,144 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:30,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1584876582, now seen corresponding path program 4 times [2024-11-13 16:03:30,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:30,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839038196] [2024-11-13 16:03:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:30,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:31,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:31,900 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:03:31,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:31,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839038196] [2024-11-13 16:03:31,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839038196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:31,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028466098] [2024-11-13 16:03:31,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:03:31,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:31,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:31,906 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:31,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 16:03:32,105 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:03:32,105 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:03:32,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-13 16:03:32,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:32,590 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 [2024-11-13 16:03:32,599 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 [2024-11-13 16:03:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:03:32,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:33,356 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:03:33,357 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 [2024-11-13 16:03:33,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:03:33,372 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 [2024-11-13 16:03:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:03:33,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028466098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:33,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:33,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 39 [2024-11-13 16:03:33,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733251822] [2024-11-13 16:03:33,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:33,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 16:03:33,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:33,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 16:03:33,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 16:03:33,834 INFO L87 Difference]: Start difference. First operand 232 states and 299 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 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) [2024-11-13 16:03:35,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:35,282 INFO L93 Difference]: Finished difference Result 383 states and 492 transitions. [2024-11-13 16:03:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 16:03:35,282 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 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 53 [2024-11-13 16:03:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:35,284 INFO L225 Difference]: With dead ends: 383 [2024-11-13 16:03:35,284 INFO L226 Difference]: Without dead ends: 284 [2024-11-13 16:03:35,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=257, Invalid=1999, Unknown=0, NotChecked=0, Total=2256 [2024-11-13 16:03:35,286 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 163 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:35,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 999 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-13 16:03:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-11-13 16:03:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 241. [2024-11-13 16:03:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 229 states have (on average 1.2925764192139737) internal successors, (296), 232 states have internal predecessors, (296), 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) [2024-11-13 16:03:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 311 transitions. [2024-11-13 16:03:35,398 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 311 transitions. Word has length 53 [2024-11-13 16:03:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:35,399 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 311 transitions. [2024-11-13 16:03:35,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 states have internal predecessors, (88), 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) [2024-11-13 16:03:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 311 transitions. [2024-11-13 16:03:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 16:03:35,400 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:35,400 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 16:03:35,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-13 16:03:35,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:35,601 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:35,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:35,602 INFO L85 PathProgramCache]: Analyzing trace with hash 46847466, now seen corresponding path program 5 times [2024-11-13 16:03:35,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:35,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308460556] [2024-11-13 16:03:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:35,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:37,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:37,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:03:37,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:37,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308460556] [2024-11-13 16:03:37,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308460556] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:37,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103323032] [2024-11-13 16:03:37,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:03:37,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:37,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:37,405 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:37,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 16:03:37,944 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 16:03:37,944 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:03:37,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-13 16:03:37,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:38,131 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 [2024-11-13 16:03:39,254 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 [2024-11-13 16:03:39,258 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 [2024-11-13 16:03:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:03:39,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:40,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:03:40,985 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 40 [2024-11-13 16:03:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:03:41,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103323032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:41,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:41,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 20] total 58 [2024-11-13 16:03:41,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832884222] [2024-11-13 16:03:41,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:41,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-13 16:03:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-13 16:03:41,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2967, Unknown=0, NotChecked=0, Total=3306 [2024-11-13 16:03:41,387 INFO L87 Difference]: Start difference. First operand 241 states and 311 transitions. Second operand has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 56 states have internal predecessors, (113), 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) [2024-11-13 16:03:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:47,053 INFO L93 Difference]: Finished difference Result 376 states and 485 transitions. [2024-11-13 16:03:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-13 16:03:47,053 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 56 states have internal predecessors, (113), 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 53 [2024-11-13 16:03:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:47,055 INFO L225 Difference]: With dead ends: 376 [2024-11-13 16:03:47,055 INFO L226 Difference]: Without dead ends: 343 [2024-11-13 16:03:47,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=998, Invalid=7558, Unknown=0, NotChecked=0, Total=8556 [2024-11-13 16:03:47,057 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 176 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:47,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1209 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-13 16:03:47,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-13 16:03:47,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 261. [2024-11-13 16:03:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 249 states have (on average 1.3012048192771084) internal successors, (324), 252 states have internal predecessors, (324), 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) [2024-11-13 16:03:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 339 transitions. [2024-11-13 16:03:47,128 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 339 transitions. Word has length 53 [2024-11-13 16:03:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:47,128 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 339 transitions. [2024-11-13 16:03:47,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 56 states have internal predecessors, (113), 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) [2024-11-13 16:03:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 339 transitions. [2024-11-13 16:03:47,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-13 16:03:47,129 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:47,129 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:03:47,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 16:03:47,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-13 16:03:47,330 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:47,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:47,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1412612449, now seen corresponding path program 1 times [2024-11-13 16:03:47,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:47,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810265845] [2024-11-13 16:03:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:47,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:47,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:47,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:47,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-13 16:03:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:47,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-13 16:03:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:03:47,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810265845] [2024-11-13 16:03:47,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810265845] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:47,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353351200] [2024-11-13 16:03:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:47,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:47,729 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:47,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 16:03:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:47,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 16:03:47,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:03:48,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:03:48,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353351200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:48,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:48,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-11-13 16:03:48,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633349766] [2024-11-13 16:03:48,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:48,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 16:03:48,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:48,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 16:03:48,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-11-13 16:03:48,462 INFO L87 Difference]: Start difference. First operand 261 states and 339 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 16:03:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:52,976 INFO L93 Difference]: Finished difference Result 377 states and 488 transitions. [2024-11-13 16:03:52,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 16:03:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 56 [2024-11-13 16:03:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:52,979 INFO L225 Difference]: With dead ends: 377 [2024-11-13 16:03:52,979 INFO L226 Difference]: Without dead ends: 341 [2024-11-13 16:03:52,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-11-13 16:03:52,980 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 59 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:52,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 658 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:03:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2024-11-13 16:03:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 274. [2024-11-13 16:03:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 262 states have (on average 1.2786259541984732) internal successors, (335), 265 states have internal predecessors, (335), 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) [2024-11-13 16:03:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 350 transitions. [2024-11-13 16:03:53,059 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 350 transitions. Word has length 56 [2024-11-13 16:03:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:53,059 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 350 transitions. [2024-11-13 16:03:53,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 16:03:53,060 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 350 transitions. [2024-11-13 16:03:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-13 16:03:53,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:53,061 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2024-11-13 16:03:53,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-13 16:03:53,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-13 16:03:53,262 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:53,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:53,262 INFO L85 PathProgramCache]: Analyzing trace with hash -292208650, now seen corresponding path program 2 times [2024-11-13 16:03:53,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:03:53,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415724665] [2024-11-13 16:03:53,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:03:53,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:03:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:54,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:03:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:54,144 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:03:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:54,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-13 16:03:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:54,149 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-13 16:03:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:03:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:03:54,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:03:54,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415724665] [2024-11-13 16:03:54,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415724665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:54,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949285610] [2024-11-13 16:03:54,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:03:54,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:54,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:54,155 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:54,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 16:03:54,375 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:03:54,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:03:54,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-13 16:03:54,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:58,784 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 [2024-11-13 16:03:59,028 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 [2024-11-13 16:03:59,033 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 [2024-11-13 16:03:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 16:03:59,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:59,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:03:59,429 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 [2024-11-13 16:03:59,443 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:03:59,443 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 [2024-11-13 16:03:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 16:03:59,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949285610] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:59,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:03:59,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 30 [2024-11-13 16:03:59,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12299052] [2024-11-13 16:03:59,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:59,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 16:03:59,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:03:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 16:03:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=734, Unknown=1, NotChecked=54, Total=870 [2024-11-13 16:03:59,616 INFO L87 Difference]: Start difference. First operand 274 states and 350 transitions. Second operand has 30 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 30 states have internal predecessors, (92), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-13 16:04:07,948 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 [] [2024-11-13 16:04:10,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 16:04:14,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 16:04:17,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 16:04:23,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 16:04:29,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 16:04:31,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 16:04:32,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:04:32,551 INFO L93 Difference]: Finished difference Result 713 states and 918 transitions. [2024-11-13 16:04:32,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 16:04:32,552 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 30 states have internal predecessors, (92), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2024-11-13 16:04:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:04:32,553 INFO L225 Difference]: With dead ends: 713 [2024-11-13 16:04:32,554 INFO L226 Difference]: Without dead ends: 630 [2024-11-13 16:04:32,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=445, Invalid=3098, Unknown=1, NotChecked=116, Total=3660 [2024-11-13 16:04:32,555 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 275 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 25 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:04:32,555 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1658 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1760 Invalid, 3 Unknown, 381 Unchecked, 29.1s Time] [2024-11-13 16:04:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2024-11-13 16:04:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 420. [2024-11-13 16:04:32,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 406 states have (on average 1.2881773399014778) internal successors, (523), 409 states have internal predecessors, (523), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 16:04:32,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 540 transitions. [2024-11-13 16:04:32,736 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 540 transitions. Word has length 57 [2024-11-13 16:04:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:04:32,737 INFO L471 AbstractCegarLoop]: Abstraction has 420 states and 540 transitions. [2024-11-13 16:04:32,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 30 states have internal predecessors, (92), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-13 16:04:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 540 transitions. [2024-11-13 16:04:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 16:04:32,739 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:04:32,739 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1] [2024-11-13 16:04:32,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-13 16:04:32,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-13 16:04:32,940 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:04:32,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:04:32,940 INFO L85 PathProgramCache]: Analyzing trace with hash 12604059, now seen corresponding path program 1 times [2024-11-13 16:04:32,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:04:32,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707224947] [2024-11-13 16:04:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:04:32,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:04:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:33,237 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:04:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:33,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:04:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 16:04:33,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:04:33,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707224947] [2024-11-13 16:04:33,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707224947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:04:33,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782596139] [2024-11-13 16:04:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:04:33,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:04:33,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:04:33,247 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:04:33,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 16:04:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:33,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 16:04:33,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:04:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:04:33,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:04:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 16:04:34,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782596139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:04:34,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:04:34,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-11-13 16:04:34,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635264179] [2024-11-13 16:04:34,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:04:34,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 16:04:34,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:04:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 16:04:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2024-11-13 16:04:34,172 INFO L87 Difference]: Start difference. First operand 420 states and 540 transitions. Second operand has 26 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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) [2024-11-13 16:04:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:04:35,214 INFO L93 Difference]: Finished difference Result 560 states and 715 transitions. [2024-11-13 16:04:35,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 16:04:35,215 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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 55 [2024-11-13 16:04:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:04:35,217 INFO L225 Difference]: With dead ends: 560 [2024-11-13 16:04:35,217 INFO L226 Difference]: Without dead ends: 473 [2024-11-13 16:04:35,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 16:04:35,218 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 46 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:04:35,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1543 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 16:04:35,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2024-11-13 16:04:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 406. [2024-11-13 16:04:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 392 states have (on average 1.3010204081632653) internal successors, (510), 395 states have internal predecessors, (510), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 16:04:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 527 transitions. [2024-11-13 16:04:35,409 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 527 transitions. Word has length 55 [2024-11-13 16:04:35,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:04:35,410 INFO L471 AbstractCegarLoop]: Abstraction has 406 states and 527 transitions. [2024-11-13 16:04:35,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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) [2024-11-13 16:04:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 527 transitions. [2024-11-13 16:04:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-13 16:04:35,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:04:35,412 INFO L215 NwaCegarLoop]: trace histogram [4, 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] [2024-11-13 16:04:35,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-13 16:04:35,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-13 16:04:35,616 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:04:35,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:04:35,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1694505538, now seen corresponding path program 6 times [2024-11-13 16:04:35,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:04:35,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803830970] [2024-11-13 16:04:35,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:04:35,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:04:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:36,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:04:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:36,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:04:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 16:04:36,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:04:36,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803830970] [2024-11-13 16:04:36,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803830970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:04:36,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143218263] [2024-11-13 16:04:36,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 16:04:36,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:04:36,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:04:36,154 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:04:36,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 16:04:36,680 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-13 16:04:36,680 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:04:36,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 16:04:36,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:04:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 16:04:37,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:04:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 16:04:38,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143218263] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:04:38,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:04:38,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2024-11-13 16:04:38,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880265254] [2024-11-13 16:04:38,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:04:38,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 16:04:38,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:04:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 16:04:38,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2024-11-13 16:04:38,001 INFO L87 Difference]: Start difference. First operand 406 states and 527 transitions. Second operand has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 31 states have internal predecessors, (98), 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) [2024-11-13 16:04:39,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:04:39,389 INFO L93 Difference]: Finished difference Result 986 states and 1287 transitions. [2024-11-13 16:04:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 16:04:39,390 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 31 states have internal predecessors, (98), 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 56 [2024-11-13 16:04:39,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:04:39,393 INFO L225 Difference]: With dead ends: 986 [2024-11-13 16:04:39,393 INFO L226 Difference]: Without dead ends: 710 [2024-11-13 16:04:39,393 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 16:04:39,394 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 139 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:04:39,394 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 1264 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 16:04:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2024-11-13 16:04:39,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 456. [2024-11-13 16:04:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 442 states have (on average 1.3144796380090498) internal successors, (581), 445 states have internal predecessors, (581), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 16:04:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2024-11-13 16:04:39,624 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 56 [2024-11-13 16:04:39,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:04:39,624 INFO L471 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2024-11-13 16:04:39,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.161290322580645) internal successors, (98), 31 states have internal predecessors, (98), 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) [2024-11-13 16:04:39,625 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2024-11-13 16:04:39,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-13 16:04:39,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:04:39,627 INFO L215 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] [2024-11-13 16:04:39,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 16:04:39,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:04:39,837 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:04:39,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:04:39,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1654091188, now seen corresponding path program 1 times [2024-11-13 16:04:39,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:04:39,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741493904] [2024-11-13 16:04:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:04:39,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:04:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:40,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:04:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:40,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:04:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:40,887 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 16:04:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:40,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-13 16:04:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:04:40,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:04:40,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741493904] [2024-11-13 16:04:40,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741493904] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:04:40,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403438716] [2024-11-13 16:04:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:04:40,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:04:40,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:04:40,900 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:04:40,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 16:04:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:41,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 16:04:41,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:04:41,144 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 [2024-11-13 16:04:42,061 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 [2024-11-13 16:04:42,068 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 [2024-11-13 16:04:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:04:42,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:04:42,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:04:42,458 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 [2024-11-13 16:04:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 16:04:42,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403438716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:04:42,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:04:42,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 13] total 33 [2024-11-13 16:04:42,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383349727] [2024-11-13 16:04:42,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:04:42,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 16:04:42,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:04:42,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 16:04:42,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 16:04:42,758 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand has 33 states, 32 states have (on average 3.1875) internal successors, (102), 31 states have internal predecessors, (102), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 16:04:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:04:44,890 INFO L93 Difference]: Finished difference Result 750 states and 982 transitions. [2024-11-13 16:04:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 16:04:44,891 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.1875) internal successors, (102), 31 states have internal predecessors, (102), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 59 [2024-11-13 16:04:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:04:44,894 INFO L225 Difference]: With dead ends: 750 [2024-11-13 16:04:44,895 INFO L226 Difference]: Without dead ends: 611 [2024-11-13 16:04:44,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 106 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=208, Invalid=1432, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 16:04:44,896 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 140 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:04:44,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1620 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 16:04:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2024-11-13 16:04:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 597. [2024-11-13 16:04:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 571 states have (on average 1.308231173380035) internal successors, (747), 578 states have internal predecessors, (747), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-13 16:04:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 779 transitions. [2024-11-13 16:04:45,151 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 779 transitions. Word has length 59 [2024-11-13 16:04:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:04:45,151 INFO L471 AbstractCegarLoop]: Abstraction has 597 states and 779 transitions. [2024-11-13 16:04:45,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.1875) internal successors, (102), 31 states have internal predecessors, (102), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-13 16:04:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 779 transitions. [2024-11-13 16:04:45,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-13 16:04:45,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:04:45,154 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 16:04:45,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 16:04:45,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:04:45,354 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:04:45,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:04:45,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1480057959, now seen corresponding path program 7 times [2024-11-13 16:04:45,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:04:45,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971435435] [2024-11-13 16:04:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:04:45,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:04:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:45,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:04:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:45,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:04:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-13 16:04:45,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:04:45,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971435435] [2024-11-13 16:04:45,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971435435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:04:45,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953123325] [2024-11-13 16:04:45,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 16:04:45,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:04:45,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:04:45,913 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:04:45,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-13 16:04:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:46,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 16:04:46,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:04:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-13 16:04:46,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:04:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-13 16:04:47,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953123325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:04:47,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:04:47,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2024-11-13 16:04:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812508900] [2024-11-13 16:04:47,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:04:47,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 16:04:47,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:04:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 16:04:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-11-13 16:04:47,089 INFO L87 Difference]: Start difference. First operand 597 states and 779 transitions. Second operand has 28 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 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) [2024-11-13 16:04:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:04:48,533 INFO L93 Difference]: Finished difference Result 851 states and 1110 transitions. [2024-11-13 16:04:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 16:04:48,533 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 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 57 [2024-11-13 16:04:48,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:04:48,537 INFO L225 Difference]: With dead ends: 851 [2024-11-13 16:04:48,538 INFO L226 Difference]: Without dead ends: 650 [2024-11-13 16:04:48,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 16:04:48,540 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 123 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 16:04:48,540 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1408 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 16:04:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2024-11-13 16:04:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 501. [2024-11-13 16:04:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 475 states have (on average 1.2926315789473684) internal successors, (614), 482 states have internal predecessors, (614), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-13 16:04:48,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 646 transitions. [2024-11-13 16:04:48,831 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 646 transitions. Word has length 57 [2024-11-13 16:04:48,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:04:48,832 INFO L471 AbstractCegarLoop]: Abstraction has 501 states and 646 transitions. [2024-11-13 16:04:48,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 28 states have internal predecessors, (77), 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) [2024-11-13 16:04:48,832 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 646 transitions. [2024-11-13 16:04:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-13 16:04:48,834 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:04:48,834 INFO L215 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2024-11-13 16:04:48,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-13 16:04:49,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:04:49,035 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:04:49,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:04:49,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1018705779, now seen corresponding path program 1 times [2024-11-13 16:04:49,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:04:49,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927634790] [2024-11-13 16:04:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:04:49,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:04:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:49,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:04:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:49,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:04:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:49,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 16:04:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:49,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-13 16:04:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:04:49,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:04:49,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927634790] [2024-11-13 16:04:49,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927634790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:04:49,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132242251] [2024-11-13 16:04:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:04:49,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:04:49,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:04:49,512 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:04:49,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 16:04:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:49,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 16:04:49,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:04:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:04:50,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:04:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 16:04:50,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132242251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:04:50,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:04:50,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2024-11-13 16:04:50,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686450328] [2024-11-13 16:04:50,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:04:50,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 16:04:50,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:04:50,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 16:04:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-11-13 16:04:50,671 INFO L87 Difference]: Start difference. First operand 501 states and 646 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 16:04:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:04:51,573 INFO L93 Difference]: Finished difference Result 794 states and 1026 transitions. [2024-11-13 16:04:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 16:04:51,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 59 [2024-11-13 16:04:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:04:51,576 INFO L225 Difference]: With dead ends: 794 [2024-11-13 16:04:51,577 INFO L226 Difference]: Without dead ends: 708 [2024-11-13 16:04:51,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2024-11-13 16:04:51,578 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 68 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 16:04:51,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1072 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 16:04:51,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2024-11-13 16:04:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 540. [2024-11-13 16:04:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 514 states have (on average 1.2704280155642023) internal successors, (653), 521 states have internal predecessors, (653), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-13 16:04:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 685 transitions. [2024-11-13 16:04:51,788 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 685 transitions. Word has length 59 [2024-11-13 16:04:51,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:04:51,788 INFO L471 AbstractCegarLoop]: Abstraction has 540 states and 685 transitions. [2024-11-13 16:04:51,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 16:04:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 685 transitions. [2024-11-13 16:04:51,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-13 16:04:51,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:04:51,790 INFO L215 NwaCegarLoop]: trace histogram [4, 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] [2024-11-13 16:04:51,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-13 16:04:51,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-13 16:04:51,991 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:04:51,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:04:51,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2015532131, now seen corresponding path program 2 times [2024-11-13 16:04:51,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:04:51,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940039177] [2024-11-13 16:04:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:04:51,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:04:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:53,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:04:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:53,542 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:04:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:04:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 16:04:53,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:04:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940039177] [2024-11-13 16:04:53,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940039177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:04:53,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116890207] [2024-11-13 16:04:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:04:53,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:04:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:04:53,547 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:04:53,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-13 16:04:53,888 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:04:53,889 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:04:53,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-13 16:04:53,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:04:54,326 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 [2024-11-13 16:04:54,888 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 [2024-11-13 16:04:54,891 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 [2024-11-13 16:04:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:04:54,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:04:55,454 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:04:55,455 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 [2024-11-13 16:04:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 16:04:55,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116890207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:04:55,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:04:55,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 12] total 39 [2024-11-13 16:04:55,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809612042] [2024-11-13 16:04:55,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:04:55,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 16:04:55,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:04:55,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 16:04:55,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 16:04:55,809 INFO L87 Difference]: Start difference. First operand 540 states and 685 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 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) [2024-11-13 16:04:59,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:04:59,578 INFO L93 Difference]: Finished difference Result 785 states and 1015 transitions. [2024-11-13 16:04:59,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 16:04:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 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 [2024-11-13 16:04:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:04:59,581 INFO L225 Difference]: With dead ends: 785 [2024-11-13 16:04:59,581 INFO L226 Difference]: Without dead ends: 727 [2024-11-13 16:04:59,582 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=349, Invalid=2731, Unknown=0, NotChecked=0, Total=3080 [2024-11-13 16:04:59,582 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 187 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:04:59,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1733 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-13 16:04:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2024-11-13 16:04:59,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 567. [2024-11-13 16:04:59,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 541 states have (on average 1.2735674676524953) internal successors, (689), 548 states have internal predecessors, (689), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-13 16:04:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 721 transitions. [2024-11-13 16:04:59,892 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 721 transitions. Word has length 57 [2024-11-13 16:04:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:04:59,892 INFO L471 AbstractCegarLoop]: Abstraction has 567 states and 721 transitions. [2024-11-13 16:04:59,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 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) [2024-11-13 16:04:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 721 transitions. [2024-11-13 16:04:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 16:04:59,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:04:59,895 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2024-11-13 16:04:59,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-13 16:05:00,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-13 16:05:00,095 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:05:00,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:05:00,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1469082940, now seen corresponding path program 2 times [2024-11-13 16:05:00,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:05:00,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290294730] [2024-11-13 16:05:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:05:00,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:05:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:00,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:05:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:00,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:05:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:00,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-13 16:05:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:00,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-11-13 16:05:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 16:05:00,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:05:00,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290294730] [2024-11-13 16:05:00,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290294730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:05:00,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413366555] [2024-11-13 16:05:00,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:05:00,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:05:00,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:05:00,809 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:05:00,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-13 16:05:01,186 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:05:01,187 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:05:01,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 16:05:01,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:05:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 16:05:01,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:05:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 16:05:02,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413366555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:05:02,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:05:02,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 11] total 33 [2024-11-13 16:05:02,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118525702] [2024-11-13 16:05:02,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:05:02,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 16:05:02,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:05:02,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 16:05:02,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 16:05:02,521 INFO L87 Difference]: Start difference. First operand 567 states and 721 transitions. Second operand has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 16:05:05,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:05:05,174 INFO L93 Difference]: Finished difference Result 1134 states and 1457 transitions. [2024-11-13 16:05:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-13 16:05:05,175 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 60 [2024-11-13 16:05:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:05:05,179 INFO L225 Difference]: With dead ends: 1134 [2024-11-13 16:05:05,179 INFO L226 Difference]: Without dead ends: 1023 [2024-11-13 16:05:05,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=428, Invalid=2224, Unknown=0, NotChecked=0, Total=2652 [2024-11-13 16:05:05,181 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 204 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:05:05,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 1302 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 16:05:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2024-11-13 16:05:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 579. [2024-11-13 16:05:05,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 555 states have (on average 1.2846846846846847) internal successors, (713), 562 states have internal predecessors, (713), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 16:05:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 743 transitions. [2024-11-13 16:05:05,420 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 743 transitions. Word has length 60 [2024-11-13 16:05:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:05:05,420 INFO L471 AbstractCegarLoop]: Abstraction has 579 states and 743 transitions. [2024-11-13 16:05:05,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-13 16:05:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 743 transitions. [2024-11-13 16:05:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-13 16:05:05,422 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:05:05,422 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 16:05:05,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-13 16:05:05,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-13 16:05:05,623 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:05:05,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:05:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash -937810334, now seen corresponding path program 8 times [2024-11-13 16:05:05,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:05:05,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807382895] [2024-11-13 16:05:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:05:05,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:05:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:06,671 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:05:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:06,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:05:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 16:05:06,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:05:06,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807382895] [2024-11-13 16:05:06,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807382895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:05:06,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612048271] [2024-11-13 16:05:06,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:05:06,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:05:06,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:05:06,682 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:05:06,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-13 16:05:06,960 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:05:06,960 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:05:06,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 16:05:06,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:05:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:05:07,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:05:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 16:05:08,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612048271] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:05:08,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:05:08,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 13] total 37 [2024-11-13 16:05:08,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557395241] [2024-11-13 16:05:08,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:05:08,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 16:05:08,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:05:08,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 16:05:08,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 16:05:08,175 INFO L87 Difference]: Start difference. First operand 579 states and 743 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 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) [2024-11-13 16:05:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:05:12,234 INFO L93 Difference]: Finished difference Result 1398 states and 1816 transitions. [2024-11-13 16:05:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-13 16:05:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 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 [2024-11-13 16:05:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:05:12,240 INFO L225 Difference]: With dead ends: 1398 [2024-11-13 16:05:12,240 INFO L226 Difference]: Without dead ends: 1374 [2024-11-13 16:05:12,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=656, Invalid=4174, Unknown=0, NotChecked=0, Total=4830 [2024-11-13 16:05:12,241 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 485 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 2320 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 16:05:12,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 2320 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 16:05:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2024-11-13 16:05:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 636. [2024-11-13 16:05:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 612 states have (on average 1.2973856209150327) internal successors, (794), 619 states have internal predecessors, (794), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 16:05:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 824 transitions. [2024-11-13 16:05:12,588 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 824 transitions. Word has length 58 [2024-11-13 16:05:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:05:12,589 INFO L471 AbstractCegarLoop]: Abstraction has 636 states and 824 transitions. [2024-11-13 16:05:12,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 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) [2024-11-13 16:05:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 824 transitions. [2024-11-13 16:05:12,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 16:05:12,591 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:05:12,592 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 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] [2024-11-13 16:05:12,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-13 16:05:12,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-13 16:05:12,792 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:05:12,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:05:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash 99819644, now seen corresponding path program 2 times [2024-11-13 16:05:12,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:05:12,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936879310] [2024-11-13 16:05:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:05:12,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:05:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:13,133 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:05:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:13,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:05:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 16:05:13,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:05:13,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936879310] [2024-11-13 16:05:13,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936879310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:05:13,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784762282] [2024-11-13 16:05:13,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:05:13,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:05:13,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:05:13,140 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:05:13,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-13 16:05:13,406 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:05:13,407 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:05:13,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 16:05:13,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:05:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:05:13,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:05:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 16:05:14,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784762282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:05:14,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:05:14,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 32 [2024-11-13 16:05:14,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742916027] [2024-11-13 16:05:14,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:05:14,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 16:05:14,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:05:14,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 16:05:14,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2024-11-13 16:05:14,405 INFO L87 Difference]: Start difference. First operand 636 states and 824 transitions. Second operand has 32 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 31 states have internal predecessors, (102), 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) [2024-11-13 16:05:16,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:05:16,254 INFO L93 Difference]: Finished difference Result 1002 states and 1284 transitions. [2024-11-13 16:05:16,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 16:05:16,255 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 31 states have internal predecessors, (102), 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 60 [2024-11-13 16:05:16,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:05:16,257 INFO L225 Difference]: With dead ends: 1002 [2024-11-13 16:05:16,257 INFO L226 Difference]: Without dead ends: 711 [2024-11-13 16:05:16,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=181, Invalid=1799, Unknown=0, NotChecked=0, Total=1980 [2024-11-13 16:05:16,259 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 54 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:05:16,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1720 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 16:05:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2024-11-13 16:05:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 611. [2024-11-13 16:05:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 587 states have (on average 1.3066439522998297) internal successors, (767), 594 states have internal predecessors, (767), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 16:05:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 797 transitions. [2024-11-13 16:05:16,493 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 797 transitions. Word has length 60 [2024-11-13 16:05:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:05:16,493 INFO L471 AbstractCegarLoop]: Abstraction has 611 states and 797 transitions. [2024-11-13 16:05:16,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 31 states have internal predecessors, (102), 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) [2024-11-13 16:05:16,493 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 797 transitions. [2024-11-13 16:05:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 16:05:16,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:05:16,495 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2024-11-13 16:05:16,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-13 16:05:16,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:05:16,695 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:05:16,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:05:16,696 INFO L85 PathProgramCache]: Analyzing trace with hash 140120699, now seen corresponding path program 9 times [2024-11-13 16:05:16,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:05:16,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634125370] [2024-11-13 16:05:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:05:16,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:05:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:18,421 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:05:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:18,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:05:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:05:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:05:18,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:05:18,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634125370] [2024-11-13 16:05:18,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634125370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:05:18,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627486164] [2024-11-13 16:05:18,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:05:18,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:05:18,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:05:18,431 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:05:18,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-13 16:05:19,435 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-13 16:05:19,435 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:05:19,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-13 16:05:19,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:05:19,540 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 [2024-11-13 16:05:19,755 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 [2024-11-13 16:05:19,857 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 [2024-11-13 16:05:22,451 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 [2024-11-13 16:05:22,457 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 [2024-11-13 16:05:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:05:22,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:05:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 16:05:25,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627486164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:05:25,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:05:25,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 19] total 59 [2024-11-13 16:05:25,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260612776] [2024-11-13 16:05:25,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:05:25,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-13 16:05:25,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:05:25,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-13 16:05:25,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2999, Unknown=0, NotChecked=0, Total=3422 [2024-11-13 16:05:25,472 INFO L87 Difference]: Start difference. First operand 611 states and 797 transitions. Second operand has 59 states, 59 states have (on average 2.135593220338983) internal successors, (126), 59 states have internal predecessors, (126), 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) [2024-11-13 16:05:51,064 WARN L286 SmtUtils]: Spent 17.69s on a formula simplification. DAG size of input: 95 DAG size of output: 93 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:05:58,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 16:06:19,499 WARN L286 SmtUtils]: Spent 16.41s on a formula simplification. DAG size of input: 119 DAG size of output: 116 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:06:21,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 16:06:25,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 16:07:28,844 WARN L286 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 138 DAG size of output: 133 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:07:47,615 WARN L286 SmtUtils]: Spent 7.14s on a formula simplification. DAG size of input: 129 DAG size of output: 125 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:08:33,350 WARN L286 SmtUtils]: Spent 16.29s on a formula simplification. DAG size of input: 100 DAG size of output: 98 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:09:27,247 WARN L286 SmtUtils]: Spent 9.79s on a formula simplification. DAG size of input: 151 DAG size of output: 146 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:09:59,818 WARN L286 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 146 DAG size of output: 141 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:10:19,298 WARN L286 SmtUtils]: Spent 7.60s on a formula simplification. DAG size of input: 150 DAG size of output: 143 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:10:23,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 16:10:25,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 16:10:29,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 16:10:30,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 16:10:35,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 16:10:36,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-13 16:10:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:37,943 INFO L93 Difference]: Finished difference Result 2176 states and 2878 transitions. [2024-11-13 16:10:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2024-11-13 16:10:37,944 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.135593220338983) internal successors, (126), 59 states have internal predecessors, (126), 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 [2024-11-13 16:10:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:37,959 INFO L225 Difference]: With dead ends: 2176 [2024-11-13 16:10:37,959 INFO L226 Difference]: Without dead ends: 2130 [2024-11-13 16:10:37,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5494 ImplicationChecksByTransitivity, 281.2s TimeCoverageRelationStatistics Valid=2568, Invalid=16890, Unknown=2, NotChecked=0, Total=19460 [2024-11-13 16:10:37,963 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 431 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 3544 mSolverCounterSat, 63 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3544 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:37,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 1704 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3544 Invalid, 4 Unknown, 0 Unchecked, 34.1s Time] [2024-11-13 16:10:37,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2024-11-13 16:10:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 983. [2024-11-13 16:10:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 959 states have (on average 1.3284671532846715) internal successors, (1274), 966 states have internal predecessors, (1274), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 16:10:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1304 transitions. [2024-11-13 16:10:38,419 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1304 transitions. Word has length 61 [2024-11-13 16:10:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:38,419 INFO L471 AbstractCegarLoop]: Abstraction has 983 states and 1304 transitions. [2024-11-13 16:10:38,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.135593220338983) internal successors, (126), 59 states have internal predecessors, (126), 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) [2024-11-13 16:10:38,420 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1304 transitions. [2024-11-13 16:10:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 16:10:38,422 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:38,422 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2024-11-13 16:10:38,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-13 16:10:38,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-13 16:10:38,626 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:10:38,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:38,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1289349169, now seen corresponding path program 10 times [2024-11-13 16:10:38,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:38,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764236512] [2024-11-13 16:10:38,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:38,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:40,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:10:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:40,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:10:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:10:40,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:40,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764236512] [2024-11-13 16:10:40,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764236512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:40,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849812457] [2024-11-13 16:10:40,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:10:40,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:40,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:40,518 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:40,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-13 16:10:40,883 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:10:40,883 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:10:40,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-13 16:10:40,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:41,440 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 [2024-11-13 16:10:43,550 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 [2024-11-13 16:10:43,554 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 [2024-11-13 16:10:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:10:43,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:10:45,034 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:10:45,035 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 [2024-11-13 16:10:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 16:10:45,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849812457] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:10:45,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:10:45,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 17] total 59 [2024-11-13 16:10:45,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504240857] [2024-11-13 16:10:45,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:10:45,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-13 16:10:45,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:45,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-13 16:10:45,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=3111, Unknown=0, NotChecked=0, Total=3422 [2024-11-13 16:10:45,955 INFO L87 Difference]: Start difference. First operand 983 states and 1304 transitions. Second operand has 59 states, 59 states have (on average 2.23728813559322) internal successors, (132), 58 states have internal predecessors, (132), 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) [2024-11-13 16:10:50,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:50,361 INFO L93 Difference]: Finished difference Result 1325 states and 1759 transitions. [2024-11-13 16:10:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 16:10:50,361 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.23728813559322) internal successors, (132), 58 states have internal predecessors, (132), 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 61 [2024-11-13 16:10:50,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:50,364 INFO L225 Difference]: With dead ends: 1325 [2024-11-13 16:10:50,364 INFO L226 Difference]: Without dead ends: 1129 [2024-11-13 16:10:50,365 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=460, Invalid=4232, Unknown=0, NotChecked=0, Total=4692 [2024-11-13 16:10:50,366 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 180 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:50,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1758 Invalid, 2488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2475 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-13 16:10:50,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2024-11-13 16:10:50,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 972. [2024-11-13 16:10:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 948 states have (on average 1.3248945147679325) internal successors, (1256), 955 states have internal predecessors, (1256), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 16:10:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1286 transitions. [2024-11-13 16:10:50,871 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1286 transitions. Word has length 61 [2024-11-13 16:10:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:50,871 INFO L471 AbstractCegarLoop]: Abstraction has 972 states and 1286 transitions. [2024-11-13 16:10:50,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.23728813559322) internal successors, (132), 58 states have internal predecessors, (132), 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) [2024-11-13 16:10:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1286 transitions. [2024-11-13 16:10:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 16:10:50,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:50,873 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2024-11-13 16:10:50,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-13 16:10:51,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:51,074 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:10:51,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:51,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2003630197, now seen corresponding path program 11 times [2024-11-13 16:10:51,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:51,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820892138] [2024-11-13 16:10:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:51,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:52,934 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:10:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:52,936 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:10:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:10:52,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:52,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820892138] [2024-11-13 16:10:52,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820892138] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:52,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529359190] [2024-11-13 16:10:52,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:10:52,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:52,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:52,941 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:52,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-13 16:10:53,534 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-13 16:10:53,534 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:10:53,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-13 16:10:53,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:53,807 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 [2024-11-13 16:10:53,973 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 [2024-11-13 16:10:54,034 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 23 treesize of output 1 [2024-11-13 16:10:55,580 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 [2024-11-13 16:10:55,583 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 [2024-11-13 16:10:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:10:55,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:10:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 16:10:57,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529359190] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:10:57,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:10:57,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 17] total 61 [2024-11-13 16:10:57,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553312883] [2024-11-13 16:10:57,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:10:57,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-13 16:10:57,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:57,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-13 16:10:57,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=3318, Unknown=0, NotChecked=0, Total=3660 [2024-11-13 16:10:57,870 INFO L87 Difference]: Start difference. First operand 972 states and 1286 transitions. Second operand has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 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) [2024-11-13 16:11:04,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:11:04,280 INFO L93 Difference]: Finished difference Result 1205 states and 1597 transitions. [2024-11-13 16:11:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 16:11:04,280 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 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 61 [2024-11-13 16:11:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:11:04,284 INFO L225 Difference]: With dead ends: 1205 [2024-11-13 16:11:04,284 INFO L226 Difference]: Without dead ends: 1137 [2024-11-13 16:11:04,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=839, Invalid=8091, Unknown=0, NotChecked=0, Total=8930 [2024-11-13 16:11:04,285 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 342 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 2835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:11:04,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 1721 Invalid, 2835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-13 16:11:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2024-11-13 16:11:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 978. [2024-11-13 16:11:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 954 states have (on average 1.3228511530398324) internal successors, (1262), 961 states have internal predecessors, (1262), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 16:11:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1292 transitions. [2024-11-13 16:11:04,722 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1292 transitions. Word has length 61 [2024-11-13 16:11:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:11:04,722 INFO L471 AbstractCegarLoop]: Abstraction has 978 states and 1292 transitions. [2024-11-13 16:11:04,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 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) [2024-11-13 16:11:04,723 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1292 transitions. [2024-11-13 16:11:04,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 16:11:04,725 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:11:04,725 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2024-11-13 16:11:04,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-13 16:11:04,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:04,925 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:11:04,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:04,926 INFO L85 PathProgramCache]: Analyzing trace with hash -101436677, now seen corresponding path program 12 times [2024-11-13 16:11:04,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:04,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967197754] [2024-11-13 16:11:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:04,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:06,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:11:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:06,749 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:11:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:11:06,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:06,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967197754] [2024-11-13 16:11:06,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967197754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:11:06,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628884061] [2024-11-13 16:11:06,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 16:11:06,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:06,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:11:06,754 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:11:06,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-13 16:11:08,065 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-13 16:11:08,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:11:08,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-13 16:11:08,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:11:08,405 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 [2024-11-13 16:11:10,698 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 [2024-11-13 16:11:10,703 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 [2024-11-13 16:11:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:11:10,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:11:12,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:11:12,354 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 [2024-11-13 16:11:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 16:11:13,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628884061] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:11:13,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:11:13,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 18] total 63 [2024-11-13 16:11:13,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574682904] [2024-11-13 16:11:13,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:11:13,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-13 16:11:13,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-13 16:11:13,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3576, Unknown=0, NotChecked=0, Total=3906 [2024-11-13 16:11:13,233 INFO L87 Difference]: Start difference. First operand 978 states and 1292 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 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) [2024-11-13 16:11:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:11:17,333 INFO L93 Difference]: Finished difference Result 1370 states and 1815 transitions. [2024-11-13 16:11:17,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 16:11:17,334 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 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 61 [2024-11-13 16:11:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:11:17,337 INFO L225 Difference]: With dead ends: 1370 [2024-11-13 16:11:17,337 INFO L226 Difference]: Without dead ends: 1187 [2024-11-13 16:11:17,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=474, Invalid=4638, Unknown=0, NotChecked=0, Total=5112 [2024-11-13 16:11:17,339 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 253 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 2276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:11:17,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1498 Invalid, 2276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2221 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-13 16:11:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2024-11-13 16:11:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 996. [2024-11-13 16:11:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 972 states have (on average 1.323045267489712) internal successors, (1286), 979 states have internal predecessors, (1286), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 16:11:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1316 transitions. [2024-11-13 16:11:17,775 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1316 transitions. Word has length 61 [2024-11-13 16:11:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:11:17,775 INFO L471 AbstractCegarLoop]: Abstraction has 996 states and 1316 transitions. [2024-11-13 16:11:17,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 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) [2024-11-13 16:11:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1316 transitions. [2024-11-13 16:11:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 16:11:17,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:11:17,778 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2024-11-13 16:11:17,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-13 16:11:17,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:17,979 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:11:17,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:17,980 INFO L85 PathProgramCache]: Analyzing trace with hash -815717705, now seen corresponding path program 13 times [2024-11-13 16:11:17,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:17,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713770930] [2024-11-13 16:11:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:17,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:20,036 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:11:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:20,039 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:11:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:11:20,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:20,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713770930] [2024-11-13 16:11:20,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713770930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:11:20,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621277212] [2024-11-13 16:11:20,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 16:11:20,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:20,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:11:20,045 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:11:20,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-13 16:11:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:20,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-13 16:11:20,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:11:20,431 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 [2024-11-13 16:11:21,078 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 23 treesize of output 11 [2024-11-13 16:11:21,082 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 [2024-11-13 16:11:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 16:11:21,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:11:21,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:11:21,877 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 [2024-11-13 16:11:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-13 16:11:22,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621277212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:11:22,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:11:22,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 45 [2024-11-13 16:11:22,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945757599] [2024-11-13 16:11:22,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:11:22,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-13 16:11:22,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:22,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-13 16:11:22,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2024-11-13 16:11:22,152 INFO L87 Difference]: Start difference. First operand 996 states and 1316 transitions. Second operand has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 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) [2024-11-13 16:11:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:11:26,902 INFO L93 Difference]: Finished difference Result 1533 states and 2036 transitions. [2024-11-13 16:11:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-13 16:11:26,902 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 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 61 [2024-11-13 16:11:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:11:26,907 INFO L225 Difference]: With dead ends: 1533 [2024-11-13 16:11:26,907 INFO L226 Difference]: Without dead ends: 1273 [2024-11-13 16:11:26,908 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=617, Invalid=4933, Unknown=0, NotChecked=0, Total=5550 [2024-11-13 16:11:26,908 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 287 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:11:26,908 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 1601 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-13 16:11:26,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2024-11-13 16:11:27,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1003. [2024-11-13 16:11:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 979 states have (on average 1.3115423901940755) internal successors, (1284), 986 states have internal predecessors, (1284), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 16:11:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1314 transitions. [2024-11-13 16:11:27,351 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1314 transitions. Word has length 61 [2024-11-13 16:11:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:11:27,351 INFO L471 AbstractCegarLoop]: Abstraction has 1003 states and 1314 transitions. [2024-11-13 16:11:27,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 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) [2024-11-13 16:11:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1314 transitions. [2024-11-13 16:11:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-13 16:11:27,353 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:11:27,353 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2024-11-13 16:11:27,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-13 16:11:27,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-13 16:11:27,553 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:11:27,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:27,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1941220475, now seen corresponding path program 14 times [2024-11-13 16:11:27,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:27,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614244624] [2024-11-13 16:11:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:27,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:29,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:11:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:29,177 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:11:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:11:29,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614244624] [2024-11-13 16:11:29,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614244624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:11:29,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142356046] [2024-11-13 16:11:29,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:11:29,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:29,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:11:29,182 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:11:29,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-13 16:11:29,515 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:11:29,515 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:11:29,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-13 16:11:29,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:11:29,933 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 [2024-11-13 16:11:32,592 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 [2024-11-13 16:11:32,596 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 [2024-11-13 16:11:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:11:32,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:11:34,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:11:34,029 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 [2024-11-13 16:11:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 16:11:34,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142356046] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:11:34,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:11:34,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 17] total 61 [2024-11-13 16:11:34,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700228740] [2024-11-13 16:11:34,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:11:34,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-13 16:11:34,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-13 16:11:34,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=3339, Unknown=0, NotChecked=0, Total=3660 [2024-11-13 16:11:34,967 INFO L87 Difference]: Start difference. First operand 1003 states and 1314 transitions. Second operand has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 60 states have internal predecessors, (133), 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) [2024-11-13 16:11:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:11:39,322 INFO L93 Difference]: Finished difference Result 1228 states and 1616 transitions. [2024-11-13 16:11:39,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-13 16:11:39,323 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 60 states have internal predecessors, (133), 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 61 [2024-11-13 16:11:39,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:11:39,326 INFO L225 Difference]: With dead ends: 1228 [2024-11-13 16:11:39,326 INFO L226 Difference]: Without dead ends: 1157 [2024-11-13 16:11:39,327 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=458, Invalid=4372, Unknown=0, NotChecked=0, Total=4830 [2024-11-13 16:11:39,327 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 152 mSDsluCounter, 1933 mSDsCounter, 0 mSdLazyCounter, 2562 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 2010 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:11:39,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 2010 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2562 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-13 16:11:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2024-11-13 16:11:39,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1009. [2024-11-13 16:11:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 985 states have (on average 1.3096446700507614) internal successors, (1290), 992 states have internal predecessors, (1290), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 16:11:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1320 transitions. [2024-11-13 16:11:39,894 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1320 transitions. Word has length 61 [2024-11-13 16:11:39,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:11:39,894 INFO L471 AbstractCegarLoop]: Abstraction has 1009 states and 1320 transitions. [2024-11-13 16:11:39,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 60 states have internal predecessors, (133), 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) [2024-11-13 16:11:39,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1320 transitions. [2024-11-13 16:11:39,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-13 16:11:39,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:11:39,896 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-11-13 16:11:39,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-13 16:11:40,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:40,101 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:11:40,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:40,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1275411228, now seen corresponding path program 2 times [2024-11-13 16:11:40,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:40,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123845034] [2024-11-13 16:11:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:40,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:40,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:11:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:40,386 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:11:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:40,387 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-13 16:11:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:40,390 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-13 16:11:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:40,394 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-13 16:11:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 16:11:40,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:40,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123845034] [2024-11-13 16:11:40,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123845034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:11:40,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821252543] [2024-11-13 16:11:40,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:11:40,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:40,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:11:40,399 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:11:40,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-13 16:11:40,657 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:11:40,658 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:11:40,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 16:11:40,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:11:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 16:11:40,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:11:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 16:11:41,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821252543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:11:41,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:11:41,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2024-11-13 16:11:41,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100615621] [2024-11-13 16:11:41,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:11:41,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 16:11:41,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:41,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 16:11:41,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-13 16:11:41,195 INFO L87 Difference]: Start difference. First operand 1009 states and 1320 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 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) [2024-11-13 16:11:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:11:42,131 INFO L93 Difference]: Finished difference Result 1104 states and 1438 transitions. [2024-11-13 16:11:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 16:11:42,132 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 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 65 [2024-11-13 16:11:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:11:42,137 INFO L225 Difference]: With dead ends: 1104 [2024-11-13 16:11:42,137 INFO L226 Difference]: Without dead ends: 1000 [2024-11-13 16:11:42,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2024-11-13 16:11:42,139 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 48 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 16:11:42,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 361 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 16:11:42,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2024-11-13 16:11:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 996. [2024-11-13 16:11:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 972 states have (on average 1.3106995884773662) internal successors, (1274), 979 states have internal predecessors, (1274), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 16:11:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1304 transitions. [2024-11-13 16:11:42,578 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1304 transitions. Word has length 65 [2024-11-13 16:11:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:11:42,578 INFO L471 AbstractCegarLoop]: Abstraction has 996 states and 1304 transitions. [2024-11-13 16:11:42,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 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) [2024-11-13 16:11:42,579 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1304 transitions. [2024-11-13 16:11:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-13 16:11:42,580 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:11:42,580 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2024-11-13 16:11:42,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-13 16:11:42,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:42,780 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:11:42,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash 874424275, now seen corresponding path program 3 times [2024-11-13 16:11:42,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:42,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642108957] [2024-11-13 16:11:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:43,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:11:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:43,171 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:11:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-13 16:11:43,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:43,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642108957] [2024-11-13 16:11:43,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642108957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:11:43,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854303810] [2024-11-13 16:11:43,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:11:43,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:43,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:11:43,177 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:11:43,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-13 16:11:43,984 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 16:11:43,985 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:11:43,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 16:11:43,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:11:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-13 16:11:44,436 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:11:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-13 16:11:45,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854303810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:11:45,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:11:45,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2024-11-13 16:11:45,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989895298] [2024-11-13 16:11:45,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:11:45,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 16:11:45,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:45,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 16:11:45,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2024-11-13 16:11:45,102 INFO L87 Difference]: Start difference. First operand 996 states and 1304 transitions. Second operand has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 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) [2024-11-13 16:11:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:11:48,036 INFO L93 Difference]: Finished difference Result 2608 states and 3427 transitions. [2024-11-13 16:11:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-13 16:11:48,036 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 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 62 [2024-11-13 16:11:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:11:48,046 INFO L225 Difference]: With dead ends: 2608 [2024-11-13 16:11:48,046 INFO L226 Difference]: Without dead ends: 2330 [2024-11-13 16:11:48,047 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 16:11:48,048 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 189 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:11:48,049 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 1368 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 16:11:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2024-11-13 16:11:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1329. [2024-11-13 16:11:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 1305 states have (on average 1.3111111111111111) internal successors, (1711), 1312 states have internal predecessors, (1711), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 16:11:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1741 transitions. [2024-11-13 16:11:48,828 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1741 transitions. Word has length 62 [2024-11-13 16:11:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:11:48,829 INFO L471 AbstractCegarLoop]: Abstraction has 1329 states and 1741 transitions. [2024-11-13 16:11:48,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 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) [2024-11-13 16:11:48,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1741 transitions. [2024-11-13 16:11:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 16:11:48,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:11:48,830 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2024-11-13 16:11:48,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-13 16:11:49,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:49,031 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:11:49,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash 399356088, now seen corresponding path program 3 times [2024-11-13 16:11:49,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:49,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705411622] [2024-11-13 16:11:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:49,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:49,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:11:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:49,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:11:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:49,428 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 16:11:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:49,430 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-13 16:11:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:49,434 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-13 16:11:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-13 16:11:49,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:49,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705411622] [2024-11-13 16:11:49,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705411622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:11:49,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302572058] [2024-11-13 16:11:49,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:11:49,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:49,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:11:49,444 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:11:49,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-13 16:11:49,675 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 16:11:49,675 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:11:49,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 16:11:49,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:11:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-11-13 16:11:49,787 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:11:49,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302572058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:11:49,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:11:49,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2024-11-13 16:11:49,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076173874] [2024-11-13 16:11:49,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:11:49,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:11:49,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:11:49,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:11:49,789 INFO L87 Difference]: Start difference. First operand 1329 states and 1741 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 16:11:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:11:50,469 INFO L93 Difference]: Finished difference Result 1381 states and 1808 transitions. [2024-11-13 16:11:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 16:11:50,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2024-11-13 16:11:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:11:50,474 INFO L225 Difference]: With dead ends: 1381 [2024-11-13 16:11:50,474 INFO L226 Difference]: Without dead ends: 1345 [2024-11-13 16:11:50,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-13 16:11:50,476 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:11:50,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 173 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:11:50,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2024-11-13 16:11:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1327. [2024-11-13 16:11:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1305 states have (on average 1.3111111111111111) internal successors, (1711), 1310 states have internal predecessors, (1711), 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) [2024-11-13 16:11:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1737 transitions. [2024-11-13 16:11:51,069 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1737 transitions. Word has length 66 [2024-11-13 16:11:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:11:51,069 INFO L471 AbstractCegarLoop]: Abstraction has 1327 states and 1737 transitions. [2024-11-13 16:11:51,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 16:11:51,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1737 transitions. [2024-11-13 16:11:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-13 16:11:51,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:11:51,072 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2024-11-13 16:11:51,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-11-13 16:11:51,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:51,273 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:11:51,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:11:51,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1517102270, now seen corresponding path program 1 times [2024-11-13 16:11:51,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:11:51,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500610353] [2024-11-13 16:11:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:51,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:11:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:52,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:11:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:52,165 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:11:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:52,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-13 16:11:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:52,169 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-11-13 16:11:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:52,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-11-13 16:11:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-13 16:11:52,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:11:52,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500610353] [2024-11-13 16:11:52,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500610353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:11:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588896328] [2024-11-13 16:11:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:11:52,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:11:52,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:11:52,179 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:11:52,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-13 16:11:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:11:52,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-13 16:11:52,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:11:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 16:11:53,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:11:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 16:11:55,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588896328] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:11:55,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:11:55,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 18] total 50 [2024-11-13 16:11:55,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461005428] [2024-11-13 16:11:55,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:11:55,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-13 16:11:55,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:11:55,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-13 16:11:55,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2024-11-13 16:11:55,060 INFO L87 Difference]: Start difference. First operand 1327 states and 1737 transitions. Second operand has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-13 16:12:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:12:00,597 INFO L93 Difference]: Finished difference Result 1768 states and 2309 transitions. [2024-11-13 16:12:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-13 16:12:00,598 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2024-11-13 16:12:00,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:12:00,603 INFO L225 Difference]: With dead ends: 1768 [2024-11-13 16:12:00,604 INFO L226 Difference]: Without dead ends: 1701 [2024-11-13 16:12:00,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=823, Invalid=5657, Unknown=0, NotChecked=0, Total=6480 [2024-11-13 16:12:00,605 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 981 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:12:00,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 1519 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 16:12:00,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2024-11-13 16:12:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1322. [2024-11-13 16:12:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1300 states have (on average 1.3069230769230769) internal successors, (1699), 1305 states have internal predecessors, (1699), 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) [2024-11-13 16:12:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1725 transitions. [2024-11-13 16:12:01,259 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1725 transitions. Word has length 67 [2024-11-13 16:12:01,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:12:01,260 INFO L471 AbstractCegarLoop]: Abstraction has 1322 states and 1725 transitions. [2024-11-13 16:12:01,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-13 16:12:01,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1725 transitions. [2024-11-13 16:12:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-13 16:12:01,262 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:12:01,263 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2024-11-13 16:12:01,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-13 16:12:01,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-13 16:12:01,463 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:12:01,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:12:01,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1696026387, now seen corresponding path program 15 times [2024-11-13 16:12:01,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:12:01,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081644712] [2024-11-13 16:12:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:12:01,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:12:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:02,302 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:12:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:02,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:12:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-13 16:12:02,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:12:02,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081644712] [2024-11-13 16:12:02,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081644712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:12:02,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015889111] [2024-11-13 16:12:02,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:12:02,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:12:02,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:12:02,311 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:12:02,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-13 16:12:03,023 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-13 16:12:03,023 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:12:03,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 16:12:03,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:12:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-13 16:12:03,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:12:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-13 16:12:04,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015889111] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:12:04,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:12:04,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2024-11-13 16:12:04,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936604217] [2024-11-13 16:12:04,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:12:04,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 16:12:04,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:12:04,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 16:12:04,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 16:12:04,725 INFO L87 Difference]: Start difference. First operand 1322 states and 1725 transitions. Second operand has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 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) [2024-11-13 16:12:10,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:12:10,292 INFO L93 Difference]: Finished difference Result 2086 states and 2726 transitions. [2024-11-13 16:12:10,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-13 16:12:10,292 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 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 64 [2024-11-13 16:12:10,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:12:10,295 INFO L225 Difference]: With dead ends: 2086 [2024-11-13 16:12:10,296 INFO L226 Difference]: Without dead ends: 1405 [2024-11-13 16:12:10,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=355, Invalid=3551, Unknown=0, NotChecked=0, Total=3906 [2024-11-13 16:12:10,298 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 238 mSDsluCounter, 2229 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:12:10,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 2317 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-13 16:12:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2024-11-13 16:12:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1058. [2024-11-13 16:12:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1036 states have (on average 1.2934362934362935) internal successors, (1340), 1041 states have internal predecessors, (1340), 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) [2024-11-13 16:12:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1366 transitions. [2024-11-13 16:12:10,825 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1366 transitions. Word has length 64 [2024-11-13 16:12:10,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:12:10,825 INFO L471 AbstractCegarLoop]: Abstraction has 1058 states and 1366 transitions. [2024-11-13 16:12:10,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 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) [2024-11-13 16:12:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1366 transitions. [2024-11-13 16:12:10,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-13 16:12:10,828 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:12:10,828 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 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] [2024-11-13 16:12:10,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-13 16:12:11,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-13 16:12:11,028 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:12:11,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:12:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2140667213, now seen corresponding path program 4 times [2024-11-13 16:12:11,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:12:11,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522161428] [2024-11-13 16:12:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:12:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:12:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:11,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:12:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:11,963 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:12:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-13 16:12:11,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:12:11,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522161428] [2024-11-13 16:12:11,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522161428] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:12:11,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214763355] [2024-11-13 16:12:11,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:12:11,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:12:11,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:12:11,967 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:12:11,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-13 16:12:12,268 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:12:12,268 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:12:12,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 16:12:12,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:12:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 16:12:12,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:12:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 16:12:13,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214763355] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:12:13,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:12:13,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 31 [2024-11-13 16:12:13,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298462070] [2024-11-13 16:12:13,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:12:13,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 16:12:13,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:12:13,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 16:12:13,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2024-11-13 16:12:13,500 INFO L87 Difference]: Start difference. First operand 1058 states and 1366 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 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) [2024-11-13 16:12:22,101 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 34 DAG size of output: 24 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:12:27,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:12:27,490 INFO L93 Difference]: Finished difference Result 1536 states and 1968 transitions. [2024-11-13 16:12:27,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 16:12:27,491 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 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 64 [2024-11-13 16:12:27,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:12:27,495 INFO L225 Difference]: With dead ends: 1536 [2024-11-13 16:12:27,496 INFO L226 Difference]: Without dead ends: 1527 [2024-11-13 16:12:27,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=178, Invalid=1304, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 16:12:27,497 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 31 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:12:27,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1537 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 16:12:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2024-11-13 16:12:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1048. [2024-11-13 16:12:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1026 states have (on average 1.293372319688109) internal successors, (1327), 1031 states have internal predecessors, (1327), 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) [2024-11-13 16:12:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1353 transitions. [2024-11-13 16:12:28,179 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1353 transitions. Word has length 64 [2024-11-13 16:12:28,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:12:28,179 INFO L471 AbstractCegarLoop]: Abstraction has 1048 states and 1353 transitions. [2024-11-13 16:12:28,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 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) [2024-11-13 16:12:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1353 transitions. [2024-11-13 16:12:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-13 16:12:28,181 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:12:28,181 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 16:12:28,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-13 16:12:28,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-13 16:12:28,381 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:12:28,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:12:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1952874618, now seen corresponding path program 2 times [2024-11-13 16:12:28,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:12:28,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051175498] [2024-11-13 16:12:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:12:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:12:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:29,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:12:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:29,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:12:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:29,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-13 16:12:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:29,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-13 16:12:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:29,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-13 16:12:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 16:12:29,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:12:29,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051175498] [2024-11-13 16:12:29,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051175498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:12:29,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583505245] [2024-11-13 16:12:29,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:12:29,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:12:29,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:12:29,369 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:12:29,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-13 16:12:29,634 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:12:29,634 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:12:29,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-13 16:12:29,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:12:34,294 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 [2024-11-13 16:12:38,469 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 [2024-11-13 16:12:38,643 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 [2024-11-13 16:12:38,646 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 [2024-11-13 16:12:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 13 refuted. 1 times theorem prover too weak. 12 trivial. 3 not checked. [2024-11-13 16:12:38,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:12:39,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:12:39,073 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 [2024-11-13 16:12:39,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:12:39,086 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 [2024-11-13 16:12:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-13 16:12:39,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583505245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:12:39,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:12:39,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 12] total 39 [2024-11-13 16:12:39,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742323317] [2024-11-13 16:12:39,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:12:39,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 16:12:39,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:12:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 16:12:39,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1220, Unknown=2, NotChecked=142, Total=1482 [2024-11-13 16:12:39,369 INFO L87 Difference]: Start difference. First operand 1048 states and 1353 transitions. Second operand has 39 states, 38 states have (on average 2.973684210526316) internal successors, (113), 39 states have internal predecessors, (113), 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) [2024-11-13 16:12:52,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:12:52,095 INFO L93 Difference]: Finished difference Result 1592 states and 2050 transitions. [2024-11-13 16:12:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-13 16:12:52,096 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.973684210526316) internal successors, (113), 39 states have internal predecessors, (113), 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 68 [2024-11-13 16:12:52,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:12:52,099 INFO L225 Difference]: With dead ends: 1592 [2024-11-13 16:12:52,099 INFO L226 Difference]: Without dead ends: 1508 [2024-11-13 16:12:52,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=430, Invalid=3734, Unknown=4, NotChecked=254, Total=4422 [2024-11-13 16:12:52,101 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 272 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 621 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 16:12:52,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1555 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1609 Invalid, 0 Unknown, 621 Unchecked, 1.7s Time] [2024-11-13 16:12:52,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2024-11-13 16:12:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1072. [2024-11-13 16:12:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1046 states have (on average 1.2820267686424474) internal successors, (1341), 1051 states have internal predecessors, (1341), 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) [2024-11-13 16:12:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1371 transitions. [2024-11-13 16:12:52,630 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1371 transitions. Word has length 68 [2024-11-13 16:12:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:12:52,631 INFO L471 AbstractCegarLoop]: Abstraction has 1072 states and 1371 transitions. [2024-11-13 16:12:52,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.973684210526316) internal successors, (113), 39 states have internal predecessors, (113), 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) [2024-11-13 16:12:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1371 transitions. [2024-11-13 16:12:52,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-13 16:12:52,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:12:52,633 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 4, 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] [2024-11-13 16:12:52,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-11-13 16:12:52,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-11-13 16:12:52,834 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:12:52,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:12:52,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1438559497, now seen corresponding path program 1 times [2024-11-13 16:12:52,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:12:52,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404082841] [2024-11-13 16:12:52,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:12:52,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:12:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:53,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:12:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:53,193 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:12:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 16:12:53,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:12:53,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404082841] [2024-11-13 16:12:53,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404082841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:12:53,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261636066] [2024-11-13 16:12:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:12:53,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:12:53,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:12:53,197 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:12:53,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-13 16:12:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:53,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-13 16:12:53,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:12:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 39 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 16:12:54,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:12:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 39 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-13 16:12:54,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261636066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:12:54,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:12:54,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 38 [2024-11-13 16:12:54,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339348435] [2024-11-13 16:12:54,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:12:54,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-13 16:12:54,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:12:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-13 16:12:54,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 16:12:54,853 INFO L87 Difference]: Start difference. First operand 1072 states and 1371 transitions. Second operand has 38 states, 37 states have (on average 2.972972972972973) internal successors, (110), 37 states have internal predecessors, (110), 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) [2024-11-13 16:12:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:12:58,013 INFO L93 Difference]: Finished difference Result 1482 states and 1880 transitions. [2024-11-13 16:12:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-13 16:12:58,014 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.972972972972973) internal successors, (110), 37 states have internal predecessors, (110), 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 [2024-11-13 16:12:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:12:58,017 INFO L225 Difference]: With dead ends: 1482 [2024-11-13 16:12:58,017 INFO L226 Difference]: Without dead ends: 993 [2024-11-13 16:12:58,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=281, Invalid=3141, Unknown=0, NotChecked=0, Total=3422 [2024-11-13 16:12:58,018 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 84 mSDsluCounter, 2077 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-13 16:12:58,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 2156 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-13 16:12:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2024-11-13 16:12:58,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 842. [2024-11-13 16:12:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 816 states have (on average 1.2732843137254901) internal successors, (1039), 821 states have internal predecessors, (1039), 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) [2024-11-13 16:12:58,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1069 transitions. [2024-11-13 16:12:58,418 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1069 transitions. Word has length 65 [2024-11-13 16:12:58,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:12:58,418 INFO L471 AbstractCegarLoop]: Abstraction has 842 states and 1069 transitions. [2024-11-13 16:12:58,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.972972972972973) internal successors, (110), 37 states have internal predecessors, (110), 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) [2024-11-13 16:12:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1069 transitions. [2024-11-13 16:12:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-13 16:12:58,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:12:58,420 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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] [2024-11-13 16:12:58,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-13 16:12:58,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:12:58,622 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:12:58,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:12:58,623 INFO L85 PathProgramCache]: Analyzing trace with hash -548443290, now seen corresponding path program 5 times [2024-11-13 16:12:58,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:12:58,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602974126] [2024-11-13 16:12:58,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:12:58,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:12:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:59,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:12:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:59,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:12:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:12:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-13 16:12:59,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:12:59,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602974126] [2024-11-13 16:12:59,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602974126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:12:59,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144798269] [2024-11-13 16:12:59,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:12:59,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:12:59,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:12:59,996 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:12:59,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-13 16:13:01,829 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-13 16:13:01,829 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:13:01,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-13 16:13:01,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:13:02,047 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 [2024-11-13 16:13:02,097 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 23 treesize of output 1 [2024-11-13 16:13:02,287 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 [2024-11-13 16:13:03,579 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 [2024-11-13 16:13:03,589 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 [2024-11-13 16:13:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:13:03,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:13:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-13 16:13:05,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144798269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:13:05,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:13:05,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 16] total 55 [2024-11-13 16:13:05,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107508075] [2024-11-13 16:13:05,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:13:05,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-13 16:13:05,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:13:05,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-13 16:13:05,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2683, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 16:13:05,660 INFO L87 Difference]: Start difference. First operand 842 states and 1069 transitions. Second operand has 55 states, 55 states have (on average 2.5454545454545454) internal successors, (140), 55 states have internal predecessors, (140), 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) [2024-11-13 16:13:13,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:13:13,827 INFO L93 Difference]: Finished difference Result 1390 states and 1790 transitions. [2024-11-13 16:13:13,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-13 16:13:13,828 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.5454545454545454) internal successors, (140), 55 states have internal predecessors, (140), 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 65 [2024-11-13 16:13:13,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:13:13,831 INFO L225 Difference]: With dead ends: 1390 [2024-11-13 16:13:13,831 INFO L226 Difference]: Without dead ends: 1274 [2024-11-13 16:13:13,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2913 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1119, Invalid=10653, Unknown=0, NotChecked=0, Total=11772 [2024-11-13 16:13:13,832 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 503 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 2917 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:13:13,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1824 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2917 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-13 16:13:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2024-11-13 16:13:14,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 870. [2024-11-13 16:13:14,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 844 states have (on average 1.2748815165876777) internal successors, (1076), 849 states have internal predecessors, (1076), 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) [2024-11-13 16:13:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1106 transitions. [2024-11-13 16:13:14,226 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1106 transitions. Word has length 65 [2024-11-13 16:13:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:13:14,226 INFO L471 AbstractCegarLoop]: Abstraction has 870 states and 1106 transitions. [2024-11-13 16:13:14,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.5454545454545454) internal successors, (140), 55 states have internal predecessors, (140), 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) [2024-11-13 16:13:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1106 transitions. [2024-11-13 16:13:14,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 16:13:14,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:13:14,228 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 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] [2024-11-13 16:13:14,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-13 16:13:14,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:13:14,429 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:13:14,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:13:14,429 INFO L85 PathProgramCache]: Analyzing trace with hash 871139019, now seen corresponding path program 16 times [2024-11-13 16:13:14,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:13:14,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343053153] [2024-11-13 16:13:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:13:14,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:13:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:15,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:13:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:15,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:13:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-13 16:13:15,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:13:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343053153] [2024-11-13 16:13:15,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343053153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:13:15,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619309201] [2024-11-13 16:13:15,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:13:15,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:13:15,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:13:15,366 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:13:15,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-13 16:13:15,654 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:13:15,654 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:13:15,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-13 16:13:15,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:13:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:13:16,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:13:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-13 16:13:18,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619309201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:13:18,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:13:18,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 19] total 46 [2024-11-13 16:13:18,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180986747] [2024-11-13 16:13:18,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:13:18,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-13 16:13:18,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:13:18,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-13 16:13:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1891, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 16:13:18,159 INFO L87 Difference]: Start difference. First operand 870 states and 1106 transitions. Second operand has 46 states, 46 states have (on average 2.5217391304347827) internal successors, (116), 46 states have internal predecessors, (116), 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) [2024-11-13 16:13:27,461 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 35 DAG size of output: 25 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:13:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:13:35,069 INFO L93 Difference]: Finished difference Result 2291 states and 2930 transitions. [2024-11-13 16:13:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-13 16:13:35,069 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.5217391304347827) internal successors, (116), 46 states have internal predecessors, (116), 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 66 [2024-11-13 16:13:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:13:35,076 INFO L225 Difference]: With dead ends: 2291 [2024-11-13 16:13:35,076 INFO L226 Difference]: Without dead ends: 2271 [2024-11-13 16:13:35,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=366, Invalid=3924, Unknown=0, NotChecked=0, Total=4290 [2024-11-13 16:13:35,078 INFO L432 NwaCegarLoop]: 129 mSDtfsCounter, 190 mSDsluCounter, 2948 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 3077 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 16:13:35,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 3077 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 16:13:35,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2024-11-13 16:13:35,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 891. [2024-11-13 16:13:35,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 865 states have (on average 1.276300578034682) internal successors, (1104), 870 states have internal predecessors, (1104), 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) [2024-11-13 16:13:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1134 transitions. [2024-11-13 16:13:35,523 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1134 transitions. Word has length 66 [2024-11-13 16:13:35,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:13:35,524 INFO L471 AbstractCegarLoop]: Abstraction has 891 states and 1134 transitions. [2024-11-13 16:13:35,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.5217391304347827) internal successors, (116), 46 states have internal predecessors, (116), 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) [2024-11-13 16:13:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1134 transitions. [2024-11-13 16:13:35,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 16:13:35,526 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:13:35,527 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:13:35,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-13 16:13:35,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:13:35,727 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:13:35,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:13:35,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1425229316, now seen corresponding path program 1 times [2024-11-13 16:13:35,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:13:35,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867559965] [2024-11-13 16:13:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:13:35,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:13:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:36,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:13:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:36,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:13:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:36,502 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-13 16:13:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:36,505 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-13 16:13:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:36,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-11-13 16:13:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 16:13:36,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:13:36,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867559965] [2024-11-13 16:13:36,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867559965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:13:36,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407049739] [2024-11-13 16:13:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:13:36,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:13:36,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:13:36,535 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:13:36,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-13 16:13:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:36,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-13 16:13:36,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:13:37,217 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 [2024-11-13 16:13:37,219 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 [2024-11-13 16:13:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-13 16:13:37,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:13:37,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:13:37,426 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 [2024-11-13 16:13:37,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:13:37,439 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 [2024-11-13 16:13:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-13 16:13:37,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407049739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:13:37,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:13:37,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 24 [2024-11-13 16:13:37,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317799668] [2024-11-13 16:13:37,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:13:37,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 16:13:37,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:13:37,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 16:13:37,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-11-13 16:13:37,555 INFO L87 Difference]: Start difference. First operand 891 states and 1134 transitions. Second operand has 24 states, 22 states have (on average 3.909090909090909) internal successors, (86), 24 states have internal predecessors, (86), 6 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-13 16:13:38,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:13:40,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:13:41,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:13:41,077 INFO L93 Difference]: Finished difference Result 986 states and 1253 transitions. [2024-11-13 16:13:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 16:13:41,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.909090909090909) internal successors, (86), 24 states have internal predecessors, (86), 6 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) Word has length 72 [2024-11-13 16:13:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:13:41,081 INFO L225 Difference]: With dead ends: 986 [2024-11-13 16:13:41,082 INFO L226 Difference]: Without dead ends: 961 [2024-11-13 16:13:41,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-11-13 16:13:41,083 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 142 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-13 16:13:41,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 655 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 395 Invalid, 2 Unknown, 0 Unchecked, 2.9s Time] [2024-11-13 16:13:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2024-11-13 16:13:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 958. [2024-11-13 16:13:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 931 states have (on average 1.2771213748657357) internal successors, (1189), 936 states have internal predecessors, (1189), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-13 16:13:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1220 transitions. [2024-11-13 16:13:41,626 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1220 transitions. Word has length 72 [2024-11-13 16:13:41,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:13:41,626 INFO L471 AbstractCegarLoop]: Abstraction has 958 states and 1220 transitions. [2024-11-13 16:13:41,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.909090909090909) internal successors, (86), 24 states have internal predecessors, (86), 6 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-13 16:13:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1220 transitions. [2024-11-13 16:13:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-13 16:13:41,628 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:13:41,628 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:13:41,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-13 16:13:41,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-11-13 16:13:41,829 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:13:41,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:13:41,829 INFO L85 PathProgramCache]: Analyzing trace with hash 123570480, now seen corresponding path program 2 times [2024-11-13 16:13:41,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:13:41,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809154268] [2024-11-13 16:13:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:13:41,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:13:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:43,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:13:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:43,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:13:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:43,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-13 16:13:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:43,055 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-11-13 16:13:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:43,060 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-11-13 16:13:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 16:13:43,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:13:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809154268] [2024-11-13 16:13:43,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809154268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:13:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697330984] [2024-11-13 16:13:43,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:13:43,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:13:43,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:13:43,066 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:13:43,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-13 16:13:43,372 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:13:43,372 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:13:43,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-13 16:13:43,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:13:43,405 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 [2024-11-13 16:13:43,495 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 [2024-11-13 16:13:43,545 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 [2024-11-13 16:13:44,599 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 [2024-11-13 16:13:44,601 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 [2024-11-13 16:13:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:13:44,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:13:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-13 16:13:45,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697330984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:13:45,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:13:45,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 15] total 39 [2024-11-13 16:13:45,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525905509] [2024-11-13 16:13:45,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:13:45,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 16:13:45,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:13:45,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 16:13:45,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 16:13:45,520 INFO L87 Difference]: Start difference. First operand 958 states and 1220 transitions. Second operand has 39 states, 38 states have (on average 3.0) internal successors, (114), 37 states have internal predecessors, (114), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-13 16:13:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:13:48,077 INFO L93 Difference]: Finished difference Result 1349 states and 1728 transitions. [2024-11-13 16:13:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 16:13:48,078 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.0) internal successors, (114), 37 states have internal predecessors, (114), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 72 [2024-11-13 16:13:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:13:48,083 INFO L225 Difference]: With dead ends: 1349 [2024-11-13 16:13:48,083 INFO L226 Difference]: Without dead ends: 1172 [2024-11-13 16:13:48,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2024-11-13 16:13:48,085 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 104 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:13:48,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1824 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 16:13:48,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2024-11-13 16:13:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1143. [2024-11-13 16:13:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1104 states have (on average 1.2789855072463767) internal successors, (1412), 1112 states have internal predecessors, (1412), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 16:13:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1458 transitions. [2024-11-13 16:13:48,764 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1458 transitions. Word has length 72 [2024-11-13 16:13:48,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:13:48,765 INFO L471 AbstractCegarLoop]: Abstraction has 1143 states and 1458 transitions. [2024-11-13 16:13:48,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.0) internal successors, (114), 37 states have internal predecessors, (114), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-13 16:13:48,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1458 transitions. [2024-11-13 16:13:48,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 16:13:48,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:13:48,767 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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] [2024-11-13 16:13:48,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-13 16:13:48,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-11-13 16:13:48,967 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:13:48,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:13:48,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1595633010, now seen corresponding path program 17 times [2024-11-13 16:13:48,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:13:48,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811247591] [2024-11-13 16:13:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:13:48,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:13:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:50,705 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:13:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:50,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:13:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:13:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 16:13:50,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:13:50,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811247591] [2024-11-13 16:13:50,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811247591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:13:50,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882510441] [2024-11-13 16:13:50,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:13:50,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:13:50,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:13:50,711 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:13:50,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-13 16:13:51,979 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-13 16:13:51,979 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:13:51,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-13 16:13:51,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:13:52,504 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 [2024-11-13 16:13:55,370 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 [2024-11-13 16:13:55,377 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 [2024-11-13 16:13:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 80 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:13:55,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:13:57,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:13:57,396 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 [2024-11-13 16:13:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 16:13:58,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882510441] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:13:58,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:13:58,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 32, 19] total 71 [2024-11-13 16:13:58,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727296092] [2024-11-13 16:13:58,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:13:58,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-13 16:13:58,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:13:58,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-13 16:13:58,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=4645, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 16:13:58,810 INFO L87 Difference]: Start difference. First operand 1143 states and 1458 transitions. Second operand has 71 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:14:43,361 WARN L286 SmtUtils]: Spent 29.40s on a formula simplification. DAG size of input: 196 DAG size of output: 131 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:15:26,061 WARN L286 SmtUtils]: Spent 35.20s on a formula simplification. DAG size of input: 217 DAG size of output: 150 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-13 16:15:29,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:15:29,346 INFO L93 Difference]: Finished difference Result 1807 states and 2339 transitions. [2024-11-13 16:15:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-13 16:15:29,347 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2024-11-13 16:15:29,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:15:29,352 INFO L225 Difference]: With dead ends: 1807 [2024-11-13 16:15:29,352 INFO L226 Difference]: Without dead ends: 1680 [2024-11-13 16:15:29,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3281 ImplicationChecksByTransitivity, 83.7s TimeCoverageRelationStatistics Valid=1127, Invalid=12679, Unknown=0, NotChecked=0, Total=13806 [2024-11-13 16:15:29,355 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 493 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 4073 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 4150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 4073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:15:29,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 2288 Invalid, 4150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4073 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2024-11-13 16:15:29,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2024-11-13 16:15:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1488. [2024-11-13 16:15:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1449 states have (on average 1.2767425810904072) internal successors, (1850), 1457 states have internal predecessors, (1850), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 16:15:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 1896 transitions. [2024-11-13 16:15:30,496 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 1896 transitions. Word has length 69 [2024-11-13 16:15:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:15:30,496 INFO L471 AbstractCegarLoop]: Abstraction has 1488 states and 1896 transitions. [2024-11-13 16:15:30,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:15:30,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 1896 transitions. [2024-11-13 16:15:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 16:15:30,498 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:15:30,498 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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] [2024-11-13 16:15:30,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-13 16:15:30,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-13 16:15:30,699 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:15:30,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:15:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1684331578, now seen corresponding path program 18 times [2024-11-13 16:15:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:15:30,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494410172] [2024-11-13 16:15:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:15:30,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:15:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:32,693 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:15:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:32,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:15:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 16:15:32,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:15:32,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494410172] [2024-11-13 16:15:32,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494410172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:15:32,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088550271] [2024-11-13 16:15:32,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 16:15:32,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:15:32,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:15:32,699 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:15:32,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-13 16:15:34,028 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-13 16:15:34,029 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:15:34,032 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-13 16:15:34,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:15:35,377 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 [2024-11-13 16:15:35,382 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 [2024-11-13 16:15:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-11-13 16:15:35,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:15:36,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:15:36,156 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 [2024-11-13 16:15:36,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:15:36,172 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 [2024-11-13 16:15:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-13 16:15:36,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088550271] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:15:36,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:15:36,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 9] total 43 [2024-11-13 16:15:36,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890651897] [2024-11-13 16:15:36,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:15:36,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 16:15:36,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:15:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 16:15:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 16:15:36,459 INFO L87 Difference]: Start difference. First operand 1488 states and 1896 transitions. Second operand has 43 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 42 states have internal predecessors, (111), 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) [2024-11-13 16:15:41,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:15:41,397 INFO L93 Difference]: Finished difference Result 1925 states and 2469 transitions. [2024-11-13 16:15:41,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-13 16:15:41,398 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 42 states have internal predecessors, (111), 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 69 [2024-11-13 16:15:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:15:41,401 INFO L225 Difference]: With dead ends: 1925 [2024-11-13 16:15:41,401 INFO L226 Difference]: Without dead ends: 1564 [2024-11-13 16:15:41,402 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=448, Invalid=3842, Unknown=0, NotChecked=0, Total=4290 [2024-11-13 16:15:41,402 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 218 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:15:41,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1285 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2173 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 16:15:41,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2024-11-13 16:15:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1445. [2024-11-13 16:15:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1406 states have (on average 1.2624466571834994) internal successors, (1775), 1414 states have internal predecessors, (1775), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 16:15:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 1821 transitions. [2024-11-13 16:15:42,237 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 1821 transitions. Word has length 69 [2024-11-13 16:15:42,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:15:42,237 INFO L471 AbstractCegarLoop]: Abstraction has 1445 states and 1821 transitions. [2024-11-13 16:15:42,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 42 states have internal predecessors, (111), 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) [2024-11-13 16:15:42,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 1821 transitions. [2024-11-13 16:15:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 16:15:42,239 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:15:42,239 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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] [2024-11-13 16:15:42,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-13 16:15:42,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-13 16:15:42,439 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:15:42,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:15:42,440 INFO L85 PathProgramCache]: Analyzing trace with hash 732514954, now seen corresponding path program 19 times [2024-11-13 16:15:42,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:15:42,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012289472] [2024-11-13 16:15:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:15:42,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:15:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:44,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:15:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:44,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:15:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 16:15:44,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:15:44,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012289472] [2024-11-13 16:15:44,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012289472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:15:44,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095506504] [2024-11-13 16:15:44,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 16:15:44,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:15:44,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:15:44,191 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:15:44,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-13 16:15:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:44,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-13 16:15:44,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:15:44,837 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 [2024-11-13 16:15:46,233 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 [2024-11-13 16:15:46,237 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 [2024-11-13 16:15:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 80 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:15:46,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:15:47,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:15:47,415 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 [2024-11-13 16:15:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 16:15:48,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095506504] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:15:48,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:15:48,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 18] total 65 [2024-11-13 16:15:48,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469987862] [2024-11-13 16:15:48,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:15:48,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-13 16:15:48,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:15:48,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-13 16:15:48,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=3852, Unknown=0, NotChecked=0, Total=4160 [2024-11-13 16:15:48,147 INFO L87 Difference]: Start difference. First operand 1445 states and 1821 transitions. Second operand has 65 states, 65 states have (on average 2.230769230769231) internal successors, (145), 65 states have internal predecessors, (145), 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) [2024-11-13 16:15:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:15:51,981 INFO L93 Difference]: Finished difference Result 1618 states and 2047 transitions. [2024-11-13 16:15:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 16:15:51,982 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.230769230769231) internal successors, (145), 65 states have internal predecessors, (145), 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 [2024-11-13 16:15:51,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:15:51,988 INFO L225 Difference]: With dead ends: 1618 [2024-11-13 16:15:51,988 INFO L226 Difference]: Without dead ends: 1551 [2024-11-13 16:15:51,989 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=421, Invalid=5279, Unknown=0, NotChecked=0, Total=5700 [2024-11-13 16:15:51,990 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 95 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 2130 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 16:15:51,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 2130 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 16:15:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2024-11-13 16:15:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1475. [2024-11-13 16:15:53,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1436 states have (on average 1.261142061281337) internal successors, (1811), 1444 states have internal predecessors, (1811), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 16:15:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 1857 transitions. [2024-11-13 16:15:53,184 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 1857 transitions. Word has length 69 [2024-11-13 16:15:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:15:53,184 INFO L471 AbstractCegarLoop]: Abstraction has 1475 states and 1857 transitions. [2024-11-13 16:15:53,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.230769230769231) internal successors, (145), 65 states have internal predecessors, (145), 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) [2024-11-13 16:15:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 1857 transitions. [2024-11-13 16:15:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 16:15:53,186 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:15:53,186 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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] [2024-11-13 16:15:53,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-13 16:15:53,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-13 16:15:53,387 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:15:53,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:15:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash -717863822, now seen corresponding path program 20 times [2024-11-13 16:15:53,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:15:53,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208193458] [2024-11-13 16:15:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:15:53,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:15:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:54,989 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:15:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:54,991 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:15:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:15:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 16:15:54,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:15:54,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208193458] [2024-11-13 16:15:54,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208193458] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:15:54,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669053661] [2024-11-13 16:15:54,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:15:54,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:15:54,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:15:54,994 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:15:54,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-13 16:15:55,448 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:15:55,448 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:15:55,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-13 16:15:55,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:15:55,828 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 [2024-11-13 16:15:56,296 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 [2024-11-13 16:15:56,411 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 [2024-11-13 16:15:59,227 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 [2024-11-13 16:15:59,231 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 [2024-11-13 16:15:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:15:59,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:16:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 16:16:02,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669053661] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:16:02,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:16:02,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 32, 19] total 72 [2024-11-13 16:16:02,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469226363] [2024-11-13 16:16:02,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:16:02,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-13 16:16:02,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:16:02,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-13 16:16:02,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=4644, Unknown=0, NotChecked=0, Total=5112 [2024-11-13 16:16:02,374 INFO L87 Difference]: Start difference. First operand 1475 states and 1857 transitions. Second operand has 72 states, 72 states have (on average 2.138888888888889) internal successors, (154), 71 states have internal predecessors, (154), 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) [2024-11-13 16:16:08,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:16:08,197 INFO L93 Difference]: Finished difference Result 1756 states and 2222 transitions. [2024-11-13 16:16:08,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-13 16:16:08,197 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.138888888888889) internal successors, (154), 71 states have internal predecessors, (154), 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 69 [2024-11-13 16:16:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:16:08,201 INFO L225 Difference]: With dead ends: 1756 [2024-11-13 16:16:08,201 INFO L226 Difference]: Without dead ends: 1689 [2024-11-13 16:16:08,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=654, Invalid=6152, Unknown=0, NotChecked=0, Total=6806 [2024-11-13 16:16:08,203 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 233 mSDsluCounter, 2273 mSDsCounter, 0 mSdLazyCounter, 3314 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 3330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-13 16:16:08,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 2356 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3314 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-13 16:16:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2024-11-13 16:16:09,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1511. [2024-11-13 16:16:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1472 states have (on average 1.2588315217391304) internal successors, (1853), 1480 states have internal predecessors, (1853), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-13 16:16:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1899 transitions. [2024-11-13 16:16:09,030 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1899 transitions. Word has length 69 [2024-11-13 16:16:09,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:16:09,031 INFO L471 AbstractCegarLoop]: Abstraction has 1511 states and 1899 transitions. [2024-11-13 16:16:09,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.138888888888889) internal successors, (154), 71 states have internal predecessors, (154), 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) [2024-11-13 16:16:09,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1899 transitions. [2024-11-13 16:16:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 16:16:09,033 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:16:09,034 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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] [2024-11-13 16:16:09,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-11-13 16:16:09,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:16:09,234 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:16:09,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:16:09,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2147333690, now seen corresponding path program 21 times [2024-11-13 16:16:09,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:16:09,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737172034] [2024-11-13 16:16:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:16:09,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:16:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:11,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 16:16:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:11,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 16:16:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:16:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 68 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 16:16:11,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:16:11,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737172034] [2024-11-13 16:16:11,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737172034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:16:11,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146059984] [2024-11-13 16:16:11,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:16:11,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:16:11,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:16:11,064 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:16:11,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c04c947f-e02b-495c-b708-5dceadf666f2/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process