./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c --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_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/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_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/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_93236f00-181b-4392-9c9e-59ecfdf65e5c/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 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:38:03,284 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:38:03,358 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 15:38:03,368 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:38:03,368 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:38:03,393 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:38:03,394 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:38:03,394 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:38:03,395 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:38:03,395 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:38:03,395 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:38:03,395 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:38:03,396 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:38:03,396 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:38:03,396 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:38:03,396 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:38:03,396 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 15:38:03,397 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:38:03,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 15:38:03,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:38:03,397 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:38:03,397 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 15:38:03,397 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:38:03,398 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 15:38:03,398 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:38:03,398 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:38:03,398 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 15:38:03,398 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:38:03,398 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:38:03,399 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:38:03,399 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:38:03,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:38:03,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:38:03,399 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:38:03,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:38:03,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 15:38:03,400 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 15:38:03,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 15:38:03,400 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:38:03,400 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:38:03,400 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:38:03,401 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:38:03,401 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_93236f00-181b-4392-9c9e-59ecfdf65e5c/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 -> 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c [2024-11-13 15:38:03,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:38:03,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:38:03,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:38:03,784 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:38:03,784 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:38:03,787 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c Unable to find full path for "g++" [2024-11-13 15:38:05,864 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:38:06,218 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:38:06,219 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2024-11-13 15:38:06,230 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/data/4ac2bee44/4df9a3e5b81144de9260b6139bfdba7c/FLAG1397d0ef5 [2024-11-13 15:38:06,246 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/data/4ac2bee44/4df9a3e5b81144de9260b6139bfdba7c [2024-11-13 15:38:06,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:38:06,254 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:38:06,256 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:38:06,257 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:38:06,262 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:38:06,263 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43daa4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06, skipping insertion in model container [2024-11-13 15:38:06,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,306 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:38:06,503 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_93236f00-181b-4392-9c9e-59ecfdf65e5c/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2024-11-13 15:38:06,509 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_93236f00-181b-4392-9c9e-59ecfdf65e5c/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2024-11-13 15:38:06,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:38:06,567 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:38:06,582 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_93236f00-181b-4392-9c9e-59ecfdf65e5c/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2024-11-13 15:38:06,588 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_93236f00-181b-4392-9c9e-59ecfdf65e5c/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2024-11-13 15:38:06,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:38:06,642 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:38:06,642 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06 WrapperNode [2024-11-13 15:38:06,643 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:38:06,644 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:38:06,644 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:38:06,644 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:38:06,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,659 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,690 INFO L138 Inliner]: procedures = 27, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2024-11-13 15:38:06,690 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:38:06,691 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:38:06,692 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:38:06,692 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:38:06,702 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,706 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,724 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-13 15:38:06,724 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,725 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,741 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,751 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,756 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,762 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:38:06,763 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:38:06,763 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:38:06,763 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:38:06,766 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (1/1) ... [2024-11-13 15:38:06,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:38:06,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:38:06,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:38:06,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:38:06,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:38:06,850 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-13 15:38:06,851 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-13 15:38:06,851 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-13 15:38:06,851 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-13 15:38:06,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 15:38:06,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:38:06,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:38:06,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 15:38:06,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 15:38:06,964 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:38:06,966 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:38:07,411 INFO L? ?]: Removed 60 outVars from TransFormulas that were not future-live. [2024-11-13 15:38:07,412 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:38:07,429 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:38:07,429 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 15:38:07,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:38:07 BoogieIcfgContainer [2024-11-13 15:38:07,430 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:38:07,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:38:07,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:38:07,445 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:38:07,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:38:06" (1/3) ... [2024-11-13 15:38:07,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2d9b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:38:07, skipping insertion in model container [2024-11-13 15:38:07,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:06" (2/3) ... [2024-11-13 15:38:07,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2d9b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:38:07, skipping insertion in model container [2024-11-13 15:38:07,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:38:07" (3/3) ... [2024-11-13 15:38:07,450 INFO L112 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_4-2a.c.cil.c [2024-11-13 15:38:07,470 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:38:07,472 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG square_7+soft_float_4-2a.c.cil.c that has 4 procedures, 87 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-13 15:38:07,536 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:38:07,556 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;@4ef7e47b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:38:07,558 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-13 15:38:07,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 73 states have (on average 1.5068493150684932) internal successors, (110), 75 states have internal predecessors, (110), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 15:38:07,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 15:38:07,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:38:07,571 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:38:07,572 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:38:07,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:38:07,578 INFO L85 PathProgramCache]: Analyzing trace with hash -929888677, now seen corresponding path program 1 times [2024-11-13 15:38:07,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:38:07,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109158830] [2024-11-13 15:38:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:38:07,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:38:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 15:38:07,698 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 15:38:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 15:38:07,738 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 15:38:07,740 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 15:38:07,741 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-13 15:38:07,746 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-13 15:38:07,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 15:38:07,755 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-13 15:38:07,771 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-13 15:38:07,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 03:38:07 BoogieIcfgContainer [2024-11-13 15:38:07,775 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-13 15:38:07,777 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 15:38:07,777 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 15:38:07,778 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 15:38:07,781 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:38:07" (3/4) ... [2024-11-13 15:38:07,785 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 15:38:07,786 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 15:38:07,788 INFO L158 Benchmark]: Toolchain (without parser) took 1534.88ms. Allocated memory is still 117.4MB. Free memory was 94.1MB in the beginning and 43.1MB in the end (delta: 51.1MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2024-11-13 15:38:07,788 INFO L158 Benchmark]: CDTParser took 1.24ms. Allocated memory is still 167.8MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 15:38:07,788 INFO L158 Benchmark]: CACSL2BoogieTranslator took 387.43ms. Allocated memory is still 117.4MB. Free memory was 94.1MB in the beginning and 80.0MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 15:38:07,789 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.98ms. Allocated memory is still 117.4MB. Free memory was 80.0MB in the beginning and 78.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 15:38:07,789 INFO L158 Benchmark]: Boogie Preprocessor took 71.05ms. Allocated memory is still 117.4MB. Free memory was 78.5MB in the beginning and 76.6MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 15:38:07,790 INFO L158 Benchmark]: RCFGBuilder took 666.67ms. Allocated memory is still 117.4MB. Free memory was 76.6MB in the beginning and 56.3MB in the end (delta: 20.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 15:38:07,790 INFO L158 Benchmark]: TraceAbstraction took 338.87ms. Allocated memory is still 117.4MB. Free memory was 56.0MB in the beginning and 43.4MB in the end (delta: 12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 15:38:07,790 INFO L158 Benchmark]: Witness Printer took 8.75ms. Allocated memory is still 117.4MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 15:38:07,794 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.24ms. Allocated memory is still 167.8MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 387.43ms. Allocated memory is still 117.4MB. Free memory was 94.1MB in the beginning and 80.0MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.98ms. Allocated memory is still 117.4MB. Free memory was 80.0MB in the beginning and 78.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 71.05ms. Allocated memory is still 117.4MB. Free memory was 78.5MB in the beginning and 76.6MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 666.67ms. Allocated memory is still 117.4MB. Free memory was 76.6MB in the beginning and 56.3MB in the end (delta: 20.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 338.87ms. Allocated memory is still 117.4MB. Free memory was 56.0MB in the beginning and 43.4MB in the end (delta: 12.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Witness Printer took 8.75ms. Allocated memory is still 117.4MB. Free memory is still 43.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 40, overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L310] COND TRUE __VERIFIER_nondet_int() [L311] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L47] COND TRUE !(result >= 0.0f && result < 1.4f) [L48] reach_error() - UnprovableResult [Line: 61]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 87 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-13 15:38:07,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/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_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/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 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:38:10,796 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:38:10,974 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-13 15:38:10,989 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:38:10,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:38:11,055 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:38:11,056 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:38:11,056 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:38:11,057 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:38:11,057 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:38:11,057 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:38:11,057 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:38:11,058 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:38:11,058 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:38:11,058 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:38:11,058 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:38:11,058 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 15:38:11,058 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:38:11,058 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:38:11,059 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:38:11,059 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 15:38:11,059 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:38:11,059 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 15:38:11,059 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 15:38:11,061 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 15:38:11,061 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:38:11,061 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 15:38:11,061 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:38:11,061 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 15:38:11,061 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:38:11,061 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:38:11,061 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:38:11,061 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:38:11,062 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:38:11,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:38:11,062 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:38:11,062 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:38:11,062 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 15:38:11,062 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-13 15:38:11,062 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 15:38:11,062 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:38:11,062 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:38:11,062 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:38:11,063 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:38:11,063 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_93236f00-181b-4392-9c9e-59ecfdf65e5c/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 -> 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c [2024-11-13 15:38:11,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:38:11,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:38:11,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:38:11,424 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:38:11,424 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:38:11,426 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c Unable to find full path for "g++" [2024-11-13 15:38:13,552 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:38:13,799 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:38:13,800 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2024-11-13 15:38:13,812 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/data/86e366b09/c067e565b8294c95b57a500f46302824/FLAG30449e750 [2024-11-13 15:38:13,840 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/data/86e366b09/c067e565b8294c95b57a500f46302824 [2024-11-13 15:38:13,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:38:13,845 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:38:13,847 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:38:13,847 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:38:13,852 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:38:13,852 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:38:13" (1/1) ... [2024-11-13 15:38:13,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141efeef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:13, skipping insertion in model container [2024-11-13 15:38:13,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:38:13" (1/1) ... [2024-11-13 15:38:13,874 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:38:14,057 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_93236f00-181b-4392-9c9e-59ecfdf65e5c/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2024-11-13 15:38:14,067 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_93236f00-181b-4392-9c9e-59ecfdf65e5c/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2024-11-13 15:38:14,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:38:14,140 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:38:14,155 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_93236f00-181b-4392-9c9e-59ecfdf65e5c/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2024-11-13 15:38:14,157 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_93236f00-181b-4392-9c9e-59ecfdf65e5c/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2024-11-13 15:38:14,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:38:14,215 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:38:14,216 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14 WrapperNode [2024-11-13 15:38:14,216 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:38:14,219 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:38:14,219 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:38:14,219 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:38:14,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (1/1) ... [2024-11-13 15:38:14,236 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (1/1) ... [2024-11-13 15:38:14,256 INFO L138 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-11-13 15:38:14,257 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:38:14,258 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:38:14,258 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:38:14,258 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:38:14,267 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (1/1) ... [2024-11-13 15:38:14,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (1/1) ... [2024-11-13 15:38:14,271 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (1/1) ... [2024-11-13 15:38:14,284 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-13 15:38:14,285 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (1/1) ... [2024-11-13 15:38:14,285 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (1/1) ... [2024-11-13 15:38:14,296 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (1/1) ... [2024-11-13 15:38:14,301 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (1/1) ... [2024-11-13 15:38:14,303 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (1/1) ... [2024-11-13 15:38:14,304 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (1/1) ... [2024-11-13 15:38:14,307 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:38:14,308 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:38:14,308 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:38:14,308 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:38:14,309 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (1/1) ... [2024-11-13 15:38:14,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:38:14,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:38:14,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:38:14,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:38:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:38:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-13 15:38:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-13 15:38:14,387 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-13 15:38:14,387 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-13 15:38:14,387 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-13 15:38:14,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:38:14,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:38:14,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 15:38:14,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 15:38:14,476 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:38:14,478 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:38:19,131 INFO L? ?]: Removed 44 outVars from TransFormulas that were not future-live. [2024-11-13 15:38:19,132 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:38:19,143 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:38:19,146 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 15:38:19,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:38:19 BoogieIcfgContainer [2024-11-13 15:38:19,147 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:38:19,149 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:38:19,152 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:38:19,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:38:19,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:38:13" (1/3) ... [2024-11-13 15:38:19,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55eff082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:38:19, skipping insertion in model container [2024-11-13 15:38:19,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:38:14" (2/3) ... [2024-11-13 15:38:19,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55eff082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:38:19, skipping insertion in model container [2024-11-13 15:38:19,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:38:19" (3/3) ... [2024-11-13 15:38:19,160 INFO L112 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_4-2a.c.cil.c [2024-11-13 15:38:19,179 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:38:19,181 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG square_7+soft_float_4-2a.c.cil.c that has 4 procedures, 63 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-13 15:38:19,234 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:38:19,247 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;@71804544, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:38:19,247 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-13 15:38:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 15:38:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 15:38:19,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:38:19,259 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:38:19,260 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:38:19,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:38:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1912677092, now seen corresponding path program 1 times [2024-11-13 15:38:19,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:38:19,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263402998] [2024-11-13 15:38:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:38:19,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-13 15:38:19,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/mathsat [2024-11-13 15:38:19,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-13 15:38:19,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-13 15:38:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:38:19,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-13 15:38:19,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:38:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:38:19,930 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:38:19,930 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:38:19,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263402998] [2024-11-13 15:38:19,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263402998] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:38:19,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:38:19,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:38:19,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926820764] [2024-11-13 15:38:19,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:38:19,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 15:38:19,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:38:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 15:38:19,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 15:38:19,972 INFO L87 Difference]: Start difference. First operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:38:19,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:38:19,996 INFO L93 Difference]: Finished difference Result 121 states and 178 transitions. [2024-11-13 15:38:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 15:38:19,998 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-13 15:38:19,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:38:20,007 INFO L225 Difference]: With dead ends: 121 [2024-11-13 15:38:20,007 INFO L226 Difference]: Without dead ends: 56 [2024-11-13 15:38:20,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 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 15:38:20,017 INFO L432 NwaCegarLoop]: 81 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, 81 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 15:38:20,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:38:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-13 15:38:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-13 15:38:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 45 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-13 15:38:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2024-11-13 15:38:20,057 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 7 [2024-11-13 15:38:20,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:38:20,058 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2024-11-13 15:38:20,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:38:20,058 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2024-11-13 15:38:20,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 15:38:20,059 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:38:20,059 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:38:20,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-13 15:38:20,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-13 15:38:20,260 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:38:20,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:38:20,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1912736674, now seen corresponding path program 1 times [2024-11-13 15:38:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:38:20,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159767868] [2024-11-13 15:38:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:38:20,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-13 15:38:20,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/mathsat [2024-11-13 15:38:20,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-13 15:38:20,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-13 15:42:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:42:39,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:42:39,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:42:47,917 WARN L286 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 15:42:56,035 WARN L286 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 15:43:04,341 WARN L286 SmtUtils]: Spent 8.31s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 15:43:08,440 WARN L851 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) |c_ULTIMATE.start_main1_~result~0#1|)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2024-11-13 15:43:24,886 WARN L286 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 15:43:33,204 WARN L286 SmtUtils]: Spent 8.32s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 15:43:41,331 WARN L286 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 15:43:53,711 WARN L286 SmtUtils]: Spent 8.31s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 15:44:01,436 WARN L286 SmtUtils]: Spent 7.72s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 15:44:09,586 WARN L286 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-13 15:44:13,707 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from false [2024-11-13 15:44:17,780 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from true [2024-11-13 15:44:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:44:17,780 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:44:17,780 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:44:17,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159767868] [2024-11-13 15:44:17,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159767868] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:44:17,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:44:17,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:44:17,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159286901] [2024-11-13 15:44:17,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:44:17,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 15:44:17,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:44:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 15:44:17,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-13 15:44:17,787 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:22,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 15:44:26,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 15:44:30,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 15:44:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:30,574 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2024-11-13 15:44:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:44:30,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-13 15:44:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:30,576 INFO L225 Difference]: With dead ends: 56 [2024-11-13 15:44:30,576 INFO L226 Difference]: Without dead ends: 51 [2024-11-13 15:44:30,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-13 15:44:30,577 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 67 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:30,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 172 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 3 Unknown, 146 Unchecked, 12.8s Time] [2024-11-13 15:44:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-13 15:44:30,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-13 15:44:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.358974358974359) internal successors, (53), 40 states have internal predecessors, (53), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-13 15:44:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2024-11-13 15:44:30,587 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 7 [2024-11-13 15:44:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:30,587 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2024-11-13 15:44:30,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:44:30,588 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2024-11-13 15:44:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-13 15:44:30,589 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:30,589 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:30,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-13 15:44:30,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-13 15:44:30,789 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:30,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:30,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1218084098, now seen corresponding path program 1 times [2024-11-13 15:44:30,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:30,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874475482] [2024-11-13 15:44:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:30,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:30,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:30,794 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:30,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:44:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:30,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 15:44:30,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:44:31,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:44:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:44:32,354 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:44:32,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874475482] [2024-11-13 15:44:32,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874475482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:44:32,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:44:32,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-13 15:44:32,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597140661] [2024-11-13 15:44:32,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:44:32,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:44:32,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:44:32,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:44:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:44:32,357 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:44:33,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:33,429 INFO L93 Difference]: Finished difference Result 100 states and 136 transitions. [2024-11-13 15:44:33,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:44:33,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-11-13 15:44:33,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:33,432 INFO L225 Difference]: With dead ends: 100 [2024-11-13 15:44:33,433 INFO L226 Difference]: Without dead ends: 72 [2024-11-13 15:44:33,433 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:44:33,434 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 14 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:33,434 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 480 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 15:44:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-13 15:44:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2024-11-13 15:44:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.3125) internal successors, (63), 50 states have internal predecessors, (63), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-13 15:44:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2024-11-13 15:44:33,453 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 32 [2024-11-13 15:44:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:33,453 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2024-11-13 15:44:33,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:44:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2024-11-13 15:44:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 15:44:33,455 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:33,455 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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 15:44:33,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 15:44:33,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:33,657 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:33,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:33,657 INFO L85 PathProgramCache]: Analyzing trace with hash -59709518, now seen corresponding path program 1 times [2024-11-13 15:44:33,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:33,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100383861] [2024-11-13 15:44:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:33,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:33,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:33,660 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:33,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:44:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:33,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 15:44:33,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 15:44:35,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:44:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:44:36,776 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:44:36,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100383861] [2024-11-13 15:44:36,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100383861] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 15:44:36,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:44:36,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 16 [2024-11-13 15:44:36,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113368730] [2024-11-13 15:44:36,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:44:36,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:44:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:44:36,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:44:36,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:44:36,778 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:44:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:37,661 INFO L93 Difference]: Finished difference Result 128 states and 170 transitions. [2024-11-13 15:44:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:44:37,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2024-11-13 15:44:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:37,663 INFO L225 Difference]: With dead ends: 128 [2024-11-13 15:44:37,663 INFO L226 Difference]: Without dead ends: 96 [2024-11-13 15:44:37,664 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:44:37,665 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 24 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:37,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 500 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 15:44:37,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-13 15:44:37,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2024-11-13 15:44:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 69 states have internal predecessors, (86), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-13 15:44:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2024-11-13 15:44:37,679 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 36 [2024-11-13 15:44:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:37,680 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2024-11-13 15:44:37,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:44:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2024-11-13 15:44:37,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 15:44:37,681 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:37,682 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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 15:44:37,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 15:44:37,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:37,886 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:37,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:37,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2451216, now seen corresponding path program 1 times [2024-11-13 15:44:37,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:37,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533130529] [2024-11-13 15:44:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:37,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:37,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:37,888 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:37,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:44:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:37,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:44:37,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:44:38,616 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:44:38,616 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:44:38,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533130529] [2024-11-13 15:44:38,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533130529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:44:38,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:44:38,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 15:44:38,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522035925] [2024-11-13 15:44:38,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:44:38,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:44:38,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:44:38,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:44:38,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:44:38,618 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:44:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:39,172 INFO L93 Difference]: Finished difference Result 127 states and 166 transitions. [2024-11-13 15:44:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:44:39,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2024-11-13 15:44:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:39,174 INFO L225 Difference]: With dead ends: 127 [2024-11-13 15:44:39,174 INFO L226 Difference]: Without dead ends: 87 [2024-11-13 15:44:39,175 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:44:39,175 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 12 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:39,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 426 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 15:44:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-13 15:44:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2024-11-13 15:44:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 56 states have internal predecessors, (69), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-13 15:44:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2024-11-13 15:44:39,186 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 36 [2024-11-13 15:44:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:39,187 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2024-11-13 15:44:39,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:44:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2024-11-13 15:44:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 15:44:39,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:39,189 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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 15:44:39,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 15:44:39,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:39,390 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:39,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:39,391 INFO L85 PathProgramCache]: Analyzing trace with hash 878052919, now seen corresponding path program 1 times [2024-11-13 15:44:39,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:39,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827906249] [2024-11-13 15:44:39,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:39,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:39,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:39,393 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:39,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:44:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:39,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 15:44:39,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:44:40,388 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:44:40,388 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:44:40,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827906249] [2024-11-13 15:44:40,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827906249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:44:40,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:44:40,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 15:44:40,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187306726] [2024-11-13 15:44:40,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:44:40,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:44:40,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:44:40,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:44:40,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:44:40,390 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:44:41,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:41,434 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2024-11-13 15:44:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:44:41,435 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-11-13 15:44:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:41,439 INFO L225 Difference]: With dead ends: 109 [2024-11-13 15:44:41,440 INFO L226 Difference]: Without dead ends: 86 [2024-11-13 15:44:41,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:44:41,441 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 13 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:41,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 509 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 15:44:41,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-13 15:44:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2024-11-13 15:44:41,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 62 states have internal predecessors, (76), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-13 15:44:41,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 103 transitions. [2024-11-13 15:44:41,456 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 103 transitions. Word has length 40 [2024-11-13 15:44:41,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:41,456 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 103 transitions. [2024-11-13 15:44:41,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:44:41,457 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 103 transitions. [2024-11-13 15:44:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 15:44:41,458 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:41,458 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:41,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 15:44:41,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:41,663 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:41,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1111721854, now seen corresponding path program 2 times [2024-11-13 15:44:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:41,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032542630] [2024-11-13 15:44:41,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:44:41,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:41,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:41,667 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:41,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 15:44:41,730 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 15:44:41,731 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:44:41,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:44:41,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:44:43,391 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:44:43,391 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:44:43,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032542630] [2024-11-13 15:44:43,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032542630] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:44:43,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:44:43,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-13 15:44:43,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809240648] [2024-11-13 15:44:43,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:44:43,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:44:43,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:44:43,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:44:43,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:44:43,394 INFO L87 Difference]: Start difference. First operand 80 states and 103 transitions. Second operand has 12 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:44:45,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:45,746 INFO L93 Difference]: Finished difference Result 155 states and 202 transitions. [2024-11-13 15:44:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:44:45,747 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-13 15:44:45,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:45,748 INFO L225 Difference]: With dead ends: 155 [2024-11-13 15:44:45,748 INFO L226 Difference]: Without dead ends: 123 [2024-11-13 15:44:45,749 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:44:45,749 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 40 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:45,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1008 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 15:44:45,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-13 15:44:45,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2024-11-13 15:44:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 88 states have internal predecessors, (106), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (23), 15 states have call predecessors, (23), 15 states have call successors, (23) [2024-11-13 15:44:45,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2024-11-13 15:44:45,777 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 40 [2024-11-13 15:44:45,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:45,777 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2024-11-13 15:44:45,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:44:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2024-11-13 15:44:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 15:44:45,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:45,781 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 15:44:45,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-13 15:44:45,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:45,982 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:45,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash 411710150, now seen corresponding path program 1 times [2024-11-13 15:44:45,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:45,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049728098] [2024-11-13 15:44:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:45,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:45,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:45,984 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:45,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 15:44:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:46,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:44:46,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:44:46,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:44:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:44:47,164 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:44:47,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049728098] [2024-11-13 15:44:47,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049728098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:44:47,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:44:47,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-13 15:44:47,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786053193] [2024-11-13 15:44:47,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:44:47,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:44:47,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:44:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:44:47,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:44:47,165 INFO L87 Difference]: Start difference. First operand 113 states and 145 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:44:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:47,961 INFO L93 Difference]: Finished difference Result 217 states and 283 transitions. [2024-11-13 15:44:47,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:44:47,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-11-13 15:44:47,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:47,963 INFO L225 Difference]: With dead ends: 217 [2024-11-13 15:44:47,963 INFO L226 Difference]: Without dead ends: 172 [2024-11-13 15:44:47,964 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:44:47,964 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 36 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:47,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 665 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 15:44:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-13 15:44:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 149. [2024-11-13 15:44:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 112 states have (on average 1.25) internal successors, (140), 115 states have internal predecessors, (140), 23 states have call successors, (23), 11 states have call predecessors, (23), 13 states have return successors, (32), 22 states have call predecessors, (32), 22 states have call successors, (32) [2024-11-13 15:44:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 195 transitions. [2024-11-13 15:44:47,991 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 195 transitions. Word has length 40 [2024-11-13 15:44:47,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:47,991 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 195 transitions. [2024-11-13 15:44:47,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:44:47,991 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 195 transitions. [2024-11-13 15:44:47,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 15:44:47,993 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:47,993 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 15:44:48,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 15:44:48,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:48,193 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:48,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:48,194 INFO L85 PathProgramCache]: Analyzing trace with hash 468968452, now seen corresponding path program 1 times [2024-11-13 15:44:48,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:48,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385579832] [2024-11-13 15:44:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:48,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:48,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:48,196 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:48,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 15:44:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:48,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:44:48,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:44:49,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:44:52,344 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:44:52,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385579832] [2024-11-13 15:44:52,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385579832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:44:52,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [545552145] [2024-11-13 15:44:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:52,344 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:44:52,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:44:52,346 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:44:52,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-13 15:44:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:52,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:44:52,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:44:52,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:44:53,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [545552145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:44:53,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:44:53,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2024-11-13 15:44:53,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137938769] [2024-11-13 15:44:53,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:44:53,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:44:53,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:44:53,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:44:53,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:44:53,084 INFO L87 Difference]: Start difference. First operand 149 states and 195 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:44:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:54,876 INFO L93 Difference]: Finished difference Result 182 states and 230 transitions. [2024-11-13 15:44:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:44:54,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-11-13 15:44:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:54,878 INFO L225 Difference]: With dead ends: 182 [2024-11-13 15:44:54,879 INFO L226 Difference]: Without dead ends: 180 [2024-11-13 15:44:54,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-13 15:44:54,881 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 38 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:54,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 951 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 15:44:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-13 15:44:54,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 157. [2024-11-13 15:44:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 118 states have (on average 1.2372881355932204) internal successors, (146), 121 states have internal predecessors, (146), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (32), 22 states have call predecessors, (32), 22 states have call successors, (32) [2024-11-13 15:44:54,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 201 transitions. [2024-11-13 15:44:54,912 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 201 transitions. Word has length 40 [2024-11-13 15:44:54,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:54,912 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 201 transitions. [2024-11-13 15:44:54,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:44:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 201 transitions. [2024-11-13 15:44:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 15:44:54,915 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:54,915 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:54,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2024-11-13 15:44:55,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 15:44:55,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:55,316 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:55,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:55,316 INFO L85 PathProgramCache]: Analyzing trace with hash 150218242, now seen corresponding path program 1 times [2024-11-13 15:44:55,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:55,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607979529] [2024-11-13 15:44:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:55,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:55,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:55,318 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:55,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 15:44:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:55,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 15:44:55,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:44:56,127 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:44:56,128 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:44:56,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607979529] [2024-11-13 15:44:56,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607979529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:44:56,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:44:56,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 15:44:56,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878057828] [2024-11-13 15:44:56,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:44:56,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:44:56,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:44:56,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:44:56,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:44:56,129 INFO L87 Difference]: Start difference. First operand 157 states and 201 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:44:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:56,839 INFO L93 Difference]: Finished difference Result 174 states and 219 transitions. [2024-11-13 15:44:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:44:56,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-13 15:44:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:56,841 INFO L225 Difference]: With dead ends: 174 [2024-11-13 15:44:56,841 INFO L226 Difference]: Without dead ends: 172 [2024-11-13 15:44:56,842 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 15:44:56,842 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 3 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:56,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 314 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 15:44:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-13 15:44:56,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 163. [2024-11-13 15:44:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 122 states have (on average 1.2377049180327868) internal successors, (151), 126 states have internal predecessors, (151), 24 states have call successors, (24), 14 states have call predecessors, (24), 16 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2024-11-13 15:44:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 208 transitions. [2024-11-13 15:44:56,862 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 208 transitions. Word has length 40 [2024-11-13 15:44:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:56,862 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 208 transitions. [2024-11-13 15:44:56,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:44:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 208 transitions. [2024-11-13 15:44:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 15:44:56,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:56,864 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:44:56,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 15:44:57,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:57,064 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:57,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:57,065 INFO L85 PathProgramCache]: Analyzing trace with hash 207476544, now seen corresponding path program 1 times [2024-11-13 15:44:57,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:57,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390235450] [2024-11-13 15:44:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:57,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:57,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:57,067 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:57,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 15:44:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:57,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 15:44:57,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:44:57,649 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:44:57,649 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:44:57,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390235450] [2024-11-13 15:44:57,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390235450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:44:57,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:44:57,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 15:44:57,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917663193] [2024-11-13 15:44:57,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:44:57,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:44:57,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:44:57,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:44:57,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:44:57,651 INFO L87 Difference]: Start difference. First operand 163 states and 208 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:44:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:44:58,287 INFO L93 Difference]: Finished difference Result 169 states and 213 transitions. [2024-11-13 15:44:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:44:58,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-13 15:44:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:44:58,289 INFO L225 Difference]: With dead ends: 169 [2024-11-13 15:44:58,290 INFO L226 Difference]: Without dead ends: 167 [2024-11-13 15:44:58,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 15:44:58,290 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:44:58,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 309 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 15:44:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-13 15:44:58,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2024-11-13 15:44:58,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 124 states have internal predecessors, (149), 23 states have call successors, (23), 14 states have call predecessors, (23), 16 states have return successors, (32), 22 states have call predecessors, (32), 22 states have call successors, (32) [2024-11-13 15:44:58,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 204 transitions. [2024-11-13 15:44:58,310 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 204 transitions. Word has length 40 [2024-11-13 15:44:58,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:44:58,310 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 204 transitions. [2024-11-13 15:44:58,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 15:44:58,310 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 204 transitions. [2024-11-13 15:44:58,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 15:44:58,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:44:58,312 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] [2024-11-13 15:44:58,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 15:44:58,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:58,513 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:44:58,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:44:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash -163768872, now seen corresponding path program 1 times [2024-11-13 15:44:58,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:44:58,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412944112] [2024-11-13 15:44:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:44:58,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:44:58,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:44:58,516 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:44:58,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 15:44:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:44:58,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:44:58,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:44:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:44:59,400 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:45:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:45:00,197 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:45:00,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412944112] [2024-11-13 15:45:00,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412944112] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:45:00,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:45:00,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-11-13 15:45:00,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011989343] [2024-11-13 15:45:00,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:45:00,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:45:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:45:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:45:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:45:00,199 INFO L87 Difference]: Start difference. First operand 161 states and 204 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:45:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:45:00,907 INFO L93 Difference]: Finished difference Result 198 states and 251 transitions. [2024-11-13 15:45:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:45:00,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2024-11-13 15:45:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:45:00,909 INFO L225 Difference]: With dead ends: 198 [2024-11-13 15:45:00,909 INFO L226 Difference]: Without dead ends: 187 [2024-11-13 15:45:00,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:45:00,910 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 29 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:45:00,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 427 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 15:45:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-13 15:45:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 175. [2024-11-13 15:45:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 130 states have (on average 1.2230769230769232) internal successors, (159), 135 states have internal predecessors, (159), 26 states have call successors, (26), 14 states have call predecessors, (26), 18 states have return successors, (38), 25 states have call predecessors, (38), 25 states have call successors, (38) [2024-11-13 15:45:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 223 transitions. [2024-11-13 15:45:00,932 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 223 transitions. Word has length 45 [2024-11-13 15:45:00,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:45:00,932 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 223 transitions. [2024-11-13 15:45:00,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:45:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 223 transitions. [2024-11-13 15:45:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 15:45:00,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:45:00,934 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:45:00,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 15:45:01,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:01,135 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:45:01,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:45:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash 537295706, now seen corresponding path program 1 times [2024-11-13 15:45:01,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:45:01,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528404885] [2024-11-13 15:45:01,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:45:01,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:01,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:45:01,137 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:45:01,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 15:45:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:45:01,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:45:01,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:45:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:45:02,427 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:45:02,427 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:45:02,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528404885] [2024-11-13 15:45:02,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528404885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:45:02,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:45:02,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 15:45:02,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008949089] [2024-11-13 15:45:02,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:45:02,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:45:02,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:45:02,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:45:02,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:45:02,429 INFO L87 Difference]: Start difference. First operand 175 states and 223 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:45:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:45:04,355 INFO L93 Difference]: Finished difference Result 230 states and 293 transitions. [2024-11-13 15:45:04,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:45:04,355 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2024-11-13 15:45:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:45:04,357 INFO L225 Difference]: With dead ends: 230 [2024-11-13 15:45:04,357 INFO L226 Difference]: Without dead ends: 223 [2024-11-13 15:45:04,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:45:04,358 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 23 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:45:04,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 662 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 15:45:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-13 15:45:04,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 177. [2024-11-13 15:45:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 136 states have internal predecessors, (161), 26 states have call successors, (26), 14 states have call predecessors, (26), 18 states have return successors, (38), 26 states have call predecessors, (38), 25 states have call successors, (38) [2024-11-13 15:45:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 225 transitions. [2024-11-13 15:45:04,388 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 225 transitions. Word has length 45 [2024-11-13 15:45:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:45:04,388 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 225 transitions. [2024-11-13 15:45:04,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:45:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 225 transitions. [2024-11-13 15:45:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 15:45:04,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:45:04,391 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:45:04,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 15:45:04,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:04,595 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:45:04,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:45:04,595 INFO L85 PathProgramCache]: Analyzing trace with hash 497726880, now seen corresponding path program 1 times [2024-11-13 15:45:04,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:45:04,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450847931] [2024-11-13 15:45:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:45:04,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:04,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:45:04,598 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:45:04,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 15:45:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:45:04,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:45:04,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:45:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:45:05,919 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:45:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:45:07,641 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:45:07,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450847931] [2024-11-13 15:45:07,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450847931] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:45:07,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:45:07,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2024-11-13 15:45:07,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326248102] [2024-11-13 15:45:07,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:45:07,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:45:07,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:45:07,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:45:07,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:45:07,645 INFO L87 Difference]: Start difference. First operand 177 states and 225 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:45:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:45:10,082 INFO L93 Difference]: Finished difference Result 237 states and 301 transitions. [2024-11-13 15:45:10,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:45:10,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-11-13 15:45:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:45:10,085 INFO L225 Difference]: With dead ends: 237 [2024-11-13 15:45:10,085 INFO L226 Difference]: Without dead ends: 229 [2024-11-13 15:45:10,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:45:10,086 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 23 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:45:10,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 777 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-13 15:45:10,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-13 15:45:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 188. [2024-11-13 15:45:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 141 states have (on average 1.2127659574468086) internal successors, (171), 144 states have internal predecessors, (171), 27 states have call successors, (27), 14 states have call predecessors, (27), 19 states have return successors, (40), 29 states have call predecessors, (40), 26 states have call successors, (40) [2024-11-13 15:45:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 238 transitions. [2024-11-13 15:45:10,110 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 238 transitions. Word has length 47 [2024-11-13 15:45:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:45:10,110 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 238 transitions. [2024-11-13 15:45:10,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:45:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 238 transitions. [2024-11-13 15:45:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 15:45:10,112 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:45:10,112 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:45:10,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 15:45:10,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:10,312 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:45:10,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:45:10,313 INFO L85 PathProgramCache]: Analyzing trace with hash 554985182, now seen corresponding path program 1 times [2024-11-13 15:45:10,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:45:10,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347951635] [2024-11-13 15:45:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:45:10,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:10,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:45:10,315 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:45:10,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 15:45:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:45:10,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 15:45:10,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:45:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 15:45:10,699 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:45:10,699 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:45:10,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347951635] [2024-11-13 15:45:10,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347951635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:45:10,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:45:10,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 15:45:10,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95037126] [2024-11-13 15:45:10,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:45:10,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:45:10,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:45:10,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:45:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:45:10,701 INFO L87 Difference]: Start difference. First operand 188 states and 238 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 15:45:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:45:10,975 INFO L93 Difference]: Finished difference Result 196 states and 245 transitions. [2024-11-13 15:45:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:45:10,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2024-11-13 15:45:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:45:10,977 INFO L225 Difference]: With dead ends: 196 [2024-11-13 15:45:10,977 INFO L226 Difference]: Without dead ends: 181 [2024-11-13 15:45:10,977 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 15:45:10,977 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:45:10,978 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 317 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:45:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-13 15:45:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-13 15:45:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 136 states have (on average 1.2058823529411764) internal successors, (164), 140 states have internal predecessors, (164), 25 states have call successors, (25), 14 states have call predecessors, (25), 19 states have return successors, (37), 26 states have call predecessors, (37), 24 states have call successors, (37) [2024-11-13 15:45:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2024-11-13 15:45:10,999 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 47 [2024-11-13 15:45:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:45:10,999 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2024-11-13 15:45:11,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 15:45:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2024-11-13 15:45:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 15:45:11,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:45:11,002 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:45:11,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 15:45:11,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:11,202 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:45:11,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:45:11,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1374560520, now seen corresponding path program 1 times [2024-11-13 15:45:11,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:45:11,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153741157] [2024-11-13 15:45:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:45:11,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:11,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:45:11,204 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:45:11,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 15:45:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:45:11,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:45:11,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:45:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:45:12,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:45:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:45:14,309 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:45:14,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153741157] [2024-11-13 15:45:14,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153741157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:45:14,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:45:14,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2024-11-13 15:45:14,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056453859] [2024-11-13 15:45:14,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:45:14,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 15:45:14,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:45:14,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 15:45:14,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:45:14,311 INFO L87 Difference]: Start difference. First operand 181 states and 226 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:45:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:45:18,812 INFO L93 Difference]: Finished difference Result 265 states and 341 transitions. [2024-11-13 15:45:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 15:45:18,813 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2024-11-13 15:45:18,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:45:18,815 INFO L225 Difference]: With dead ends: 265 [2024-11-13 15:45:18,815 INFO L226 Difference]: Without dead ends: 258 [2024-11-13 15:45:18,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-11-13 15:45:18,816 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 49 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:45:18,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 735 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-13 15:45:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-13 15:45:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 191. [2024-11-13 15:45:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 142 states have (on average 1.1971830985915493) internal successors, (170), 148 states have internal predecessors, (170), 27 states have call successors, (27), 14 states have call predecessors, (27), 21 states have return successors, (42), 28 states have call predecessors, (42), 26 states have call successors, (42) [2024-11-13 15:45:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 239 transitions. [2024-11-13 15:45:18,843 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 239 transitions. Word has length 49 [2024-11-13 15:45:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:45:18,843 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 239 transitions. [2024-11-13 15:45:18,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:45:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 239 transitions. [2024-11-13 15:45:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 15:45:18,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:45:18,845 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:45:18,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 15:45:19,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:19,046 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:45:19,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:45:19,046 INFO L85 PathProgramCache]: Analyzing trace with hash -811059900, now seen corresponding path program 1 times [2024-11-13 15:45:19,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:45:19,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400690624] [2024-11-13 15:45:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:45:19,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:19,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:45:19,048 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:45:19,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 15:45:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:45:19,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:45:19,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:45:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:45:20,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:45:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:45:24,351 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:45:24,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400690624] [2024-11-13 15:45:24,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400690624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:45:24,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:45:24,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-13 15:45:24,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681207565] [2024-11-13 15:45:24,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:45:24,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 15:45:24,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:45:24,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 15:45:24,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-13 15:45:24,353 INFO L87 Difference]: Start difference. First operand 191 states and 239 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:45:34,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:45:34,536 INFO L93 Difference]: Finished difference Result 279 states and 371 transitions. [2024-11-13 15:45:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 15:45:34,537 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2024-11-13 15:45:34,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:45:34,539 INFO L225 Difference]: With dead ends: 279 [2024-11-13 15:45:34,539 INFO L226 Difference]: Without dead ends: 264 [2024-11-13 15:45:34,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2024-11-13 15:45:34,540 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 54 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:45:34,540 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1248 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-11-13 15:45:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-13 15:45:34,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 209. [2024-11-13 15:45:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 154 states have (on average 1.1948051948051948) internal successors, (184), 164 states have internal predecessors, (184), 30 states have call successors, (30), 14 states have call predecessors, (30), 24 states have return successors, (58), 30 states have call predecessors, (58), 28 states have call successors, (58) [2024-11-13 15:45:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 272 transitions. [2024-11-13 15:45:34,579 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 272 transitions. Word has length 49 [2024-11-13 15:45:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:45:34,581 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 272 transitions. [2024-11-13 15:45:34,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:45:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 272 transitions. [2024-11-13 15:45:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 15:45:34,582 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:45:34,583 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:45:34,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 15:45:34,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:34,783 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:45:34,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:45:34,784 INFO L85 PathProgramCache]: Analyzing trace with hash -870479576, now seen corresponding path program 2 times [2024-11-13 15:45:34,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:45:34,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487496599] [2024-11-13 15:45:34,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:45:34,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:34,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:45:34,786 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:45:34,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 15:45:34,841 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:45:34,841 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:45:34,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:45:34,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:45:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:45:36,118 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:45:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:45:37,475 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:45:37,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487496599] [2024-11-13 15:45:37,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487496599] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:45:37,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:45:37,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2024-11-13 15:45:37,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179825457] [2024-11-13 15:45:37,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:45:37,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:45:37,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:45:37,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:45:37,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:45:37,477 INFO L87 Difference]: Start difference. First operand 209 states and 272 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:45:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:45:41,959 INFO L93 Difference]: Finished difference Result 269 states and 370 transitions. [2024-11-13 15:45:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 15:45:41,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2024-11-13 15:45:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:45:41,962 INFO L225 Difference]: With dead ends: 269 [2024-11-13 15:45:41,962 INFO L226 Difference]: Without dead ends: 262 [2024-11-13 15:45:41,963 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:45:41,963 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 73 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:45:41,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 870 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-13 15:45:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-13 15:45:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 213. [2024-11-13 15:45:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 156 states have (on average 1.1923076923076923) internal successors, (186), 166 states have internal predecessors, (186), 32 states have call successors, (32), 14 states have call predecessors, (32), 24 states have return successors, (61), 32 states have call predecessors, (61), 30 states have call successors, (61) [2024-11-13 15:45:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 279 transitions. [2024-11-13 15:45:42,009 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 279 transitions. Word has length 49 [2024-11-13 15:45:42,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:45:42,009 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 279 transitions. [2024-11-13 15:45:42,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 12 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:45:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 279 transitions. [2024-11-13 15:45:42,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 15:45:42,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:45:42,012 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:45:42,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 15:45:42,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:42,213 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:45:42,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:45:42,213 INFO L85 PathProgramCache]: Analyzing trace with hash 963344748, now seen corresponding path program 2 times [2024-11-13 15:45:42,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:45:42,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782952199] [2024-11-13 15:45:42,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:45:42,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:42,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:45:42,216 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:45:42,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 15:45:42,288 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:45:42,288 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:45:42,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:45:42,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:45:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:45:43,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:45:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:45:47,486 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:45:47,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782952199] [2024-11-13 15:45:47,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782952199] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:45:47,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:45:47,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-13 15:45:47,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097627866] [2024-11-13 15:45:47,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:45:47,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 15:45:47,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:45:47,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 15:45:47,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-13 15:45:47,487 INFO L87 Difference]: Start difference. First operand 213 states and 279 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:45:55,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:45:55,003 INFO L93 Difference]: Finished difference Result 277 states and 374 transitions. [2024-11-13 15:45:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 15:45:55,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2024-11-13 15:45:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:45:55,006 INFO L225 Difference]: With dead ends: 277 [2024-11-13 15:45:55,006 INFO L226 Difference]: Without dead ends: 260 [2024-11-13 15:45:55,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 15:45:55,007 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 73 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:45:55,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1034 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-13 15:45:55,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-13 15:45:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 218. [2024-11-13 15:45:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 159 states have (on average 1.1823899371069182) internal successors, (188), 171 states have internal predecessors, (188), 32 states have call successors, (32), 14 states have call predecessors, (32), 26 states have return successors, (66), 32 states have call predecessors, (66), 30 states have call successors, (66) [2024-11-13 15:45:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 286 transitions. [2024-11-13 15:45:55,045 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 286 transitions. Word has length 49 [2024-11-13 15:45:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:45:55,045 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 286 transitions. [2024-11-13 15:45:55,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:45:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 286 transitions. [2024-11-13 15:45:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 15:45:55,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:45:55,047 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 15:45:55,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 15:45:55,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:55,248 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:45:55,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:45:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1643476896, now seen corresponding path program 1 times [2024-11-13 15:45:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:45:55,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72331776] [2024-11-13 15:45:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:45:55,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:45:55,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:45:55,250 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:45:55,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 15:45:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:45:55,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 15:45:55,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:45:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:45:57,625 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:45:57,625 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:45:57,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72331776] [2024-11-13 15:45:57,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72331776] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:45:57,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:45:57,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-13 15:45:57,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515750882] [2024-11-13 15:45:57,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:45:57,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:45:57,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:45:57,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:45:57,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:45:57,626 INFO L87 Difference]: Start difference. First operand 218 states and 286 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:46:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:00,675 INFO L93 Difference]: Finished difference Result 320 states and 433 transitions. [2024-11-13 15:46:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 15:46:00,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 50 [2024-11-13 15:46:00,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:00,677 INFO L225 Difference]: With dead ends: 320 [2024-11-13 15:46:00,677 INFO L226 Difference]: Without dead ends: 261 [2024-11-13 15:46:00,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-13 15:46:00,679 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 32 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:00,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1121 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-13 15:46:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-13 15:46:00,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 234. [2024-11-13 15:46:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 171 states have (on average 1.1637426900584795) internal successors, (199), 182 states have internal predecessors, (199), 36 states have call successors, (36), 15 states have call predecessors, (36), 26 states have return successors, (69), 36 states have call predecessors, (69), 34 states have call successors, (69) [2024-11-13 15:46:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 304 transitions. [2024-11-13 15:46:00,718 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 304 transitions. Word has length 50 [2024-11-13 15:46:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:00,719 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 304 transitions. [2024-11-13 15:46:00,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:46:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 304 transitions. [2024-11-13 15:46:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 15:46:00,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:00,720 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] [2024-11-13 15:46:00,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-13 15:46:00,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:00,921 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:00,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:00,921 INFO L85 PathProgramCache]: Analyzing trace with hash 388115684, now seen corresponding path program 1 times [2024-11-13 15:46:00,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:46:00,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076148944] [2024-11-13 15:46:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:00,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:00,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:00,924 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:00,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 15:46:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:00,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:46:00,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:46:02,508 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:46:03,713 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:46:03,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076148944] [2024-11-13 15:46:03,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076148944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:46:03,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1635566843] [2024-11-13 15:46:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:03,714 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:46:03,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:46:03,716 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:46:03,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-11-13 15:46:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:03,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:46:03,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:46:04,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:46:04,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1635566843] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:46:04,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:46:04,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2024-11-13 15:46:04,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653579988] [2024-11-13 15:46:04,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:46:04,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:46:04,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:46:04,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:46:04,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:46:04,781 INFO L87 Difference]: Start difference. First operand 234 states and 304 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:46:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:07,129 INFO L93 Difference]: Finished difference Result 309 states and 402 transitions. [2024-11-13 15:46:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:46:07,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 50 [2024-11-13 15:46:07,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:07,132 INFO L225 Difference]: With dead ends: 309 [2024-11-13 15:46:07,132 INFO L226 Difference]: Without dead ends: 257 [2024-11-13 15:46:07,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:46:07,133 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 38 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:07,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 872 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 15:46:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-11-13 15:46:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 234. [2024-11-13 15:46:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 171 states have (on average 1.1578947368421053) internal successors, (198), 182 states have internal predecessors, (198), 36 states have call successors, (36), 15 states have call predecessors, (36), 26 states have return successors, (69), 36 states have call predecessors, (69), 34 states have call successors, (69) [2024-11-13 15:46:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 303 transitions. [2024-11-13 15:46:07,175 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 303 transitions. Word has length 50 [2024-11-13 15:46:07,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:07,175 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 303 transitions. [2024-11-13 15:46:07,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:46:07,176 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 303 transitions. [2024-11-13 15:46:07,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 15:46:07,177 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:07,177 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] [2024-11-13 15:46:07,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-13 15:46:07,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2024-11-13 15:46:07,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 15:46:07,578 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:07,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:07,579 INFO L85 PathProgramCache]: Analyzing trace with hash -616442850, now seen corresponding path program 1 times [2024-11-13 15:46:07,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:46:07,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059508839] [2024-11-13 15:46:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:07,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:07,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:07,581 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:07,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 15:46:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:07,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 15:46:07,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:46:09,160 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:46:09,160 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:46:09,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059508839] [2024-11-13 15:46:09,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059508839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:46:09,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:46:09,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-13 15:46:09,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314148966] [2024-11-13 15:46:09,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:46:09,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:46:09,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:46:09,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:46:09,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:46:09,161 INFO L87 Difference]: Start difference. First operand 234 states and 303 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:46:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:11,510 INFO L93 Difference]: Finished difference Result 301 states and 392 transitions. [2024-11-13 15:46:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:46:11,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-11-13 15:46:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:11,512 INFO L225 Difference]: With dead ends: 301 [2024-11-13 15:46:11,512 INFO L226 Difference]: Without dead ends: 249 [2024-11-13 15:46:11,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:46:11,514 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 40 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:11,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 754 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 15:46:11,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-13 15:46:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 234. [2024-11-13 15:46:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 171 states have (on average 1.152046783625731) internal successors, (197), 182 states have internal predecessors, (197), 36 states have call successors, (36), 15 states have call predecessors, (36), 26 states have return successors, (69), 36 states have call predecessors, (69), 34 states have call successors, (69) [2024-11-13 15:46:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2024-11-13 15:46:11,553 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 50 [2024-11-13 15:46:11,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:11,554 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2024-11-13 15:46:11,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:46:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2024-11-13 15:46:11,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 15:46:11,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:11,555 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 15:46:11,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-13 15:46:11,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:11,756 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:11,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1871804062, now seen corresponding path program 1 times [2024-11-13 15:46:11,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:46:11,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840745549] [2024-11-13 15:46:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:11,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:11,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:11,758 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:11,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 15:46:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:11,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 15:46:11,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:46:13,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:46:14,762 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:46:14,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840745549] [2024-11-13 15:46:14,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840745549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:46:14,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1839990077] [2024-11-13 15:46:14,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:14,762 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:46:14,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:46:14,764 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:46:14,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2024-11-13 15:46:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:14,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:46:14,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:46:15,351 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:46:15,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1839990077] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:46:15,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:46:15,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-13 15:46:15,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016591864] [2024-11-13 15:46:15,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:46:15,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:46:15,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:46:15,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:46:15,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:46:15,352 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:46:19,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:46:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:20,596 INFO L93 Difference]: Finished difference Result 257 states and 336 transitions. [2024-11-13 15:46:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:46:20,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-11-13 15:46:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:20,605 INFO L225 Difference]: With dead ends: 257 [2024-11-13 15:46:20,605 INFO L226 Difference]: Without dead ends: 255 [2024-11-13 15:46:20,606 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:46:20,606 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 13 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:20,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 368 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2024-11-13 15:46:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-13 15:46:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 239. [2024-11-13 15:46:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 174 states have (on average 1.1494252873563218) internal successors, (200), 186 states have internal predecessors, (200), 37 states have call successors, (37), 16 states have call predecessors, (37), 27 states have return successors, (70), 36 states have call predecessors, (70), 35 states have call successors, (70) [2024-11-13 15:46:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 307 transitions. [2024-11-13 15:46:20,677 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 307 transitions. Word has length 50 [2024-11-13 15:46:20,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:20,677 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 307 transitions. [2024-11-13 15:46:20,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:46:20,677 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 307 transitions. [2024-11-13 15:46:20,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 15:46:20,678 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:20,679 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 15:46:20,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2024-11-13 15:46:20,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 15:46:21,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:21,080 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:21,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:21,080 INFO L85 PathProgramCache]: Analyzing trace with hash -46426896, now seen corresponding path program 1 times [2024-11-13 15:46:21,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:46:21,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552925851] [2024-11-13 15:46:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:21,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:21,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:21,082 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:21,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 15:46:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:21,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:46:21,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:46:21,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:46:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 15:46:23,067 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:46:23,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552925851] [2024-11-13 15:46:23,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552925851] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:46:23,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:46:23,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-13 15:46:23,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335978979] [2024-11-13 15:46:23,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:46:23,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:46:23,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:46:23,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:46:23,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:46:23,069 INFO L87 Difference]: Start difference. First operand 239 states and 307 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-13 15:46:24,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:24,209 INFO L93 Difference]: Finished difference Result 279 states and 369 transitions. [2024-11-13 15:46:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:46:24,210 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 51 [2024-11-13 15:46:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:24,211 INFO L225 Difference]: With dead ends: 279 [2024-11-13 15:46:24,211 INFO L226 Difference]: Without dead ends: 262 [2024-11-13 15:46:24,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:46:24,212 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 5 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:24,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 917 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 15:46:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-13 15:46:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2024-11-13 15:46:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 179 states have (on average 1.1452513966480447) internal successors, (205), 192 states have internal predecessors, (205), 40 states have call successors, (40), 16 states have call predecessors, (40), 28 states have return successors, (86), 39 states have call predecessors, (86), 38 states have call successors, (86) [2024-11-13 15:46:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 331 transitions. [2024-11-13 15:46:24,258 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 331 transitions. Word has length 51 [2024-11-13 15:46:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:24,259 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 331 transitions. [2024-11-13 15:46:24,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-13 15:46:24,259 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 331 transitions. [2024-11-13 15:46:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 15:46:24,260 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:24,260 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 15:46:24,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 15:46:24,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:24,461 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:24,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:24,461 INFO L85 PathProgramCache]: Analyzing trace with hash -822885553, now seen corresponding path program 1 times [2024-11-13 15:46:24,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:46:24,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868741526] [2024-11-13 15:46:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:24,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:24,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:24,464 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:24,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 15:46:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:24,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:46:24,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:46:25,479 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:46:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:46:26,873 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:46:26,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868741526] [2024-11-13 15:46:26,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868741526] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:46:26,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:46:26,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-13 15:46:26,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189946174] [2024-11-13 15:46:26,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:46:26,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 15:46:26,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:46:26,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 15:46:26,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:46:26,874 INFO L87 Difference]: Start difference. First operand 248 states and 331 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 11 states have internal predecessors, (41), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 15:46:28,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:28,675 INFO L93 Difference]: Finished difference Result 324 states and 413 transitions. [2024-11-13 15:46:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:46:28,676 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 11 states have internal predecessors, (41), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2024-11-13 15:46:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:28,677 INFO L225 Difference]: With dead ends: 324 [2024-11-13 15:46:28,677 INFO L226 Difference]: Without dead ends: 242 [2024-11-13 15:46:28,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:46:28,678 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 32 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:28,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1183 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-13 15:46:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-11-13 15:46:28,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 234. [2024-11-13 15:46:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 171 states have (on average 1.1403508771929824) internal successors, (195), 182 states have internal predecessors, (195), 36 states have call successors, (36), 16 states have call predecessors, (36), 26 states have return successors, (77), 35 states have call predecessors, (77), 34 states have call successors, (77) [2024-11-13 15:46:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 308 transitions. [2024-11-13 15:46:28,718 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 308 transitions. Word has length 51 [2024-11-13 15:46:28,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:28,719 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 308 transitions. [2024-11-13 15:46:28,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 11 states have internal predecessors, (41), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 15:46:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 308 transitions. [2024-11-13 15:46:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 15:46:28,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:28,720 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 15:46:28,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 15:46:28,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:28,921 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:28,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:28,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1322157108, now seen corresponding path program 1 times [2024-11-13 15:46:28,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:46:28,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045844934] [2024-11-13 15:46:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:28,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:28,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:28,923 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:28,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 15:46:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:28,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 15:46:28,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:46:30,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:46:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 15:46:31,928 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:46:31,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045844934] [2024-11-13 15:46:31,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045844934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:46:31,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:46:31,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-13 15:46:31,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880877253] [2024-11-13 15:46:31,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:46:31,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 15:46:31,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:46:31,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 15:46:31,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:46:31,930 INFO L87 Difference]: Start difference. First operand 234 states and 308 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:46:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:34,684 INFO L93 Difference]: Finished difference Result 282 states and 380 transitions. [2024-11-13 15:46:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:46:34,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2024-11-13 15:46:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:34,686 INFO L225 Difference]: With dead ends: 282 [2024-11-13 15:46:34,686 INFO L226 Difference]: Without dead ends: 255 [2024-11-13 15:46:34,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:46:34,688 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 30 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:34,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 878 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-13 15:46:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-13 15:46:34,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 216. [2024-11-13 15:46:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 158 states have (on average 1.1518987341772151) internal successors, (182), 169 states have internal predecessors, (182), 33 states have call successors, (33), 14 states have call predecessors, (33), 24 states have return successors, (69), 32 states have call predecessors, (69), 31 states have call successors, (69) [2024-11-13 15:46:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 284 transitions. [2024-11-13 15:46:34,731 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 284 transitions. Word has length 51 [2024-11-13 15:46:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:34,731 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 284 transitions. [2024-11-13 15:46:34,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-13 15:46:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 284 transitions. [2024-11-13 15:46:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 15:46:34,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:34,733 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] [2024-11-13 15:46:34,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-13 15:46:34,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:34,933 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:34,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:34,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2134046353, now seen corresponding path program 1 times [2024-11-13 15:46:34,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:46:34,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530257172] [2024-11-13 15:46:34,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:34,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:34,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:34,937 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:34,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 15:46:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:35,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 15:46:35,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:46:35,945 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:46:35,945 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:46:35,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530257172] [2024-11-13 15:46:35,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530257172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:46:35,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:46:35,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-13 15:46:35,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620505861] [2024-11-13 15:46:35,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:46:35,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 15:46:35,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:46:35,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 15:46:35,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-13 15:46:35,947 INFO L87 Difference]: Start difference. First operand 216 states and 284 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:46:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:37,473 INFO L93 Difference]: Finished difference Result 283 states and 363 transitions. [2024-11-13 15:46:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:46:37,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-11-13 15:46:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:37,475 INFO L225 Difference]: With dead ends: 283 [2024-11-13 15:46:37,475 INFO L226 Difference]: Without dead ends: 223 [2024-11-13 15:46:37,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:46:37,476 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 34 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:37,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 633 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 15:46:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-13 15:46:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 211. [2024-11-13 15:46:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 155 states have (on average 1.1483870967741936) internal successors, (178), 165 states have internal predecessors, (178), 32 states have call successors, (32), 14 states have call predecessors, (32), 23 states have return successors, (67), 31 states have call predecessors, (67), 30 states have call successors, (67) [2024-11-13 15:46:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 277 transitions. [2024-11-13 15:46:37,513 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 277 transitions. Word has length 51 [2024-11-13 15:46:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:37,513 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 277 transitions. [2024-11-13 15:46:37,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:46:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 277 transitions. [2024-11-13 15:46:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 15:46:37,514 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:37,514 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, 1] [2024-11-13 15:46:37,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 15:46:37,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:37,715 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:37,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:37,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1466593702, now seen corresponding path program 1 times [2024-11-13 15:46:37,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:46:37,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539017179] [2024-11-13 15:46:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:37,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:37,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:37,718 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:37,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 15:46:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:37,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 15:46:37,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 15:46:39,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:46:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:46:40,703 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:46:40,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539017179] [2024-11-13 15:46:40,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539017179] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 15:46:40,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:46:40,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 16 [2024-11-13 15:46:40,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925452358] [2024-11-13 15:46:40,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:46:40,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:46:40,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:46:40,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:46:40,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:46:40,704 INFO L87 Difference]: Start difference. First operand 211 states and 277 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 15:46:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:41,526 INFO L93 Difference]: Finished difference Result 284 states and 364 transitions. [2024-11-13 15:46:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:46:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2024-11-13 15:46:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:41,529 INFO L225 Difference]: With dead ends: 284 [2024-11-13 15:46:41,529 INFO L226 Difference]: Without dead ends: 245 [2024-11-13 15:46:41,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-13 15:46:41,530 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 21 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:41,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 450 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 15:46:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-13 15:46:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 237. [2024-11-13 15:46:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 173 states have (on average 1.1560693641618498) internal successors, (200), 186 states have internal predecessors, (200), 37 states have call successors, (37), 15 states have call predecessors, (37), 26 states have return successors, (68), 35 states have call predecessors, (68), 34 states have call successors, (68) [2024-11-13 15:46:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 305 transitions. [2024-11-13 15:46:41,587 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 305 transitions. Word has length 55 [2024-11-13 15:46:41,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:41,587 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 305 transitions. [2024-11-13 15:46:41,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 15:46:41,588 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 305 transitions. [2024-11-13 15:46:41,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 15:46:41,589 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:41,589 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, 1] [2024-11-13 15:46:41,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-13 15:46:41,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:41,789 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:41,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:41,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2076481310, now seen corresponding path program 1 times [2024-11-13 15:46:41,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:46:41,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764605959] [2024-11-13 15:46:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:41,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:41,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:41,792 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:41,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 15:46:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:41,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 15:46:41,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:46:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 15:46:42,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:46:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 15:46:42,957 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:46:42,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764605959] [2024-11-13 15:46:42,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764605959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:46:42,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:46:42,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-13 15:46:42,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160986511] [2024-11-13 15:46:42,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:46:42,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:46:42,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:46:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:46:42,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:46:42,959 INFO L87 Difference]: Start difference. First operand 237 states and 305 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:46:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:46:43,469 INFO L93 Difference]: Finished difference Result 307 states and 382 transitions. [2024-11-13 15:46:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:46:43,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2024-11-13 15:46:43,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:46:43,471 INFO L225 Difference]: With dead ends: 307 [2024-11-13 15:46:43,471 INFO L226 Difference]: Without dead ends: 215 [2024-11-13 15:46:43,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:46:43,477 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 6 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:46:43,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 447 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 15:46:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-13 15:46:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2024-11-13 15:46:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 158 states have (on average 1.1645569620253164) internal successors, (184), 171 states have internal predecessors, (184), 32 states have call successors, (32), 13 states have call predecessors, (32), 24 states have return successors, (63), 30 states have call predecessors, (63), 31 states have call successors, (63) [2024-11-13 15:46:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 279 transitions. [2024-11-13 15:46:43,522 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 279 transitions. Word has length 55 [2024-11-13 15:46:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:46:43,523 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 279 transitions. [2024-11-13 15:46:43,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 6 states have internal predecessors, (41), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:46:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 279 transitions. [2024-11-13 15:46:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 15:46:43,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:46:43,524 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-13 15:46:43,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 15:46:43,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:43,725 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:46:43,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:46:43,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1872554445, now seen corresponding path program 1 times [2024-11-13 15:46:43,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:46:43,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893394909] [2024-11-13 15:46:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:46:43,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:46:43,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:46:43,727 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:46:43,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 15:46:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:46:43,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:46:43,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:47:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:47:01,307 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:47:06,999 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:47:06,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893394909] [2024-11-13 15:47:06,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893394909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:47:06,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2138556488] [2024-11-13 15:47:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:47:06,999 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:47:07,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:47:07,001 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:47:07,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2024-11-13 15:47:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:47:07,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:47:07,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:47:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:47:16,461 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:47:16,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2138556488] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:47:16,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:47:16,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 12 [2024-11-13 15:47:16,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104730016] [2024-11-13 15:47:16,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:47:16,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:47:16,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:47:16,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:47:16,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=236, Unknown=5, NotChecked=0, Total=306 [2024-11-13 15:47:16,462 INFO L87 Difference]: Start difference. First operand 215 states and 279 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:47:20,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:47:24,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:47:28,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:47:32,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:47:36,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:47:40,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:47:45,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:47:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:47:46,376 INFO L93 Difference]: Finished difference Result 238 states and 307 transitions. [2024-11-13 15:47:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:47:46,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-11-13 15:47:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:47:46,382 INFO L225 Difference]: With dead ends: 238 [2024-11-13 15:47:46,382 INFO L226 Difference]: Without dead ends: 234 [2024-11-13 15:47:46,383 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=72, Invalid=265, Unknown=5, NotChecked=0, Total=342 [2024-11-13 15:47:46,384 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 8 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:47:46,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 360 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 7 Unknown, 0 Unchecked, 29.7s Time] [2024-11-13 15:47:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-13 15:47:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 217. [2024-11-13 15:47:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 160 states have (on average 1.15625) internal successors, (185), 172 states have internal predecessors, (185), 32 states have call successors, (32), 14 states have call predecessors, (32), 24 states have return successors, (63), 30 states have call predecessors, (63), 31 states have call successors, (63) [2024-11-13 15:47:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 280 transitions. [2024-11-13 15:47:46,427 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 280 transitions. Word has length 51 [2024-11-13 15:47:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:47:46,428 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 280 transitions. [2024-11-13 15:47:46,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:47:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 280 transitions. [2024-11-13 15:47:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 15:47:46,429 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:47:46,429 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:47:46,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 15:47:46,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2024-11-13 15:47:46,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 15:47:46,831 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:47:46,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:47:46,831 INFO L85 PathProgramCache]: Analyzing trace with hash -713952100, now seen corresponding path program 1 times [2024-11-13 15:47:46,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:47:46,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989716858] [2024-11-13 15:47:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:47:46,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:47:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:47:46,834 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:47:46,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 15:47:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:47:46,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:47:46,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:47:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:47:47,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:47:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:47:48,812 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:47:48,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989716858] [2024-11-13 15:47:48,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989716858] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:47:48,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:47:48,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-13 15:47:48,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526002343] [2024-11-13 15:47:48,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:47:48,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:47:48,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:47:48,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:47:48,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:47:48,814 INFO L87 Difference]: Start difference. First operand 217 states and 280 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:47:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:47:50,601 INFO L93 Difference]: Finished difference Result 257 states and 347 transitions. [2024-11-13 15:47:50,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:47:50,602 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2024-11-13 15:47:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:47:50,604 INFO L225 Difference]: With dead ends: 257 [2024-11-13 15:47:50,604 INFO L226 Difference]: Without dead ends: 239 [2024-11-13 15:47:50,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:47:50,605 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 66 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:47:50,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 400 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 15:47:50,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-13 15:47:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 220. [2024-11-13 15:47:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 162 states have (on average 1.1481481481481481) internal successors, (186), 175 states have internal predecessors, (186), 32 states have call successors, (32), 14 states have call predecessors, (32), 25 states have return successors, (67), 30 states have call predecessors, (67), 31 states have call successors, (67) [2024-11-13 15:47:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 285 transitions. [2024-11-13 15:47:50,659 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 285 transitions. Word has length 55 [2024-11-13 15:47:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:47:50,660 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 285 transitions. [2024-11-13 15:47:50,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-13 15:47:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 285 transitions. [2024-11-13 15:47:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-13 15:47:50,661 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:47:50,661 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:47:50,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-13 15:47:50,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:47:50,862 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:47:50,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:47:50,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1074147454, now seen corresponding path program 1 times [2024-11-13 15:47:50,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:47:50,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013724425] [2024-11-13 15:47:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:47:50,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:47:50,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:47:50,864 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:47:50,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-13 15:47:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:47:50,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:47:50,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:47:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:47:52,457 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:47:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 15:47:55,201 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:47:55,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013724425] [2024-11-13 15:47:55,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013724425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:47:55,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:47:55,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-13 15:47:55,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499750329] [2024-11-13 15:47:55,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:47:55,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 15:47:55,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:47:55,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 15:47:55,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:47:55,203 INFO L87 Difference]: Start difference. First operand 220 states and 285 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-13 15:47:57,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:47:57,323 INFO L93 Difference]: Finished difference Result 260 states and 345 transitions. [2024-11-13 15:47:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:47:57,324 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 64 [2024-11-13 15:47:57,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:47:57,325 INFO L225 Difference]: With dead ends: 260 [2024-11-13 15:47:57,325 INFO L226 Difference]: Without dead ends: 251 [2024-11-13 15:47:57,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-13 15:47:57,326 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 18 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:47:57,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 966 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 15:47:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-13 15:47:57,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 236. [2024-11-13 15:47:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 172 states have (on average 1.1511627906976745) internal successors, (198), 189 states have internal predecessors, (198), 35 states have call successors, (35), 14 states have call predecessors, (35), 28 states have return successors, (86), 32 states have call predecessors, (86), 34 states have call successors, (86) [2024-11-13 15:47:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 319 transitions. [2024-11-13 15:47:57,384 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 319 transitions. Word has length 64 [2024-11-13 15:47:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:47:57,384 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 319 transitions. [2024-11-13 15:47:57,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-13 15:47:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 319 transitions. [2024-11-13 15:47:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-13 15:47:57,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:47:57,386 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:47:57,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-13 15:47:57,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:47:57,587 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:47:57,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:47:57,587 INFO L85 PathProgramCache]: Analyzing trace with hash 288727349, now seen corresponding path program 1 times [2024-11-13 15:47:57,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:47:57,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632628209] [2024-11-13 15:47:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:47:57,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:47:57,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:47:57,589 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:47:57,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-13 15:47:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:47:57,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:47:57,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:47:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:47:58,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:47:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:47:59,970 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:47:59,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632628209] [2024-11-13 15:47:59,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632628209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:47:59,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:47:59,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-13 15:47:59,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340673315] [2024-11-13 15:47:59,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:47:59,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:47:59,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:47:59,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:47:59,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:47:59,972 INFO L87 Difference]: Start difference. First operand 236 states and 319 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:48:01,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:48:01,624 INFO L93 Difference]: Finished difference Result 254 states and 342 transitions. [2024-11-13 15:48:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:48:01,624 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2024-11-13 15:48:01,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:48:01,626 INFO L225 Difference]: With dead ends: 254 [2024-11-13 15:48:01,626 INFO L226 Difference]: Without dead ends: 236 [2024-11-13 15:48:01,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:48:01,627 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 31 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:48:01,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 531 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 15:48:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-13 15:48:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 220. [2024-11-13 15:48:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 162 states have (on average 1.1419753086419753) internal successors, (185), 175 states have internal predecessors, (185), 32 states have call successors, (32), 14 states have call predecessors, (32), 25 states have return successors, (66), 30 states have call predecessors, (66), 31 states have call successors, (66) [2024-11-13 15:48:01,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 283 transitions. [2024-11-13 15:48:01,672 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 283 transitions. Word has length 64 [2024-11-13 15:48:01,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:48:01,672 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 283 transitions. [2024-11-13 15:48:01,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:48:01,672 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 283 transitions. [2024-11-13 15:48:01,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-13 15:48:01,674 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:48:01,674 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:48:01,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-13 15:48:01,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:48:01,874 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:48:01,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:48:01,875 INFO L85 PathProgramCache]: Analyzing trace with hash 283523188, now seen corresponding path program 1 times [2024-11-13 15:48:01,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:48:01,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271431823] [2024-11-13 15:48:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:48:01,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:48:01,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:48:01,877 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:48:01,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-13 15:48:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:48:01,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 15:48:01,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:48:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:48:03,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:48:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 15:48:06,829 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:48:06,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271431823] [2024-11-13 15:48:06,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271431823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:48:06,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:48:06,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-13 15:48:06,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460072176] [2024-11-13 15:48:06,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:48:06,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 15:48:06,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:48:06,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 15:48:06,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2024-11-13 15:48:06,831 INFO L87 Difference]: Start difference. First operand 220 states and 283 transitions. Second operand has 20 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 15:48:15,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:48:15,076 INFO L93 Difference]: Finished difference Result 257 states and 337 transitions. [2024-11-13 15:48:15,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 15:48:15,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 64 [2024-11-13 15:48:15,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:48:15,079 INFO L225 Difference]: With dead ends: 257 [2024-11-13 15:48:15,079 INFO L226 Difference]: Without dead ends: 248 [2024-11-13 15:48:15,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 15:48:15,080 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 134 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:48:15,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 888 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-13 15:48:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-13 15:48:15,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 220. [2024-11-13 15:48:15,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 162 states have (on average 1.1419753086419753) internal successors, (185), 175 states have internal predecessors, (185), 32 states have call successors, (32), 14 states have call predecessors, (32), 25 states have return successors, (65), 30 states have call predecessors, (65), 31 states have call successors, (65) [2024-11-13 15:48:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 282 transitions. [2024-11-13 15:48:15,143 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 282 transitions. Word has length 64 [2024-11-13 15:48:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:48:15,143 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 282 transitions. [2024-11-13 15:48:15,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 15:48:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 282 transitions. [2024-11-13 15:48:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 15:48:15,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:48:15,145 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:48:15,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-13 15:48:15,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:48:15,346 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:48:15,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:48:15,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2005836431, now seen corresponding path program 1 times [2024-11-13 15:48:15,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:48:15,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681979943] [2024-11-13 15:48:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:48:15,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:48:15,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:48:15,349 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:48:15,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-13 15:48:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:48:15,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:48:15,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:48:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:48:16,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:48:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:48:17,691 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:48:17,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681979943] [2024-11-13 15:48:17,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681979943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:48:17,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:48:17,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-13 15:48:17,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817785877] [2024-11-13 15:48:17,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:48:17,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:48:17,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:48:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:48:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:48:17,693 INFO L87 Difference]: Start difference. First operand 220 states and 282 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:48:19,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:48:19,073 INFO L93 Difference]: Finished difference Result 247 states and 325 transitions. [2024-11-13 15:48:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:48:19,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2024-11-13 15:48:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:48:19,075 INFO L225 Difference]: With dead ends: 247 [2024-11-13 15:48:19,075 INFO L226 Difference]: Without dead ends: 233 [2024-11-13 15:48:19,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:48:19,076 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 45 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:48:19,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 345 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 15:48:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-11-13 15:48:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2024-11-13 15:48:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 160 states have (on average 1.1375) internal successors, (182), 172 states have internal predecessors, (182), 32 states have call successors, (32), 14 states have call predecessors, (32), 24 states have return successors, (62), 30 states have call predecessors, (62), 31 states have call successors, (62) [2024-11-13 15:48:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 276 transitions. [2024-11-13 15:48:19,119 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 276 transitions. Word has length 66 [2024-11-13 15:48:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:48:19,119 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 276 transitions. [2024-11-13 15:48:19,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:48:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 276 transitions. [2024-11-13 15:48:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 15:48:19,120 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:48:19,120 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:48:19,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-13 15:48:19,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:48:19,321 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:48:19,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:48:19,321 INFO L85 PathProgramCache]: Analyzing trace with hash 568679853, now seen corresponding path program 2 times [2024-11-13 15:48:19,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:48:19,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45565740] [2024-11-13 15:48:19,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:48:19,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:48:19,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:48:19,324 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:48:19,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-13 15:48:19,389 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:48:19,390 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:48:19,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:48:19,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:48:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:48:20,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:48:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:48:21,735 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:48:21,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45565740] [2024-11-13 15:48:21,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45565740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:48:21,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:48:21,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-13 15:48:21,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389054074] [2024-11-13 15:48:21,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:48:21,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:48:21,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:48:21,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:48:21,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:48:21,736 INFO L87 Difference]: Start difference. First operand 217 states and 276 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:48:23,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:48:23,113 INFO L93 Difference]: Finished difference Result 244 states and 319 transitions. [2024-11-13 15:48:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:48:23,114 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2024-11-13 15:48:23,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:48:23,116 INFO L225 Difference]: With dead ends: 244 [2024-11-13 15:48:23,116 INFO L226 Difference]: Without dead ends: 227 [2024-11-13 15:48:23,116 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:48:23,117 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 36 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:48:23,117 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 563 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 15:48:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-11-13 15:48:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 206. [2024-11-13 15:48:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 153 states have (on average 1.130718954248366) internal successors, (173), 162 states have internal predecessors, (173), 31 states have call successors, (31), 14 states have call predecessors, (31), 21 states have return successors, (56), 29 states have call predecessors, (56), 30 states have call successors, (56) [2024-11-13 15:48:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 260 transitions. [2024-11-13 15:48:23,164 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 260 transitions. Word has length 66 [2024-11-13 15:48:23,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:48:23,164 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 260 transitions. [2024-11-13 15:48:23,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:48:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 260 transitions. [2024-11-13 15:48:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 15:48:23,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:48:23,166 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:48:23,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-13 15:48:23,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:48:23,366 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:48:23,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:48:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1824624870, now seen corresponding path program 1 times [2024-11-13 15:48:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:48:23,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582613664] [2024-11-13 15:48:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:48:23,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:48:23,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:48:23,369 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:48:23,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-13 15:48:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:48:23,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:48:23,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:48:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 15:48:25,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:48:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-13 15:48:27,496 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:48:27,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582613664] [2024-11-13 15:48:27,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582613664] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:48:27,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:48:27,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2024-11-13 15:48:27,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337362512] [2024-11-13 15:48:27,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:48:27,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 15:48:27,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:48:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 15:48:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:48:27,498 INFO L87 Difference]: Start difference. First operand 206 states and 260 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 14 states have internal predecessors, (57), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-13 15:48:30,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:48:30,408 INFO L93 Difference]: Finished difference Result 229 states and 283 transitions. [2024-11-13 15:48:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:48:30,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 14 states have internal predecessors, (57), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 73 [2024-11-13 15:48:30,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:48:30,411 INFO L225 Difference]: With dead ends: 229 [2024-11-13 15:48:30,411 INFO L226 Difference]: Without dead ends: 217 [2024-11-13 15:48:30,411 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-11-13 15:48:30,412 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 18 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:48:30,412 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 718 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-13 15:48:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-13 15:48:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 201. [2024-11-13 15:48:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 150 states have (on average 1.1266666666666667) internal successors, (169), 158 states have internal predecessors, (169), 30 states have call successors, (30), 14 states have call predecessors, (30), 20 states have return successors, (49), 28 states have call predecessors, (49), 29 states have call successors, (49) [2024-11-13 15:48:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 248 transitions. [2024-11-13 15:48:30,464 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 248 transitions. Word has length 73 [2024-11-13 15:48:30,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:48:30,465 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 248 transitions. [2024-11-13 15:48:30,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 14 states have internal predecessors, (57), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-13 15:48:30,465 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 248 transitions. [2024-11-13 15:48:30,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 15:48:30,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:48:30,467 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:48:30,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-13 15:48:30,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:48:30,667 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:48:30,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:48:30,667 INFO L85 PathProgramCache]: Analyzing trace with hash -922316438, now seen corresponding path program 1 times [2024-11-13 15:48:30,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:48:30,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217914034] [2024-11-13 15:48:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:48:30,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:48:30,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:48:30,669 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:48:30,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-13 15:48:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:48:30,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-13 15:48:30,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:48:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 15:48:34,031 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:48:34,031 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:48:34,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217914034] [2024-11-13 15:48:34,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217914034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:48:34,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:48:34,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-13 15:48:34,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176358234] [2024-11-13 15:48:34,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:48:34,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 15:48:34,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:48:34,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 15:48:34,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:48:34,033 INFO L87 Difference]: Start difference. First operand 201 states and 248 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:48:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:48:35,794 INFO L93 Difference]: Finished difference Result 217 states and 264 transitions. [2024-11-13 15:48:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:48:35,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2024-11-13 15:48:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:48:35,796 INFO L225 Difference]: With dead ends: 217 [2024-11-13 15:48:35,796 INFO L226 Difference]: Without dead ends: 208 [2024-11-13 15:48:35,797 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-13 15:48:35,797 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 6 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:48:35,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 582 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 15:48:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-13 15:48:35,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2024-11-13 15:48:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 150 states have (on average 1.1266666666666667) internal successors, (169), 158 states have internal predecessors, (169), 30 states have call successors, (30), 14 states have call predecessors, (30), 20 states have return successors, (48), 28 states have call predecessors, (48), 29 states have call successors, (48) [2024-11-13 15:48:35,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 247 transitions. [2024-11-13 15:48:35,835 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 247 transitions. Word has length 73 [2024-11-13 15:48:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:48:35,836 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 247 transitions. [2024-11-13 15:48:35,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:48:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 247 transitions. [2024-11-13 15:48:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 15:48:35,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:48:35,837 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:48:35,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-13 15:48:36,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:48:36,039 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:48:36,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:48:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash -847587041, now seen corresponding path program 1 times [2024-11-13 15:48:36,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:48:36,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873028874] [2024-11-13 15:48:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:48:36,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:48:36,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:48:36,043 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:48:36,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-13 15:48:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:48:36,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 15:48:36,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:48:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:48:41,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:48:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:48:49,710 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:48:49,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873028874] [2024-11-13 15:48:49,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873028874] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:48:49,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:48:49,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-11-13 15:48:49,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099868744] [2024-11-13 15:48:49,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:48:49,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 15:48:49,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:48:49,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 15:48:49,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-11-13 15:48:49,712 INFO L87 Difference]: Start difference. First operand 201 states and 247 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:49:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:49:02,381 INFO L93 Difference]: Finished difference Result 240 states and 300 transitions. [2024-11-13 15:49:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:49:02,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2024-11-13 15:49:02,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:49:02,384 INFO L225 Difference]: With dead ends: 240 [2024-11-13 15:49:02,384 INFO L226 Difference]: Without dead ends: 231 [2024-11-13 15:49:02,384 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 15:49:02,385 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 89 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:49:02,385 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 929 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2024-11-13 15:49:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-13 15:49:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 206. [2024-11-13 15:49:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 154 states have (on average 1.1363636363636365) internal successors, (175), 163 states have internal predecessors, (175), 30 states have call successors, (30), 14 states have call predecessors, (30), 21 states have return successors, (52), 28 states have call predecessors, (52), 29 states have call successors, (52) [2024-11-13 15:49:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 257 transitions. [2024-11-13 15:49:02,448 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 257 transitions. Word has length 73 [2024-11-13 15:49:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:49:02,448 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 257 transitions. [2024-11-13 15:49:02,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:49:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 257 transitions. [2024-11-13 15:49:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 15:49:02,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:49:02,450 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:49:02,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-13 15:49:02,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:49:02,654 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:49:02,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:49:02,654 INFO L85 PathProgramCache]: Analyzing trace with hash -628732323, now seen corresponding path program 1 times [2024-11-13 15:49:02,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:49:02,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38848800] [2024-11-13 15:49:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:49:02,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:49:02,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:49:02,656 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:49:02,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-13 15:49:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:49:02,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 15:49:02,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:49:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:49:06,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:49:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:49:15,676 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:49:15,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38848800] [2024-11-13 15:49:15,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38848800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:49:15,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:49:15,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-13 15:49:15,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171092280] [2024-11-13 15:49:15,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:49:15,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 15:49:15,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:49:15,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 15:49:15,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-13 15:49:15,678 INFO L87 Difference]: Start difference. First operand 206 states and 257 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:49:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:49:32,416 INFO L93 Difference]: Finished difference Result 305 states and 390 transitions. [2024-11-13 15:49:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 15:49:32,417 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2024-11-13 15:49:32,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:49:32,420 INFO L225 Difference]: With dead ends: 305 [2024-11-13 15:49:32,420 INFO L226 Difference]: Without dead ends: 285 [2024-11-13 15:49:32,421 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=342, Invalid=2108, Unknown=0, NotChecked=0, Total=2450 [2024-11-13 15:49:32,421 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 62 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-11-13 15:49:32,422 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1024 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2024-11-13 15:49:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2024-11-13 15:49:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 250. [2024-11-13 15:49:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 187 states have (on average 1.1443850267379678) internal successors, (214), 198 states have internal predecessors, (214), 38 states have call successors, (38), 16 states have call predecessors, (38), 24 states have return successors, (70), 35 states have call predecessors, (70), 37 states have call successors, (70) [2024-11-13 15:49:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 322 transitions. [2024-11-13 15:49:32,504 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 322 transitions. Word has length 73 [2024-11-13 15:49:32,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:49:32,504 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 322 transitions. [2024-11-13 15:49:32,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:49:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 322 transitions. [2024-11-13 15:49:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 15:49:32,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:49:32,505 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:49:32,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-13 15:49:32,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:49:32,710 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:49:32,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:49:32,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1602013089, now seen corresponding path program 2 times [2024-11-13 15:49:32,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:49:32,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479835364] [2024-11-13 15:49:32,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:49:32,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:49:32,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:49:32,712 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:49:32,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-13 15:49:32,801 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:49:32,801 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:49:32,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 15:49:32,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:49:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:49:36,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:49:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:49:45,599 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:49:45,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479835364] [2024-11-13 15:49:45,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479835364] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:49:45,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:49:45,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-13 15:49:45,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322925236] [2024-11-13 15:49:45,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:49:45,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 15:49:45,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:49:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 15:49:45,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2024-11-13 15:49:45,602 INFO L87 Difference]: Start difference. First operand 250 states and 322 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:49:58,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:49:58,951 INFO L93 Difference]: Finished difference Result 356 states and 460 transitions. [2024-11-13 15:49:58,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-13 15:49:58,952 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2024-11-13 15:49:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:49:58,955 INFO L225 Difference]: With dead ends: 356 [2024-11-13 15:49:58,955 INFO L226 Difference]: Without dead ends: 336 [2024-11-13 15:49:58,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 15:49:58,957 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 80 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:49:58,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 900 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2024-11-13 15:49:58,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-11-13 15:49:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 299. [2024-11-13 15:49:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 224 states have (on average 1.15625) internal successors, (259), 237 states have internal predecessors, (259), 47 states have call successors, (47), 18 states have call predecessors, (47), 27 states have return successors, (88), 43 states have call predecessors, (88), 46 states have call successors, (88) [2024-11-13 15:49:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 394 transitions. [2024-11-13 15:49:59,073 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 394 transitions. Word has length 73 [2024-11-13 15:49:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:49:59,074 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 394 transitions. [2024-11-13 15:49:59,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:49:59,074 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 394 transitions. [2024-11-13 15:49:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-13 15:49:59,075 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:49:59,076 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:49:59,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-13 15:49:59,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:49:59,276 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:49:59,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:49:59,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1251817905, now seen corresponding path program 1 times [2024-11-13 15:49:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:49:59,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712374587] [2024-11-13 15:49:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:49:59,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:49:59,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:49:59,279 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:49:59,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-13 15:49:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:49:59,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 15:49:59,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:50:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:50:03,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:50:05,224 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:50:05,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712374587] [2024-11-13 15:50:05,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712374587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:50:05,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [729036545] [2024-11-13 15:50:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:50:05,225 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:50:05,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:50:05,228 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:50:05,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2024-11-13 15:50:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:50:05,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 15:50:05,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:50:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-13 15:50:07,014 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:50:07,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [729036545] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:50:07,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:50:07,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2024-11-13 15:50:07,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461584447] [2024-11-13 15:50:07,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:50:07,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:50:07,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:50:07,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:50:07,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:50:07,015 INFO L87 Difference]: Start difference. First operand 299 states and 394 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:50:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:50:07,382 INFO L93 Difference]: Finished difference Result 349 states and 472 transitions. [2024-11-13 15:50:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:50:07,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2024-11-13 15:50:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:50:07,385 INFO L225 Difference]: With dead ends: 349 [2024-11-13 15:50:07,385 INFO L226 Difference]: Without dead ends: 320 [2024-11-13 15:50:07,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:50:07,386 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 9 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:50:07,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 299 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:50:07,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-13 15:50:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 300. [2024-11-13 15:50:07,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 222 states have (on average 1.1441441441441442) internal successors, (254), 237 states have internal predecessors, (254), 49 states have call successors, (49), 18 states have call predecessors, (49), 28 states have return successors, (95), 44 states have call predecessors, (95), 48 states have call successors, (95) [2024-11-13 15:50:07,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 398 transitions. [2024-11-13 15:50:07,454 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 398 transitions. Word has length 75 [2024-11-13 15:50:07,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:50:07,454 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 398 transitions. [2024-11-13 15:50:07,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 15:50:07,454 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 398 transitions. [2024-11-13 15:50:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-13 15:50:07,455 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:50:07,455 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:50:07,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2024-11-13 15:50:07,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-13 15:50:07,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:50:07,856 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:50:07,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:50:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1032963187, now seen corresponding path program 1 times [2024-11-13 15:50:07,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:50:07,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937136684] [2024-11-13 15:50:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:50:07,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:50:07,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:50:07,858 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:50:07,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-13 15:50:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:50:07,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 15:50:07,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:50:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:50:11,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:50:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:50:20,816 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:50:20,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937136684] [2024-11-13 15:50:20,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937136684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:50:20,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:50:20,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-13 15:50:20,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066180958] [2024-11-13 15:50:20,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:50:20,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 15:50:20,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:50:20,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 15:50:20,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-13 15:50:20,818 INFO L87 Difference]: Start difference. First operand 300 states and 398 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:50:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:50:29,101 INFO L93 Difference]: Finished difference Result 349 states and 454 transitions. [2024-11-13 15:50:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 15:50:29,102 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 75 [2024-11-13 15:50:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:50:29,104 INFO L225 Difference]: With dead ends: 349 [2024-11-13 15:50:29,104 INFO L226 Difference]: Without dead ends: 326 [2024-11-13 15:50:29,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 15:50:29,105 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 45 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:50:29,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 842 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-13 15:50:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-13 15:50:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 302. [2024-11-13 15:50:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 224 states have (on average 1.1294642857142858) internal successors, (253), 238 states have internal predecessors, (253), 49 states have call successors, (49), 19 states have call predecessors, (49), 28 states have return successors, (90), 44 states have call predecessors, (90), 48 states have call successors, (90) [2024-11-13 15:50:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 392 transitions. [2024-11-13 15:50:29,204 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 392 transitions. Word has length 75 [2024-11-13 15:50:29,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:50:29,204 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 392 transitions. [2024-11-13 15:50:29,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:50:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 392 transitions. [2024-11-13 15:50:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-13 15:50:29,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:50:29,206 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:50:29,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-13 15:50:29,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:50:29,407 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:50:29,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:50:29,407 INFO L85 PathProgramCache]: Analyzing trace with hash -958233790, now seen corresponding path program 1 times [2024-11-13 15:50:29,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:50:29,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206712434] [2024-11-13 15:50:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:50:29,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:50:29,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:50:29,409 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:50:29,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-13 15:50:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:50:29,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 15:50:29,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:50:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 15:50:29,937 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:50:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 15:50:30,484 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:50:30,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206712434] [2024-11-13 15:50:30,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206712434] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:50:30,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:50:30,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-13 15:50:30,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10148980] [2024-11-13 15:50:30,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:50:30,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:50:30,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:50:30,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:50:30,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:50:30,485 INFO L87 Difference]: Start difference. First operand 302 states and 392 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 15:50:30,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:50:30,828 INFO L93 Difference]: Finished difference Result 315 states and 405 transitions. [2024-11-13 15:50:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:50:30,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 75 [2024-11-13 15:50:30,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:50:30,831 INFO L225 Difference]: With dead ends: 315 [2024-11-13 15:50:30,831 INFO L226 Difference]: Without dead ends: 310 [2024-11-13 15:50:30,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:50:30,832 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 1 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:50:30,832 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 339 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:50:30,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2024-11-13 15:50:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 302. [2024-11-13 15:50:30,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 224 states have (on average 1.1294642857142858) internal successors, (253), 238 states have internal predecessors, (253), 49 states have call successors, (49), 19 states have call predecessors, (49), 28 states have return successors, (90), 44 states have call predecessors, (90), 48 states have call successors, (90) [2024-11-13 15:50:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 392 transitions. [2024-11-13 15:50:30,938 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 392 transitions. Word has length 75 [2024-11-13 15:50:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:50:30,938 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 392 transitions. [2024-11-13 15:50:30,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 15:50:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 392 transitions. [2024-11-13 15:50:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-13 15:50:30,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:50:30,940 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:50:30,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-13 15:50:31,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:50:31,141 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:50:31,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:50:31,141 INFO L85 PathProgramCache]: Analyzing trace with hash -828171183, now seen corresponding path program 2 times [2024-11-13 15:50:31,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:50:31,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138654488] [2024-11-13 15:50:31,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:50:31,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:50:31,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:50:31,143 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:50:31,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-13 15:50:31,225 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:50:31,225 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:50:31,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 15:50:31,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:50:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:50:34,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:50:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-13 15:50:44,239 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:50:44,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138654488] [2024-11-13 15:50:44,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138654488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:50:44,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:50:44,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-13 15:50:44,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435942069] [2024-11-13 15:50:44,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:50:44,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 15:50:44,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:50:44,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 15:50:44,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-11-13 15:50:44,242 INFO L87 Difference]: Start difference. First operand 302 states and 392 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:50:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:50:52,358 INFO L93 Difference]: Finished difference Result 358 states and 455 transitions. [2024-11-13 15:50:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 15:50:52,359 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 75 [2024-11-13 15:50:52,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:50:52,361 INFO L225 Difference]: With dead ends: 358 [2024-11-13 15:50:52,361 INFO L226 Difference]: Without dead ends: 344 [2024-11-13 15:50:52,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 15:50:52,364 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 50 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:50:52,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 756 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-13 15:50:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2024-11-13 15:50:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 310. [2024-11-13 15:50:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 231 states have (on average 1.12987012987013) internal successors, (261), 244 states have internal predecessors, (261), 50 states have call successors, (50), 20 states have call predecessors, (50), 28 states have return successors, (88), 45 states have call predecessors, (88), 49 states have call successors, (88) [2024-11-13 15:50:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 399 transitions. [2024-11-13 15:50:52,480 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 399 transitions. Word has length 75 [2024-11-13 15:50:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:50:52,480 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 399 transitions. [2024-11-13 15:50:52,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-13 15:50:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 399 transitions. [2024-11-13 15:50:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-13 15:50:52,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:50:52,482 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:50:52,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-13 15:50:52,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:50:52,683 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:50:52,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:50:52,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2107925384, now seen corresponding path program 1 times [2024-11-13 15:50:52,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:50:52,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926841402] [2024-11-13 15:50:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:50:52,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:50:52,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:50:52,686 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:50:52,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-13 15:50:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:50:52,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 15:50:52,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:50:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 15:50:53,148 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:50:53,148 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:50:53,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926841402] [2024-11-13 15:50:53,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926841402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:50:53,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:50:53,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 15:50:53,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170434480] [2024-11-13 15:50:53,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:50:53,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:50:53,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:50:53,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:50:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:50:53,150 INFO L87 Difference]: Start difference. First operand 310 states and 399 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 15:50:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:50:53,517 INFO L93 Difference]: Finished difference Result 324 states and 413 transitions. [2024-11-13 15:50:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:50:53,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 77 [2024-11-13 15:50:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:50:53,519 INFO L225 Difference]: With dead ends: 324 [2024-11-13 15:50:53,519 INFO L226 Difference]: Without dead ends: 312 [2024-11-13 15:50:53,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:50:53,520 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:50:53,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 330 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:50:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-11-13 15:50:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 263. [2024-11-13 15:50:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 197 states have (on average 1.131979695431472) internal successors, (223), 206 states have internal predecessors, (223), 41 states have call successors, (41), 18 states have call predecessors, (41), 24 states have return successors, (70), 38 states have call predecessors, (70), 40 states have call successors, (70) [2024-11-13 15:50:53,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 334 transitions. [2024-11-13 15:50:53,584 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 334 transitions. Word has length 77 [2024-11-13 15:50:53,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:50:53,584 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 334 transitions. [2024-11-13 15:50:53,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 15:50:53,584 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 334 transitions. [2024-11-13 15:50:53,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-13 15:50:53,585 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:50:53,585 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:50:53,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-13 15:50:53,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:50:53,785 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:50:53,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:50:53,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1454429620, now seen corresponding path program 1 times [2024-11-13 15:50:53,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:50:53,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972201987] [2024-11-13 15:50:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:50:53,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:50:53,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:50:53,789 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:50:53,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-13 15:50:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:50:53,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 15:50:53,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:50:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 15:50:57,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:51:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:51:04,167 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:51:04,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972201987] [2024-11-13 15:51:04,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972201987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:51:04,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:51:04,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-13 15:51:04,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475573950] [2024-11-13 15:51:04,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:51:04,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 15:51:04,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:51:04,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 15:51:04,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-11-13 15:51:04,168 INFO L87 Difference]: Start difference. First operand 263 states and 334 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-13 15:51:13,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:51:13,789 INFO L93 Difference]: Finished difference Result 331 states and 408 transitions. [2024-11-13 15:51:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 15:51:13,790 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 79 [2024-11-13 15:51:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:51:13,791 INFO L225 Difference]: With dead ends: 331 [2024-11-13 15:51:13,791 INFO L226 Difference]: Without dead ends: 251 [2024-11-13 15:51:13,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 15:51:13,792 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 46 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:51:13,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 835 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2024-11-13 15:51:13,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-11-13 15:51:13,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 222. [2024-11-13 15:51:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 167 states have (on average 1.1017964071856288) internal successors, (184), 173 states have internal predecessors, (184), 34 states have call successors, (34), 16 states have call predecessors, (34), 20 states have return successors, (55), 32 states have call predecessors, (55), 33 states have call successors, (55) [2024-11-13 15:51:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 273 transitions. [2024-11-13 15:51:13,838 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 273 transitions. Word has length 79 [2024-11-13 15:51:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:51:13,838 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 273 transitions. [2024-11-13 15:51:13,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-13 15:51:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 273 transitions. [2024-11-13 15:51:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-13 15:51:13,839 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:51:13,840 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:51:13,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-13 15:51:14,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:51:14,040 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:51:14,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:51:14,041 INFO L85 PathProgramCache]: Analyzing trace with hash -215291294, now seen corresponding path program 1 times [2024-11-13 15:51:14,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:51:14,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023107242] [2024-11-13 15:51:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:14,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:51:14,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:51:14,042 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:51:14,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-13 15:51:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:14,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 15:51:14,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:51:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 15:51:17,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:51:18,476 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:51:18,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023107242] [2024-11-13 15:51:18,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023107242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:51:18,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1965565151] [2024-11-13 15:51:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:18,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:51:18,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:51:18,479 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:51:18,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2024-11-13 15:51:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:18,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 15:51:18,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:51:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:51:20,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:51:21,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1965565151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:51:21,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:51:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2024-11-13 15:51:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592051348] [2024-11-13 15:51:21,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:51:21,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 15:51:21,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:51:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 15:51:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-13 15:51:21,785 INFO L87 Difference]: Start difference. First operand 222 states and 273 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 15:51:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:51:27,306 INFO L93 Difference]: Finished difference Result 249 states and 306 transitions. [2024-11-13 15:51:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 15:51:27,308 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 82 [2024-11-13 15:51:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:51:27,309 INFO L225 Difference]: With dead ends: 249 [2024-11-13 15:51:27,310 INFO L226 Difference]: Without dead ends: 240 [2024-11-13 15:51:27,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-11-13 15:51:27,310 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 27 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:51:27,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 809 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-13 15:51:27,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-13 15:51:27,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 228. [2024-11-13 15:51:27,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 171 states have (on average 1.0994152046783625) internal successors, (188), 177 states have internal predecessors, (188), 35 states have call successors, (35), 16 states have call predecessors, (35), 21 states have return successors, (62), 34 states have call predecessors, (62), 34 states have call successors, (62) [2024-11-13 15:51:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 285 transitions. [2024-11-13 15:51:27,394 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 285 transitions. Word has length 82 [2024-11-13 15:51:27,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:51:27,395 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 285 transitions. [2024-11-13 15:51:27,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-13 15:51:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 285 transitions. [2024-11-13 15:51:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-13 15:51:27,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:51:27,396 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:51:27,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-11-13 15:51:27,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2024-11-13 15:51:27,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 15:51:27,797 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:51:27,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:51:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1170912100, now seen corresponding path program 1 times [2024-11-13 15:51:27,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:51:27,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115990418] [2024-11-13 15:51:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:27,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:51:27,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:51:27,799 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:51:27,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-13 15:51:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:27,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 15:51:27,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:51:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:51:42,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:51:45,420 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:51:45,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115990418] [2024-11-13 15:51:45,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115990418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:51:45,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [834636775] [2024-11-13 15:51:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:45,421 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:51:45,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:51:45,423 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:51:45,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2024-11-13 15:51:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:45,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 15:51:45,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:52:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 15:52:23,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:52:26,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [834636775] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:52:26,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:52:26,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2024-11-13 15:52:26,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820919838] [2024-11-13 15:52:26,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:52:26,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 15:52:26,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:52:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 15:52:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=228, Unknown=8, NotChecked=0, Total=272 [2024-11-13 15:52:26,393 INFO L87 Difference]: Start difference. First operand 228 states and 285 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 15:52:31,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:52:36,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:52:40,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:52:45,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:52:46,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:52:50,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.73s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:52:54,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:52:57,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:53:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:53:03,535 INFO L93 Difference]: Finished difference Result 255 states and 311 transitions. [2024-11-13 15:53:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:53:03,536 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 82 [2024-11-13 15:53:03,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:53:03,537 INFO L225 Difference]: With dead ends: 255 [2024-11-13 15:53:03,537 INFO L226 Difference]: Without dead ends: 246 [2024-11-13 15:53:03,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=41, Invalid=257, Unknown=8, NotChecked=0, Total=306 [2024-11-13 15:53:03,537 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 9 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:53:03,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 863 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 292 Invalid, 5 Unknown, 0 Unchecked, 36.8s Time] [2024-11-13 15:53:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-11-13 15:53:03,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 232. [2024-11-13 15:53:03,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 174 states have (on average 1.0977011494252873) internal successors, (191), 180 states have internal predecessors, (191), 35 states have call successors, (35), 16 states have call predecessors, (35), 22 states have return successors, (62), 35 states have call predecessors, (62), 34 states have call successors, (62) [2024-11-13 15:53:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 288 transitions. [2024-11-13 15:53:03,599 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 288 transitions. Word has length 82 [2024-11-13 15:53:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:53:03,599 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 288 transitions. [2024-11-13 15:53:03,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 15:53:03,599 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 288 transitions. [2024-11-13 15:53:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-13 15:53:03,599 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:53:03,600 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:53:03,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2024-11-13 15:53:03,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-13 15:53:04,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:53:04,000 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:53:04,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:53:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash 51470192, now seen corresponding path program 2 times [2024-11-13 15:53:04,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:53:04,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325970794] [2024-11-13 15:53:04,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:53:04,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:53:04,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:53:04,003 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:53:04,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93236f00-181b-4392-9c9e-59ecfdf65e5c/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-13 15:53:04,098 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:53:04,098 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:53:04,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 15:53:04,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:53:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-13 15:53:07,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:53:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 15:53:14,400 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:53:14,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325970794] [2024-11-13 15:53:14,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325970794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:53:14,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:53:14,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-13 15:53:14,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601291506] [2024-11-13 15:53:14,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:53:14,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 15:53:14,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:53:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 15:53:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-11-13 15:53:14,401 INFO L87 Difference]: Start difference. First operand 232 states and 288 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12)