./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya --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 2719a9efd2165050483c20571c85746fdd7204d074459e12a38b31692a3fffb0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:32:39,598 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:32:39,664 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:32:39,670 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:32:39,670 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:32:39,697 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:32:39,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:32:39,699 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:32:39,699 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:32:39,700 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:32:39,701 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:32:39,701 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:32:39,702 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:32:39,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:32:39,703 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:32:39,703 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:32:39,704 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:32:39,705 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:32:39,705 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:32:39,705 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:32:39,706 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:32:39,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:32:39,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:32:39,708 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:32:39,708 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:32:39,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:32:39,709 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:32:39,709 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:32:39,710 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:32:39,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:32:39,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:32:39,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:32:39,712 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:32:39,712 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:32:39,712 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:32:39,713 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:32:39,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:32:39,713 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:32:39,714 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:32:39,714 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:32:39,714 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:32:39,714 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:32:39,715 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2719a9efd2165050483c20571c85746fdd7204d074459e12a38b31692a3fffb0 [2023-11-29 02:32:39,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:32:40,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:32:40,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:32:40,008 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:32:40,008 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:32:40,010 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2023-11-29 02:32:42,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:32:43,006 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:32:43,007 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2023-11-29 02:32:43,014 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/data/1221f123c/79ea6b5f1cd34624a1caf10f0a4de181/FLAG82af56ddf [2023-11-29 02:32:43,029 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/data/1221f123c/79ea6b5f1cd34624a1caf10f0a4de181 [2023-11-29 02:32:43,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:32:43,033 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:32:43,034 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:32:43,034 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:32:43,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:32:43,041 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c90044 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43, skipping insertion in model container [2023-11-29 02:32:43,042 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,068 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:32:43,206 WARN L240 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_bacf80ee-6800-4310-92ab-82b9a953c648/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i[820,833] [2023-11-29 02:32:43,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:32:43,233 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:32:43,244 WARN L240 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_bacf80ee-6800-4310-92ab-82b9a953c648/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i[820,833] [2023-11-29 02:32:43,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:32:43,270 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:32:43,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43 WrapperNode [2023-11-29 02:32:43,271 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:32:43,272 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:32:43,272 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:32:43,272 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:32:43,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,286 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,305 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-11-29 02:32:43,306 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:32:43,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:32:43,307 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:32:43,307 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:32:43,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,319 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,334 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2023-11-29 02:32:43,334 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,334 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,340 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,344 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,347 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:32:43,351 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:32:43,351 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:32:43,351 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:32:43,352 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (1/1) ... [2023-11-29 02:32:43,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:32:43,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:43,379 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:32:43,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:32:43,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:32:43,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:32:43,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:32:43,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:32:43,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:32:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:32:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:32:43,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:32:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:32:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:32:43,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:32:43,505 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:32:43,508 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:32:43,639 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:32:43,669 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:32:43,669 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 02:32:43,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:32:43 BoogieIcfgContainer [2023-11-29 02:32:43,670 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:32:43,672 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:32:43,672 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:32:43,675 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:32:43,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:32:43" (1/3) ... [2023-11-29 02:32:43,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ca5724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:32:43, skipping insertion in model container [2023-11-29 02:32:43,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:32:43" (2/3) ... [2023-11-29 02:32:43,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ca5724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:32:43, skipping insertion in model container [2023-11-29 02:32:43,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:32:43" (3/3) ... [2023-11-29 02:32:43,679 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2023-11-29 02:32:43,695 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:32:43,696 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:32:43,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:32:43,741 INFO L357 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, mHoare=true, 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;@3b72fc91, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:32:43,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:32:43,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:32:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 02:32:43,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:43,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:43,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:32:43,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1612111142, now seen corresponding path program 1 times [2023-11-29 02:32:43,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:43,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212430918] [2023-11-29 02:32:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:43,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:32:43,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:43,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212430918] [2023-11-29 02:32:43,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212430918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:32:43,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:32:43,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:32:43,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131617962] [2023-11-29 02:32:43,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:32:43,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:32:43,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:43,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:32:43,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:32:43,989 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-11-29 02:32:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:32:44,022 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2023-11-29 02:32:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:32:44,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2023-11-29 02:32:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:32:44,031 INFO L225 Difference]: With dead ends: 35 [2023-11-29 02:32:44,031 INFO L226 Difference]: Without dead ends: 17 [2023-11-29 02:32:44,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:32:44,037 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:32:44,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:32:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-29 02:32:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-29 02:32:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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) [2023-11-29 02:32:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-29 02:32:44,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2023-11-29 02:32:44,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:32:44,067 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-29 02:32:44,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-11-29 02:32:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-29 02:32:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 02:32:44,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:44,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:44,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:32:44,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:32:44,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:44,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1371244853, now seen corresponding path program 1 times [2023-11-29 02:32:44,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:44,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885364080] [2023-11-29 02:32:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:44,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:32:44,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:44,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885364080] [2023-11-29 02:32:44,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885364080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:44,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318309199] [2023-11-29 02:32:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:44,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:44,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:44,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:32:44,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:32:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:44,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:32:44,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:32:44,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:32:44,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318309199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:32:44,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:32:44,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 02:32:44,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457391345] [2023-11-29 02:32:44,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:32:44,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:32:44,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:44,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:32:44,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:32:44,294 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-29 02:32:44,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:32:44,314 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2023-11-29 02:32:44,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:32:44,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2023-11-29 02:32:44,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:32:44,316 INFO L225 Difference]: With dead ends: 30 [2023-11-29 02:32:44,316 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 02:32:44,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:32:44,318 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:32:44,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:32:44,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 02:32:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-29 02:32:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:32:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2023-11-29 02:32:44,324 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 10 [2023-11-29 02:32:44,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:32:44,325 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2023-11-29 02:32:44,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-29 02:32:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2023-11-29 02:32:44,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 02:32:44,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:44,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:44,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:32:44,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:44,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:32:44,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:44,534 INFO L85 PathProgramCache]: Analyzing trace with hash 810154115, now seen corresponding path program 1 times [2023-11-29 02:32:44,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:44,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190238558] [2023-11-29 02:32:44,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:44,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:32:44,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:44,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190238558] [2023-11-29 02:32:44,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190238558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:44,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92940899] [2023-11-29 02:32:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:44,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:44,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:44,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:32:44,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:32:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:44,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:32:44,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:32:44,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:32:44,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92940899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:32:44,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:32:44,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 02:32:44,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45107653] [2023-11-29 02:32:44,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:32:44,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:32:44,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:44,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:32:44,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:32:44,692 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-11-29 02:32:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:32:44,718 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2023-11-29 02:32:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:32:44,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2023-11-29 02:32:44,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:32:44,720 INFO L225 Difference]: With dead ends: 44 [2023-11-29 02:32:44,720 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 02:32:44,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:32:44,722 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:32:44,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:32:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 02:32:44,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-29 02:32:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 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) [2023-11-29 02:32:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-11-29 02:32:44,729 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 13 [2023-11-29 02:32:44,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:32:44,730 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-11-29 02:32:44,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-11-29 02:32:44,730 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-11-29 02:32:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 02:32:44,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:44,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:44,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:32:44,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:44,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:32:44,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1552667997, now seen corresponding path program 1 times [2023-11-29 02:32:44,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:44,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504748776] [2023-11-29 02:32:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:44,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:32:45,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:45,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504748776] [2023-11-29 02:32:45,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504748776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:45,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753362220] [2023-11-29 02:32:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:45,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:45,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:45,006 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:32:45,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:32:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:45,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 02:32:45,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:32:45,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:32:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:32:45,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753362220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:32:45,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:32:45,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 02:32:45,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536240892] [2023-11-29 02:32:45,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:32:45,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:32:45,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:45,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:32:45,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:32:45,128 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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) [2023-11-29 02:32:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:32:45,155 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2023-11-29 02:32:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:32:45,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 16 [2023-11-29 02:32:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:32:45,157 INFO L225 Difference]: With dead ends: 46 [2023-11-29 02:32:45,157 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 02:32:45,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:32:45,159 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:32:45,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:32:45,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 02:32:45,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 02:32:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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) [2023-11-29 02:32:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-29 02:32:45,166 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2023-11-29 02:32:45,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:32:45,167 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-29 02:32:45,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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) [2023-11-29 02:32:45,167 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-29 02:32:45,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 02:32:45,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:45,168 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:45,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:32:45,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:45,369 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:32:45,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash -190909954, now seen corresponding path program 2 times [2023-11-29 02:32:45,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:45,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457014817] [2023-11-29 02:32:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:45,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 02:32:45,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:45,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457014817] [2023-11-29 02:32:45,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457014817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:45,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150527212] [2023-11-29 02:32:45,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:32:45,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:45,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:45,445 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:32:45,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:32:45,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:32:45,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:32:45,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:32:45,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:32:45,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:32:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:32:45,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150527212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:32:45,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:32:45,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-11-29 02:32:45,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111620983] [2023-11-29 02:32:45,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:32:45,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:32:45,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:45,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:32:45,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:32:45,651 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2023-11-29 02:32:45,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:32:45,711 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2023-11-29 02:32:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:32:45,712 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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 19 [2023-11-29 02:32:45,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:32:45,712 INFO L225 Difference]: With dead ends: 61 [2023-11-29 02:32:45,713 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 02:32:45,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:32:45,714 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:32:45,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 80 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:32:45,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 02:32:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2023-11-29 02:32:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 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) [2023-11-29 02:32:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-11-29 02:32:45,722 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 19 [2023-11-29 02:32:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:32:45,722 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-11-29 02:32:45,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 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) [2023-11-29 02:32:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-11-29 02:32:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 02:32:45,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:45,724 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:45,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:32:45,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:45,927 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:32:45,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:45,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1522098536, now seen corresponding path program 3 times [2023-11-29 02:32:45,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:45,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628962113] [2023-11-29 02:32:45,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:45,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:32:46,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:46,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628962113] [2023-11-29 02:32:46,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628962113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:46,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800101584] [2023-11-29 02:32:46,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:32:46,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:46,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:46,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:32:46,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:32:46,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 02:32:46,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:32:46,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:32:46,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:32:46,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:32:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:32:46,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800101584] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:32:46,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:32:46,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-29 02:32:46,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113958765] [2023-11-29 02:32:46,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:32:46,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:32:46,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:46,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:32:46,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:32:46,260 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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) [2023-11-29 02:32:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:32:46,313 INFO L93 Difference]: Finished difference Result 85 states and 116 transitions. [2023-11-29 02:32:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:32:46,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-29 02:32:46,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:32:46,315 INFO L225 Difference]: With dead ends: 85 [2023-11-29 02:32:46,315 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 02:32:46,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:32:46,317 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:32:46,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:32:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 02:32:46,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-29 02:32:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 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) [2023-11-29 02:32:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2023-11-29 02:32:46,327 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 28 [2023-11-29 02:32:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:32:46,328 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2023-11-29 02:32:46,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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) [2023-11-29 02:32:46,328 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2023-11-29 02:32:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 02:32:46,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:46,330 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:46,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 02:32:46,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:32:46,530 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:32:46,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash -302265880, now seen corresponding path program 4 times [2023-11-29 02:32:46,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:46,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297771160] [2023-11-29 02:32:46,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:46,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 02:32:46,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:46,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297771160] [2023-11-29 02:32:46,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297771160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:46,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377683163] [2023-11-29 02:32:46,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:32:46,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:46,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:46,762 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:32:46,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:32:46,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:32:46,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:32:46,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:32:46,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:32:47,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:32:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 02:32:47,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377683163] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:32:47,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:32:47,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 27 [2023-11-29 02:32:47,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56097776] [2023-11-29 02:32:47,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:32:47,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 02:32:47,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:47,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 02:32:47,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:32:47,202 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 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) [2023-11-29 02:32:47,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:32:47,321 INFO L93 Difference]: Finished difference Result 159 states and 223 transitions. [2023-11-29 02:32:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 02:32:47,321 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 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 40 [2023-11-29 02:32:47,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:32:47,323 INFO L225 Difference]: With dead ends: 159 [2023-11-29 02:32:47,323 INFO L226 Difference]: Without dead ends: 110 [2023-11-29 02:32:47,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:32:47,325 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:32:47,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 89 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:32:47,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-29 02:32:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-11-29 02:32:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 109 states have internal predecessors, (142), 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) [2023-11-29 02:32:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2023-11-29 02:32:47,339 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 40 [2023-11-29 02:32:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:32:47,340 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2023-11-29 02:32:47,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 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) [2023-11-29 02:32:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2023-11-29 02:32:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 02:32:47,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:47,343 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:47,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:32:47,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:47,547 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:32:47,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:47,547 INFO L85 PathProgramCache]: Analyzing trace with hash 299109283, now seen corresponding path program 5 times [2023-11-29 02:32:47,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:47,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620986649] [2023-11-29 02:32:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:47,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-29 02:32:47,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:47,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620986649] [2023-11-29 02:32:47,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620986649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:47,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271955747] [2023-11-29 02:32:47,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:32:47,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:47,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:47,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:32:47,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:32:48,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-29 02:32:48,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:32:48,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 02:32:48,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 02:32:48,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:32:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 02:32:48,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271955747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:32:48,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:32:48,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 44 [2023-11-29 02:32:48,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238460842] [2023-11-29 02:32:48,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:32:48,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 02:32:48,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:48,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 02:32:48,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=1306, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 02:32:48,871 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 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) [2023-11-29 02:32:49,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:32:49,139 INFO L93 Difference]: Finished difference Result 304 states and 432 transitions. [2023-11-29 02:32:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 02:32:49,140 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 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 65 [2023-11-29 02:32:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:32:49,143 INFO L225 Difference]: With dead ends: 304 [2023-11-29 02:32:49,143 INFO L226 Difference]: Without dead ends: 207 [2023-11-29 02:32:49,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=586, Invalid=1306, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 02:32:49,146 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:32:49,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 166 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:32:49,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-29 02:32:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2023-11-29 02:32:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3155339805825244) internal successors, (271), 206 states have internal predecessors, (271), 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) [2023-11-29 02:32:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 271 transitions. [2023-11-29 02:32:49,169 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 271 transitions. Word has length 65 [2023-11-29 02:32:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:32:49,169 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 271 transitions. [2023-11-29 02:32:49,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 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) [2023-11-29 02:32:49,170 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 271 transitions. [2023-11-29 02:32:49,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-29 02:32:49,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:49,173 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:49,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:32:49,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:49,379 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:32:49,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:49,379 INFO L85 PathProgramCache]: Analyzing trace with hash -683125688, now seen corresponding path program 6 times [2023-11-29 02:32:49,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:49,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607452661] [2023-11-29 02:32:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:49,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-29 02:32:49,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:49,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607452661] [2023-11-29 02:32:49,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607452661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:49,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932959503] [2023-11-29 02:32:49,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:32:49,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:49,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:49,729 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:32:49,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:32:49,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-29 02:32:49,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:32:49,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:32:49,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-29 02:32:50,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:32:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1414 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-29 02:32:50,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932959503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:32:50,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:32:50,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2023-11-29 02:32:50,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975856939] [2023-11-29 02:32:50,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:32:50,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:32:50,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:50,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:32:50,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:32:50,321 INFO L87 Difference]: Start difference. First operand 207 states and 271 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:32:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:32:50,372 INFO L93 Difference]: Finished difference Result 414 states and 555 transitions. [2023-11-29 02:32:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 02:32:50,372 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-11-29 02:32:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:32:50,374 INFO L225 Difference]: With dead ends: 414 [2023-11-29 02:32:50,374 INFO L226 Difference]: Without dead ends: 221 [2023-11-29 02:32:50,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:32:50,376 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:32:50,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:32:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-11-29 02:32:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-11-29 02:32:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.2954545454545454) internal successors, (285), 220 states have internal predecessors, (285), 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) [2023-11-29 02:32:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 285 transitions. [2023-11-29 02:32:50,393 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 285 transitions. Word has length 114 [2023-11-29 02:32:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:32:50,394 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 285 transitions. [2023-11-29 02:32:50,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:32:50,394 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 285 transitions. [2023-11-29 02:32:50,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-29 02:32:50,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:50,397 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:50,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:32:50,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:50,603 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:32:50,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:50,603 INFO L85 PathProgramCache]: Analyzing trace with hash 544708584, now seen corresponding path program 7 times [2023-11-29 02:32:50,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:50,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096273485] [2023-11-29 02:32:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:50,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-29 02:32:51,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:51,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096273485] [2023-11-29 02:32:51,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096273485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:51,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729823621] [2023-11-29 02:32:51,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:32:51,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:51,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:51,650 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:32:51,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:32:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:51,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 02:32:51,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-29 02:32:51,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:32:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1687 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-29 02:32:52,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729823621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:32:52,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:32:52,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2023-11-29 02:32:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463753707] [2023-11-29 02:32:52,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:32:52,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 02:32:52,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 02:32:52,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 02:32:52,852 INFO L87 Difference]: Start difference. First operand 221 states and 285 transitions. Second operand has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 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) [2023-11-29 02:32:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:32:52,934 INFO L93 Difference]: Finished difference Result 442 states and 597 transitions. [2023-11-29 02:32:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 02:32:52,935 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 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 128 [2023-11-29 02:32:52,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:32:52,937 INFO L225 Difference]: With dead ends: 442 [2023-11-29 02:32:52,937 INFO L226 Difference]: Without dead ends: 249 [2023-11-29 02:32:52,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 02:32:52,940 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:32:52,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 162 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:32:52,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-11-29 02:32:52,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2023-11-29 02:32:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.2620967741935485) internal successors, (313), 248 states have internal predecessors, (313), 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) [2023-11-29 02:32:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 313 transitions. [2023-11-29 02:32:52,954 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 313 transitions. Word has length 128 [2023-11-29 02:32:52,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:32:52,954 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 313 transitions. [2023-11-29 02:32:52,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 56 states have internal predecessors, (71), 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) [2023-11-29 02:32:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 313 transitions. [2023-11-29 02:32:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-29 02:32:52,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:52,957 INFO L195 NwaCegarLoop]: trace histogram [54, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:52,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:32:53,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:32:53,159 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:32:53,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:53,159 INFO L85 PathProgramCache]: Analyzing trace with hash 952342312, now seen corresponding path program 8 times [2023-11-29 02:32:53,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:53,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552796746] [2023-11-29 02:32:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:32:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:32:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-29 02:32:55,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:55,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552796746] [2023-11-29 02:32:55,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552796746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:55,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585856882] [2023-11-29 02:32:55,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:32:55,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:32:55,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:32:55,980 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:32:55,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:32:56,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:32:56,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:32:56,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 02:32:56,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-29 02:32:56,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:32:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2821 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-29 02:32:59,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585856882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:32:59,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:32:59,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 112 [2023-11-29 02:32:59,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224093473] [2023-11-29 02:32:59,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:32:59,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-11-29 02:32:59,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:59,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-11-29 02:32:59,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 02:32:59,505 INFO L87 Difference]: Start difference. First operand 249 states and 313 transitions. Second operand has 113 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 112 states have internal predecessors, (127), 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) [2023-11-29 02:32:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:32:59,695 INFO L93 Difference]: Finished difference Result 498 states and 681 transitions. [2023-11-29 02:32:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-11-29 02:32:59,696 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 112 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2023-11-29 02:32:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:32:59,698 INFO L225 Difference]: With dead ends: 498 [2023-11-29 02:32:59,699 INFO L226 Difference]: Without dead ends: 305 [2023-11-29 02:32:59,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 02:32:59,703 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:32:59,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:32:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-29 02:32:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2023-11-29 02:32:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.2138157894736843) internal successors, (369), 304 states have internal predecessors, (369), 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) [2023-11-29 02:32:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 369 transitions. [2023-11-29 02:32:59,714 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 369 transitions. Word has length 156 [2023-11-29 02:32:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:32:59,715 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 369 transitions. [2023-11-29 02:32:59,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 112 states have internal predecessors, (127), 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) [2023-11-29 02:32:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 369 transitions. [2023-11-29 02:32:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-29 02:32:59,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:32:59,718 INFO L195 NwaCegarLoop]: trace histogram [110, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:32:59,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:32:59,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:32:59,918 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:32:59,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:32:59,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1066830424, now seen corresponding path program 9 times [2023-11-29 02:32:59,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:32:59,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872376989] [2023-11-29 02:32:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:32:59,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7441 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-29 02:33:06,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:06,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872376989] [2023-11-29 02:33:06,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872376989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:06,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616917805] [2023-11-29 02:33:06,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:33:06,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:06,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:06,867 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:06,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:41:30,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2023-11-29 02:41:30,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:41:30,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 02:41:30,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:41:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7441 backedges. 111 proven. 1335 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-29 02:41:32,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:41:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7441 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2023-11-29 02:41:34,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616917805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:41:34,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:41:34,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 34, 33] total 176 [2023-11-29 02:41:34,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361082675] [2023-11-29 02:41:34,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:41:34,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2023-11-29 02:41:34,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:41:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2023-11-29 02:41:34,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8456, Invalid=22344, Unknown=0, NotChecked=0, Total=30800 [2023-11-29 02:41:34,197 INFO L87 Difference]: Start difference. First operand 305 states and 369 transitions. Second operand has 176 states, 176 states have (on average 1.7897727272727273) internal successors, (315), 176 states have internal predecessors, (315), 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) [2023-11-29 02:41:34,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:41:34,901 INFO L93 Difference]: Finished difference Result 691 states and 947 transitions. [2023-11-29 02:41:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2023-11-29 02:41:34,902 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.7897727272727273) internal successors, (315), 176 states have internal predecessors, (315), 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 212 [2023-11-29 02:41:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:41:34,905 INFO L225 Difference]: With dead ends: 691 [2023-11-29 02:41:34,905 INFO L226 Difference]: Without dead ends: 498 [2023-11-29 02:41:34,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6882 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=8456, Invalid=22344, Unknown=0, NotChecked=0, Total=30800 [2023-11-29 02:41:34,909 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 234 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:41:34,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 171 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:41:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2023-11-29 02:41:34,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2023-11-29 02:41:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.2595573440643864) internal successors, (626), 497 states have internal predecessors, (626), 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) [2023-11-29 02:41:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 626 transitions. [2023-11-29 02:41:34,926 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 626 transitions. Word has length 212 [2023-11-29 02:41:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:41:34,926 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 626 transitions. [2023-11-29 02:41:34,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.7897727272727273) internal successors, (315), 176 states have internal predecessors, (315), 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) [2023-11-29 02:41:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 626 transitions. [2023-11-29 02:41:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-29 02:41:34,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:41:34,931 INFO L195 NwaCegarLoop]: trace histogram [111, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:41:34,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 02:41:35,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 02:41:35,135 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:41:35,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:41:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash 160697059, now seen corresponding path program 10 times [2023-11-29 02:41:35,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:41:35,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860344632] [2023-11-29 02:41:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:41:35,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:41:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:41:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11952 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2023-11-29 02:41:42,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:41:42,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860344632] [2023-11-29 02:41:42,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860344632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:41:42,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623218533] [2023-11-29 02:41:42,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:41:42,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:41:42,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:41:42,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:41:42,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:41:43,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:41:43,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:41:43,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 1555 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 02:41:43,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:41:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11952 backedges. 1 proven. 5735 refuted. 0 times theorem prover too weak. 6216 trivial. 0 not checked. [2023-11-29 02:41:46,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:41:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11952 backedges. 1 proven. 5735 refuted. 0 times theorem prover too weak. 6216 trivial. 0 not checked. [2023-11-29 02:41:53,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623218533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:41:53,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:41:53,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 65, 65] total 240 [2023-11-29 02:41:53,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071815466] [2023-11-29 02:41:53,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:41:53,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 240 states [2023-11-29 02:41:53,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:41:53,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2023-11-29 02:41:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14568, Invalid=42792, Unknown=0, NotChecked=0, Total=57360 [2023-11-29 02:41:53,290 INFO L87 Difference]: Start difference. First operand 498 states and 626 transitions. Second operand has 240 states, 240 states have (on average 2.1083333333333334) internal successors, (506), 240 states have internal predecessors, (506), 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) [2023-11-29 02:41:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:41:55,731 INFO L93 Difference]: Finished difference Result 1268 states and 1780 transitions. [2023-11-29 02:41:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2023-11-29 02:41:55,732 INFO L78 Accepts]: Start accepts. Automaton has has 240 states, 240 states have (on average 2.1083333333333334) internal successors, (506), 240 states have internal predecessors, (506), 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 309 [2023-11-29 02:41:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:41:55,738 INFO L225 Difference]: With dead ends: 1268 [2023-11-29 02:41:55,738 INFO L226 Difference]: Without dead ends: 883 [2023-11-29 02:41:55,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13986 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=14568, Invalid=42792, Unknown=0, NotChecked=0, Total=57360 [2023-11-29 02:41:55,741 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 495 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:41:55,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 247 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:41:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2023-11-29 02:41:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2023-11-29 02:41:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.2913832199546484) internal successors, (1139), 882 states have internal predecessors, (1139), 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) [2023-11-29 02:41:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1139 transitions. [2023-11-29 02:41:55,768 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1139 transitions. Word has length 309 [2023-11-29 02:41:55,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:41:55,769 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1139 transitions. [2023-11-29 02:41:55,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 240 states, 240 states have (on average 2.1083333333333334) internal successors, (506), 240 states have internal predecessors, (506), 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) [2023-11-29 02:41:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1139 transitions. [2023-11-29 02:41:55,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-11-29 02:41:55,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:41:55,784 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:41:55,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:41:55,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:41:55,984 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:41:55,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:41:55,985 INFO L85 PathProgramCache]: Analyzing trace with hash 380922120, now seen corresponding path program 11 times [2023-11-29 02:41:55,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:41:55,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33993229] [2023-11-29 02:41:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:41:55,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:41:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:42:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30080 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 23752 trivial. 0 not checked. [2023-11-29 02:42:04,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:42:04,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33993229] [2023-11-29 02:42:04,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33993229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:42:04,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737195752] [2023-11-29 02:42:04,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:42:04,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:42:04,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:42:04,913 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:42:04,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bacf80ee-6800-4310-92ab-82b9a953c648/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process