./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg60-1.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_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/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_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg60-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/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_b3a88693-0ca2-4310-9535-e4fb528188b9/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 536af0e32effc3a2288f843fefca54fb0104ab1d17ed14d79ddc92c629dbee95 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:43:17,618 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:43:17,686 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:43:17,691 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:43:17,692 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:43:17,714 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:43:17,714 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:43:17,715 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:43:17,716 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:43:17,716 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:43:17,717 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:43:17,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:43:17,718 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:43:17,719 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:43:17,719 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:43:17,720 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:43:17,721 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:43:17,721 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:43:17,722 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:43:17,722 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:43:17,723 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:43:17,723 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:43:17,724 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:43:17,724 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:43:17,725 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:43:17,725 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:43:17,726 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:43:17,726 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:43:17,727 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:43:17,727 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:43:17,727 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:43:17,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:43:17,728 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:43:17,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:43:17,729 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:43:17,729 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:43:17,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:43:17,729 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:43:17,729 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:43:17,730 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:43:17,730 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:43:17,730 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:43:17,730 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_b3a88693-0ca2-4310-9535-e4fb528188b9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 536af0e32effc3a2288f843fefca54fb0104ab1d17ed14d79ddc92c629dbee95 [2023-11-29 05:43:17,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:43:18,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:43:18,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:43:18,012 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:43:18,013 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:43:18,014 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/reducercommutativity/avg60-1.i [2023-11-29 05:43:20,872 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:43:21,042 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:43:21,043 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/sv-benchmarks/c/reducercommutativity/avg60-1.i [2023-11-29 05:43:21,050 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/data/1233cd594/3ec4ba17feec4a63ada873f3c94f8c44/FLAGceecc5602 [2023-11-29 05:43:21,064 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/data/1233cd594/3ec4ba17feec4a63ada873f3c94f8c44 [2023-11-29 05:43:21,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:43:21,068 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:43:21,070 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:43:21,070 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:43:21,074 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:43:21,075 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,076 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f8ed822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21, skipping insertion in model container [2023-11-29 05:43:21,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,097 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:43:21,265 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_b3a88693-0ca2-4310-9535-e4fb528188b9/sv-benchmarks/c/reducercommutativity/avg60-1.i[1282,1295] [2023-11-29 05:43:21,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:43:21,279 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:43:21,300 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_b3a88693-0ca2-4310-9535-e4fb528188b9/sv-benchmarks/c/reducercommutativity/avg60-1.i[1282,1295] [2023-11-29 05:43:21,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:43:21,317 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:43:21,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21 WrapperNode [2023-11-29 05:43:21,318 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:43:21,319 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:43:21,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:43:21,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:43:21,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,335 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,356 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-29 05:43:21,356 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:43:21,357 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:43:21,357 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:43:21,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:43:21,369 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,370 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,372 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,385 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-11-29 05:43:21,386 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,386 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,392 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,395 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,397 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,398 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,400 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:43:21,401 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:43:21,402 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:43:21,402 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:43:21,403 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (1/1) ... [2023-11-29 05:43:21,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:43:21,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:21,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:43:21,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:43:21,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:43:21,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:43:21,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:43:21,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:43:21,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:43:21,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:43:21,470 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2023-11-29 05:43:21,470 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2023-11-29 05:43:21,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:43:21,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:43:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:43:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:43:21,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:43:21,547 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:43:21,549 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:43:21,688 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:43:21,717 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:43:21,718 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 05:43:21,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:43:21 BoogieIcfgContainer [2023-11-29 05:43:21,718 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:43:21,721 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:43:21,722 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:43:21,725 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:43:21,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:43:21" (1/3) ... [2023-11-29 05:43:21,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be6a594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:43:21, skipping insertion in model container [2023-11-29 05:43:21,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:43:21" (2/3) ... [2023-11-29 05:43:21,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be6a594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:43:21, skipping insertion in model container [2023-11-29 05:43:21,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:43:21" (3/3) ... [2023-11-29 05:43:21,729 INFO L112 eAbstractionObserver]: Analyzing ICFG avg60-1.i [2023-11-29 05:43:21,747 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:43:21,747 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:43:21,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:43:21,803 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;@26baa3d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:43:21,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:43:21,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 05:43:21,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:21,815 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:21,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:21,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:21,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1444276640, now seen corresponding path program 1 times [2023-11-29 05:43:21,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:21,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533034495] [2023-11-29 05:43:21,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:21,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:22,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:43:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:22,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:43:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:22,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:43:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:43:22,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:22,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533034495] [2023-11-29 05:43:22,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533034495] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:22,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782366228] [2023-11-29 05:43:22,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:22,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:22,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:22,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:22,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:43:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:22,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 05:43:22,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:43:22,312 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:43:22,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782366228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:43:22,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:43:22,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2023-11-29 05:43:22,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091119496] [2023-11-29 05:43:22,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:22,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:43:22,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:22,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:43:22,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:43:22,346 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:43:22,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:22,376 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2023-11-29 05:43:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:43:22,379 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-11-29 05:43:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:22,387 INFO L225 Difference]: With dead ends: 38 [2023-11-29 05:43:22,387 INFO L226 Difference]: Without dead ends: 18 [2023-11-29 05:43:22,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:43:22,394 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:22,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:43:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-29 05:43:22,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-29 05:43:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-29 05:43:22,433 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 25 [2023-11-29 05:43:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:22,434 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-29 05:43:22,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:43:22,435 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-29 05:43:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 05:43:22,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:22,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:22,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:43:22,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:22,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:22,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:22,639 INFO L85 PathProgramCache]: Analyzing trace with hash -265195610, now seen corresponding path program 1 times [2023-11-29 05:43:22,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:22,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171991078] [2023-11-29 05:43:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:22,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:22,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:43:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:22,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:43:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:22,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:43:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:43:22,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:22,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171991078] [2023-11-29 05:43:22,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171991078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:22,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168032801] [2023-11-29 05:43:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:22,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:22,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:22,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:22,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:43:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:22,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:43:22,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 05:43:22,870 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:43:22,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168032801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:43:22,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:43:22,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-29 05:43:22,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116308084] [2023-11-29 05:43:22,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:22,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:43:22,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:22,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:43:22,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:43:22,874 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:43:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:22,895 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-11-29 05:43:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:43:22,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-29 05:43:22,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:22,897 INFO L225 Difference]: With dead ends: 35 [2023-11-29 05:43:22,897 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 05:43:22,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:43:22,899 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:22,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:43:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 05:43:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-29 05:43:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-29 05:43:22,906 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 25 [2023-11-29 05:43:22,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:22,906 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-29 05:43:22,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:43:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-29 05:43:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 05:43:22,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:22,908 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:22,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:43:23,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:23,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:23,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash 774126172, now seen corresponding path program 1 times [2023-11-29 05:43:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:23,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927613285] [2023-11-29 05:43:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:23,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:23,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 05:43:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:23,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:43:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:23,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-29 05:43:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:43:23,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:23,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927613285] [2023-11-29 05:43:23,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927613285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:23,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034831506] [2023-11-29 05:43:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:23,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:23,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:23,235 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:23,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:43:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:23,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:43:23,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:43:23,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:43:23,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034831506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:43:23,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:43:23,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-29 05:43:23,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61107727] [2023-11-29 05:43:23,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:23,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:43:23,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:23,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:43:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:43:23,322 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:43:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:23,340 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2023-11-29 05:43:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:43:23,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-29 05:43:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:23,341 INFO L225 Difference]: With dead ends: 34 [2023-11-29 05:43:23,341 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 05:43:23,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 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 05:43:23,343 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:23,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:43:23,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 05:43:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-29 05:43:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-29 05:43:23,349 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 26 [2023-11-29 05:43:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:23,349 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-29 05:43:23,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:43:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-29 05:43:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 05:43:23,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:23,351 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:23,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:43:23,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:23,552 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:23,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:23,552 INFO L85 PathProgramCache]: Analyzing trace with hash 406480427, now seen corresponding path program 1 times [2023-11-29 05:43:23,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:23,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461604504] [2023-11-29 05:43:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:23,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:23,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 05:43:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:23,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:43:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:23,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 05:43:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 05:43:23,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461604504] [2023-11-29 05:43:23,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461604504] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675798465] [2023-11-29 05:43:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:23,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:23,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:23,644 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:23,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:43:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:23,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:43:23,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 05:43:23,739 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:43:23,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675798465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:43:23,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:43:23,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-29 05:43:23,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019219930] [2023-11-29 05:43:23,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:43:23,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:43:23,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:23,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:43:23,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:43:23,741 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:43:23,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:23,759 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-11-29 05:43:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:43:23,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-11-29 05:43:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:23,761 INFO L225 Difference]: With dead ends: 32 [2023-11-29 05:43:23,761 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 05:43:23,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 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 05:43:23,762 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:23,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:43:23,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 05:43:23,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-29 05:43:23,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-29 05:43:23,768 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 29 [2023-11-29 05:43:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:23,768 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-29 05:43:23,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:43:23,769 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-29 05:43:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 05:43:23,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:23,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:23,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:43:23,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:23,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:23,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1488649810, now seen corresponding path program 1 times [2023-11-29 05:43:23,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:23,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70443260] [2023-11-29 05:43:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:23,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:24,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 05:43:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:24,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 05:43:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:24,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 05:43:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 05:43:24,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:24,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70443260] [2023-11-29 05:43:24,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70443260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:24,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823630809] [2023-11-29 05:43:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:24,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:24,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:24,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:24,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:43:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:24,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:43:24,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 05:43:24,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 05:43:24,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823630809] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:24,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:24,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-29 05:43:24,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816563858] [2023-11-29 05:43:24,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:24,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:43:24,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:24,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:43:24,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:43:24,218 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 05:43:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:24,247 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-11-29 05:43:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:43:24,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2023-11-29 05:43:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:24,248 INFO L225 Difference]: With dead ends: 42 [2023-11-29 05:43:24,248 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 05:43:24,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 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 05:43:24,249 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:24,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:43:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 05:43:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-29 05:43:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-29 05:43:24,255 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-11-29 05:43:24,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:24,255 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-29 05:43:24,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 05:43:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-29 05:43:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 05:43:24,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:24,257 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:24,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:43:24,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:24,462 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:24,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:24,463 INFO L85 PathProgramCache]: Analyzing trace with hash -944391140, now seen corresponding path program 2 times [2023-11-29 05:43:24,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:24,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531733814] [2023-11-29 05:43:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:24,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:24,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 05:43:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:24,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-29 05:43:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:24,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-29 05:43:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 05:43:24,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:24,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531733814] [2023-11-29 05:43:24,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531733814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:24,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425099903] [2023-11-29 05:43:24,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:43:24,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:24,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:24,562 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:24,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:43:24,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:43:24,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:24,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:43:24,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 05:43:24,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 05:43:24,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425099903] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:24,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:24,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-11-29 05:43:24,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612400038] [2023-11-29 05:43:24,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:24,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:43:24,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:43:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:43:24,778 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 05:43:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:24,832 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2023-11-29 05:43:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:43:24,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2023-11-29 05:43:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:24,833 INFO L225 Difference]: With dead ends: 49 [2023-11-29 05:43:24,833 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 05:43:24,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 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 05:43:24,835 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:24,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:43:24,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 05:43:24,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-29 05:43:24,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-29 05:43:24,842 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 33 [2023-11-29 05:43:24,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:24,842 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-29 05:43:24,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-29 05:43:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-29 05:43:24,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 05:43:24,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:24,845 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:24,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 05:43:25,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 05:43:25,052 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:25,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:25,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1083945041, now seen corresponding path program 3 times [2023-11-29 05:43:25,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:25,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118577373] [2023-11-29 05:43:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:25,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:25,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 05:43:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:25,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 05:43:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:25,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-29 05:43:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-29 05:43:25,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:25,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118577373] [2023-11-29 05:43:25,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118577373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:25,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615171328] [2023-11-29 05:43:25,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:43:25,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:25,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:25,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:25,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:43:25,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:43:25,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:25,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:43:25,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 05:43:25,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 05:43:25,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615171328] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:25,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:25,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-29 05:43:25,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323964759] [2023-11-29 05:43:25,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:25,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:43:25,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:25,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:43:25,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:43:25,303 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 05:43:25,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:25,344 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-11-29 05:43:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:43:25,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2023-11-29 05:43:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:25,345 INFO L225 Difference]: With dead ends: 53 [2023-11-29 05:43:25,345 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 05:43:25,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:43:25,347 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:25,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:43:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 05:43:25,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-29 05:43:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-29 05:43:25,355 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2023-11-29 05:43:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:25,356 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-29 05:43:25,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 05:43:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-29 05:43:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 05:43:25,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:25,358 INFO L195 NwaCegarLoop]: trace histogram [18, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:25,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:43:25,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 05:43:25,564 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:25,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:25,564 INFO L85 PathProgramCache]: Analyzing trace with hash -407743002, now seen corresponding path program 4 times [2023-11-29 05:43:25,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:25,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294909510] [2023-11-29 05:43:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:25,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:25,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 05:43:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:25,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 05:43:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:25,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 05:43:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-29 05:43:25,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:25,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294909510] [2023-11-29 05:43:25,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294909510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:25,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636932052] [2023-11-29 05:43:25,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:43:25,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:25,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:25,860 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:25,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:43:25,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:43:25,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:25,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:43:25,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-29 05:43:26,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-29 05:43:26,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636932052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:26,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:26,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2023-11-29 05:43:26,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918642578] [2023-11-29 05:43:26,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:26,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:43:26,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:43:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:43:26,236 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 05:43:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:26,298 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2023-11-29 05:43:26,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:43:26,298 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2023-11-29 05:43:26,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:26,299 INFO L225 Difference]: With dead ends: 72 [2023-11-29 05:43:26,300 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 05:43:26,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:43:26,301 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:26,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:43:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 05:43:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-29 05:43:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:26,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-11-29 05:43:26,310 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 55 [2023-11-29 05:43:26,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:26,310 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-11-29 05:43:26,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 05:43:26,310 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-11-29 05:43:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 05:43:26,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:26,312 INFO L195 NwaCegarLoop]: trace histogram [22, 18, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:26,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:43:26,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:26,516 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:26,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:26,517 INFO L85 PathProgramCache]: Analyzing trace with hash 446443110, now seen corresponding path program 5 times [2023-11-29 05:43:26,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:26,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871649721] [2023-11-29 05:43:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:26,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:27,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 05:43:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:27,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-29 05:43:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:27,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-29 05:43:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-29 05:43:27,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:27,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871649721] [2023-11-29 05:43:27,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871649721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:27,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102060994] [2023-11-29 05:43:27,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:43:27,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:27,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:27,212 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:27,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:43:28,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-29 05:43:28,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:28,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:43:28,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 104 proven. 3 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2023-11-29 05:43:28,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2023-11-29 05:43:28,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102060994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:28,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:28,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2023-11-29 05:43:28,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225365748] [2023-11-29 05:43:28,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:28,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 05:43:28,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:28,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 05:43:28,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:43:28,425 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 05:43:28,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:28,496 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2023-11-29 05:43:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 05:43:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2023-11-29 05:43:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:28,498 INFO L225 Difference]: With dead ends: 77 [2023-11-29 05:43:28,499 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 05:43:28,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:43:28,500 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:28,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:43:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 05:43:28,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-29 05:43:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-11-29 05:43:28,509 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 67 [2023-11-29 05:43:28,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:28,509 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-11-29 05:43:28,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 05:43:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-11-29 05:43:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 05:43:28,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:28,511 INFO L195 NwaCegarLoop]: trace histogram [23, 18, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:28,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:43:28,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:28,716 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:28,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:28,717 INFO L85 PathProgramCache]: Analyzing trace with hash -372261668, now seen corresponding path program 6 times [2023-11-29 05:43:28,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:28,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66777940] [2023-11-29 05:43:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:28,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:29,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-29 05:43:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:29,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-29 05:43:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:29,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-11-29 05:43:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-11-29 05:43:29,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:29,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66777940] [2023-11-29 05:43:29,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66777940] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:29,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407664904] [2023-11-29 05:43:29,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:43:29,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:29,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:29,524 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:29,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:43:29,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 05:43:29,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:29,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:43:29,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-11-29 05:43:30,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-11-29 05:43:30,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407664904] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:30,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:30,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2023-11-29 05:43:30,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795677652] [2023-11-29 05:43:30,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:30,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 05:43:30,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:30,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 05:43:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 05:43:30,227 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 05:43:30,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:30,305 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2023-11-29 05:43:30,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 05:43:30,306 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 72 [2023-11-29 05:43:30,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:30,307 INFO L225 Difference]: With dead ends: 90 [2023-11-29 05:43:30,307 INFO L226 Difference]: Without dead ends: 62 [2023-11-29 05:43:30,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 05:43:30,310 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:30,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:43:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-29 05:43:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-29 05:43:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2023-11-29 05:43:30,318 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 72 [2023-11-29 05:43:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:30,318 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2023-11-29 05:43:30,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 05:43:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2023-11-29 05:43:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-29 05:43:30,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:30,320 INFO L195 NwaCegarLoop]: trace histogram [42, 24, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:30,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:43:30,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:43:30,524 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:30,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash -62936090, now seen corresponding path program 7 times [2023-11-29 05:43:30,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:30,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606623278] [2023-11-29 05:43:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:30,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:31,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-29 05:43:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:31,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-29 05:43:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:31,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-29 05:43:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-11-29 05:43:31,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:31,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606623278] [2023-11-29 05:43:31,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606623278] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:31,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010978903] [2023-11-29 05:43:31,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:43:31,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:31,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:31,433 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:31,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:43:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:31,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:43:31,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-11-29 05:43:31,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-11-29 05:43:32,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010978903] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:32,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:32,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 53 [2023-11-29 05:43:32,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413271276] [2023-11-29 05:43:32,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:32,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 05:43:32,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:32,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 05:43:32,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 05:43:32,511 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 05:43:32,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:32,580 INFO L93 Difference]: Finished difference Result 124 states and 157 transitions. [2023-11-29 05:43:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 05:43:32,581 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 97 [2023-11-29 05:43:32,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:32,582 INFO L225 Difference]: With dead ends: 124 [2023-11-29 05:43:32,582 INFO L226 Difference]: Without dead ends: 88 [2023-11-29 05:43:32,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 05:43:32,585 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:32,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:43:32,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-29 05:43:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-29 05:43:32,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2023-11-29 05:43:32,595 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 97 [2023-11-29 05:43:32,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:32,596 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2023-11-29 05:43:32,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 53 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 05:43:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2023-11-29 05:43:32,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-29 05:43:32,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:32,598 INFO L195 NwaCegarLoop]: trace histogram [50, 42, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:32,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:43:32,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 05:43:32,804 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:32,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1785875546, now seen corresponding path program 8 times [2023-11-29 05:43:32,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:32,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294578883] [2023-11-29 05:43:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:32,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:35,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-29 05:43:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:35,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-11-29 05:43:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:35,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-11-29 05:43:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-11-29 05:43:35,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:35,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294578883] [2023-11-29 05:43:35,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294578883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:35,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418827354] [2023-11-29 05:43:35,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:43:35,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:35,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:35,043 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:35,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:43:35,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:43:35,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:35,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 05:43:35,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-11-29 05:43:35,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 1020 trivial. 0 not checked. [2023-11-29 05:43:36,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418827354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:36,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:36,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 53] total 63 [2023-11-29 05:43:36,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717034147] [2023-11-29 05:43:36,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:36,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-29 05:43:36,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:36,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-29 05:43:36,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 05:43:36,656 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 05:43:36,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:36,738 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2023-11-29 05:43:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 05:43:36,738 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 123 [2023-11-29 05:43:36,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:36,739 INFO L225 Difference]: With dead ends: 134 [2023-11-29 05:43:36,740 INFO L226 Difference]: Without dead ends: 98 [2023-11-29 05:43:36,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 199 SyntacticMatches, 42 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 05:43:36,742 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:36,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:43:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-29 05:43:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-11-29 05:43:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2023-11-29 05:43:36,753 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 123 [2023-11-29 05:43:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:36,753 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2023-11-29 05:43:36,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 63 states have internal predecessors, (82), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 05:43:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2023-11-29 05:43:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-29 05:43:36,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:36,755 INFO L195 NwaCegarLoop]: trace histogram [60, 42, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:36,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:43:36,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:43:36,960 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:36,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:36,960 INFO L85 PathProgramCache]: Analyzing trace with hash -467200666, now seen corresponding path program 9 times [2023-11-29 05:43:36,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:36,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139384939] [2023-11-29 05:43:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:36,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:37,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 05:43:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:37,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-29 05:43:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:37,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-29 05:43:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 2291 trivial. 0 not checked. [2023-11-29 05:43:37,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:37,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139384939] [2023-11-29 05:43:37,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139384939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:37,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464220284] [2023-11-29 05:43:37,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:43:37,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:37,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:37,639 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:37,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:43:37,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 05:43:37,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:37,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:43:37,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 456 proven. 21 refuted. 0 times theorem prover too weak. 2373 trivial. 0 not checked. [2023-11-29 05:43:37,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2829 trivial. 0 not checked. [2023-11-29 05:43:38,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464220284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:38,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:38,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2023-11-29 05:43:38,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252212501] [2023-11-29 05:43:38,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:38,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 05:43:38,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:38,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 05:43:38,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:43:38,115 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 05:43:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:38,175 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2023-11-29 05:43:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 05:43:38,175 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 133 [2023-11-29 05:43:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:38,176 INFO L225 Difference]: With dead ends: 141 [2023-11-29 05:43:38,176 INFO L226 Difference]: Without dead ends: 107 [2023-11-29 05:43:38,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:43:38,178 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:38,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 118 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:43:38,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-29 05:43:38,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-29 05:43:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2023-11-29 05:43:38,188 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 133 [2023-11-29 05:43:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:38,188 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2023-11-29 05:43:38,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 05:43:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2023-11-29 05:43:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-29 05:43:38,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:38,190 INFO L195 NwaCegarLoop]: trace histogram [60, 45, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:38,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:43:38,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:43:38,396 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:38,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash 53185761, now seen corresponding path program 10 times [2023-11-29 05:43:38,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:38,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720655845] [2023-11-29 05:43:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:38,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:38,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 05:43:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:39,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2023-11-29 05:43:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:39,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-11-29 05:43:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2023-11-29 05:43:39,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:39,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720655845] [2023-11-29 05:43:39,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720655845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:39,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485719818] [2023-11-29 05:43:39,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:43:39,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:39,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:39,021 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:39,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:43:39,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:43:39,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:39,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:43:39,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 514 proven. 120 refuted. 0 times theorem prover too weak. 2438 trivial. 0 not checked. [2023-11-29 05:43:39,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2023-11-29 05:43:39,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485719818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:39,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:39,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-11-29 05:43:39,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558993515] [2023-11-29 05:43:39,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:39,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 05:43:39,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 05:43:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 05:43:39,785 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:43:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:39,831 INFO L93 Difference]: Finished difference Result 167 states and 193 transitions. [2023-11-29 05:43:39,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 05:43:39,831 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2023-11-29 05:43:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:39,832 INFO L225 Difference]: With dead ends: 167 [2023-11-29 05:43:39,833 INFO L226 Difference]: Without dead ends: 124 [2023-11-29 05:43:39,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 05:43:39,834 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:39,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:43:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-29 05:43:39,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-29 05:43:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 05:43:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2023-11-29 05:43:39,844 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 144 [2023-11-29 05:43:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:39,844 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2023-11-29 05:43:39,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:43:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2023-11-29 05:43:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-29 05:43:39,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:39,847 INFO L195 NwaCegarLoop]: trace histogram [96, 60, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:39,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:43:40,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:43:40,048 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:40,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash -33357818, now seen corresponding path program 11 times [2023-11-29 05:43:40,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:40,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323071852] [2023-11-29 05:43:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:40,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:40,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-29 05:43:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:41,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-11-29 05:43:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:41,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2023-11-29 05:43:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6795 backedges. 0 proven. 2710 refuted. 0 times theorem prover too weak. 4085 trivial. 0 not checked. [2023-11-29 05:43:41,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:41,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323071852] [2023-11-29 05:43:41,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323071852] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:41,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581951180] [2023-11-29 05:43:41,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:43:41,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:41,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:41,619 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:41,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3a88693-0ca2-4310-9535-e4fb528188b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process