./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/mapavg3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/mapavg3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU --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 0c77653a602ef2869a70dbeec3f7f47f64eb0584e28f8389865460dcae0ce0cd --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:58:09,701 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:58:09,796 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:58:09,801 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:58:09,802 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:58:09,837 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:58:09,840 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:58:09,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:58:09,842 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:58:09,844 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:58:09,844 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:58:09,844 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:58:09,845 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:58:09,846 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:58:09,848 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:58:09,848 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:58:09,849 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:58:09,849 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:58:09,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:58:09,853 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:58:09,853 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:58:09,854 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:58:09,854 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:58:09,854 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:58:09,854 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:58:09,855 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:58:09,855 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:58:09,855 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:58:09,855 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:58:09,856 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:58:09,856 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:58:09,856 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:58:09,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:58:09,857 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:58:09,857 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:58:09,858 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:58:09,858 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:58:09,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:58:09,859 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:58:09,859 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:58:09,860 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:58:09,860 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:58:09,861 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_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c77653a602ef2869a70dbeec3f7f47f64eb0584e28f8389865460dcae0ce0cd [2024-10-31 21:58:10,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:58:10,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:58:10,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:58:10,192 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:58:10,193 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:58:10,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/array-crafted/mapavg3.i Unable to find full path for "g++" [2024-10-31 21:58:12,389 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:58:12,604 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:58:12,604 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/sv-benchmarks/c/array-crafted/mapavg3.i [2024-10-31 21:58:12,613 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/data/e0a414fba/3b89242c637846f9a0f9c5c7d7f63131/FLAGa44105df0 [2024-10-31 21:58:12,960 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/data/e0a414fba/3b89242c637846f9a0f9c5c7d7f63131 [2024-10-31 21:58:12,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:58:12,964 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:58:12,966 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:58:12,966 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:58:12,973 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:58:12,974 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:58:12" (1/1) ... [2024-10-31 21:58:12,975 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@688671f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:12, skipping insertion in model container [2024-10-31 21:58:12,976 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:58:12" (1/1) ... [2024-10-31 21:58:13,008 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:58:13,235 WARN L251 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_5391c05b-c885-419a-acb5-9976cf26c01a/sv-benchmarks/c/array-crafted/mapavg3.i[1320,1333] [2024-10-31 21:58:13,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:58:13,248 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:58:13,278 WARN L251 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_5391c05b-c885-419a-acb5-9976cf26c01a/sv-benchmarks/c/array-crafted/mapavg3.i[1320,1333] [2024-10-31 21:58:13,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:58:13,300 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:58:13,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13 WrapperNode [2024-10-31 21:58:13,301 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:58:13,303 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:58:13,303 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:58:13,303 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:58:13,313 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (1/1) ... [2024-10-31 21:58:13,321 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (1/1) ... [2024-10-31 21:58:13,343 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-10-31 21:58:13,343 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:58:13,344 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:58:13,345 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:58:13,345 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:58:13,361 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (1/1) ... [2024-10-31 21:58:13,361 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (1/1) ... [2024-10-31 21:58:13,363 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (1/1) ... [2024-10-31 21:58:13,390 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]. [2024-10-31 21:58:13,391 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (1/1) ... [2024-10-31 21:58:13,391 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (1/1) ... [2024-10-31 21:58:13,402 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (1/1) ... [2024-10-31 21:58:13,410 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (1/1) ... [2024-10-31 21:58:13,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (1/1) ... [2024-10-31 21:58:13,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (1/1) ... [2024-10-31 21:58:13,422 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:58:13,423 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:58:13,423 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:58:13,423 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:58:13,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (1/1) ... [2024-10-31 21:58:13,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:58:13,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:13,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:58:13,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:58:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:58:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:58:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:58:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 21:58:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:58:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:58:13,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:58:13,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:58:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:58:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:58:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2024-10-31 21:58:13,514 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2024-10-31 21:58:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 21:58:13,603 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:58:13,605 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:58:13,781 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-10-31 21:58:13,782 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:58:13,795 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:58:13,795 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 21:58:13,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:58:13 BoogieIcfgContainer [2024-10-31 21:58:13,796 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:58:13,799 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:58:13,799 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:58:13,803 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:58:13,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:58:12" (1/3) ... [2024-10-31 21:58:13,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5142204d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:58:13, skipping insertion in model container [2024-10-31 21:58:13,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:58:13" (2/3) ... [2024-10-31 21:58:13,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5142204d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:58:13, skipping insertion in model container [2024-10-31 21:58:13,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:58:13" (3/3) ... [2024-10-31 21:58:13,807 INFO L112 eAbstractionObserver]: Analyzing ICFG mapavg3.i [2024-10-31 21:58:13,826 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:58:13,826 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 21:58:13,892 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:58:13,899 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5037bde3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:58:13,900 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 21:58:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 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) [2024-10-31 21:58:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-31 21:58:13,916 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:13,917 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:13,918 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:13,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1943508516, now seen corresponding path program 1 times [2024-10-31 21:58:13,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:13,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601025759] [2024-10-31 21:58:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:13,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:14,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:58:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:14,427 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 21:58:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:14,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-31 21:58:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 21:58:14,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:14,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601025759] [2024-10-31 21:58:14,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601025759] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:14,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876794837] [2024-10-31 21:58:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:14,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:14,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:14,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:14,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:58:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:14,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-31 21:58:14,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 21:58:14,731 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:58:14,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876794837] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:14,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:58:14,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2024-10-31 21:58:14,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239105927] [2024-10-31 21:58:14,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:14,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 21:58:14,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:14,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 21:58:14,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:58:14,777 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 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) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2024-10-31 21:58:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:14,800 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2024-10-31 21:58:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 21:58:14,803 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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 [2024-10-31 21:58:14,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:14,811 INFO L225 Difference]: With dead ends: 50 [2024-10-31 21:58:14,812 INFO L226 Difference]: Without dead ends: 23 [2024-10-31 21:58:14,816 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:58:14,820 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:14,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:58:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-31 21:58:14,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-31 21:58:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2024-10-31 21:58:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-10-31 21:58:14,865 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2024-10-31 21:58:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:14,867 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-10-31 21:58:14,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 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) [2024-10-31 21:58:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-10-31 21:58:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-31 21:58:14,869 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:14,870 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:14,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 21:58:15,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:15,073 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:15,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:15,076 INFO L85 PathProgramCache]: Analyzing trace with hash 248265046, now seen corresponding path program 1 times [2024-10-31 21:58:15,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:15,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044166271] [2024-10-31 21:58:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:15,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:15,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 21:58:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:15,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 21:58:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:15,328 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-31 21:58:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 21:58:15,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:15,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044166271] [2024-10-31 21:58:15,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044166271] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:15,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623406384] [2024-10-31 21:58:15,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:15,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:15,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:15,345 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:15,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:58:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:15,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 21:58:15,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 21:58:15,498 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:58:15,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623406384] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:15,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:58:15,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 21:58:15,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787578875] [2024-10-31 21:58:15,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:15,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:58:15,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:15,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:58:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:58:15,504 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2024-10-31 21:58:15,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:15,531 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2024-10-31 21:58:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:58:15,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 29 [2024-10-31 21:58:15,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:15,534 INFO L225 Difference]: With dead ends: 44 [2024-10-31 21:58:15,534 INFO L226 Difference]: Without dead ends: 25 [2024-10-31 21:58:15,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:58:15,537 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 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 [2024-10-31 21:58:15,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:58:15,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-31 21:58:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-10-31 21:58:15,548 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) [2024-10-31 21:58:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-10-31 21:58:15,550 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 29 [2024-10-31 21:58:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:15,550 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-10-31 21:58:15,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2024-10-31 21:58:15,551 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-10-31 21:58:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-31 21:58:15,552 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:15,552 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:15,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 21:58:15,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:15,759 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:15,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:15,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1661838444, now seen corresponding path program 1 times [2024-10-31 21:58:15,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:15,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703901134] [2024-10-31 21:58:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:15,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:15,906 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 21:58:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:15,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-31 21:58:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:15,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 21:58:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 21:58:15,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:15,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703901134] [2024-10-31 21:58:15,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703901134] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:15,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825485214] [2024-10-31 21:58:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:15,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:15,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:15,945 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:15,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:58:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:16,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 21:58:16,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 21:58:16,057 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:58:16,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825485214] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:16,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:58:16,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-31 21:58:16,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474126238] [2024-10-31 21:58:16,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:16,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:58:16,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:16,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:58:16,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:58:16,063 INFO L87 Difference]: Start difference. First operand 24 states and 28 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 21:58:16,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:16,083 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2024-10-31 21:58:16,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:58:16,084 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-10-31 21:58:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:16,085 INFO L225 Difference]: With dead ends: 43 [2024-10-31 21:58:16,086 INFO L226 Difference]: Without dead ends: 26 [2024-10-31 21:58:16,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:58:16,089 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:16,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:58:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-31 21:58:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-10-31 21:58:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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) [2024-10-31 21:58:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-31 21:58:16,103 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 31 [2024-10-31 21:58:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:16,104 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-31 21:58:16,104 INFO L472 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 21:58:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-31 21:58:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-31 21:58:16,105 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:16,107 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:16,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 21:58:16,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:16,308 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:16,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:16,309 INFO L85 PathProgramCache]: Analyzing trace with hash 967398962, now seen corresponding path program 1 times [2024-10-31 21:58:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:16,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581987015] [2024-10-31 21:58:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:16,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:16,408 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 21:58:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:16,459 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-31 21:58:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:16,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-31 21:58:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-31 21:58:16,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:16,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581987015] [2024-10-31 21:58:16,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581987015] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:16,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279344655] [2024-10-31 21:58:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:16,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:16,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:16,513 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:16,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:58:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:16,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 21:58:16,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-31 21:58:16,623 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:58:16,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279344655] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:58:16,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:58:16,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-10-31 21:58:16,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55210525] [2024-10-31 21:58:16,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:58:16,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 21:58:16,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:16,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 21:58:16,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-31 21:58:16,628 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-31 21:58:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:16,650 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2024-10-31 21:58:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 21:58:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 37 [2024-10-31 21:58:16,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:16,653 INFO L225 Difference]: With dead ends: 40 [2024-10-31 21:58:16,653 INFO L226 Difference]: Without dead ends: 27 [2024-10-31 21:58:16,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-31 21:58:16,657 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:16,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:58:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-31 21:58:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-10-31 21:58:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2024-10-31 21:58:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-10-31 21:58:16,667 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 37 [2024-10-31 21:58:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:16,667 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-10-31 21:58:16,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-31 21:58:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-10-31 21:58:16,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 21:58:16,669 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:16,672 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:16,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 21:58:16,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:16,873 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:16,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:16,873 INFO L85 PathProgramCache]: Analyzing trace with hash 804140464, now seen corresponding path program 1 times [2024-10-31 21:58:16,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:16,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181660310] [2024-10-31 21:58:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:16,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:17,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 21:58:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:17,056 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-31 21:58:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:17,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-31 21:58:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 21:58:17,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:17,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181660310] [2024-10-31 21:58:17,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181660310] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:17,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283240202] [2024-10-31 21:58:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:17,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:17,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:17,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:17,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:58:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:17,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 21:58:17,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-31 21:58:17,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-31 21:58:17,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283240202] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:17,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:17,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2024-10-31 21:58:17,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648082945] [2024-10-31 21:58:17,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:17,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 21:58:17,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 21:58:17,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:58:17,305 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 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) [2024-10-31 21:58:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:17,367 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2024-10-31 21:58:17,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:58:17,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 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 39 [2024-10-31 21:58:17,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:17,368 INFO L225 Difference]: With dead ends: 56 [2024-10-31 21:58:17,368 INFO L226 Difference]: Without dead ends: 35 [2024-10-31 21:58:17,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:58:17,372 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:17,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 104 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:58:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-31 21:58:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2024-10-31 21:58:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 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) [2024-10-31 21:58:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2024-10-31 21:58:17,384 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 39 [2024-10-31 21:58:17,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:17,384 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2024-10-31 21:58:17,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 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) [2024-10-31 21:58:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2024-10-31 21:58:17,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-31 21:58:17,386 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:17,386 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:17,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 21:58:17,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:17,587 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:17,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:17,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1550669448, now seen corresponding path program 2 times [2024-10-31 21:58:17,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:17,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119583902] [2024-10-31 21:58:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:17,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:17,702 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-31 21:58:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:17,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-31 21:58:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:17,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-31 21:58:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-10-31 21:58:17,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:17,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119583902] [2024-10-31 21:58:17,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119583902] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:17,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744892624] [2024-10-31 21:58:17,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:58:17,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:17,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:17,732 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:17,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 21:58:17,841 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:58:17,841 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:58:17,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 21:58:17,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-31 21:58:17,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-31 21:58:18,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744892624] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:18,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:18,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-10-31 21:58:18,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036624132] [2024-10-31 21:58:18,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:18,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 21:58:18,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:18,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 21:58:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:58:18,033 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-31 21:58:18,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:18,141 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2024-10-31 21:58:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 21:58:18,144 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-10-31 21:58:18,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:18,145 INFO L225 Difference]: With dead ends: 72 [2024-10-31 21:58:18,145 INFO L226 Difference]: Without dead ends: 49 [2024-10-31 21:58:18,146 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:58:18,147 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:18,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:58:18,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-31 21:58:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-10-31 21:58:18,158 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) [2024-10-31 21:58:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-10-31 21:58:18,159 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 51 [2024-10-31 21:58:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:18,160 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-10-31 21:58:18,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-10-31 21:58:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-10-31 21:58:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-31 21:58:18,161 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:18,161 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:18,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-31 21:58:18,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:18,366 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:18,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:18,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2089754246, now seen corresponding path program 3 times [2024-10-31 21:58:18,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:18,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180149947] [2024-10-31 21:58:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:18,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:18,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:58:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:18,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-31 21:58:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:18,856 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-31 21:58:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-10-31 21:58:18,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:18,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180149947] [2024-10-31 21:58:18,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180149947] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:18,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61083722] [2024-10-31 21:58:18,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 21:58:18,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:18,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:18,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:18,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 21:58:18,992 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 21:58:18,992 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:58:18,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 21:58:18,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-10-31 21:58:19,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-10-31 21:58:19,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61083722] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:19,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:19,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2024-10-31 21:58:19,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780258614] [2024-10-31 21:58:19,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:19,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 21:58:19,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 21:58:19,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-31 21:58:19,165 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 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) [2024-10-31 21:58:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:19,262 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2024-10-31 21:58:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 21:58:19,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 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 65 [2024-10-31 21:58:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:19,264 INFO L225 Difference]: With dead ends: 84 [2024-10-31 21:58:19,264 INFO L226 Difference]: Without dead ends: 59 [2024-10-31 21:58:19,265 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-31 21:58:19,265 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:19,266 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 105 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:58:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-31 21:58:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-10-31 21:58:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 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) [2024-10-31 21:58:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-10-31 21:58:19,278 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 65 [2024-10-31 21:58:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:19,278 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-10-31 21:58:19,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 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) [2024-10-31 21:58:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-10-31 21:58:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-31 21:58:19,283 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:19,283 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:19,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 21:58:19,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:19,489 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:19,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:19,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1032758224, now seen corresponding path program 4 times [2024-10-31 21:58:19,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:19,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208308138] [2024-10-31 21:58:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:19,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:19,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-31 21:58:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:19,934 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-10-31 21:58:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:19,945 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-10-31 21:58:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2024-10-31 21:58:19,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:19,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208308138] [2024-10-31 21:58:19,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208308138] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:19,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555192312] [2024-10-31 21:58:19,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 21:58:19,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:19,959 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:19,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 21:58:20,101 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 21:58:20,102 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:58:20,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 21:58:20,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-10-31 21:58:20,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-10-31 21:58:20,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555192312] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:20,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:20,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2024-10-31 21:58:20,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181372272] [2024-10-31 21:58:20,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:20,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 21:58:20,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:20,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 21:58:20,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-10-31 21:58:20,237 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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) [2024-10-31 21:58:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:20,325 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2024-10-31 21:58:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-31 21:58:20,326 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 91 [2024-10-31 21:58:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:20,326 INFO L225 Difference]: With dead ends: 102 [2024-10-31 21:58:20,327 INFO L226 Difference]: Without dead ends: 69 [2024-10-31 21:58:20,327 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-10-31 21:58:20,328 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:20,328 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:58:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-31 21:58:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2024-10-31 21:58:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 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) [2024-10-31 21:58:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2024-10-31 21:58:20,342 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 91 [2024-10-31 21:58:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:20,342 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2024-10-31 21:58:20,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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) [2024-10-31 21:58:20,343 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2024-10-31 21:58:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-10-31 21:58:20,344 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:20,348 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:20,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 21:58:20,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:20,549 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:20,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:20,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1292895514, now seen corresponding path program 5 times [2024-10-31 21:58:20,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:20,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497075670] [2024-10-31 21:58:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:20,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:20,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-31 21:58:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:21,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-31 21:58:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:21,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-10-31 21:58:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2024-10-31 21:58:21,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:21,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497075670] [2024-10-31 21:58:21,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497075670] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:21,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644676133] [2024-10-31 21:58:21,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 21:58:21,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:21,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:21,027 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:21,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 21:58:22,165 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-10-31 21:58:22,165 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:58:22,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 21:58:22,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2024-10-31 21:58:22,307 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2024-10-31 21:58:22,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644676133] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:22,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:22,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2024-10-31 21:58:22,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258990600] [2024-10-31 21:58:22,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:22,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-31 21:58:22,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:22,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-31 21:58:22,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2024-10-31 21:58:22,512 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 21:58:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:22,632 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2024-10-31 21:58:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-31 21:58:22,633 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 101 [2024-10-31 21:58:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:22,634 INFO L225 Difference]: With dead ends: 128 [2024-10-31 21:58:22,634 INFO L226 Difference]: Without dead ends: 87 [2024-10-31 21:58:22,635 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2024-10-31 21:58:22,636 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:22,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 146 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:58:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-10-31 21:58:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-10-31 21:58:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 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) [2024-10-31 21:58:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2024-10-31 21:58:22,645 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 101 [2024-10-31 21:58:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:22,645 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2024-10-31 21:58:22,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-31 21:58:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2024-10-31 21:58:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-10-31 21:58:22,647 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:22,647 INFO L215 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:22,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-31 21:58:22,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:22,848 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:22,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2141045228, now seen corresponding path program 6 times [2024-10-31 21:58:22,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:22,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562200155] [2024-10-31 21:58:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:22,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:23,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-31 21:58:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:23,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-10-31 21:58:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:23,517 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-10-31 21:58:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2024-10-31 21:58:23,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562200155] [2024-10-31 21:58:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562200155] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596296802] [2024-10-31 21:58:23,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 21:58:23,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:23,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:23,539 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:23,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 21:58:23,882 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-10-31 21:58:23,883 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:58:23,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 21:58:23,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2024-10-31 21:58:24,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2024-10-31 21:58:24,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596296802] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:24,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:24,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-10-31 21:58:24,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899067357] [2024-10-31 21:58:24,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:24,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-31 21:58:24,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:24,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-31 21:58:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2024-10-31 21:58:24,303 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 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) [2024-10-31 21:58:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:24,431 INFO L93 Difference]: Finished difference Result 162 states and 178 transitions. [2024-10-31 21:58:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-31 21:58:24,432 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 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 151 [2024-10-31 21:58:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:24,433 INFO L225 Difference]: With dead ends: 162 [2024-10-31 21:58:24,434 INFO L226 Difference]: Without dead ends: 105 [2024-10-31 21:58:24,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2024-10-31 21:58:24,439 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:24,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:58:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-31 21:58:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2024-10-31 21:58:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 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) [2024-10-31 21:58:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2024-10-31 21:58:24,461 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 151 [2024-10-31 21:58:24,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:24,461 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2024-10-31 21:58:24,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 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) [2024-10-31 21:58:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2024-10-31 21:58:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-10-31 21:58:24,464 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:24,464 INFO L215 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:24,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-31 21:58:24,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 21:58:24,669 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:24,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:24,669 INFO L85 PathProgramCache]: Analyzing trace with hash -386944830, now seen corresponding path program 7 times [2024-10-31 21:58:24,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:24,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108849051] [2024-10-31 21:58:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:24,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:25,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-31 21:58:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:25,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-31 21:58:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:25,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-10-31 21:58:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2024-10-31 21:58:25,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108849051] [2024-10-31 21:58:25,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108849051] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:25,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090204262] [2024-10-31 21:58:25,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-31 21:58:25,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:25,427 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:25,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 21:58:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:25,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 21:58:25,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2024-10-31 21:58:25,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2024-10-31 21:58:26,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090204262] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:26,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:26,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-10-31 21:58:26,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022905889] [2024-10-31 21:58:26,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:26,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-31 21:58:26,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:26,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-31 21:58:26,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-31 21:58:26,335 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 33 states have internal predecessors, (86), 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) [2024-10-31 21:58:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:26,472 INFO L93 Difference]: Finished difference Result 209 states and 232 transitions. [2024-10-31 21:58:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-31 21:58:26,473 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 33 states have internal predecessors, (86), 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 169 [2024-10-31 21:58:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:26,475 INFO L225 Difference]: With dead ends: 209 [2024-10-31 21:58:26,475 INFO L226 Difference]: Without dead ends: 136 [2024-10-31 21:58:26,476 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-31 21:58:26,477 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:26,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:58:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-31 21:58:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-10-31 21:58:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 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) [2024-10-31 21:58:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2024-10-31 21:58:26,489 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 169 [2024-10-31 21:58:26,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:26,490 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2024-10-31 21:58:26,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 33 states have internal predecessors, (86), 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) [2024-10-31 21:58:26,490 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2024-10-31 21:58:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2024-10-31 21:58:26,494 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:26,494 INFO L215 NwaCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:26,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-31 21:58:26,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 21:58:26,698 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:26,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:26,699 INFO L85 PathProgramCache]: Analyzing trace with hash -408026974, now seen corresponding path program 8 times [2024-10-31 21:58:26,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:26,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173676302] [2024-10-31 21:58:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:26,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:28,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-31 21:58:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:28,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-10-31 21:58:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:28,433 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2024-10-31 21:58:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2024-10-31 21:58:28,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:28,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173676302] [2024-10-31 21:58:28,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173676302] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:28,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364556040] [2024-10-31 21:58:28,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:58:28,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:28,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:28,466 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:28,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 21:58:28,743 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:58:28,744 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:58:28,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-31 21:58:28,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2024-10-31 21:58:28,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2024-10-31 21:58:30,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364556040] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:30,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:30,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2024-10-31 21:58:30,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968893248] [2024-10-31 21:58:30,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:30,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-10-31 21:58:30,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:30,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-10-31 21:58:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-10-31 21:58:30,597 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 65 states, 65 states have (on average 2.3076923076923075) internal successors, (150), 65 states have internal predecessors, (150), 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) [2024-10-31 21:58:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:30,870 INFO L93 Difference]: Finished difference Result 273 states and 312 transitions. [2024-10-31 21:58:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-31 21:58:30,871 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.3076923076923075) internal successors, (150), 65 states have internal predecessors, (150), 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 201 [2024-10-31 21:58:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:30,872 INFO L225 Difference]: With dead ends: 273 [2024-10-31 21:58:30,872 INFO L226 Difference]: Without dead ends: 200 [2024-10-31 21:58:30,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-10-31 21:58:30,875 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:30,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 157 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:58:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-10-31 21:58:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2024-10-31 21:58:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 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) [2024-10-31 21:58:30,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2024-10-31 21:58:30,898 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 201 [2024-10-31 21:58:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:30,901 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2024-10-31 21:58:30,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.3076923076923075) internal successors, (150), 65 states have internal predecessors, (150), 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) [2024-10-31 21:58:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2024-10-31 21:58:30,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2024-10-31 21:58:30,906 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:30,906 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:30,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-31 21:58:31,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 21:58:31,110 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:31,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:31,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1250173026, now seen corresponding path program 9 times [2024-10-31 21:58:31,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:31,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417930021] [2024-10-31 21:58:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:31,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:35,905 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2024-10-31 21:58:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:35,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2024-10-31 21:58:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:35,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2024-10-31 21:58:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:58:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2024-10-31 21:58:35,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:58:35,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417930021] [2024-10-31 21:58:35,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417930021] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:58:35,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182582142] [2024-10-31 21:58:35,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 21:58:35,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:58:35,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:58:35,962 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:58:35,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-31 21:58:37,629 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-10-31 21:58:37,629 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:58:37,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 21:58:37,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:58:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2024-10-31 21:58:38,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:58:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2024-10-31 21:58:39,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182582142] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:58:39,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:58:39,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 17, 17] total 95 [2024-10-31 21:58:39,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134696538] [2024-10-31 21:58:39,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:58:39,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-10-31 21:58:39,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:58:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-10-31 21:58:39,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2024-10-31 21:58:39,313 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 95 states, 95 states have (on average 2.2736842105263158) internal successors, (216), 95 states have internal predecessors, (216), 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) [2024-10-31 21:58:39,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:58:39,819 INFO L93 Difference]: Finished difference Result 308 states and 335 transitions. [2024-10-31 21:58:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-10-31 21:58:39,821 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.2736842105263158) internal successors, (216), 95 states have internal predecessors, (216), 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 265 [2024-10-31 21:58:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:58:39,824 INFO L225 Difference]: With dead ends: 308 [2024-10-31 21:58:39,828 INFO L226 Difference]: Without dead ends: 235 [2024-10-31 21:58:39,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2024-10-31 21:58:39,832 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 21:58:39,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 312 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 21:58:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-10-31 21:58:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2024-10-31 21:58:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.0131004366812226) internal successors, (232), 229 states have internal predecessors, (232), 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) [2024-10-31 21:58:39,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 238 transitions. [2024-10-31 21:58:39,862 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 238 transitions. Word has length 265 [2024-10-31 21:58:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:58:39,863 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 238 transitions. [2024-10-31 21:58:39,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.2736842105263158) internal successors, (216), 95 states have internal predecessors, (216), 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) [2024-10-31 21:58:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 238 transitions. [2024-10-31 21:58:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2024-10-31 21:58:39,872 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:58:39,872 INFO L215 NwaCegarLoop]: trace histogram [90, 90, 63, 63, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:58:39,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-31 21:58:40,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5391c05b-c885-419a-acb5-9976cf26c01a/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 21:58:40,076 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:58:40,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:58:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1465058432, now seen corresponding path program 10 times [2024-10-31 21:58:40,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:58:40,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059614118] [2024-10-31 21:58:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:58:40,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:58:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat