./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_find_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_find_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 104899a801011b0e3641a72d1ef00a1787a9f1724318580031d49da34b73c0d4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:46:38,894 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:46:38,962 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:46:38,968 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:46:38,969 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:46:38,992 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:46:38,993 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:46:38,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:46:38,994 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:46:38,995 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:46:38,995 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:46:38,996 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:46:38,997 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:46:38,997 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:46:38,998 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:46:38,998 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:46:38,999 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:46:38,999 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:46:39,000 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:46:39,000 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:46:39,001 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:46:39,003 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:46:39,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:46:39,004 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:46:39,004 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:46:39,005 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:46:39,005 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:46:39,006 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:46:39,006 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:46:39,006 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:46:39,007 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:46:39,007 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:46:39,008 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:46:39,008 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:46:39,008 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:46:39,008 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:46:39,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:46:39,009 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:46:39,009 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:46:39,009 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:46:39,009 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:46:39,010 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:46:39,010 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_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 104899a801011b0e3641a72d1ef00a1787a9f1724318580031d49da34b73c0d4 [2023-11-29 04:46:39,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:46:39,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:46:39,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:46:39,256 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:46:39,257 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:46:39,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-examples/standard_find_ground-1.i [2023-11-29 04:46:41,999 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:46:42,149 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:46:42,150 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/sv-benchmarks/c/array-examples/standard_find_ground-1.i [2023-11-29 04:46:42,156 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/data/50884504e/3f8cea917b484e0ab0280b75766631b2/FLAG80b6145e4 [2023-11-29 04:46:42,169 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/data/50884504e/3f8cea917b484e0ab0280b75766631b2 [2023-11-29 04:46:42,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:46:42,172 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:46:42,174 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:46:42,174 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:46:42,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:46:42,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,181 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a877ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42, skipping insertion in model container [2023-11-29 04:46:42,181 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,203 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:46:42,341 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/sv-benchmarks/c/array-examples/standard_find_ground-1.i[855,868] [2023-11-29 04:46:42,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:46:42,362 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:46:42,372 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/sv-benchmarks/c/array-examples/standard_find_ground-1.i[855,868] [2023-11-29 04:46:42,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:46:42,389 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:46:42,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42 WrapperNode [2023-11-29 04:46:42,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:46:42,391 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:46:42,391 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:46:42,391 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:46:42,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,402 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,418 INFO L138 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2023-11-29 04:46:42,419 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:46:42,419 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:46:42,419 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:46:42,419 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:46:42,427 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,429 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,441 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-29 04:46:42,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,442 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,446 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,450 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,451 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,452 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,454 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:46:42,455 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:46:42,455 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:46:42,456 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:46:42,457 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (1/1) ... [2023-11-29 04:46:42,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:46:42,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:42,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:46:42,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:46:42,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:46:42,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:46:42,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:46:42,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:46:42,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:46:42,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:46:42,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:46:42,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:46:42,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:46:42,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:46:42,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:46:42,589 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:46:42,591 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:46:42,712 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:46:42,743 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:46:42,744 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 04:46:42,744 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:46:42 BoogieIcfgContainer [2023-11-29 04:46:42,744 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:46:42,746 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:46:42,747 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:46:42,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:46:42,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:46:42" (1/3) ... [2023-11-29 04:46:42,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2544f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:46:42, skipping insertion in model container [2023-11-29 04:46:42,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:42" (2/3) ... [2023-11-29 04:46:42,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2544f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:46:42, skipping insertion in model container [2023-11-29 04:46:42,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:46:42" (3/3) ... [2023-11-29 04:46:42,751 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_find_ground-1.i [2023-11-29 04:46:42,767 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:46:42,767 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:46:42,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:46:42,817 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5414cbf3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:46:42,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:46:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 04:46:42,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:42,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:42,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:42,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:42,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2080607968, now seen corresponding path program 1 times [2023-11-29 04:46:42,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:42,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013751517] [2023-11-29 04:46:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:42,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:43,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:43,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013751517] [2023-11-29 04:46:43,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013751517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:46:43,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:46:43,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:46:43,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600672808] [2023-11-29 04:46:43,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:46:43,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 04:46:43,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:43,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 04:46:43,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:46:43,061 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:43,086 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2023-11-29 04:46:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 04:46:43,089 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-29 04:46:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:43,096 INFO L225 Difference]: With dead ends: 24 [2023-11-29 04:46:43,096 INFO L226 Difference]: Without dead ends: 11 [2023-11-29 04:46:43,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:46:43,103 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:43,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:43,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-29 04:46:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-29 04:46:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2023-11-29 04:46:43,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2023-11-29 04:46:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:43,137 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2023-11-29 04:46:43,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2023-11-29 04:46:43,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 04:46:43,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:43,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:43,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:46:43,139 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:43,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:43,140 INFO L85 PathProgramCache]: Analyzing trace with hash -999958823, now seen corresponding path program 1 times [2023-11-29 04:46:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:43,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661227663] [2023-11-29 04:46:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:43,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:43,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:43,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:43,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661227663] [2023-11-29 04:46:43,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661227663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:46:43,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:46:43,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:46:43,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815547274] [2023-11-29 04:46:43,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:46:43,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:46:43,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:43,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:46:43,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:46:43,228 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:43,241 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2023-11-29 04:46:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:46:43,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 04:46:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:43,243 INFO L225 Difference]: With dead ends: 21 [2023-11-29 04:46:43,243 INFO L226 Difference]: Without dead ends: 12 [2023-11-29 04:46:43,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:46:43,245 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:43,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-29 04:46:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-29 04:46:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-11-29 04:46:43,250 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2023-11-29 04:46:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:43,251 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-11-29 04:46:43,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-11-29 04:46:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 04:46:43,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:43,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:43,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:46:43,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:43,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:43,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1071725599, now seen corresponding path program 1 times [2023-11-29 04:46:43,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:43,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211052190] [2023-11-29 04:46:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:43,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:43,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:43,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211052190] [2023-11-29 04:46:43,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211052190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:43,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061459556] [2023-11-29 04:46:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:43,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:43,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:43,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:43,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:46:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:43,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:46:43,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:43,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:46:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:43,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061459556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:46:43,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:46:43,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 04:46:43,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592329873] [2023-11-29 04:46:43,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:46:43,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:46:43,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:46:43,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:46:43,479 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:43,505 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2023-11-29 04:46:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:46:43,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 04:46:43,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:43,506 INFO L225 Difference]: With dead ends: 24 [2023-11-29 04:46:43,506 INFO L226 Difference]: Without dead ends: 15 [2023-11-29 04:46:43,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:46:43,508 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:43,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:43,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-29 04:46:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-29 04:46:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-29 04:46:43,513 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2023-11-29 04:46:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:43,514 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-29 04:46:43,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-29 04:46:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 04:46:43,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:43,515 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:43,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:46:43,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:43,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:43,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:43,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2058877017, now seen corresponding path program 2 times [2023-11-29 04:46:43,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:43,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986740543] [2023-11-29 04:46:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:43,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:46:43,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:43,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986740543] [2023-11-29 04:46:43,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986740543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:46:43,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:46:43,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:46:43,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365785378] [2023-11-29 04:46:43,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:46:43,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:46:43,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:43,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:46:43,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:46:43,837 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:43,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:43,862 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-11-29 04:46:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:46:43,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-29 04:46:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:43,863 INFO L225 Difference]: With dead ends: 25 [2023-11-29 04:46:43,863 INFO L226 Difference]: Without dead ends: 18 [2023-11-29 04:46:43,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:46:43,865 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:43,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:43,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-29 04:46:43,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-29 04:46:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-29 04:46:43,872 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2023-11-29 04:46:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:43,872 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-29 04:46:43,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-29 04:46:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 04:46:43,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:43,873 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:43,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 04:46:43,874 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:43,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2046598258, now seen corresponding path program 1 times [2023-11-29 04:46:43,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:43,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811923042] [2023-11-29 04:46:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:43,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:46:44,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:44,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811923042] [2023-11-29 04:46:44,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811923042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:44,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812399207] [2023-11-29 04:46:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:44,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:44,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:44,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:44,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:46:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:44,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:46:44,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:46:44,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:46:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:46:44,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812399207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:46:44,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:46:44,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 04:46:44,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687977065] [2023-11-29 04:46:44,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:46:44,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 04:46:44,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:44,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 04:46:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:46:44,174 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:44,200 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2023-11-29 04:46:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:46:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-29 04:46:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:44,201 INFO L225 Difference]: With dead ends: 36 [2023-11-29 04:46:44,202 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 04:46:44,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:46:44,203 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:44,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 04:46:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-29 04:46:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-29 04:46:44,211 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2023-11-29 04:46:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:44,211 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-29 04:46:44,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-29 04:46:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 04:46:44,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:44,213 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:44,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:46:44,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:44,419 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:44,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:44,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1449121230, now seen corresponding path program 2 times [2023-11-29 04:46:44,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:44,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539721089] [2023-11-29 04:46:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:44,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:46:44,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:44,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539721089] [2023-11-29 04:46:44,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539721089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:44,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581841224] [2023-11-29 04:46:44,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:46:44,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:44,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:44,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:44,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:46:44,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:46:44,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:46:44,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:46:44,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:46:44,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:46:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:46:45,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581841224] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:46:45,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:46:45,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-29 04:46:45,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449430620] [2023-11-29 04:46:45,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:46:45,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 04:46:45,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 04:46:45,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:46:45,042 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:45,085 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2023-11-29 04:46:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 04:46:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 04:46:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:45,086 INFO L225 Difference]: With dead ends: 48 [2023-11-29 04:46:45,087 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 04:46:45,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:46:45,088 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:45,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 04:46:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-29 04:46:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-29 04:46:45,097 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2023-11-29 04:46:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:45,097 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-29 04:46:45,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-29 04:46:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 04:46:45,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:45,099 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:45,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:46:45,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 04:46:45,300 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:45,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:45,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1370532430, now seen corresponding path program 3 times [2023-11-29 04:46:45,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:45,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588660270] [2023-11-29 04:46:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:45,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:46:45,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:45,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588660270] [2023-11-29 04:46:45,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588660270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:45,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490909751] [2023-11-29 04:46:45,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:46:45,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:45,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:45,870 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:45,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:46:45,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:46:45,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:46:45,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 04:46:45,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-29 04:46:46,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:46:46,385 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:46:46,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 04:46:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-29 04:46:46,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490909751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:46:46,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:46:46,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 34 [2023-11-29 04:46:46,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664106280] [2023-11-29 04:46:46,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:46:46,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 04:46:46,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:46,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 04:46:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 04:46:46,453 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:47,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:47,163 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-11-29 04:46:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 04:46:47,163 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-29 04:46:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:47,164 INFO L225 Difference]: With dead ends: 53 [2023-11-29 04:46:47,165 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 04:46:47,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=979, Invalid=2803, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 04:46:47,168 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:47,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 106 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:46:47,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 04:46:47,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2023-11-29 04:46:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-11-29 04:46:47,177 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 34 [2023-11-29 04:46:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:47,178 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-11-29 04:46:47,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-11-29 04:46:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 04:46:47,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:47,179 INFO L195 NwaCegarLoop]: trace histogram [23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:47,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:46:47,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 04:46:47,384 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:47,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:47,385 INFO L85 PathProgramCache]: Analyzing trace with hash 948903123, now seen corresponding path program 1 times [2023-11-29 04:46:47,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:47,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120426821] [2023-11-29 04:46:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:47,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:46:47,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:47,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120426821] [2023-11-29 04:46:47,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120426821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:47,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469450649] [2023-11-29 04:46:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:47,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:47,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:47,992 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:47,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:46:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:48,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 04:46:48,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:46:48,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:46:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:46:48,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469450649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:46:48,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:46:48,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-11-29 04:46:48,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426736154] [2023-11-29 04:46:48,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:46:48,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 04:46:48,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:48,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 04:46:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 04:46:48,947 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:49,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:49,036 INFO L93 Difference]: Finished difference Result 78 states and 110 transitions. [2023-11-29 04:46:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 04:46:49,037 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-29 04:46:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:49,038 INFO L225 Difference]: With dead ends: 78 [2023-11-29 04:46:49,038 INFO L226 Difference]: Without dead ends: 64 [2023-11-29 04:46:49,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 04:46:49,040 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:49,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:46:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-29 04:46:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-29 04:46:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2023-11-29 04:46:49,051 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 38 [2023-11-29 04:46:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:49,051 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2023-11-29 04:46:49,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2023-11-29 04:46:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 04:46:49,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:49,054 INFO L195 NwaCegarLoop]: trace histogram [48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:49,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:46:49,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:49,260 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:49,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:49,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1608027725, now seen corresponding path program 2 times [2023-11-29 04:46:49,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:49,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106575491] [2023-11-29 04:46:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:49,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:46:50,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:50,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106575491] [2023-11-29 04:46:50,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106575491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:50,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422297074] [2023-11-29 04:46:50,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:46:50,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:50,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:50,995 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:50,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:46:51,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:46:51,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:46:51,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 04:46:51,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:46:51,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:46:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:46:53,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422297074] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:46:53,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:46:53,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-11-29 04:46:53,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795916615] [2023-11-29 04:46:53,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:46:53,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-29 04:46:53,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-29 04:46:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 04:46:53,655 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 101 states, 101 states have (on average 1.108910891089109) internal successors, (112), 100 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:53,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:53,812 INFO L93 Difference]: Finished difference Result 128 states and 185 transitions. [2023-11-29 04:46:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-29 04:46:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.108910891089109) internal successors, (112), 100 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-29 04:46:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:53,814 INFO L225 Difference]: With dead ends: 128 [2023-11-29 04:46:53,814 INFO L226 Difference]: Without dead ends: 114 [2023-11-29 04:46:53,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 04:46:53,819 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:53,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:46:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-29 04:46:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-11-29 04:46:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 113 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2023-11-29 04:46:53,835 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 63 [2023-11-29 04:46:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:53,836 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2023-11-29 04:46:53,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.108910891089109) internal successors, (112), 100 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2023-11-29 04:46:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-29 04:46:53,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:53,841 INFO L195 NwaCegarLoop]: trace histogram [98, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:53,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:46:54,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:54,042 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:54,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:54,042 INFO L85 PathProgramCache]: Analyzing trace with hash 392771853, now seen corresponding path program 3 times [2023-11-29 04:46:54,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:54,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081253609] [2023-11-29 04:46:54,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:54,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4856 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:46:59,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:59,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081253609] [2023-11-29 04:46:59,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081253609] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:59,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173399227] [2023-11-29 04:46:59,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:46:59,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:59,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:59,366 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:59,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:46:59,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:46:59,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:46:59,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:46:59,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4856 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-11-29 04:46:59,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:47:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4856 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-11-29 04:47:00,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173399227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:47:00,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:47:00,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 5, 5] total 106 [2023-11-29 04:47:00,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327229578] [2023-11-29 04:47:00,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:47:00,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-11-29 04:47:00,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:47:00,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-11-29 04:47:00,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6272, Unknown=0, NotChecked=0, Total=11342 [2023-11-29 04:47:00,077 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 107 states, 107 states have (on average 1.205607476635514) internal successors, (129), 106 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:47:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:47:04,463 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2023-11-29 04:47:04,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-11-29 04:47:04,464 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.205607476635514) internal successors, (129), 106 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2023-11-29 04:47:04,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:47:04,465 INFO L225 Difference]: With dead ends: 137 [2023-11-29 04:47:04,465 INFO L226 Difference]: Without dead ends: 118 [2023-11-29 04:47:04,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5746 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=15267, Invalid=26963, Unknown=0, NotChecked=0, Total=42230 [2023-11-29 04:47:04,474 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:47:04,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:47:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-29 04:47:04,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-11-29 04:47:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0512820512820513) internal successors, (123), 117 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:47:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 123 transitions. [2023-11-29 04:47:04,492 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 123 transitions. Word has length 113 [2023-11-29 04:47:04,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:47:04,492 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 123 transitions. [2023-11-29 04:47:04,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.205607476635514) internal successors, (129), 106 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:47:04,492 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 123 transitions. [2023-11-29 04:47:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-29 04:47:04,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:47:04,494 INFO L195 NwaCegarLoop]: trace histogram [99, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:47:04,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 04:47:04,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:47:04,695 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:47:04,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:47:04,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1968905504, now seen corresponding path program 4 times [2023-11-29 04:47:04,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:47:04,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533670060] [2023-11-29 04:47:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:47:04,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:47:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:47:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 04:47:09,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:47:09,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533670060] [2023-11-29 04:47:09,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533670060] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:47:09,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747631272] [2023-11-29 04:47:09,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:47:09,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:47:09,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:47:09,854 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:47:09,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:47:10,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:47:10,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:47:10,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 101 conjunts are in the unsatisfiable core [2023-11-29 04:47:10,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:47:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 04:47:10,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:47:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 04:47:19,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747631272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:47:19,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:47:19,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2023-11-29 04:47:19,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522311743] [2023-11-29 04:47:19,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:47:19,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-11-29 04:47:19,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:47:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-11-29 04:47:19,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-11-29 04:47:19,689 INFO L87 Difference]: Start difference. First operand 118 states and 123 transitions. Second operand has 203 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 202 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:47:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:47:20,125 INFO L93 Difference]: Finished difference Result 236 states and 346 transitions. [2023-11-29 04:47:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-11-29 04:47:20,126 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 202 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-11-29 04:47:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:47:20,128 INFO L225 Difference]: With dead ends: 236 [2023-11-29 04:47:20,128 INFO L226 Difference]: Without dead ends: 219 [2023-11-29 04:47:20,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-11-29 04:47:20,132 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:47:20,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:47:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-29 04:47:20,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-11-29 04:47:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0275229357798166) internal successors, (224), 218 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:47:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 224 transitions. [2023-11-29 04:47:20,159 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 224 transitions. Word has length 117 [2023-11-29 04:47:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:47:20,159 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 224 transitions. [2023-11-29 04:47:20,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0541871921182266) internal successors, (214), 202 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:47:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 224 transitions. [2023-11-29 04:47:20,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-29 04:47:20,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:47:20,163 INFO L195 NwaCegarLoop]: trace histogram [200, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:47:20,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:47:20,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:47:20,364 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:47:20,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:47:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash -774409818, now seen corresponding path program 5 times [2023-11-29 04:47:20,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:47:20,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741204448] [2023-11-29 04:47:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:47:20,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:47:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:47:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20111 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 04:47:40,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:47:40,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741204448] [2023-11-29 04:47:40,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741204448] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:47:40,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771235343] [2023-11-29 04:47:40,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:47:40,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:47:40,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:47:40,920 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:47:40,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d7d33bc-983e-40e9-a05f-7cf05035ceb6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process