./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/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_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/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_abe73351-84f6-49ce-a3ee-64a2b8298475/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 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:36:29,368 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:36:29,444 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:36:29,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:36:29,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:36:29,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:36:29,474 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:36:29,475 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:36:29,476 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:36:29,476 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:36:29,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:36:29,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:36:29,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:36:29,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:36:29,479 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:36:29,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:36:29,480 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:36:29,480 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:36:29,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:36:29,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:36:29,482 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:36:29,482 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:36:29,483 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:36:29,483 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:36:29,484 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:36:29,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:36:29,484 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:36:29,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:36:29,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:36:29,486 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:36:29,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:36:29,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:36:29,487 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:36:29,487 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:36:29,487 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:36:29,488 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:36:29,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:36:29,488 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:36:29,488 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:36:29,488 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:36:29,489 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:36:29,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:36:29,489 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_abe73351-84f6-49ce-a3ee-64a2b8298475/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 [2023-11-29 04:36:29,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:36:29,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:36:29,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:36:29,747 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:36:29,747 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:36:29,748 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2023-11-29 04:36:32,491 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:36:32,642 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:36:32,643 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2023-11-29 04:36:32,649 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/data/ed47148ce/2d6ec6726e114d25a3ef29a305fb55c5/FLAG8a58971fc [2023-11-29 04:36:32,661 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/data/ed47148ce/2d6ec6726e114d25a3ef29a305fb55c5 [2023-11-29 04:36:32,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:36:32,665 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:36:32,666 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:36:32,666 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:36:32,671 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:36:32,672 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,673 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f01bd74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32, skipping insertion in model container [2023-11-29 04:36:32,673 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,695 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:36:32,835 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_abe73351-84f6-49ce-a3ee-64a2b8298475/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c[324,337] [2023-11-29 04:36:32,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:36:32,862 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:36:32,874 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_abe73351-84f6-49ce-a3ee-64a2b8298475/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c[324,337] [2023-11-29 04:36:32,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:36:32,896 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:36:32,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32 WrapperNode [2023-11-29 04:36:32,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:36:32,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:36:32,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:36:32,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:36:32,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,912 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,932 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-11-29 04:36:32,933 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:36:32,934 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:36:32,934 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:36:32,934 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:36:32,945 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,947 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,961 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2023-11-29 04:36:32,961 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,961 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,966 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,969 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,971 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,971 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,973 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:36:32,974 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:36:32,974 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:36:32,974 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:36:32,975 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (1/1) ... [2023-11-29 04:36:32,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:36:32,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:33,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:36:33,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:36:33,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:36:33,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:36:33,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:36:33,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:36:33,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:36:33,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:36:33,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:36:33,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:36:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:36:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:36:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:36:33,115 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:36:33,117 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:36:33,252 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:36:33,284 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:36:33,284 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 04:36:33,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:36:33 BoogieIcfgContainer [2023-11-29 04:36:33,284 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:36:33,287 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:36:33,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:36:33,291 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:36:33,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:36:32" (1/3) ... [2023-11-29 04:36:33,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6935e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:36:33, skipping insertion in model container [2023-11-29 04:36:33,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:32" (2/3) ... [2023-11-29 04:36:33,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6935e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:36:33, skipping insertion in model container [2023-11-29 04:36:33,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:36:33" (3/3) ... [2023-11-29 04:36:33,294 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2023-11-29 04:36:33,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:36:33,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:36:33,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:36:33,359 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;@37e471b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:36:33,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:36:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 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 04:36:33,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 04:36:33,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:33,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:33,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:33,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:33,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1901142431, now seen corresponding path program 1 times [2023-11-29 04:36:33,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:33,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128389647] [2023-11-29 04:36:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:33,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:33,597 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 04:36:33,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:33,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128389647] [2023-11-29 04:36:33,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128389647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:36:33,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:36:33,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:36:33,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337182745] [2023-11-29 04:36:33,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:36:33,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:36:33,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:33,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:36:33,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:36:33,630 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 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) 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 04:36:33,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:33,669 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2023-11-29 04:36:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:36:33,672 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 04:36:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:33,677 INFO L225 Difference]: With dead ends: 33 [2023-11-29 04:36:33,678 INFO L226 Difference]: Without dead ends: 15 [2023-11-29 04:36:33,680 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 04:36:33,684 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:33,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:36:33,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-29 04:36:33,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-29 04:36:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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 04:36:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2023-11-29 04:36:33,709 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2023-11-29 04:36:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:33,710 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2023-11-29 04:36:33,710 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 04:36:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2023-11-29 04:36:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 04:36:33,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:33,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:33,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:36:33,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:33,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:33,712 INFO L85 PathProgramCache]: Analyzing trace with hash -37017485, now seen corresponding path program 1 times [2023-11-29 04:36:33,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:33,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516682150] [2023-11-29 04:36:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:33,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:36:33,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:33,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516682150] [2023-11-29 04:36:33,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516682150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:36:33,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:36:33,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:36:33,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785457516] [2023-11-29 04:36:33,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:36:33,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:36:33,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:33,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:36:33,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:36:33,838 INFO L87 Difference]: Start difference. First operand 15 states and 20 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 04:36:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:33,883 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2023-11-29 04:36:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:36:33,884 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 10 [2023-11-29 04:36:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:33,885 INFO L225 Difference]: With dead ends: 31 [2023-11-29 04:36:33,886 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 04:36:33,886 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 04:36:33,888 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:33,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:36:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 04:36:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-11-29 04:36:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 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 04:36:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-11-29 04:36:33,895 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 10 [2023-11-29 04:36:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:33,896 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-11-29 04:36:33,896 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 04:36:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-11-29 04:36:33,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 04:36:33,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:33,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:33,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:36:33,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:33,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:33,898 INFO L85 PathProgramCache]: Analyzing trace with hash -851183943, now seen corresponding path program 1 times [2023-11-29 04:36:33,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:33,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024018577] [2023-11-29 04:36:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:33,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:36:33,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:33,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024018577] [2023-11-29 04:36:33,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024018577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:36:33,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:36:33,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:36:33,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775282500] [2023-11-29 04:36:33,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:36:33,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:36:33,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:33,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:36:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:36:33,992 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:36:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:34,011 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2023-11-29 04:36:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:36:34,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-29 04:36:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:34,013 INFO L225 Difference]: With dead ends: 28 [2023-11-29 04:36:34,013 INFO L226 Difference]: Without dead ends: 17 [2023-11-29 04:36:34,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 04:36:34,015 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:34,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:36:34,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-29 04:36:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-29 04:36:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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 04:36:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-29 04:36:34,020 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2023-11-29 04:36:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:34,021 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-29 04:36:34,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:36:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-29 04:36:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 04:36:34,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:34,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:34,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 04:36:34,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:34,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:34,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1058582699, now seen corresponding path program 1 times [2023-11-29 04:36:34,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:34,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326883585] [2023-11-29 04:36:34,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:34,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:36:34,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:34,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326883585] [2023-11-29 04:36:34,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326883585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:34,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917650913] [2023-11-29 04:36:34,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:34,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:34,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:34,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:34,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:36:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:34,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:36:34,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:36:34,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:36:34,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917650913] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:34,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:34,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-11-29 04:36:34,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537418487] [2023-11-29 04:36:34,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:34,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:36:34,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:34,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:36:34,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:36:34,296 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 04:36:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:34,465 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2023-11-29 04:36:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:36:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 14 [2023-11-29 04:36:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:34,466 INFO L225 Difference]: With dead ends: 70 [2023-11-29 04:36:34,466 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 04:36:34,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:36:34,468 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 70 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:34,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 33 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 04:36:34,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 28. [2023-11-29 04:36:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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 04:36:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-29 04:36:34,479 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 14 [2023-11-29 04:36:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:34,479 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-29 04:36:34,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 04:36:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-29 04:36:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 04:36:34,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:34,480 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:34,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:36:34,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:34,684 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:34,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:34,684 INFO L85 PathProgramCache]: Analyzing trace with hash 159487876, now seen corresponding path program 1 times [2023-11-29 04:36:34,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:34,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849192746] [2023-11-29 04:36:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 04:36:34,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:34,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849192746] [2023-11-29 04:36:34,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849192746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:34,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184660597] [2023-11-29 04:36:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:34,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:34,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:34,797 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:34,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:36:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:34,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:36:34,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:36:34,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:36:35,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184660597] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:35,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:35,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-11-29 04:36:35,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377228894] [2023-11-29 04:36:35,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:35,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 04:36:35,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:35,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 04:36:35,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:36:35,040 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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 04:36:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:35,212 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2023-11-29 04:36:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:36:35,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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 20 [2023-11-29 04:36:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:35,213 INFO L225 Difference]: With dead ends: 67 [2023-11-29 04:36:35,214 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 04:36:35,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-11-29 04:36:35,215 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:35,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 04:36:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2023-11-29 04:36:35,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:36:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-29 04:36:35,223 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2023-11-29 04:36:35,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:35,224 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-29 04:36:35,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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 04:36:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-29 04:36:35,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 04:36:35,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:35,225 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:35,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:36:35,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:35,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:35,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:35,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2060541314, now seen corresponding path program 1 times [2023-11-29 04:36:35,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:35,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740395507] [2023-11-29 04:36:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:35,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:36:35,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:35,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740395507] [2023-11-29 04:36:35,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740395507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:35,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26051403] [2023-11-29 04:36:35,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:35,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:35,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:35,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:35,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:36:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:35,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 04:36:35,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:36:35,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:36:36,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26051403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:36,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:36,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-11-29 04:36:36,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198249042] [2023-11-29 04:36:36,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:36,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 04:36:36,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:36,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 04:36:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 04:36:36,231 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 34 states have internal predecessors, (48), 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 04:36:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:36,316 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2023-11-29 04:36:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 04:36:36,317 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 34 states have internal predecessors, (48), 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 26 [2023-11-29 04:36:36,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:36,318 INFO L225 Difference]: With dead ends: 63 [2023-11-29 04:36:36,318 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 04:36:36,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 04:36:36,320 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:36,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:36,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 04:36:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2023-11-29 04:36:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 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 04:36:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-11-29 04:36:36,329 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 26 [2023-11-29 04:36:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:36,330 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-11-29 04:36:36,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 34 states have internal predecessors, (48), 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 04:36:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-11-29 04:36:36,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 04:36:36,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:36,331 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:36,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:36:36,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 04:36:36,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:36,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:36,536 INFO L85 PathProgramCache]: Analyzing trace with hash -278712638, now seen corresponding path program 2 times [2023-11-29 04:36:36,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:36,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830312891] [2023-11-29 04:36:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:36,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:36:37,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:37,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830312891] [2023-11-29 04:36:37,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830312891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:37,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257190731] [2023-11-29 04:36:37,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:36:37,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:37,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:37,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:37,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:36:37,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:36:37,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:36:37,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 04:36:37,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:36:37,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:36:38,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257190731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:38,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:38,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2023-11-29 04:36:38,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543908542] [2023-11-29 04:36:38,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:38,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 04:36:38,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:38,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 04:36:38,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2254, Invalid=2716, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 04:36:38,684 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 71 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 70 states have internal predecessors, (84), 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 04:36:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:38,822 INFO L93 Difference]: Finished difference Result 87 states and 117 transitions. [2023-11-29 04:36:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 04:36:38,823 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 70 states have internal predecessors, (84), 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 04:36:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:38,824 INFO L225 Difference]: With dead ends: 87 [2023-11-29 04:36:38,824 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 04:36:38,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2254, Invalid=2716, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 04:36:38,827 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:38,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 88 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 04:36:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2023-11-29 04:36:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 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 04:36:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2023-11-29 04:36:38,840 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 38 [2023-11-29 04:36:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:38,841 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2023-11-29 04:36:38,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 70 states have internal predecessors, (84), 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 04:36:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2023-11-29 04:36:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 04:36:38,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:38,843 INFO L195 NwaCegarLoop]: trace histogram [46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:38,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:36:39,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 04:36:39,047 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:39,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:39,048 INFO L85 PathProgramCache]: Analyzing trace with hash 939995458, now seen corresponding path program 3 times [2023-11-29 04:36:39,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:39,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961806673] [2023-11-29 04:36:39,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:39,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:36:40,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:40,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961806673] [2023-11-29 04:36:40,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961806673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:40,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279936385] [2023-11-29 04:36:40,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:36:40,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:40,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:40,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:40,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:36:41,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:36:41,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:36:41,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:36:41,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-11-29 04:36:41,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-11-29 04:36:41,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279936385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:41,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:41,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 5, 5] total 56 [2023-11-29 04:36:41,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747762777] [2023-11-29 04:36:41,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:41,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 04:36:41,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:41,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 04:36:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1396, Invalid=1796, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 04:36:41,407 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 57 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 56 states have internal predecessors, (86), 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 04:36:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:46,500 INFO L93 Difference]: Finished difference Result 435 states and 542 transitions. [2023-11-29 04:36:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-11-29 04:36:46,500 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 56 states have internal predecessors, (86), 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 62 [2023-11-29 04:36:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:46,504 INFO L225 Difference]: With dead ends: 435 [2023-11-29 04:36:46,504 INFO L226 Difference]: Without dead ends: 419 [2023-11-29 04:36:46,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10609 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=12550, Invalid=27250, Unknown=0, NotChecked=0, Total=39800 [2023-11-29 04:36:46,516 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 979 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:46,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 118 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:36:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-29 04:36:46,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 265. [2023-11-29 04:36:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.196969696969697) internal successors, (316), 264 states have internal predecessors, (316), 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 04:36:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 316 transitions. [2023-11-29 04:36:46,571 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 316 transitions. Word has length 62 [2023-11-29 04:36:46,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:46,572 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 316 transitions. [2023-11-29 04:36:46,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 56 states have internal predecessors, (86), 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 04:36:46,572 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 316 transitions. [2023-11-29 04:36:46,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 04:36:46,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:46,574 INFO L195 NwaCegarLoop]: trace histogram [49, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:46,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:36:46,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 04:36:46,775 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:46,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:46,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2082833861, now seen corresponding path program 1 times [2023-11-29 04:36:46,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:46,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447519872] [2023-11-29 04:36:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:46,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 04:36:48,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:48,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447519872] [2023-11-29 04:36:48,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447519872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:48,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120507142] [2023-11-29 04:36:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:48,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:48,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:48,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:48,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:36:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:48,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 04:36:48,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 04:36:50,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 04:36:52,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120507142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:52,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:52,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 151 [2023-11-29 04:36:52,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95765490] [2023-11-29 04:36:52,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:52,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2023-11-29 04:36:52,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:52,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2023-11-29 04:36:52,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10300, Invalid=12652, Unknown=0, NotChecked=0, Total=22952 [2023-11-29 04:36:52,822 INFO L87 Difference]: Start difference. First operand 265 states and 316 transitions. Second operand has 152 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 151 states have internal predecessors, (166), 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 04:36:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:53,062 INFO L93 Difference]: Finished difference Result 538 states and 691 transitions. [2023-11-29 04:36:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-11-29 04:36:53,063 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 151 states have internal predecessors, (166), 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 69 [2023-11-29 04:36:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:53,065 INFO L225 Difference]: With dead ends: 538 [2023-11-29 04:36:53,065 INFO L226 Difference]: Without dead ends: 324 [2023-11-29 04:36:53,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9848 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=10300, Invalid=12652, Unknown=0, NotChecked=0, Total=22952 [2023-11-29 04:36:53,069 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:53,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:53,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-29 04:36:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 316. [2023-11-29 04:36:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.1650793650793652) internal successors, (367), 315 states have internal predecessors, (367), 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 04:36:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 367 transitions. [2023-11-29 04:36:53,117 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 367 transitions. Word has length 69 [2023-11-29 04:36:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:53,117 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 367 transitions. [2023-11-29 04:36:53,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 151 states have internal predecessors, (166), 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 04:36:53,118 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 367 transitions. [2023-11-29 04:36:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-29 04:36:53,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:53,120 INFO L195 NwaCegarLoop]: trace histogram [100, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:53,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:36:53,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:53,320 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:53,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:53,321 INFO L85 PathProgramCache]: Analyzing trace with hash -314447804, now seen corresponding path program 2 times [2023-11-29 04:36:53,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:53,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340155175] [2023-11-29 04:36:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:53,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 04:36:59,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340155175] [2023-11-29 04:36:59,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340155175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887422175] [2023-11-29 04:36:59,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:36:59,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:59,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:59,793 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:59,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:37:00,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:37:00,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:37:00,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 103 conjunts are in the unsatisfiable core [2023-11-29 04:37:00,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 04:37:04,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 04:37:15,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887422175] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:37:15,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:37:15,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 304 [2023-11-29 04:37:15,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945705796] [2023-11-29 04:37:15,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:15,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 305 states [2023-11-29 04:37:15,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:37:15,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 305 interpolants. [2023-11-29 04:37:15,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41410, Invalid=51310, Unknown=0, NotChecked=0, Total=92720 [2023-11-29 04:37:15,820 INFO L87 Difference]: Start difference. First operand 316 states and 367 transitions. Second operand has 305 states, 305 states have (on average 1.0459016393442624) internal successors, (319), 304 states have internal predecessors, (319), 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 04:37:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:37:16,672 INFO L93 Difference]: Finished difference Result 640 states and 844 transitions. [2023-11-29 04:37:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2023-11-29 04:37:16,672 INFO L78 Accepts]: Start accepts. Automaton has has 305 states, 305 states have (on average 1.0459016393442624) internal successors, (319), 304 states have internal predecessors, (319), 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 120 [2023-11-29 04:37:16,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:37:16,675 INFO L225 Difference]: With dead ends: 640 [2023-11-29 04:37:16,676 INFO L226 Difference]: Without dead ends: 426 [2023-11-29 04:37:16,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40499 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=41410, Invalid=51310, Unknown=0, NotChecked=0, Total=92720 [2023-11-29 04:37:16,683 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:37:16,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 70 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:37:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-11-29 04:37:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 418. [2023-11-29 04:37:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.1247002398081534) internal successors, (469), 417 states have internal predecessors, (469), 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 04:37:16,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 469 transitions. [2023-11-29 04:37:16,722 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 469 transitions. Word has length 120 [2023-11-29 04:37:16,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:37:16,723 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 469 transitions. [2023-11-29 04:37:16,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 305 states, 305 states have (on average 1.0459016393442624) internal successors, (319), 304 states have internal predecessors, (319), 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 04:37:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 469 transitions. [2023-11-29 04:37:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-11-29 04:37:16,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:37:16,728 INFO L195 NwaCegarLoop]: trace histogram [202, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:37:16,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:37:16,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:37:16,928 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:37:16,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2113666788, now seen corresponding path program 3 times [2023-11-29 04:37:16,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:37:16,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521562814] [2023-11-29 04:37:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:16,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:37:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:37:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20516 backedges. 0 proven. 20503 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 04:37:38,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:37:38,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521562814] [2023-11-29 04:37:38,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521562814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:37:38,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623434405] [2023-11-29 04:37:38,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:37:38,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:37:38,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:37:38,699 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:37:38,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:37:38,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:37:38,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:37:38,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 04:37:39,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:40,122 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-11-29 04:37:40,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2023-11-29 04:37:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20516 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 20506 trivial. 0 not checked. [2023-11-29 04:37:40,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:43,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-29 04:37:43,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:43,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 24 [2023-11-29 04:37:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20516 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20506 trivial. 0 not checked. [2023-11-29 04:37:44,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623434405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:37:44,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:37:44,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [204, 10, 10] total 222 [2023-11-29 04:37:44,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035579782] [2023-11-29 04:37:44,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:44,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 223 states [2023-11-29 04:37:44,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:37:44,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2023-11-29 04:37:44,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21398, Invalid=28108, Unknown=0, NotChecked=0, Total=49506 [2023-11-29 04:37:44,031 INFO L87 Difference]: Start difference. First operand 418 states and 469 transitions. Second operand has 223 states, 223 states have (on average 1.1345291479820627) internal successors, (253), 222 states have internal predecessors, (253), 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 04:39:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:39:47,209 INFO L93 Difference]: Finished difference Result 1720 states and 1982 transitions. [2023-11-29 04:39:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 625 states. [2023-11-29 04:39:47,210 INFO L78 Accepts]: Start accepts. Automaton has has 223 states, 223 states have (on average 1.1345291479820627) internal successors, (253), 222 states have internal predecessors, (253), 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 222 [2023-11-29 04:39:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:39:47,217 INFO L225 Difference]: With dead ends: 1720 [2023-11-29 04:39:47,217 INFO L226 Difference]: Without dead ends: 1506 [2023-11-29 04:39:47,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1264 GetRequests, 424 SyntacticMatches, 1 SemanticMatches, 839 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195048 ImplicationChecksByTransitivity, 96.4s TimeCoverageRelationStatistics Valid=213981, Invalid=492459, Unknown=0, NotChecked=0, Total=706440 [2023-11-29 04:39:47,283 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4440 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 2095 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4440 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2095 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:39:47,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4440 Valid, 102 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2095 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 04:39:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2023-11-29 04:39:47,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 426. [2023-11-29 04:39:47,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.1294117647058823) internal successors, (480), 425 states have internal predecessors, (480), 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 04:39:47,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 480 transitions. [2023-11-29 04:39:47,345 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 480 transitions. Word has length 222 [2023-11-29 04:39:47,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:39:47,346 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 480 transitions. [2023-11-29 04:39:47,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 223 states, 223 states have (on average 1.1345291479820627) internal successors, (253), 222 states have internal predecessors, (253), 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 04:39:47,346 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 480 transitions. [2023-11-29 04:39:47,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-11-29 04:39:47,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:39:47,348 INFO L195 NwaCegarLoop]: trace histogram [203, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:47,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:39:47,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:47,549 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:39:47,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:47,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1148532763, now seen corresponding path program 4 times [2023-11-29 04:39:47,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:39:47,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146812083] [2023-11-29 04:39:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:47,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:39:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20724 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 04:40:09,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:40:09,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146812083] [2023-11-29 04:40:09,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146812083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:40:09,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311355324] [2023-11-29 04:40:09,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:40:09,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:09,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:40:09,098 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:40:09,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:40:09,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:40:09,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:40:09,398 WARN L260 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 04:40:09,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:40:10,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:40:10,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 37 treesize of output 15 [2023-11-29 04:40:10,341 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-29 04:40:10,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2023-11-29 04:40:10,459 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-29 04:40:10,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2023-11-29 04:40:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20724 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 20706 trivial. 0 not checked. [2023-11-29 04:40:10,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:28,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 52 [2023-11-29 04:40:28,312 INFO L349 Elim1Store]: treesize reduction 5, result has 73.7 percent of original size [2023-11-29 04:40:28,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 351 treesize of output 235 [2023-11-29 04:40:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20724 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 20706 trivial. 0 not checked. [2023-11-29 04:40:28,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311355324] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:40:28,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:40:28,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [205, 15, 15] total 230 [2023-11-29 04:40:28,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667053263] [2023-11-29 04:40:28,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:40:28,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 230 states [2023-11-29 04:40:28,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:40:28,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2023-11-29 04:40:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21237, Invalid=31427, Unknown=6, NotChecked=0, Total=52670 [2023-11-29 04:40:28,376 INFO L87 Difference]: Start difference. First operand 426 states and 480 transitions. Second operand has 230 states, 230 states have (on average 1.117391304347826) internal successors, (257), 230 states have internal predecessors, (257), 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 04:40:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:40:35,792 INFO L93 Difference]: Finished difference Result 680 states and 793 transitions. [2023-11-29 04:40:35,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2023-11-29 04:40:35,792 INFO L78 Accepts]: Start accepts. Automaton has has 230 states, 230 states have (on average 1.117391304347826) internal successors, (257), 230 states have internal predecessors, (257), 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 225 [2023-11-29 04:40:35,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:40:35,795 INFO L225 Difference]: With dead ends: 680 [2023-11-29 04:40:35,795 INFO L226 Difference]: Without dead ends: 459 [2023-11-29 04:40:35,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5339 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=21739, Invalid=40505, Unknown=6, NotChecked=0, Total=62250 [2023-11-29 04:40:35,800 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 202 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 04:40:35,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 74 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 04:40:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-11-29 04:40:35,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 422. [2023-11-29 04:40:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.1235154394299287) internal successors, (473), 421 states have internal predecessors, (473), 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 04:40:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 473 transitions. [2023-11-29 04:40:35,872 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 473 transitions. Word has length 225 [2023-11-29 04:40:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:40:35,873 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 473 transitions. [2023-11-29 04:40:35,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 230 states, 230 states have (on average 1.117391304347826) internal successors, (257), 230 states have internal predecessors, (257), 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 04:40:35,873 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 473 transitions. [2023-11-29 04:40:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-11-29 04:40:35,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:40:35,875 INFO L195 NwaCegarLoop]: trace histogram [204, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:40:35,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:40:36,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:36,076 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:40:36,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:40:36,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1492300560, now seen corresponding path program 1 times [2023-11-29 04:40:36,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:40:36,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867234197] [2023-11-29 04:40:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:36,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:40:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20925 backedges. 0 proven. 20910 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:40:58,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:40:58,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867234197] [2023-11-29 04:40:58,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867234197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:40:58,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933174710] [2023-11-29 04:40:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:40:58,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:40:58,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:40:58,603 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:40:58,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:40:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:40:59,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 207 conjunts are in the unsatisfiable core [2023-11-29 04:40:59,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:41:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20925 backedges. 0 proven. 20910 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:41:16,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:42:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20925 backedges. 0 proven. 20910 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:42:05,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933174710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:42:05,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:42:05,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [206, 206, 206] total 616 [2023-11-29 04:42:05,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608702980] [2023-11-29 04:42:05,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:42:05,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 617 states [2023-11-29 04:42:05,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:42:05,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 617 interpolants. [2023-11-29 04:42:05,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169330, Invalid=210742, Unknown=0, NotChecked=0, Total=380072 [2023-11-29 04:42:05,072 INFO L87 Difference]: Start difference. First operand 422 states and 473 transitions. Second operand has 617 states, 617 states have (on average 1.0259319286871962) internal successors, (633), 616 states have internal predecessors, (633), 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 04:42:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:42:09,270 INFO L93 Difference]: Finished difference Result 854 states and 1162 transitions. [2023-11-29 04:42:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 412 states. [2023-11-29 04:42:09,271 INFO L78 Accepts]: Start accepts. Automaton has has 617 states, 617 states have (on average 1.0259319286871962) internal successors, (633), 616 states have internal predecessors, (633), 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 227 [2023-11-29 04:42:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:42:09,275 INFO L225 Difference]: With dead ends: 854 [2023-11-29 04:42:09,275 INFO L226 Difference]: Without dead ends: 638 [2023-11-29 04:42:09,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 615 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167483 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=169330, Invalid=210742, Unknown=0, NotChecked=0, Total=380072 [2023-11-29 04:42:09,298 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:42:09,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:42:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2023-11-29 04:42:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 628. [2023-11-29 04:42:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.0829346092503986) internal successors, (679), 627 states have internal predecessors, (679), 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 04:42:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 679 transitions. [2023-11-29 04:42:09,448 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 679 transitions. Word has length 227 [2023-11-29 04:42:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:42:09,448 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 679 transitions. [2023-11-29 04:42:09,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 617 states, 617 states have (on average 1.0259319286871962) internal successors, (633), 616 states have internal predecessors, (633), 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 04:42:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 679 transitions. [2023-11-29 04:42:09,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-11-29 04:42:09,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:42:09,452 INFO L195 NwaCegarLoop]: trace histogram [410, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:42:09,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 04:42:09,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:42:09,653 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:42:09,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:42:09,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1042469680, now seen corresponding path program 2 times [2023-11-29 04:42:09,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:42:09,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136445230] [2023-11-29 04:42:09,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:42:09,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:42:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 84270 backedges. 0 proven. 84255 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:43:47,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:43:47,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136445230] [2023-11-29 04:43:47,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136445230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:43:47,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105108374] [2023-11-29 04:43:47,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:43:47,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:43:47,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:43:47,079 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:43:47,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:43:48,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:43:48,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:43:48,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 3798 conjuncts, 413 conjunts are in the unsatisfiable core [2023-11-29 04:43:48,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:44:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 84270 backedges. 0 proven. 84255 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:44:56,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:48:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 84270 backedges. 0 proven. 84255 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:48:27,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105108374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:48:27,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:48:27,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [412, 412, 412] total 1234 [2023-11-29 04:48:27,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401485177] [2023-11-29 04:48:27,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:48:27,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 1235 states [2023-11-29 04:48:27,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:48:27,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1235 interpolants. [2023-11-29 04:48:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678150, Invalid=845840, Unknown=0, NotChecked=0, Total=1523990 [2023-11-29 04:48:27,809 INFO L87 Difference]: Start difference. First operand 628 states and 679 transitions. Second operand has 1235 states, 1235 states have (on average 1.0129554655870445) internal successors, (1251), 1234 states have internal predecessors, (1251), 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 04:49:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:49:03,803 INFO L93 Difference]: Finished difference Result 1266 states and 1780 transitions. [2023-11-29 04:49:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 824 states. [2023-11-29 04:49:03,805 INFO L78 Accepts]: Start accepts. Automaton has has 1235 states, 1235 states have (on average 1.0129554655870445) internal successors, (1251), 1234 states have internal predecessors, (1251), 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 433 [2023-11-29 04:49:03,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:49:03,810 INFO L225 Difference]: With dead ends: 1266 [2023-11-29 04:49:03,810 INFO L226 Difference]: Without dead ends: 1050 [2023-11-29 04:49:03,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1276 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674449 ImplicationChecksByTransitivity, 341.2s TimeCoverageRelationStatistics Valid=678150, Invalid=845840, Unknown=0, NotChecked=0, Total=1523990 [2023-11-29 04:49:03,884 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:49:03,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 70 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 04:49:03,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2023-11-29 04:49:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1040. [2023-11-29 04:49:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 1.0500481231953802) internal successors, (1091), 1039 states have internal predecessors, (1091), 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 04:49:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1091 transitions. [2023-11-29 04:49:04,039 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1091 transitions. Word has length 433 [2023-11-29 04:49:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:49:04,039 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 1091 transitions. [2023-11-29 04:49:04,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 1235 states, 1235 states have (on average 1.0129554655870445) internal successors, (1251), 1234 states have internal predecessors, (1251), 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 04:49:04,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1091 transitions. [2023-11-29 04:49:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2023-11-29 04:49:04,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:49:04,046 INFO L195 NwaCegarLoop]: trace histogram [822, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:49:04,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 04:49:04,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe73351-84f6-49ce-a3ee-64a2b8298475/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:49:04,247 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:49:04,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:49:04,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1416358768, now seen corresponding path program 3 times [2023-11-29 04:49:04,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:49:04,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152716704] [2023-11-29 04:49:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:49:04,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:49:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat