./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label00.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_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label00.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI --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 3ea550ea84532936eb56139afae65b42144a4b074245a3236deaaac48613846c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:46:10,372 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:46:10,480 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:46:10,489 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:46:10,489 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:46:10,538 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:46:10,539 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:46:10,539 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:46:10,540 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:46:10,545 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:46:10,546 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:46:10,546 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:46:10,547 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:46:10,549 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:46:10,550 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:46:10,550 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:46:10,551 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:46:10,551 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:46:10,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:46:10,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:46:10,554 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:46:10,555 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:46:10,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:46:10,556 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:46:10,556 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:46:10,557 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:46:10,557 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:46:10,558 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:46:10,559 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:46:10,559 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:46:10,560 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:46:10,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:46:10,561 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:46:10,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:46:10,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:46:10,579 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:46:10,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:46:10,579 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:46:10,580 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:46:10,580 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:46:10,580 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:46:10,582 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:46:10,583 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_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea550ea84532936eb56139afae65b42144a4b074245a3236deaaac48613846c [2023-11-24 21:46:10,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:46:11,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:46:11,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:46:11,017 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:46:11,017 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:46:11,019 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem11_label00.c [2023-11-24 21:46:14,222 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:46:14,652 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:46:14,652 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/sv-benchmarks/c/eca-rers2012/Problem11_label00.c [2023-11-24 21:46:14,673 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/data/6d13399cf/3ea7a3dadcdf46f9886525d9d322bf5e/FLAGd9d244f4d [2023-11-24 21:46:14,689 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/data/6d13399cf/3ea7a3dadcdf46f9886525d9d322bf5e [2023-11-24 21:46:14,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:46:14,694 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:46:14,695 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:46:14,696 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:46:14,702 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:46:14,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:46:14" (1/1) ... [2023-11-24 21:46:14,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490c2db5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:14, skipping insertion in model container [2023-11-24 21:46:14,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:46:14" (1/1) ... [2023-11-24 21:46:14,762 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:46:14,982 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_0f4fb53a-779e-442a-b266-da7d7d36c655/sv-benchmarks/c/eca-rers2012/Problem11_label00.c[1022,1035] [2023-11-24 21:46:15,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:46:15,405 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:46:15,421 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_0f4fb53a-779e-442a-b266-da7d7d36c655/sv-benchmarks/c/eca-rers2012/Problem11_label00.c[1022,1035] [2023-11-24 21:46:15,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:46:15,676 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:46:15,676 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15 WrapperNode [2023-11-24 21:46:15,677 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:46:15,678 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:46:15,679 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:46:15,679 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:46:15,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (1/1) ... [2023-11-24 21:46:15,720 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (1/1) ... [2023-11-24 21:46:15,908 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1000 [2023-11-24 21:46:15,914 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:46:15,914 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:46:15,915 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:46:15,915 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:46:15,939 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (1/1) ... [2023-11-24 21:46:15,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (1/1) ... [2023-11-24 21:46:15,952 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (1/1) ... [2023-11-24 21:46:16,044 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-24 21:46:16,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (1/1) ... [2023-11-24 21:46:16,044 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (1/1) ... [2023-11-24 21:46:16,104 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (1/1) ... [2023-11-24 21:46:16,115 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (1/1) ... [2023-11-24 21:46:16,125 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (1/1) ... [2023-11-24 21:46:16,137 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (1/1) ... [2023-11-24 21:46:16,159 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:46:16,160 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:46:16,160 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:46:16,160 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:46:16,161 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (1/1) ... [2023-11-24 21:46:16,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:46:16,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:16,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:46:16,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:46:16,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:46:16,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:46:16,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:46:16,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:46:16,333 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:46:16,336 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:46:18,180 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:46:18,237 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:46:18,238 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:46:18,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:46:18 BoogieIcfgContainer [2023-11-24 21:46:18,239 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:46:18,242 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:46:18,242 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:46:18,245 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:46:18,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:46:14" (1/3) ... [2023-11-24 21:46:18,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff7b55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:46:18, skipping insertion in model container [2023-11-24 21:46:18,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:46:15" (2/3) ... [2023-11-24 21:46:18,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff7b55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:46:18, skipping insertion in model container [2023-11-24 21:46:18,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:46:18" (3/3) ... [2023-11-24 21:46:18,249 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label00.c [2023-11-24 21:46:18,270 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:46:18,271 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:46:18,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:46:18,337 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;@2154c32c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:46:18,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:46:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 221 states, 219 states have (on average 1.917808219178082) internal successors, (420), 220 states have internal predecessors, (420), 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) [2023-11-24 21:46:18,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:46:18,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:18,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:46:18,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:18,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1187991693, now seen corresponding path program 1 times [2023-11-24 21:46:18,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:18,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123050876] [2023-11-24 21:46:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:18,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:18,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123050876] [2023-11-24 21:46:18,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123050876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:18,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:18,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:46:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009651572] [2023-11-24 21:46:18,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:18,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:46:18,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:18,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:46:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:46:18,669 INFO L87 Difference]: Start difference. First operand has 221 states, 219 states have (on average 1.917808219178082) internal successors, (420), 220 states have internal predecessors, (420), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-24 21:46:20,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:20,003 INFO L93 Difference]: Finished difference Result 636 states and 1220 transitions. [2023-11-24 21:46:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:46:20,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-11-24 21:46:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:20,020 INFO L225 Difference]: With dead ends: 636 [2023-11-24 21:46:20,021 INFO L226 Difference]: Without dead ends: 412 [2023-11-24 21:46:20,025 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 [2023-11-24 21:46:20,029 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 220 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:20,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 157 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 21:46:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-11-24 21:46:20,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2023-11-24 21:46:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.4549878345498783) internal successors, (598), 411 states have internal predecessors, (598), 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) [2023-11-24 21:46:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 598 transitions. [2023-11-24 21:46:20,097 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 598 transitions. Word has length 5 [2023-11-24 21:46:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:20,097 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 598 transitions. [2023-11-24 21:46:20,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-24 21:46:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 598 transitions. [2023-11-24 21:46:20,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-24 21:46:20,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:20,101 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:20,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:46:20,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:20,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:20,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1143875557, now seen corresponding path program 1 times [2023-11-24 21:46:20,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:20,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691165658] [2023-11-24 21:46:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:20,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:20,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:20,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691165658] [2023-11-24 21:46:20,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691165658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:20,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:20,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:46:20,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574598409] [2023-11-24 21:46:20,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:20,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:46:20,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:20,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:46:20,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:46:20,512 INFO L87 Difference]: Start difference. First operand 412 states and 598 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2023-11-24 21:46:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:21,691 INFO L93 Difference]: Finished difference Result 1210 states and 1762 transitions. [2023-11-24 21:46:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:46:21,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 73 [2023-11-24 21:46:21,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:21,698 INFO L225 Difference]: With dead ends: 1210 [2023-11-24 21:46:21,698 INFO L226 Difference]: Without dead ends: 799 [2023-11-24 21:46:21,701 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 [2023-11-24 21:46:21,702 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 144 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:21,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 116 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 21:46:21,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-11-24 21:46:21,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 788. [2023-11-24 21:46:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 1.3761118170266835) internal successors, (1083), 787 states have internal predecessors, (1083), 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) [2023-11-24 21:46:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1083 transitions. [2023-11-24 21:46:21,755 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1083 transitions. Word has length 73 [2023-11-24 21:46:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:21,756 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1083 transitions. [2023-11-24 21:46:21,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2023-11-24 21:46:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1083 transitions. [2023-11-24 21:46:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-24 21:46:21,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:21,762 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:21,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:46:21,764 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:21,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1387998593, now seen corresponding path program 1 times [2023-11-24 21:46:21,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:21,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980673862] [2023-11-24 21:46:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:21,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:22,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:22,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980673862] [2023-11-24 21:46:22,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980673862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:22,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:22,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:46:22,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23870636] [2023-11-24 21:46:22,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:22,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:46:22,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:22,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:46:22,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:46:22,067 INFO L87 Difference]: Start difference. First operand 788 states and 1083 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2023-11-24 21:46:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:23,151 INFO L93 Difference]: Finished difference Result 1944 states and 2613 transitions. [2023-11-24 21:46:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:46:23,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 74 [2023-11-24 21:46:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:23,159 INFO L225 Difference]: With dead ends: 1944 [2023-11-24 21:46:23,159 INFO L226 Difference]: Without dead ends: 1157 [2023-11-24 21:46:23,161 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 [2023-11-24 21:46:23,162 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 120 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:23,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 188 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:46:23,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2023-11-24 21:46:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1156. [2023-11-24 21:46:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 1.2718614718614718) internal successors, (1469), 1155 states have internal predecessors, (1469), 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) [2023-11-24 21:46:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1469 transitions. [2023-11-24 21:46:23,195 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1469 transitions. Word has length 74 [2023-11-24 21:46:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:23,195 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 1469 transitions. [2023-11-24 21:46:23,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2023-11-24 21:46:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1469 transitions. [2023-11-24 21:46:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-24 21:46:23,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:23,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:23,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:46:23,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:23,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash 243327772, now seen corresponding path program 1 times [2023-11-24 21:46:23,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:23,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529484852] [2023-11-24 21:46:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:23,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:23,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:23,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529484852] [2023-11-24 21:46:23,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529484852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:23,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:23,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:46:23,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880452021] [2023-11-24 21:46:23,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:23,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:46:23,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:23,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:46:23,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:46:23,520 INFO L87 Difference]: Start difference. First operand 1156 states and 1469 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2023-11-24 21:46:24,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:24,741 INFO L93 Difference]: Finished difference Result 2690 states and 3499 transitions. [2023-11-24 21:46:24,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:46:24,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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 132 [2023-11-24 21:46:24,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:24,760 INFO L225 Difference]: With dead ends: 2690 [2023-11-24 21:46:24,760 INFO L226 Difference]: Without dead ends: 1719 [2023-11-24 21:46:24,766 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 [2023-11-24 21:46:24,775 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 199 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:24,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 334 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 21:46:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2023-11-24 21:46:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1527. [2023-11-24 21:46:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 1.2568807339449541) internal successors, (1918), 1526 states have internal predecessors, (1918), 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) [2023-11-24 21:46:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 1918 transitions. [2023-11-24 21:46:24,831 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 1918 transitions. Word has length 132 [2023-11-24 21:46:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:24,832 INFO L495 AbstractCegarLoop]: Abstraction has 1527 states and 1918 transitions. [2023-11-24 21:46:24,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2023-11-24 21:46:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 1918 transitions. [2023-11-24 21:46:24,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-11-24 21:46:24,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:24,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:24,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:46:24,840 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:24,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:24,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1215353957, now seen corresponding path program 1 times [2023-11-24 21:46:24,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:24,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283727719] [2023-11-24 21:46:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:24,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-24 21:46:25,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:25,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283727719] [2023-11-24 21:46:25,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283727719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:25,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:25,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:46:25,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993945634] [2023-11-24 21:46:25,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:25,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:46:25,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:25,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:46:25,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:46:25,163 INFO L87 Difference]: Start difference. First operand 1527 states and 1918 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-24 21:46:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:26,221 INFO L93 Difference]: Finished difference Result 3431 states and 4331 transitions. [2023-11-24 21:46:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:46:26,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 186 [2023-11-24 21:46:26,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:26,236 INFO L225 Difference]: With dead ends: 3431 [2023-11-24 21:46:26,236 INFO L226 Difference]: Without dead ends: 1905 [2023-11-24 21:46:26,238 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 [2023-11-24 21:46:26,239 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 196 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:26,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 343 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:46:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2023-11-24 21:46:26,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1895. [2023-11-24 21:46:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1894 states have (on average 1.2481520591341078) internal successors, (2364), 1894 states have internal predecessors, (2364), 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) [2023-11-24 21:46:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2364 transitions. [2023-11-24 21:46:26,286 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2364 transitions. Word has length 186 [2023-11-24 21:46:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:26,288 INFO L495 AbstractCegarLoop]: Abstraction has 1895 states and 2364 transitions. [2023-11-24 21:46:26,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-24 21:46:26,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2364 transitions. [2023-11-24 21:46:26,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-24 21:46:26,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:26,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:26,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:46:26,293 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:26,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:26,294 INFO L85 PathProgramCache]: Analyzing trace with hash -547992548, now seen corresponding path program 1 times [2023-11-24 21:46:26,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:26,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064972439] [2023-11-24 21:46:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:26,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-24 21:46:26,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:26,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064972439] [2023-11-24 21:46:26,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064972439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:26,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:26,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:46:26,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458521976] [2023-11-24 21:46:26,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:26,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:46:26,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:26,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:46:26,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:46:26,603 INFO L87 Difference]: Start difference. First operand 1895 states and 2364 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-24 21:46:27,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:27,714 INFO L93 Difference]: Finished difference Result 4347 states and 5472 transitions. [2023-11-24 21:46:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:46:27,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 187 [2023-11-24 21:46:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:27,728 INFO L225 Difference]: With dead ends: 4347 [2023-11-24 21:46:27,729 INFO L226 Difference]: Without dead ends: 2453 [2023-11-24 21:46:27,732 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 [2023-11-24 21:46:27,732 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 191 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:27,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 378 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 21:46:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2023-11-24 21:46:27,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2263. [2023-11-24 21:46:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 1.242263483642794) internal successors, (2810), 2262 states have internal predecessors, (2810), 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) [2023-11-24 21:46:27,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 2810 transitions. [2023-11-24 21:46:27,787 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 2810 transitions. Word has length 187 [2023-11-24 21:46:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:27,787 INFO L495 AbstractCegarLoop]: Abstraction has 2263 states and 2810 transitions. [2023-11-24 21:46:27,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-24 21:46:27,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 2810 transitions. [2023-11-24 21:46:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-24 21:46:27,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:27,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:27,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:46:27,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:27,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash -930952150, now seen corresponding path program 1 times [2023-11-24 21:46:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:27,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063075943] [2023-11-24 21:46:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:27,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:28,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:28,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063075943] [2023-11-24 21:46:28,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063075943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:28,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:28,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:46:28,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222816430] [2023-11-24 21:46:28,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:28,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:46:28,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:46:28,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:46:28,453 INFO L87 Difference]: Start difference. First operand 2263 states and 2810 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-24 21:46:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:29,801 INFO L93 Difference]: Finished difference Result 5445 states and 6689 transitions. [2023-11-24 21:46:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:46:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 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 207 [2023-11-24 21:46:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:29,820 INFO L225 Difference]: With dead ends: 5445 [2023-11-24 21:46:29,820 INFO L226 Difference]: Without dead ends: 3183 [2023-11-24 21:46:29,824 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 [2023-11-24 21:46:29,825 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 306 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:29,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 157 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-24 21:46:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3183 states. [2023-11-24 21:46:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3183 to 2999. [2023-11-24 21:46:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 1.2068045363575717) internal successors, (3618), 2998 states have internal predecessors, (3618), 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) [2023-11-24 21:46:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 3618 transitions. [2023-11-24 21:46:29,923 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 3618 transitions. Word has length 207 [2023-11-24 21:46:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:29,924 INFO L495 AbstractCegarLoop]: Abstraction has 2999 states and 3618 transitions. [2023-11-24 21:46:29,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 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) [2023-11-24 21:46:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 3618 transitions. [2023-11-24 21:46:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-24 21:46:29,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:29,929 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:29,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:46:29,930 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:29,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash 582883810, now seen corresponding path program 1 times [2023-11-24 21:46:29,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:29,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576215355] [2023-11-24 21:46:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:29,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:46:30,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:30,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576215355] [2023-11-24 21:46:30,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576215355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:30,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:30,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:46:30,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665158557] [2023-11-24 21:46:30,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:30,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:46:30,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:30,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:46:30,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:46:30,146 INFO L87 Difference]: Start difference. First operand 2999 states and 3618 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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) [2023-11-24 21:46:31,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:31,198 INFO L93 Difference]: Finished difference Result 6916 states and 8516 transitions. [2023-11-24 21:46:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:46:31,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 208 [2023-11-24 21:46:31,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:31,219 INFO L225 Difference]: With dead ends: 6916 [2023-11-24 21:46:31,219 INFO L226 Difference]: Without dead ends: 3918 [2023-11-24 21:46:31,223 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 [2023-11-24 21:46:31,224 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 115 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:31,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 151 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:46:31,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2023-11-24 21:46:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3917. [2023-11-24 21:46:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3916 states have (on average 1.196629213483146) internal successors, (4686), 3916 states have internal predecessors, (4686), 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) [2023-11-24 21:46:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 4686 transitions. [2023-11-24 21:46:31,319 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 4686 transitions. Word has length 208 [2023-11-24 21:46:31,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:31,320 INFO L495 AbstractCegarLoop]: Abstraction has 3917 states and 4686 transitions. [2023-11-24 21:46:31,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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) [2023-11-24 21:46:31,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 4686 transitions. [2023-11-24 21:46:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-11-24 21:46:31,324 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:31,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:31,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:46:31,325 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:31,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2115966351, now seen corresponding path program 1 times [2023-11-24 21:46:31,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:31,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073505330] [2023-11-24 21:46:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:31,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:31,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:31,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073505330] [2023-11-24 21:46:31,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073505330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:31,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:31,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:46:31,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878328765] [2023-11-24 21:46:31,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:31,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:46:31,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:31,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:46:31,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:46:31,955 INFO L87 Difference]: Start difference. First operand 3917 states and 4686 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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) [2023-11-24 21:46:33,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:33,378 INFO L93 Difference]: Finished difference Result 8570 states and 10210 transitions. [2023-11-24 21:46:33,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:46:33,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 217 [2023-11-24 21:46:33,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:33,403 INFO L225 Difference]: With dead ends: 8570 [2023-11-24 21:46:33,403 INFO L226 Difference]: Without dead ends: 4654 [2023-11-24 21:46:33,408 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 [2023-11-24 21:46:33,411 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 280 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:33,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 162 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-24 21:46:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2023-11-24 21:46:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4101. [2023-11-24 21:46:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 4100 states have (on average 1.1921951219512195) internal successors, (4888), 4100 states have internal predecessors, (4888), 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) [2023-11-24 21:46:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 4888 transitions. [2023-11-24 21:46:33,519 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 4888 transitions. Word has length 217 [2023-11-24 21:46:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:33,521 INFO L495 AbstractCegarLoop]: Abstraction has 4101 states and 4888 transitions. [2023-11-24 21:46:33,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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) [2023-11-24 21:46:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 4888 transitions. [2023-11-24 21:46:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-11-24 21:46:33,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:33,525 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:33,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:46:33,526 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:33,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash -25257430, now seen corresponding path program 1 times [2023-11-24 21:46:33,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:33,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55092863] [2023-11-24 21:46:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:33,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:33,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:33,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55092863] [2023-11-24 21:46:33,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55092863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:33,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:33,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:46:33,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549236302] [2023-11-24 21:46:33,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:33,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:46:33,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:33,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:46:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:46:33,799 INFO L87 Difference]: Start difference. First operand 4101 states and 4888 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2023-11-24 21:46:34,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:34,752 INFO L93 Difference]: Finished difference Result 8199 states and 9773 transitions. [2023-11-24 21:46:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:46:34,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 217 [2023-11-24 21:46:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:34,773 INFO L225 Difference]: With dead ends: 8199 [2023-11-24 21:46:34,773 INFO L226 Difference]: Without dead ends: 4099 [2023-11-24 21:46:34,777 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 [2023-11-24 21:46:34,778 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 148 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:34,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 297 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:46:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2023-11-24 21:46:34,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 4099. [2023-11-24 21:46:34,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4099 states, 4098 states have (on average 1.160566129819424) internal successors, (4756), 4098 states have internal predecessors, (4756), 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) [2023-11-24 21:46:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4099 states to 4099 states and 4756 transitions. [2023-11-24 21:46:34,865 INFO L78 Accepts]: Start accepts. Automaton has 4099 states and 4756 transitions. Word has length 217 [2023-11-24 21:46:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:34,866 INFO L495 AbstractCegarLoop]: Abstraction has 4099 states and 4756 transitions. [2023-11-24 21:46:34,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2023-11-24 21:46:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4099 states and 4756 transitions. [2023-11-24 21:46:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-24 21:46:34,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:34,871 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:34,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:46:34,871 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:34,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1479432987, now seen corresponding path program 1 times [2023-11-24 21:46:34,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:34,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479850231] [2023-11-24 21:46:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:34,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 74 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:35,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:35,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479850231] [2023-11-24 21:46:35,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479850231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:46:35,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788986520] [2023-11-24 21:46:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:35,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:35,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:35,671 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:46:35,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:46:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:35,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 21:46:35,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:46:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 74 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:37,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:46:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 74 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:38,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788986520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:46:38,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:46:38,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-24 21:46:38,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126646921] [2023-11-24 21:46:38,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:46:38,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:46:38,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:38,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:46:38,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:46:38,867 INFO L87 Difference]: Start difference. First operand 4099 states and 4756 transitions. Second operand has 9 states, 9 states have (on average 34.666666666666664) internal successors, (312), 8 states have internal predecessors, (312), 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) [2023-11-24 21:46:43,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:43,634 INFO L93 Difference]: Finished difference Result 11891 states and 13800 transitions. [2023-11-24 21:46:43,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:46:43,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 34.666666666666664) internal successors, (312), 8 states have internal predecessors, (312), 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 219 [2023-11-24 21:46:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:43,672 INFO L225 Difference]: With dead ends: 11891 [2023-11-24 21:46:43,672 INFO L226 Difference]: Without dead ends: 7793 [2023-11-24 21:46:43,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2023-11-24 21:46:43,679 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1797 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 3554 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 3554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:43,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1797 Valid, 109 Invalid, 4274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 3554 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-24 21:46:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2023-11-24 21:46:43,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6297. [2023-11-24 21:46:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6297 states, 6296 states have (on average 1.1256353240152477) internal successors, (7087), 6296 states have internal predecessors, (7087), 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) [2023-11-24 21:46:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6297 states to 6297 states and 7087 transitions. [2023-11-24 21:46:43,882 INFO L78 Accepts]: Start accepts. Automaton has 6297 states and 7087 transitions. Word has length 219 [2023-11-24 21:46:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:43,882 INFO L495 AbstractCegarLoop]: Abstraction has 6297 states and 7087 transitions. [2023-11-24 21:46:43,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.666666666666664) internal successors, (312), 8 states have internal predecessors, (312), 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) [2023-11-24 21:46:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 6297 states and 7087 transitions. [2023-11-24 21:46:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-11-24 21:46:43,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:43,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:43,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 21:46:44,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:44,094 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:44,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:44,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1389628835, now seen corresponding path program 1 times [2023-11-24 21:46:44,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:44,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102395123] [2023-11-24 21:46:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:44,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:44,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:44,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102395123] [2023-11-24 21:46:44,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102395123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:44,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:44,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:46:44,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137643007] [2023-11-24 21:46:44,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:44,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:46:44,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:44,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:46:44,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:46:44,777 INFO L87 Difference]: Start difference. First operand 6297 states and 7087 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 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) [2023-11-24 21:46:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:46,381 INFO L93 Difference]: Finished difference Result 17757 states and 19933 transitions. [2023-11-24 21:46:46,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:46:46,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 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 [2023-11-24 21:46:46,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:46,414 INFO L225 Difference]: With dead ends: 17757 [2023-11-24 21:46:46,414 INFO L226 Difference]: Without dead ends: 11277 [2023-11-24 21:46:46,423 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 [2023-11-24 21:46:46,424 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 248 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:46,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 52 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-24 21:46:46,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11277 states. [2023-11-24 21:46:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11277 to 11273. [2023-11-24 21:46:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11272 states have (on average 1.1188786373314408) internal successors, (12612), 11272 states have internal predecessors, (12612), 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) [2023-11-24 21:46:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 12612 transitions. [2023-11-24 21:46:46,703 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 12612 transitions. Word has length 222 [2023-11-24 21:46:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:46,704 INFO L495 AbstractCegarLoop]: Abstraction has 11273 states and 12612 transitions. [2023-11-24 21:46:46,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 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) [2023-11-24 21:46:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 12612 transitions. [2023-11-24 21:46:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-11-24 21:46:46,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:46,710 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:46,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:46:46,711 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:46,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:46,711 INFO L85 PathProgramCache]: Analyzing trace with hash -591970369, now seen corresponding path program 1 times [2023-11-24 21:46:46,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:46,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291232838] [2023-11-24 21:46:46,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:46,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 63 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:47,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:47,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291232838] [2023-11-24 21:46:47,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291232838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:46:47,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876572730] [2023-11-24 21:46:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:47,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:47,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:46:47,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:46:47,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:46:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:47,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:46:47,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:46:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:46:48,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:46:48,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876572730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:48,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:46:48,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 21:46:48,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152111357] [2023-11-24 21:46:48,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:48,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:46:48,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:48,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:46:48,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:46:48,177 INFO L87 Difference]: Start difference. First operand 11273 states and 12612 transitions. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 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) [2023-11-24 21:46:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:49,451 INFO L93 Difference]: Finished difference Result 21077 states and 23623 transitions. [2023-11-24 21:46:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:46:49,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 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 238 [2023-11-24 21:46:49,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:49,483 INFO L225 Difference]: With dead ends: 21077 [2023-11-24 21:46:49,484 INFO L226 Difference]: Without dead ends: 12383 [2023-11-24 21:46:49,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:46:49,493 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 183 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:49,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 145 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 21:46:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12383 states. [2023-11-24 21:46:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12383 to 11641. [2023-11-24 21:46:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11641 states, 11640 states have (on average 1.118213058419244) internal successors, (13016), 11640 states have internal predecessors, (13016), 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) [2023-11-24 21:46:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11641 states to 11641 states and 13016 transitions. [2023-11-24 21:46:49,750 INFO L78 Accepts]: Start accepts. Automaton has 11641 states and 13016 transitions. Word has length 238 [2023-11-24 21:46:49,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:49,751 INFO L495 AbstractCegarLoop]: Abstraction has 11641 states and 13016 transitions. [2023-11-24 21:46:49,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 3 states have internal predecessors, (238), 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) [2023-11-24 21:46:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 11641 states and 13016 transitions. [2023-11-24 21:46:49,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-11-24 21:46:49,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:49,759 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:49,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:46:49,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4fb53a-779e-442a-b266-da7d7d36c655/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:46:49,964 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:49,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:49,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1680545251, now seen corresponding path program 1 times [2023-11-24 21:46:49,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:49,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363540941] [2023-11-24 21:46:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:49,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:46:50,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:50,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363540941] [2023-11-24 21:46:50,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363540941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:50,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:50,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:46:50,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425253972] [2023-11-24 21:46:50,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:50,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:46:50,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:46:50,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:46:50,508 INFO L87 Difference]: Start difference. First operand 11641 states and 13016 transitions. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 3 states have internal predecessors, (284), 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) [2023-11-24 21:46:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:52,298 INFO L93 Difference]: Finished difference Result 26231 states and 29305 transitions. [2023-11-24 21:46:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:46:52,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 3 states have internal predecessors, (284), 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 287 [2023-11-24 21:46:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:52,333 INFO L225 Difference]: With dead ends: 26231 [2023-11-24 21:46:52,333 INFO L226 Difference]: Without dead ends: 14959 [2023-11-24 21:46:52,346 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 [2023-11-24 21:46:52,347 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 213 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:52,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 129 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-24 21:46:52,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14959 states. [2023-11-24 21:46:52,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14959 to 14955. [2023-11-24 21:46:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14955 states, 14954 states have (on average 1.1029156078641167) internal successors, (16493), 14954 states have internal predecessors, (16493), 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) [2023-11-24 21:46:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14955 states to 14955 states and 16493 transitions. [2023-11-24 21:46:52,599 INFO L78 Accepts]: Start accepts. Automaton has 14955 states and 16493 transitions. Word has length 287 [2023-11-24 21:46:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:52,600 INFO L495 AbstractCegarLoop]: Abstraction has 14955 states and 16493 transitions. [2023-11-24 21:46:52,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 3 states have internal predecessors, (284), 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) [2023-11-24 21:46:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 14955 states and 16493 transitions. [2023-11-24 21:46:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-24 21:46:52,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:52,608 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:52,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:46:52,609 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:52,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:52,609 INFO L85 PathProgramCache]: Analyzing trace with hash -620526530, now seen corresponding path program 1 times [2023-11-24 21:46:52,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:52,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132934360] [2023-11-24 21:46:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-24 21:46:53,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:53,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132934360] [2023-11-24 21:46:53,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132934360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:53,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:53,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:46:53,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418808853] [2023-11-24 21:46:53,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:53,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:46:53,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:46:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:46:53,494 INFO L87 Difference]: Start difference. First operand 14955 states and 16493 transitions. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 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) [2023-11-24 21:46:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:54,890 INFO L93 Difference]: Finished difference Result 27520 states and 30440 transitions. [2023-11-24 21:46:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:46:54,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 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 292 [2023-11-24 21:46:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:54,916 INFO L225 Difference]: With dead ends: 27520 [2023-11-24 21:46:54,916 INFO L226 Difference]: Without dead ends: 15330 [2023-11-24 21:46:54,929 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 [2023-11-24 21:46:54,930 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 196 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:54,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 159 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-24 21:46:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15330 states. [2023-11-24 21:46:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15330 to 13667. [2023-11-24 21:46:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13667 states, 13666 states have (on average 1.1033952875750037) internal successors, (15079), 13666 states have internal predecessors, (15079), 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) [2023-11-24 21:46:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13667 states to 13667 states and 15079 transitions. [2023-11-24 21:46:55,131 INFO L78 Accepts]: Start accepts. Automaton has 13667 states and 15079 transitions. Word has length 292 [2023-11-24 21:46:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:55,132 INFO L495 AbstractCegarLoop]: Abstraction has 13667 states and 15079 transitions. [2023-11-24 21:46:55,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 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) [2023-11-24 21:46:55,132 INFO L276 IsEmpty]: Start isEmpty. Operand 13667 states and 15079 transitions. [2023-11-24 21:46:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-24 21:46:55,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:55,147 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:55,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:46:55,148 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:46:55,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:55,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1794822886, now seen corresponding path program 1 times [2023-11-24 21:46:55,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:46:55,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900430828] [2023-11-24 21:46:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:55,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:46:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-24 21:46:56,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:46:56,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900430828] [2023-11-24 21:46:56,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900430828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:46:56,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:46:56,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:46:56,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792005234] [2023-11-24 21:46:56,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:46:56,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:46:56,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:46:56,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:46:56,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:46:56,025 INFO L87 Difference]: Start difference. First operand 13667 states and 15079 transitions. Second operand has 7 states, 7 states have (on average 32.0) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)