./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label35.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/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_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label35.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/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_c6be7e9b-7760-4f3d-abb6-314590844b8c/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 332223a74015f37ef1848305a6dc2d3188fda0d257576dbd7b4025d0bb05f229 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:59:12,245 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:59:12,351 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:59:12,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:59:12,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:59:12,384 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:59:12,385 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:59:12,386 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:59:12,386 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:59:12,387 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:59:12,388 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:59:12,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:59:12,389 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:59:12,390 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:59:12,391 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:59:12,391 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:59:12,392 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:59:12,393 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:59:12,393 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:59:12,394 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:59:12,394 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:59:12,395 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:59:12,396 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:59:12,396 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:59:12,397 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:59:12,397 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:59:12,398 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:59:12,398 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:59:12,399 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:59:12,399 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:59:12,400 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:59:12,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:59:12,401 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:59:12,401 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:59:12,402 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:59:12,402 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:59:12,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:59:12,404 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:59:12,404 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:59:12,405 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:59:12,405 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:59:12,406 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:59:12,406 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_c6be7e9b-7760-4f3d-abb6-314590844b8c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 332223a74015f37ef1848305a6dc2d3188fda0d257576dbd7b4025d0bb05f229 [2023-11-24 21:59:12,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:59:12,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:59:12,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:59:12,768 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:59:12,768 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:59:12,770 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem11_label35.c [2023-11-24 21:59:16,055 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:59:16,460 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:59:16,461 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/sv-benchmarks/c/eca-rers2012/Problem11_label35.c [2023-11-24 21:59:16,488 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/data/72a677371/1326a379a8654afabd44ae1380f52dad/FLAG2c7dd2acb [2023-11-24 21:59:16,512 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/data/72a677371/1326a379a8654afabd44ae1380f52dad [2023-11-24 21:59:16,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:59:16,522 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:59:16,526 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:16,526 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:59:16,533 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:59:16,536 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:16" (1/1) ... [2023-11-24 21:59:16,537 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@367d743b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:16, skipping insertion in model container [2023-11-24 21:59:16,537 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:59:16" (1/1) ... [2023-11-24 21:59:16,624 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:59:17,005 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_c6be7e9b-7760-4f3d-abb6-314590844b8c/sv-benchmarks/c/eca-rers2012/Problem11_label35.c[8398,8411] [2023-11-24 21:59:17,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:17,316 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:59:17,368 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_c6be7e9b-7760-4f3d-abb6-314590844b8c/sv-benchmarks/c/eca-rers2012/Problem11_label35.c[8398,8411] [2023-11-24 21:59:17,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:59:17,630 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:59:17,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17 WrapperNode [2023-11-24 21:59:17,631 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:59:17,633 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:17,633 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:59:17,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:59:17,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (1/1) ... [2023-11-24 21:59:17,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (1/1) ... [2023-11-24 21:59:17,788 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1000 [2023-11-24 21:59:17,788 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:59:17,789 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:59:17,789 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:59:17,790 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:59:17,802 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (1/1) ... [2023-11-24 21:59:17,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (1/1) ... [2023-11-24 21:59:17,812 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (1/1) ... [2023-11-24 21:59:17,853 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 21:59:17,854 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (1/1) ... [2023-11-24 21:59:17,854 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (1/1) ... [2023-11-24 21:59:17,886 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (1/1) ... [2023-11-24 21:59:17,897 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (1/1) ... [2023-11-24 21:59:17,917 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (1/1) ... [2023-11-24 21:59:17,929 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (1/1) ... [2023-11-24 21:59:17,957 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:59:17,958 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:59:17,958 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:59:17,958 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:59:17,959 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (1/1) ... [2023-11-24 21:59:17,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:59:17,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:17,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:59:18,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:59:18,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:59:18,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:59:18,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:59:18,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:59:18,101 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:59:18,103 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:59:19,929 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:59:20,006 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:59:20,008 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:59:20,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:59:20 BoogieIcfgContainer [2023-11-24 21:59:20,009 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:59:20,014 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:59:20,014 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:59:20,018 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:59:20,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:59:16" (1/3) ... [2023-11-24 21:59:20,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdd4604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:59:20, skipping insertion in model container [2023-11-24 21:59:20,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:59:17" (2/3) ... [2023-11-24 21:59:20,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdd4604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:59:20, skipping insertion in model container [2023-11-24 21:59:20,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:59:20" (3/3) ... [2023-11-24 21:59:20,025 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label35.c [2023-11-24 21:59:20,075 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:59:20,075 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:59:20,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:59:20,140 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;@373f784d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:59:20,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:59:20,146 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 21:59:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-24 21:59:20,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:20,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:20,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:20,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash 132154064, now seen corresponding path program 1 times [2023-11-24 21:59:20,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:20,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048725971] [2023-11-24 21:59:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:20,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:20,365 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 21:59:20,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048725971] [2023-11-24 21:59:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048725971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:20,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:20,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:20,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087245108] [2023-11-24 21:59:20,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:20,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:59:20,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:20,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:59:20,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:59:20,424 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 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 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 21:59:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:20,492 INFO L93 Difference]: Finished difference Result 441 states and 839 transitions. [2023-11-24 21:59:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:59:20,495 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 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 57 [2023-11-24 21:59:20,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:20,513 INFO L225 Difference]: With dead ends: 441 [2023-11-24 21:59:20,514 INFO L226 Difference]: Without dead ends: 219 [2023-11-24 21:59:20,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:59:20,523 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:20,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 355 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:59:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-24 21:59:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-11-24 21:59:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.628440366972477) internal successors, (355), 218 states have internal predecessors, (355), 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 21:59:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 355 transitions. [2023-11-24 21:59:20,584 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 355 transitions. Word has length 57 [2023-11-24 21:59:20,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:20,585 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 355 transitions. [2023-11-24 21:59:20,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 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 21:59:20,585 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 355 transitions. [2023-11-24 21:59:20,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-24 21:59:20,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:20,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:20,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:59:20,588 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:20,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:20,589 INFO L85 PathProgramCache]: Analyzing trace with hash -930186340, now seen corresponding path program 1 times [2023-11-24 21:59:20,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:20,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136001071] [2023-11-24 21:59:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:20,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:20,899 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 21:59:20,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:20,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136001071] [2023-11-24 21:59:20,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136001071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:20,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:20,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:20,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024744379] [2023-11-24 21:59:20,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:20,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:20,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:20,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:20,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:20,907 INFO L87 Difference]: Start difference. First operand 219 states and 355 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 21:59:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:22,113 INFO L93 Difference]: Finished difference Result 630 states and 1029 transitions. [2023-11-24 21:59:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:22,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 57 [2023-11-24 21:59:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:22,118 INFO L225 Difference]: With dead ends: 630 [2023-11-24 21:59:22,118 INFO L226 Difference]: Without dead ends: 412 [2023-11-24 21:59:22,122 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 21:59:22,125 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 150 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:22,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 144 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 21:59:22,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-11-24 21:59:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 410. [2023-11-24 21:59:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.4596577017114913) internal successors, (597), 409 states have internal predecessors, (597), 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 21:59:22,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 597 transitions. [2023-11-24 21:59:22,186 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 597 transitions. Word has length 57 [2023-11-24 21:59:22,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:22,187 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 597 transitions. [2023-11-24 21:59:22,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 21:59:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 597 transitions. [2023-11-24 21:59:22,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-24 21:59:22,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:22,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-24 21:59:22,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:59:22,194 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:22,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:22,195 INFO L85 PathProgramCache]: Analyzing trace with hash -951919564, now seen corresponding path program 1 times [2023-11-24 21:59:22,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:22,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86689644] [2023-11-24 21:59:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:22,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:22,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:22,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86689644] [2023-11-24 21:59:22,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86689644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:22,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:22,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:22,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712481204] [2023-11-24 21:59:22,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:22,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:22,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:22,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:22,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:22,455 INFO L87 Difference]: Start difference. First operand 410 states and 597 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 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 21:59:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:23,499 INFO L93 Difference]: Finished difference Result 1208 states and 1764 transitions. [2023-11-24 21:59:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:23,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 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 125 [2023-11-24 21:59:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:23,505 INFO L225 Difference]: With dead ends: 1208 [2023-11-24 21:59:23,506 INFO L226 Difference]: Without dead ends: 799 [2023-11-24 21:59:23,507 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 21:59:23,508 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 144 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:23,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 118 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:59:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-11-24 21:59:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 786. [2023-11-24 21:59:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 1.3859872611464967) internal successors, (1088), 785 states have internal predecessors, (1088), 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 21:59:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1088 transitions. [2023-11-24 21:59:23,552 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1088 transitions. Word has length 125 [2023-11-24 21:59:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:23,553 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 1088 transitions. [2023-11-24 21:59:23,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 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 21:59:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1088 transitions. [2023-11-24 21:59:23,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-24 21:59:23,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:23,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-24 21:59:23,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:59:23,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:23,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash 264706866, now seen corresponding path program 1 times [2023-11-24 21:59:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:23,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776468524] [2023-11-24 21:59:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:23,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:23,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:23,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776468524] [2023-11-24 21:59:23,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776468524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:23,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:23,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:23,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87064913] [2023-11-24 21:59:23,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:23,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:23,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:23,980 INFO L87 Difference]: Start difference. First operand 786 states and 1088 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 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 21:59:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:25,116 INFO L93 Difference]: Finished difference Result 1941 states and 2630 transitions. [2023-11-24 21:59:25,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:25,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 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 126 [2023-11-24 21:59:25,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:25,125 INFO L225 Difference]: With dead ends: 1941 [2023-11-24 21:59:25,125 INFO L226 Difference]: Without dead ends: 1156 [2023-11-24 21:59:25,127 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 21:59:25,128 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, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:25,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 188 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 21:59:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2023-11-24 21:59:25,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1155. [2023-11-24 21:59:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.2781629116117852) internal successors, (1475), 1154 states have internal predecessors, (1475), 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 21:59:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1475 transitions. [2023-11-24 21:59:25,161 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1475 transitions. Word has length 126 [2023-11-24 21:59:25,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:25,162 INFO L495 AbstractCegarLoop]: Abstraction has 1155 states and 1475 transitions. [2023-11-24 21:59:25,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 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 21:59:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1475 transitions. [2023-11-24 21:59:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-24 21:59:25,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:25,166 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2023-11-24 21:59:25,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:59:25,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:25,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash 649528056, now seen corresponding path program 1 times [2023-11-24 21:59:25,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:25,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716046389] [2023-11-24 21:59:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:25,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-24 21:59:25,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:25,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716046389] [2023-11-24 21:59:25,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716046389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:25,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:25,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:25,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804294387] [2023-11-24 21:59:25,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:25,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:25,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:25,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:25,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:25,514 INFO L87 Difference]: Start difference. First operand 1155 states and 1475 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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 21:59:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:26,603 INFO L93 Difference]: Finished difference Result 2501 states and 3338 transitions. [2023-11-24 21:59:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:26,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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 169 [2023-11-24 21:59:26,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:26,614 INFO L225 Difference]: With dead ends: 2501 [2023-11-24 21:59:26,615 INFO L226 Difference]: Without dead ends: 1531 [2023-11-24 21:59:26,617 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 21:59:26,624 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 108 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:26,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 154 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:59:26,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2023-11-24 21:59:26,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1531. [2023-11-24 21:59:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 1.2620915032679738) internal successors, (1931), 1530 states have internal predecessors, (1931), 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 21:59:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 1931 transitions. [2023-11-24 21:59:26,671 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 1931 transitions. Word has length 169 [2023-11-24 21:59:26,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:26,674 INFO L495 AbstractCegarLoop]: Abstraction has 1531 states and 1931 transitions. [2023-11-24 21:59:26,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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 21:59:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 1931 transitions. [2023-11-24 21:59:26,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-11-24 21:59:26,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:26,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:26,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:59:26,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:26,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:26,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1196936717, now seen corresponding path program 1 times [2023-11-24 21:59:26,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:26,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676101922] [2023-11-24 21:59:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:26,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:27,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:27,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676101922] [2023-11-24 21:59:27,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676101922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:27,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:27,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:27,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750241510] [2023-11-24 21:59:27,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:27,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:27,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:27,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:27,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:27,045 INFO L87 Difference]: Start difference. First operand 1531 states and 1931 transitions. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 3 states have internal predecessors, (184), 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 21:59:28,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:28,893 INFO L93 Difference]: Finished difference Result 4930 states and 6395 transitions. [2023-11-24 21:59:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:28,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 3 states have internal predecessors, (184), 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 184 [2023-11-24 21:59:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:28,917 INFO L225 Difference]: With dead ends: 4930 [2023-11-24 21:59:28,920 INFO L226 Difference]: Without dead ends: 3584 [2023-11-24 21:59:28,923 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 21:59:28,925 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 306 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:28,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 92 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-24 21:59:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2023-11-24 21:59:28,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 3583. [2023-11-24 21:59:29,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.254606365159129) internal successors, (4494), 3582 states have internal predecessors, (4494), 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 21:59:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4494 transitions. [2023-11-24 21:59:29,021 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4494 transitions. Word has length 184 [2023-11-24 21:59:29,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:29,028 INFO L495 AbstractCegarLoop]: Abstraction has 3583 states and 4494 transitions. [2023-11-24 21:59:29,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 3 states have internal predecessors, (184), 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 21:59:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4494 transitions. [2023-11-24 21:59:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2023-11-24 21:59:29,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:29,034 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:29,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:59:29,034 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:29,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:29,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1298625936, now seen corresponding path program 1 times [2023-11-24 21:59:29,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:29,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433419729] [2023-11-24 21:59:29,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:29,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:29,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:29,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433419729] [2023-11-24 21:59:29,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433419729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:29,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:29,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:29,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716760156] [2023-11-24 21:59:29,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:29,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:29,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:29,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:29,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:29,433 INFO L87 Difference]: Start difference. First operand 3583 states and 4494 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 21:59:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:30,717 INFO L93 Difference]: Finished difference Result 8286 states and 10611 transitions. [2023-11-24 21:59:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:30,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 237 [2023-11-24 21:59:30,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:30,749 INFO L225 Difference]: With dead ends: 8286 [2023-11-24 21:59:30,750 INFO L226 Difference]: Without dead ends: 5072 [2023-11-24 21:59:30,757 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 21:59:30,762 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 136 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:30,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 344 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 21:59:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2023-11-24 21:59:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 5057. [2023-11-24 21:59:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 1.2278481012658229) internal successors, (6208), 5056 states have internal predecessors, (6208), 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 21:59:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 6208 transitions. [2023-11-24 21:59:30,908 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 6208 transitions. Word has length 237 [2023-11-24 21:59:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:30,908 INFO L495 AbstractCegarLoop]: Abstraction has 5057 states and 6208 transitions. [2023-11-24 21:59:30,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 21:59:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 6208 transitions. [2023-11-24 21:59:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-11-24 21:59:30,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:30,914 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:30,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:59:30,915 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:30,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1312140630, now seen corresponding path program 1 times [2023-11-24 21:59:30,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:30,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002571933] [2023-11-24 21:59:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:30,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:30,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-24 21:59:31,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:31,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002571933] [2023-11-24 21:59:31,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002571933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:31,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:31,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:31,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154694916] [2023-11-24 21:59:31,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:31,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:31,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:31,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:31,314 INFO L87 Difference]: Start difference. First operand 5057 states and 6208 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 21:59:32,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:32,436 INFO L93 Difference]: Finished difference Result 11052 states and 13654 transitions. [2023-11-24 21:59:32,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:32,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 21:59:32,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:32,471 INFO L225 Difference]: With dead ends: 11052 [2023-11-24 21:59:32,471 INFO L226 Difference]: Without dead ends: 6364 [2023-11-24 21:59:32,477 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 21:59:32,479 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 144 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 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 21:59:32,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 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 21:59:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6364 states. [2023-11-24 21:59:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6364 to 6345. [2023-11-24 21:59:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6345 states, 6344 states have (on average 1.2137452711223202) internal successors, (7700), 6344 states have internal predecessors, (7700), 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 21:59:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6345 states to 6345 states and 7700 transitions. [2023-11-24 21:59:32,634 INFO L78 Accepts]: Start accepts. Automaton has 6345 states and 7700 transitions. Word has length 238 [2023-11-24 21:59:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:32,634 INFO L495 AbstractCegarLoop]: Abstraction has 6345 states and 7700 transitions. [2023-11-24 21:59:32,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 21:59:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 6345 states and 7700 transitions. [2023-11-24 21:59:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-11-24 21:59:32,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:32,640 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:32,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:59:32,640 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:32,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash 667935211, now seen corresponding path program 1 times [2023-11-24 21:59:32,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:32,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790715691] [2023-11-24 21:59:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:32,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-24 21:59:33,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:33,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790715691] [2023-11-24 21:59:33,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790715691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:33,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:33,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:33,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116549327] [2023-11-24 21:59:33,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:33,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:33,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:33,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:33,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:33,040 INFO L87 Difference]: Start difference. First operand 6345 states and 7700 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 21:59:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:34,166 INFO L93 Difference]: Finished difference Result 13620 states and 16780 transitions. [2023-11-24 21:59:34,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:34,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 239 [2023-11-24 21:59:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:34,216 INFO L225 Difference]: With dead ends: 13620 [2023-11-24 21:59:34,217 INFO L226 Difference]: Without dead ends: 7644 [2023-11-24 21:59:34,224 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 21:59:34,225 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 139 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:34,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 368 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 21:59:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7644 states. [2023-11-24 21:59:34,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7644 to 7449. [2023-11-24 21:59:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7449 states, 7448 states have (on average 1.2070354457572503) internal successors, (8990), 7448 states have internal predecessors, (8990), 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 21:59:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7449 states to 7449 states and 8990 transitions. [2023-11-24 21:59:34,389 INFO L78 Accepts]: Start accepts. Automaton has 7449 states and 8990 transitions. Word has length 239 [2023-11-24 21:59:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:34,389 INFO L495 AbstractCegarLoop]: Abstraction has 7449 states and 8990 transitions. [2023-11-24 21:59:34,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 21:59:34,390 INFO L276 IsEmpty]: Start isEmpty. Operand 7449 states and 8990 transitions. [2023-11-24 21:59:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-11-24 21:59:34,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:34,442 INFO L195 NwaCegarLoop]: trace histogram [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, 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 21:59:34,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:59:34,443 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:34,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:34,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2014641799, now seen corresponding path program 1 times [2023-11-24 21:59:34,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:34,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640676294] [2023-11-24 21:59:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:34,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:34,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:34,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640676294] [2023-11-24 21:59:34,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640676294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:34,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:34,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:34,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458124948] [2023-11-24 21:59:34,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:34,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:34,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:34,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:34,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:34,991 INFO L87 Difference]: Start difference. First operand 7449 states and 8990 transitions. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 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 21:59:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:37,048 INFO L93 Difference]: Finished difference Result 21200 states and 26190 transitions. [2023-11-24 21:59:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:37,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 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 259 [2023-11-24 21:59:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:37,108 INFO L225 Difference]: With dead ends: 21200 [2023-11-24 21:59:37,108 INFO L226 Difference]: Without dead ends: 14120 [2023-11-24 21:59:37,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:59:37,126 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 273 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:37,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 206 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-24 21:59:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14120 states. [2023-11-24 21:59:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14120 to 12819. [2023-11-24 21:59:37,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12819 states, 12818 states have (on average 1.1994850990794195) internal successors, (15375), 12818 states have internal predecessors, (15375), 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 21:59:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12819 states to 12819 states and 15375 transitions. [2023-11-24 21:59:37,418 INFO L78 Accepts]: Start accepts. Automaton has 12819 states and 15375 transitions. Word has length 259 [2023-11-24 21:59:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:37,418 INFO L495 AbstractCegarLoop]: Abstraction has 12819 states and 15375 transitions. [2023-11-24 21:59:37,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 4 states have internal predecessors, (259), 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 21:59:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 12819 states and 15375 transitions. [2023-11-24 21:59:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-24 21:59:37,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:37,428 INFO L195 NwaCegarLoop]: trace histogram [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, 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 21:59:37,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:59:37,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:37,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:37,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1469880448, now seen corresponding path program 1 times [2023-11-24 21:59:37,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:37,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635346573] [2023-11-24 21:59:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:37,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:37,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:37,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635346573] [2023-11-24 21:59:37,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635346573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:37,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:37,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:37,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102320768] [2023-11-24 21:59:37,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:37,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:37,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:37,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:37,980 INFO L87 Difference]: Start difference. First operand 12819 states and 15375 transitions. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 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 21:59:39,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:39,944 INFO L93 Difference]: Finished difference Result 30436 states and 37140 transitions. [2023-11-24 21:59:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:39,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 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 269 [2023-11-24 21:59:39,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:39,986 INFO L225 Difference]: With dead ends: 30436 [2023-11-24 21:59:39,986 INFO L226 Difference]: Without dead ends: 17986 [2023-11-24 21:59:40,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:59:40,003 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 286 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:40,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 117 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-24 21:59:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17986 states. [2023-11-24 21:59:40,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17986 to 17972. [2023-11-24 21:59:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17972 states, 17971 states have (on average 1.2047187134828334) internal successors, (21650), 17971 states have internal predecessors, (21650), 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 21:59:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17972 states to 17972 states and 21650 transitions. [2023-11-24 21:59:40,367 INFO L78 Accepts]: Start accepts. Automaton has 17972 states and 21650 transitions. Word has length 269 [2023-11-24 21:59:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:40,368 INFO L495 AbstractCegarLoop]: Abstraction has 17972 states and 21650 transitions. [2023-11-24 21:59:40,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 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 21:59:40,368 INFO L276 IsEmpty]: Start isEmpty. Operand 17972 states and 21650 transitions. [2023-11-24 21:59:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-11-24 21:59:40,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:40,379 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-24 21:59:40,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:59:40,380 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:40,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:40,381 INFO L85 PathProgramCache]: Analyzing trace with hash -200048695, now seen corresponding path program 1 times [2023-11-24 21:59:40,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:40,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057912694] [2023-11-24 21:59:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-24 21:59:40,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:40,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057912694] [2023-11-24 21:59:40,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057912694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:40,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:40,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:40,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240308707] [2023-11-24 21:59:40,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:40,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:40,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:40,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:40,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:40,767 INFO L87 Difference]: Start difference. First operand 17972 states and 21650 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 21:59:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:42,073 INFO L93 Difference]: Finished difference Result 35769 states and 43130 transitions. [2023-11-24 21:59:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:42,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 276 [2023-11-24 21:59:42,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:42,121 INFO L225 Difference]: With dead ends: 35769 [2023-11-24 21:59:42,121 INFO L226 Difference]: Without dead ends: 17982 [2023-11-24 21:59:42,141 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 21:59:42,142 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 143 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:42,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 376 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 21:59:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17982 states. [2023-11-24 21:59:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17982 to 17971. [2023-11-24 21:59:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17971 states, 17970 states have (on average 1.1678352810239288) internal successors, (20986), 17970 states have internal predecessors, (20986), 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 21:59:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17971 states to 17971 states and 20986 transitions. [2023-11-24 21:59:42,598 INFO L78 Accepts]: Start accepts. Automaton has 17971 states and 20986 transitions. Word has length 276 [2023-11-24 21:59:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:42,599 INFO L495 AbstractCegarLoop]: Abstraction has 17971 states and 20986 transitions. [2023-11-24 21:59:42,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 21:59:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 17971 states and 20986 transitions. [2023-11-24 21:59:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2023-11-24 21:59:42,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:42,612 INFO L195 NwaCegarLoop]: trace histogram [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, 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 21:59:42,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:59:42,613 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:42,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:42,614 INFO L85 PathProgramCache]: Analyzing trace with hash -178019664, now seen corresponding path program 1 times [2023-11-24 21:59:42,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:42,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439766801] [2023-11-24 21:59:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:42,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 167 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:43,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:43,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439766801] [2023-11-24 21:59:43,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439766801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:43,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267588441] [2023-11-24 21:59:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:43,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:43,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:43,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:43,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:59:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:43,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:59:43,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:44,477 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:59:44,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267588441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:44,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:59:44,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 21:59:44,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033716568] [2023-11-24 21:59:44,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:44,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:44,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:44,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:44,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:59:44,481 INFO L87 Difference]: Start difference. First operand 17971 states and 20986 transitions. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 3 states have internal predecessors, (290), 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 21:59:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:45,671 INFO L93 Difference]: Finished difference Result 33179 states and 38910 transitions. [2023-11-24 21:59:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:45,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 3 states have internal predecessors, (290), 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 290 [2023-11-24 21:59:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:45,701 INFO L225 Difference]: With dead ends: 33179 [2023-11-24 21:59:45,702 INFO L226 Difference]: Without dead ends: 17979 [2023-11-24 21:59:45,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 288 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 21:59:45,716 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 173 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:45,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 178 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 21:59:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17979 states. [2023-11-24 21:59:45,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17979 to 17971. [2023-11-24 21:59:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17971 states, 17970 states have (on average 1.1658319421257652) internal successors, (20950), 17970 states have internal predecessors, (20950), 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 21:59:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17971 states to 17971 states and 20950 transitions. [2023-11-24 21:59:46,090 INFO L78 Accepts]: Start accepts. Automaton has 17971 states and 20950 transitions. Word has length 290 [2023-11-24 21:59:46,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:46,090 INFO L495 AbstractCegarLoop]: Abstraction has 17971 states and 20950 transitions. [2023-11-24 21:59:46,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 3 states have internal predecessors, (290), 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 21:59:46,091 INFO L276 IsEmpty]: Start isEmpty. Operand 17971 states and 20950 transitions. [2023-11-24 21:59:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-11-24 21:59:46,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:46,107 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:46,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:46,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 21:59:46,313 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:46,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:46,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2004563935, now seen corresponding path program 1 times [2023-11-24 21:59:46,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:46,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27910944] [2023-11-24 21:59:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:46,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2023-11-24 21:59:46,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:46,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27910944] [2023-11-24 21:59:46,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27910944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:46,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:46,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:46,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531829245] [2023-11-24 21:59:46,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:46,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:46,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:46,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:46,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:46,770 INFO L87 Difference]: Start difference. First operand 17971 states and 20950 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 21:59:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:48,013 INFO L93 Difference]: Finished difference Result 37949 states and 44595 transitions. [2023-11-24 21:59:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:48,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 316 [2023-11-24 21:59:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:48,123 INFO L225 Difference]: With dead ends: 37949 [2023-11-24 21:59:48,123 INFO L226 Difference]: Without dead ends: 20347 [2023-11-24 21:59:48,130 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 21:59:48,131 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 126 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:48,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 151 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 21:59:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20347 states. [2023-11-24 21:59:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20347 to 17028. [2023-11-24 21:59:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17028 states, 17027 states have (on average 1.1329652904210958) internal successors, (19291), 17027 states have internal predecessors, (19291), 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 21:59:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17028 states to 17028 states and 19291 transitions. [2023-11-24 21:59:48,403 INFO L78 Accepts]: Start accepts. Automaton has 17028 states and 19291 transitions. Word has length 316 [2023-11-24 21:59:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:48,404 INFO L495 AbstractCegarLoop]: Abstraction has 17028 states and 19291 transitions. [2023-11-24 21:59:48,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 21:59:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 17028 states and 19291 transitions. [2023-11-24 21:59:48,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-11-24 21:59:48,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:48,417 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:48,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:59:48,418 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:48,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:48,419 INFO L85 PathProgramCache]: Analyzing trace with hash 691367451, now seen corresponding path program 1 times [2023-11-24 21:59:48,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:48,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466238524] [2023-11-24 21:59:48,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:48,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-11-24 21:59:48,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:48,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466238524] [2023-11-24 21:59:48,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466238524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:48,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:48,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040651427] [2023-11-24 21:59:48,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:48,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:48,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:48,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:48,799 INFO L87 Difference]: Start difference. First operand 17028 states and 19291 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 21:59:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:49,753 INFO L93 Difference]: Finished difference Result 35706 states and 40461 transitions. [2023-11-24 21:59:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 324 [2023-11-24 21:59:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:49,783 INFO L225 Difference]: With dead ends: 35706 [2023-11-24 21:59:49,783 INFO L226 Difference]: Without dead ends: 21075 [2023-11-24 21:59:49,794 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 21:59:49,795 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 163 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:49,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 149 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:59:49,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21075 states. [2023-11-24 21:59:50,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21075 to 17395. [2023-11-24 21:59:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17395 states, 17394 states have (on average 1.1333793262044383) internal successors, (19714), 17394 states have internal predecessors, (19714), 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 21:59:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17395 states to 17395 states and 19714 transitions. [2023-11-24 21:59:50,190 INFO L78 Accepts]: Start accepts. Automaton has 17395 states and 19714 transitions. Word has length 324 [2023-11-24 21:59:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:50,191 INFO L495 AbstractCegarLoop]: Abstraction has 17395 states and 19714 transitions. [2023-11-24 21:59:50,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 21:59:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 17395 states and 19714 transitions. [2023-11-24 21:59:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2023-11-24 21:59:50,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:50,206 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 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 21:59:50,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:59:50,207 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:50,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:50,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1079468631, now seen corresponding path program 1 times [2023-11-24 21:59:50,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:50,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814007294] [2023-11-24 21:59:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:50,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-24 21:59:51,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:51,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814007294] [2023-11-24 21:59:51,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814007294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:51,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:51,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:59:51,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156601606] [2023-11-24 21:59:51,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:51,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:51,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:51,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:51,150 INFO L87 Difference]: Start difference. First operand 17395 states and 19714 transitions. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 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 21:59:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:52,921 INFO L93 Difference]: Finished difference Result 40532 states and 46167 transitions. [2023-11-24 21:59:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:52,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 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 328 [2023-11-24 21:59:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:52,955 INFO L225 Difference]: With dead ends: 40532 [2023-11-24 21:59:52,955 INFO L226 Difference]: Without dead ends: 24793 [2023-11-24 21:59:52,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 21:59:52,971 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 290 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:52,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 391 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-24 21:59:52,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24793 states. [2023-11-24 21:59:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24793 to 20351. [2023-11-24 21:59:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20351 states, 20350 states have (on average 1.122899262899263) internal successors, (22851), 20350 states have internal predecessors, (22851), 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 21:59:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20351 states to 20351 states and 22851 transitions. [2023-11-24 21:59:53,379 INFO L78 Accepts]: Start accepts. Automaton has 20351 states and 22851 transitions. Word has length 328 [2023-11-24 21:59:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:53,380 INFO L495 AbstractCegarLoop]: Abstraction has 20351 states and 22851 transitions. [2023-11-24 21:59:53,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 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 21:59:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 20351 states and 22851 transitions. [2023-11-24 21:59:53,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2023-11-24 21:59:53,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:53,394 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-24 21:59:53,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:59:53,395 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:53,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1607525202, now seen corresponding path program 1 times [2023-11-24 21:59:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:53,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203775767] [2023-11-24 21:59:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:53,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:54,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:54,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203775767] [2023-11-24 21:59:54,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203775767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:54,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:54,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:54,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71473370] [2023-11-24 21:59:54,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:54,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:54,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:54,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:54,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:54,060 INFO L87 Difference]: Start difference. First operand 20351 states and 22851 transitions. Second operand has 4 states, 4 states have (on average 84.25) internal successors, (337), 3 states have internal predecessors, (337), 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 21:59:55,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:55,997 INFO L93 Difference]: Finished difference Result 46789 states and 52588 transitions. [2023-11-24 21:59:55,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:55,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 3 states have internal predecessors, (337), 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 337 [2023-11-24 21:59:55,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:56,036 INFO L225 Difference]: With dead ends: 46789 [2023-11-24 21:59:56,036 INFO L226 Difference]: Without dead ends: 26807 [2023-11-24 21:59:56,049 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 21:59:56,050 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 163 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:56,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 109 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-24 21:59:56,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26807 states. [2023-11-24 21:59:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26807 to 25511. [2023-11-24 21:59:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25511 states, 25510 states have (on average 1.1172089376715013) internal successors, (28500), 25510 states have internal predecessors, (28500), 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 21:59:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25511 states to 25511 states and 28500 transitions. [2023-11-24 21:59:56,516 INFO L78 Accepts]: Start accepts. Automaton has 25511 states and 28500 transitions. Word has length 337 [2023-11-24 21:59:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:56,517 INFO L495 AbstractCegarLoop]: Abstraction has 25511 states and 28500 transitions. [2023-11-24 21:59:56,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 3 states have internal predecessors, (337), 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 21:59:56,517 INFO L276 IsEmpty]: Start isEmpty. Operand 25511 states and 28500 transitions. [2023-11-24 21:59:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-24 21:59:56,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:56,530 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 21:59:56,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:59:56,530 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:56,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1464130001, now seen corresponding path program 1 times [2023-11-24 21:59:56,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:56,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899616209] [2023-11-24 21:59:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:56,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 174 proven. 167 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-24 21:59:57,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:57,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899616209] [2023-11-24 21:59:57,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899616209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:57,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813476714] [2023-11-24 21:59:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:57,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:57,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:57,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:57,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be7e9b-7760-4f3d-abb6-314590844b8c/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:59:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:57,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:59:57,981 INFO L285 TraceCheckSpWp]: Computing forward predicates...