./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.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_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a8265a1502e23b0364b9cd16198377a0ca498fc346156a58eeb954c0e23f901 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:20:41,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:20:41,224 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:20:41,228 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:20:41,229 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:20:41,252 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:20:41,253 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:20:41,254 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:20:41,255 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:20:41,255 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:20:41,256 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:20:41,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:20:41,257 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:20:41,258 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:20:41,258 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:20:41,259 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:20:41,260 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:20:41,260 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:20:41,261 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:20:41,261 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:20:41,262 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:20:41,262 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:20:41,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:20:41,263 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:20:41,264 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:20:41,264 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:20:41,265 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:20:41,265 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:20:41,266 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:20:41,266 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:20:41,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:20:41,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:20:41,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:20:41,268 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:20:41,268 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:20:41,269 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:20:41,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:20:41,269 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:20:41,269 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:20:41,269 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:20:41,270 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:20:41,270 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:20:41,270 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_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a8265a1502e23b0364b9cd16198377a0ca498fc346156a58eeb954c0e23f901 [2023-11-28 20:20:41,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:20:41,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:20:41,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:20:41,497 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:20:41,497 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:20:41,499 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c [2023-11-28 20:20:44,234 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:20:44,435 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:20:44,436 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c [2023-11-28 20:20:44,454 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/data/f856da956/236fcfe981c246269713b8c963d1d199/FLAG489763b40 [2023-11-28 20:20:44,469 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/data/f856da956/236fcfe981c246269713b8c963d1d199 [2023-11-28 20:20:44,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:20:44,473 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:20:44,475 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:20:44,475 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:20:44,480 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:20:44,481 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,482 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f48cdd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44, skipping insertion in model container [2023-11-28 20:20:44,482 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,518 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:20:44,725 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_01968486-dfc5-4317-b7ed-ba09f92eec04/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c[8209,8222] [2023-11-28 20:20:44,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:20:44,743 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:20:44,787 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_01968486-dfc5-4317-b7ed-ba09f92eec04/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.BOUNDED-8.pals.c[8209,8222] [2023-11-28 20:20:44,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:20:44,805 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:20:44,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44 WrapperNode [2023-11-28 20:20:44,806 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:20:44,807 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:20:44,807 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:20:44,807 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:20:44,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,824 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,852 INFO L138 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 274 [2023-11-28 20:20:44,853 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:20:44,853 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:20:44,854 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:20:44,854 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:20:44,866 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,869 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,884 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]. [2023-11-28 20:20:44,885 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,885 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,893 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,900 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,902 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,905 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:20:44,907 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:20:44,907 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:20:44,907 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:20:44,908 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (1/1) ... [2023-11-28 20:20:44,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:20:44,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:44,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:20:44,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:20:44,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:20:44,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:20:44,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:20:44,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:20:45,062 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:20:45,064 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:20:45,376 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:20:45,423 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:20:45,423 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 20:20:45,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:20:45 BoogieIcfgContainer [2023-11-28 20:20:45,424 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:20:45,427 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:20:45,427 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:20:45,430 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:20:45,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:20:44" (1/3) ... [2023-11-28 20:20:45,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd286a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:20:45, skipping insertion in model container [2023-11-28 20:20:45,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:20:44" (2/3) ... [2023-11-28 20:20:45,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd286a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:20:45, skipping insertion in model container [2023-11-28 20:20:45,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:20:45" (3/3) ... [2023-11-28 20:20:45,433 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c [2023-11-28 20:20:45,473 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:20:45,474 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:20:45,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:20:45,520 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;@a4d1bb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:20:45,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:20:45,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.7903225806451613) internal successors, (111), 63 states have internal predecessors, (111), 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) [2023-11-28 20:20:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-28 20:20:45,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:45,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:45,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:45,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:45,540 INFO L85 PathProgramCache]: Analyzing trace with hash -20322442, now seen corresponding path program 1 times [2023-11-28 20:20:45,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:45,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726048688] [2023-11-28 20:20:45,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:45,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:45,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:45,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726048688] [2023-11-28 20:20:45,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726048688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:45,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:45,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:20:45,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998299515] [2023-11-28 20:20:45,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:45,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:20:45,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:45,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:20:45,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:20:45,796 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.7903225806451613) internal successors, (111), 63 states have internal predecessors, (111), 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 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:20:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:45,828 INFO L93 Difference]: Finished difference Result 102 states and 172 transitions. [2023-11-28 20:20:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:20:45,831 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-28 20:20:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:45,840 INFO L225 Difference]: With dead ends: 102 [2023-11-28 20:20:45,841 INFO L226 Difference]: Without dead ends: 62 [2023-11-28 20:20:45,843 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 [2023-11-28 20:20:45,847 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:45,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 104 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-28 20:20:45,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-28 20:20:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.7377049180327868) internal successors, (106), 61 states have internal predecessors, (106), 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) [2023-11-28 20:20:45,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 106 transitions. [2023-11-28 20:20:45,888 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 106 transitions. Word has length 18 [2023-11-28 20:20:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:45,888 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 106 transitions. [2023-11-28 20:20:45,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:20:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 106 transitions. [2023-11-28 20:20:45,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-28 20:20:45,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:45,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:45,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:20:45,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:45,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:45,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1300186120, now seen corresponding path program 1 times [2023-11-28 20:20:45,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:45,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335289020] [2023-11-28 20:20:45,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:45,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:46,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:46,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335289020] [2023-11-28 20:20:46,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335289020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:46,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:46,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:20:46,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956419822] [2023-11-28 20:20:46,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:46,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:20:46,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:46,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:20:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:20:46,155 INFO L87 Difference]: Start difference. First operand 62 states and 106 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:20:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:46,223 INFO L93 Difference]: Finished difference Result 135 states and 221 transitions. [2023-11-28 20:20:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:20:46,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-28 20:20:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:46,226 INFO L225 Difference]: With dead ends: 135 [2023-11-28 20:20:46,226 INFO L226 Difference]: Without dead ends: 97 [2023-11-28 20:20:46,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:20:46,229 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 55 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:46,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 277 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:46,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-28 20:20:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 62. [2023-11-28 20:20:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 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) [2023-11-28 20:20:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2023-11-28 20:20:46,239 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 18 [2023-11-28 20:20:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:46,239 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2023-11-28 20:20:46,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:20:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2023-11-28 20:20:46,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-28 20:20:46,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:46,242 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] [2023-11-28 20:20:46,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:20:46,242 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:46,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:46,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1316975187, now seen corresponding path program 1 times [2023-11-28 20:20:46,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:46,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85862464] [2023-11-28 20:20:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:46,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:46,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:46,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85862464] [2023-11-28 20:20:46,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85862464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:46,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:46,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:20:46,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96930142] [2023-11-28 20:20:46,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:46,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:20:46,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:46,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:20:46,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:20:46,418 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:20:46,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:46,666 INFO L93 Difference]: Finished difference Result 342 states and 531 transitions. [2023-11-28 20:20:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:20:46,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-28 20:20:46,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:46,672 INFO L225 Difference]: With dead ends: 342 [2023-11-28 20:20:46,672 INFO L226 Difference]: Without dead ends: 307 [2023-11-28 20:20:46,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:20:46,674 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 494 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:46,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 716 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:20:46,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-28 20:20:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 95. [2023-11-28 20:20:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.446808510638298) internal successors, (136), 94 states have internal predecessors, (136), 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) [2023-11-28 20:20:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2023-11-28 20:20:46,693 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 40 [2023-11-28 20:20:46,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:46,694 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2023-11-28 20:20:46,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:20:46,694 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2023-11-28 20:20:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-28 20:20:46,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:46,696 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] [2023-11-28 20:20:46,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:20:46,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:46,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:46,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2133064515, now seen corresponding path program 1 times [2023-11-28 20:20:46,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:46,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857564643] [2023-11-28 20:20:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:46,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:46,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:46,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857564643] [2023-11-28 20:20:46,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857564643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:46,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:46,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:46,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200624685] [2023-11-28 20:20:46,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:46,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:46,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:46,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:46,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:46,773 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2023-11-28 20:20:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:46,797 INFO L93 Difference]: Finished difference Result 220 states and 335 transitions. [2023-11-28 20:20:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:46,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2023-11-28 20:20:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:46,799 INFO L225 Difference]: With dead ends: 220 [2023-11-28 20:20:46,799 INFO L226 Difference]: Without dead ends: 152 [2023-11-28 20:20:46,800 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 [2023-11-28 20:20:46,802 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 34 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:46,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 128 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-28 20:20:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2023-11-28 20:20:46,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.4899328859060403) internal successors, (222), 149 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:20:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 222 transitions. [2023-11-28 20:20:46,816 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 222 transitions. Word has length 42 [2023-11-28 20:20:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:46,817 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 222 transitions. [2023-11-28 20:20:46,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2023-11-28 20:20:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 222 transitions. [2023-11-28 20:20:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-28 20:20:46,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:46,820 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] [2023-11-28 20:20:46,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 20:20:46,821 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:46,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2135209467, now seen corresponding path program 1 times [2023-11-28 20:20:46,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:46,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956386306] [2023-11-28 20:20:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:46,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:47,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:47,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956386306] [2023-11-28 20:20:47,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956386306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:47,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:47,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:20:47,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295232028] [2023-11-28 20:20:47,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:47,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:20:47,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:47,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:20:47,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:20:47,050 INFO L87 Difference]: Start difference. First operand 150 states and 222 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-11-28 20:20:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:47,169 INFO L93 Difference]: Finished difference Result 275 states and 418 transitions. [2023-11-28 20:20:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:20:47,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 42 [2023-11-28 20:20:47,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:47,171 INFO L225 Difference]: With dead ends: 275 [2023-11-28 20:20:47,171 INFO L226 Difference]: Without dead ends: 152 [2023-11-28 20:20:47,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:20:47,173 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 164 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:47,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 227 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-28 20:20:47,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2023-11-28 20:20:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.476510067114094) internal successors, (220), 149 states have internal predecessors, (220), 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) [2023-11-28 20:20:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 220 transitions. [2023-11-28 20:20:47,184 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 220 transitions. Word has length 42 [2023-11-28 20:20:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:47,184 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 220 transitions. [2023-11-28 20:20:47,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2023-11-28 20:20:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 220 transitions. [2023-11-28 20:20:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-28 20:20:47,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:47,187 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] [2023-11-28 20:20:47,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 20:20:47,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:47,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1752940221, now seen corresponding path program 1 times [2023-11-28 20:20:47,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:47,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437294631] [2023-11-28 20:20:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:47,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:47,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:47,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437294631] [2023-11-28 20:20:47,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437294631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:47,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:47,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:20:47,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28667150] [2023-11-28 20:20:47,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:47,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:20:47,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:47,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:20:47,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:20:47,382 INFO L87 Difference]: Start difference. First operand 150 states and 220 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:20:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:47,409 INFO L93 Difference]: Finished difference Result 158 states and 229 transitions. [2023-11-28 20:20:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:20:47,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-28 20:20:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:47,411 INFO L225 Difference]: With dead ends: 158 [2023-11-28 20:20:47,412 INFO L226 Difference]: Without dead ends: 156 [2023-11-28 20:20:47,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:20:47,413 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 1 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:47,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 229 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-28 20:20:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2023-11-28 20:20:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.457516339869281) internal successors, (223), 153 states have internal predecessors, (223), 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) [2023-11-28 20:20:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 223 transitions. [2023-11-28 20:20:47,423 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 223 transitions. Word has length 43 [2023-11-28 20:20:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:47,424 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 223 transitions. [2023-11-28 20:20:47,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:20:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 223 transitions. [2023-11-28 20:20:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-28 20:20:47,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:47,427 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] [2023-11-28 20:20:47,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 20:20:47,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:47,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:47,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1574505819, now seen corresponding path program 1 times [2023-11-28 20:20:47,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:47,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515678453] [2023-11-28 20:20:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:47,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:47,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:47,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515678453] [2023-11-28 20:20:47,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515678453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:47,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:47,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:47,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514722205] [2023-11-28 20:20:47,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:47,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:47,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:47,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:47,485 INFO L87 Difference]: Start difference. First operand 154 states and 223 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-28 20:20:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:47,507 INFO L93 Difference]: Finished difference Result 292 states and 436 transitions. [2023-11-28 20:20:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:47,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2023-11-28 20:20:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:47,509 INFO L225 Difference]: With dead ends: 292 [2023-11-28 20:20:47,510 INFO L226 Difference]: Without dead ends: 220 [2023-11-28 20:20:47,510 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 [2023-11-28 20:20:47,511 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 46 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:47,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 176 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-28 20:20:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2023-11-28 20:20:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.4746543778801844) internal successors, (320), 217 states have internal predecessors, (320), 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) [2023-11-28 20:20:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 320 transitions. [2023-11-28 20:20:47,523 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 320 transitions. Word has length 44 [2023-11-28 20:20:47,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:47,523 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 320 transitions. [2023-11-28 20:20:47,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-28 20:20:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 320 transitions. [2023-11-28 20:20:47,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-28 20:20:47,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:47,525 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] [2023-11-28 20:20:47,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 20:20:47,525 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:47,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:47,526 INFO L85 PathProgramCache]: Analyzing trace with hash 988793691, now seen corresponding path program 1 times [2023-11-28 20:20:47,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:47,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989419100] [2023-11-28 20:20:47,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:47,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:47,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:47,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989419100] [2023-11-28 20:20:47,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989419100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:47,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:47,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:47,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437937607] [2023-11-28 20:20:47,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:47,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:47,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:47,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:47,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:47,580 INFO L87 Difference]: Start difference. First operand 218 states and 320 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-28 20:20:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:47,608 INFO L93 Difference]: Finished difference Result 572 states and 860 transitions. [2023-11-28 20:20:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:47,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2023-11-28 20:20:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:47,611 INFO L225 Difference]: With dead ends: 572 [2023-11-28 20:20:47,612 INFO L226 Difference]: Without dead ends: 383 [2023-11-28 20:20:47,612 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 [2023-11-28 20:20:47,613 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 42 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:47,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 176 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:47,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-11-28 20:20:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 381. [2023-11-28 20:20:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.4789473684210526) internal successors, (562), 380 states have internal predecessors, (562), 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) [2023-11-28 20:20:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 562 transitions. [2023-11-28 20:20:47,634 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 562 transitions. Word has length 44 [2023-11-28 20:20:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:47,635 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 562 transitions. [2023-11-28 20:20:47,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-28 20:20:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 562 transitions. [2023-11-28 20:20:47,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-28 20:20:47,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:47,636 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] [2023-11-28 20:20:47,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 20:20:47,637 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:47,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:47,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1877527131, now seen corresponding path program 1 times [2023-11-28 20:20:47,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:47,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155171776] [2023-11-28 20:20:47,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:47,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:47,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:47,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155171776] [2023-11-28 20:20:47,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155171776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:47,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:47,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:47,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517175856] [2023-11-28 20:20:47,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:47,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:47,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:47,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:47,694 INFO L87 Difference]: Start difference. First operand 381 states and 562 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-28 20:20:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:47,734 INFO L93 Difference]: Finished difference Result 1037 states and 1544 transitions. [2023-11-28 20:20:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2023-11-28 20:20:47,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:47,740 INFO L225 Difference]: With dead ends: 1037 [2023-11-28 20:20:47,740 INFO L226 Difference]: Without dead ends: 685 [2023-11-28 20:20:47,741 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 [2023-11-28 20:20:47,742 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 40 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:47,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 178 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2023-11-28 20:20:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 683. [2023-11-28 20:20:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 1.4633431085043989) internal successors, (998), 682 states have internal predecessors, (998), 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) [2023-11-28 20:20:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 998 transitions. [2023-11-28 20:20:47,776 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 998 transitions. Word has length 44 [2023-11-28 20:20:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:47,776 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 998 transitions. [2023-11-28 20:20:47,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-28 20:20:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 998 transitions. [2023-11-28 20:20:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-28 20:20:47,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:47,777 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] [2023-11-28 20:20:47,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 20:20:47,778 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:47,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:47,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1614449755, now seen corresponding path program 1 times [2023-11-28 20:20:47,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:47,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990885532] [2023-11-28 20:20:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:47,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:47,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:47,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990885532] [2023-11-28 20:20:47,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990885532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:47,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:47,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:47,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300503801] [2023-11-28 20:20:47,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:47,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:47,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:47,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:47,843 INFO L87 Difference]: Start difference. First operand 683 states and 998 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-28 20:20:47,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:47,899 INFO L93 Difference]: Finished difference Result 1895 states and 2768 transitions. [2023-11-28 20:20:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:47,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2023-11-28 20:20:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:47,906 INFO L225 Difference]: With dead ends: 1895 [2023-11-28 20:20:47,907 INFO L226 Difference]: Without dead ends: 1241 [2023-11-28 20:20:47,908 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 [2023-11-28 20:20:47,909 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 44 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:47,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 182 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2023-11-28 20:20:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1239. [2023-11-28 20:20:47,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.432956381260097) internal successors, (1774), 1238 states have internal predecessors, (1774), 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) [2023-11-28 20:20:47,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1774 transitions. [2023-11-28 20:20:47,970 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1774 transitions. Word has length 44 [2023-11-28 20:20:47,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:47,970 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1774 transitions. [2023-11-28 20:20:47,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-28 20:20:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1774 transitions. [2023-11-28 20:20:47,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-28 20:20:47,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:47,972 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:47,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 20:20:47,972 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:47,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:47,972 INFO L85 PathProgramCache]: Analyzing trace with hash -712030863, now seen corresponding path program 1 times [2023-11-28 20:20:47,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:47,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116071045] [2023-11-28 20:20:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:47,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:20:48,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:48,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116071045] [2023-11-28 20:20:48,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116071045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:48,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:48,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:20:48,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861411762] [2023-11-28 20:20:48,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:48,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:20:48,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:48,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:20:48,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:20:48,115 INFO L87 Difference]: Start difference. First operand 1239 states and 1774 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2023-11-28 20:20:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:48,407 INFO L93 Difference]: Finished difference Result 6001 states and 8635 transitions. [2023-11-28 20:20:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:20:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 60 [2023-11-28 20:20:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:48,436 INFO L225 Difference]: With dead ends: 6001 [2023-11-28 20:20:48,437 INFO L226 Difference]: Without dead ends: 5135 [2023-11-28 20:20:48,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:20:48,440 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 321 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:48,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 422 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:20:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5135 states. [2023-11-28 20:20:48,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5135 to 2279. [2023-11-28 20:20:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 1.4284460052677788) internal successors, (3254), 2278 states have internal predecessors, (3254), 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) [2023-11-28 20:20:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3254 transitions. [2023-11-28 20:20:48,598 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3254 transitions. Word has length 60 [2023-11-28 20:20:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:48,599 INFO L495 AbstractCegarLoop]: Abstraction has 2279 states and 3254 transitions. [2023-11-28 20:20:48,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2023-11-28 20:20:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3254 transitions. [2023-11-28 20:20:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-28 20:20:48,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:48,601 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:48,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-28 20:20:48,601 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:48,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:48,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1297742991, now seen corresponding path program 1 times [2023-11-28 20:20:48,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:48,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061879017] [2023-11-28 20:20:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:48,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:20:48,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:48,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061879017] [2023-11-28 20:20:48,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061879017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:48,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:48,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:20:48,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110618085] [2023-11-28 20:20:48,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:48,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:20:48,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:48,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:20:48,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:20:48,746 INFO L87 Difference]: Start difference. First operand 2279 states and 3254 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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) [2023-11-28 20:20:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:49,001 INFO L93 Difference]: Finished difference Result 7209 states and 10363 transitions. [2023-11-28 20:20:49,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:20:49,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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 60 [2023-11-28 20:20:49,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:49,027 INFO L225 Difference]: With dead ends: 7209 [2023-11-28 20:20:49,027 INFO L226 Difference]: Without dead ends: 5999 [2023-11-28 20:20:49,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:20:49,030 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 358 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:49,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 427 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:20:49,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5999 states. [2023-11-28 20:20:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5999 to 3919. [2023-11-28 20:20:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 1.4247064828994385) internal successors, (5582), 3918 states have internal predecessors, (5582), 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) [2023-11-28 20:20:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 5582 transitions. [2023-11-28 20:20:49,256 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 5582 transitions. Word has length 60 [2023-11-28 20:20:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:49,256 INFO L495 AbstractCegarLoop]: Abstraction has 3919 states and 5582 transitions. [2023-11-28 20:20:49,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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) [2023-11-28 20:20:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 5582 transitions. [2023-11-28 20:20:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-28 20:20:49,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:49,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:49,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-28 20:20:49,259 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:49,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:49,260 INFO L85 PathProgramCache]: Analyzing trace with hash -409009551, now seen corresponding path program 1 times [2023-11-28 20:20:49,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:49,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410617171] [2023-11-28 20:20:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:49,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-28 20:20:49,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:49,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410617171] [2023-11-28 20:20:49,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410617171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:49,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:49,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:20:49,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889818664] [2023-11-28 20:20:49,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:49,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:20:49,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:49,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:20:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:20:49,383 INFO L87 Difference]: Start difference. First operand 3919 states and 5582 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2023-11-28 20:20:49,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:49,744 INFO L93 Difference]: Finished difference Result 8417 states and 12083 transitions. [2023-11-28 20:20:49,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:20:49,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 60 [2023-11-28 20:20:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:49,783 INFO L225 Difference]: With dead ends: 8417 [2023-11-28 20:20:49,783 INFO L226 Difference]: Without dead ends: 7207 [2023-11-28 20:20:49,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:20:49,787 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 353 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:49,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 441 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:20:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7207 states. [2023-11-28 20:20:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7207 to 5127. [2023-11-28 20:20:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5127 states, 5126 states have (on average 1.424502536090519) internal successors, (7302), 5126 states have internal predecessors, (7302), 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) [2023-11-28 20:20:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5127 states to 5127 states and 7302 transitions. [2023-11-28 20:20:50,067 INFO L78 Accepts]: Start accepts. Automaton has 5127 states and 7302 transitions. Word has length 60 [2023-11-28 20:20:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:50,067 INFO L495 AbstractCegarLoop]: Abstraction has 5127 states and 7302 transitions. [2023-11-28 20:20:50,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2023-11-28 20:20:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 5127 states and 7302 transitions. [2023-11-28 20:20:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-28 20:20:50,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:50,069 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:50,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-28 20:20:50,069 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:50,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:50,069 INFO L85 PathProgramCache]: Analyzing trace with hash -672086927, now seen corresponding path program 1 times [2023-11-28 20:20:50,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:50,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978490376] [2023-11-28 20:20:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:50,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 20:20:50,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:50,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978490376] [2023-11-28 20:20:50,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978490376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:50,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:50,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:20:50,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251046554] [2023-11-28 20:20:50,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:50,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:20:50,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:50,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:20:50,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:20:50,189 INFO L87 Difference]: Start difference. First operand 5127 states and 7302 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2023-11-28 20:20:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:50,557 INFO L93 Difference]: Finished difference Result 9625 states and 13803 transitions. [2023-11-28 20:20:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:20:50,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 60 [2023-11-28 20:20:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:50,590 INFO L225 Difference]: With dead ends: 9625 [2023-11-28 20:20:50,590 INFO L226 Difference]: Without dead ends: 8415 [2023-11-28 20:20:50,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:20:50,594 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 323 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:50,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 473 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:20:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8415 states. [2023-11-28 20:20:50,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8415 to 6335. [2023-11-28 20:20:50,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6335 states, 6334 states have (on average 1.4243763814335333) internal successors, (9022), 6334 states have internal predecessors, (9022), 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) [2023-11-28 20:20:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 9022 transitions. [2023-11-28 20:20:50,866 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 9022 transitions. Word has length 60 [2023-11-28 20:20:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:50,866 INFO L495 AbstractCegarLoop]: Abstraction has 6335 states and 9022 transitions. [2023-11-28 20:20:50,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2023-11-28 20:20:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 9022 transitions. [2023-11-28 20:20:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-28 20:20:50,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:50,868 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 20:20:50,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-28 20:20:50,869 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:50,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:50,869 INFO L85 PathProgramCache]: Analyzing trace with hash 429122550, now seen corresponding path program 1 times [2023-11-28 20:20:50,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:50,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547563200] [2023-11-28 20:20:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:50,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:50,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:50,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547563200] [2023-11-28 20:20:50,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547563200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:50,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:50,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:50,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432987810] [2023-11-28 20:20:50,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:50,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:50,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:50,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:50,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:50,943 INFO L87 Difference]: Start difference. First operand 6335 states and 9022 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-28 20:20:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:51,207 INFO L93 Difference]: Finished difference Result 12643 states and 18016 transitions. [2023-11-28 20:20:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:51,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 61 [2023-11-28 20:20:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:51,219 INFO L225 Difference]: With dead ends: 12643 [2023-11-28 20:20:51,219 INFO L226 Difference]: Without dead ends: 6337 [2023-11-28 20:20:51,225 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 [2023-11-28 20:20:51,226 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 37 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:51,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 176 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2023-11-28 20:20:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 6335. [2023-11-28 20:20:51,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6335 states, 6334 states have (on average 1.4047994947900222) internal successors, (8898), 6334 states have internal predecessors, (8898), 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) [2023-11-28 20:20:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 8898 transitions. [2023-11-28 20:20:51,459 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 8898 transitions. Word has length 61 [2023-11-28 20:20:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:51,459 INFO L495 AbstractCegarLoop]: Abstraction has 6335 states and 8898 transitions. [2023-11-28 20:20:51,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-28 20:20:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 8898 transitions. [2023-11-28 20:20:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-28 20:20:51,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:51,461 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 20:20:51,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-28 20:20:51,461 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:51,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1906964633, now seen corresponding path program 1 times [2023-11-28 20:20:51,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:51,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708961419] [2023-11-28 20:20:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:51,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:51,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:51,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708961419] [2023-11-28 20:20:51,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708961419] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:51,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:51,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:51,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076095752] [2023-11-28 20:20:51,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:51,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:51,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:51,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:51,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:51,529 INFO L87 Difference]: Start difference. First operand 6335 states and 8898 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:20:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:51,624 INFO L93 Difference]: Finished difference Result 8731 states and 12305 transitions. [2023-11-28 20:20:51,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:51,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-28 20:20:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:51,630 INFO L225 Difference]: With dead ends: 8731 [2023-11-28 20:20:51,630 INFO L226 Difference]: Without dead ends: 2425 [2023-11-28 20:20:51,637 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 [2023-11-28 20:20:51,638 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 31 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:51,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 173 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2023-11-28 20:20:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2418. [2023-11-28 20:20:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 1.4004964832436906) internal successors, (3385), 2417 states have internal predecessors, (3385), 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) [2023-11-28 20:20:51,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 3385 transitions. [2023-11-28 20:20:51,761 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 3385 transitions. Word has length 62 [2023-11-28 20:20:51,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:51,762 INFO L495 AbstractCegarLoop]: Abstraction has 2418 states and 3385 transitions. [2023-11-28 20:20:51,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:20:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 3385 transitions. [2023-11-28 20:20:51,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-28 20:20:51,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:51,763 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:51,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-28 20:20:51,763 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:51,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:51,763 INFO L85 PathProgramCache]: Analyzing trace with hash 438272804, now seen corresponding path program 1 times [2023-11-28 20:20:51,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:51,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968619854] [2023-11-28 20:20:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:51,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:51,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:51,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968619854] [2023-11-28 20:20:51,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968619854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:51,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:51,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:51,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172854441] [2023-11-28 20:20:51,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:51,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:51,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:51,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:51,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:51,832 INFO L87 Difference]: Start difference. First operand 2418 states and 3385 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-28 20:20:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:51,874 INFO L93 Difference]: Finished difference Result 3610 states and 5059 transitions. [2023-11-28 20:20:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:51,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-28 20:20:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:51,877 INFO L225 Difference]: With dead ends: 3610 [2023-11-28 20:20:51,877 INFO L226 Difference]: Without dead ends: 1232 [2023-11-28 20:20:51,879 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 [2023-11-28 20:20:51,879 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 33 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:51,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 152 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2023-11-28 20:20:51,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1230. [2023-11-28 20:20:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.3759153783563873) internal successors, (1691), 1229 states have internal predecessors, (1691), 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) [2023-11-28 20:20:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1691 transitions. [2023-11-28 20:20:51,914 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1691 transitions. Word has length 63 [2023-11-28 20:20:51,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:51,915 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1691 transitions. [2023-11-28 20:20:51,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-28 20:20:51,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1691 transitions. [2023-11-28 20:20:51,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-28 20:20:51,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:51,916 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 20:20:51,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-28 20:20:51,916 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:51,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:51,916 INFO L85 PathProgramCache]: Analyzing trace with hash 888337362, now seen corresponding path program 1 times [2023-11-28 20:20:51,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:51,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508926076] [2023-11-28 20:20:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:51,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:51,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:51,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508926076] [2023-11-28 20:20:51,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508926076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:20:51,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:20:51,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:20:51,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559923810] [2023-11-28 20:20:51,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:20:51,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:20:51,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:20:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:20:51,982 INFO L87 Difference]: Start difference. First operand 1230 states and 1691 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2023-11-28 20:20:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:52,008 INFO L93 Difference]: Finished difference Result 1828 states and 2518 transitions. [2023-11-28 20:20:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:20:52,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2023-11-28 20:20:52,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:52,010 INFO L225 Difference]: With dead ends: 1828 [2023-11-28 20:20:52,010 INFO L226 Difference]: Without dead ends: 638 [2023-11-28 20:20:52,011 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 [2023-11-28 20:20:52,011 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 30 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:52,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 137 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:20:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2023-11-28 20:20:52,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 636. [2023-11-28 20:20:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.3464566929133859) internal successors, (855), 635 states have internal predecessors, (855), 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) [2023-11-28 20:20:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 855 transitions. [2023-11-28 20:20:52,045 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 855 transitions. Word has length 65 [2023-11-28 20:20:52,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:52,045 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 855 transitions. [2023-11-28 20:20:52,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2023-11-28 20:20:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 855 transitions. [2023-11-28 20:20:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-28 20:20:52,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:52,047 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 20:20:52,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-28 20:20:52,047 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:52,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1624577536, now seen corresponding path program 1 times [2023-11-28 20:20:52,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:52,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371317159] [2023-11-28 20:20:52,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:52,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:20:52,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:52,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371317159] [2023-11-28 20:20:52,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371317159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:20:52,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832468174] [2023-11-28 20:20:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:52,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:52,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:52,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:52,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:20:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:52,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:20:52,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:52,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:20:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:52,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832468174] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:20:52,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:20:52,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-11-28 20:20:52,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004296962] [2023-11-28 20:20:52,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:20:52,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:20:52,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:52,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:20:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-11-28 20:20:52,961 INFO L87 Difference]: Start difference. First operand 636 states and 855 transitions. Second operand has 12 states, 12 states have (on average 15.833333333333334) internal successors, (190), 12 states have internal predecessors, (190), 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) [2023-11-28 20:20:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:53,239 INFO L93 Difference]: Finished difference Result 2616 states and 3524 transitions. [2023-11-28 20:20:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:20:53,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.833333333333334) internal successors, (190), 12 states have internal predecessors, (190), 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 67 [2023-11-28 20:20:53,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:53,243 INFO L225 Difference]: With dead ends: 2616 [2023-11-28 20:20:53,244 INFO L226 Difference]: Without dead ends: 1996 [2023-11-28 20:20:53,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:20:53,246 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 290 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:53,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 619 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:20:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2023-11-28 20:20:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1947. [2023-11-28 20:20:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1946 states have (on average 1.3088386433710175) internal successors, (2547), 1946 states have internal predecessors, (2547), 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) [2023-11-28 20:20:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2547 transitions. [2023-11-28 20:20:53,344 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2547 transitions. Word has length 67 [2023-11-28 20:20:53,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:53,345 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 2547 transitions. [2023-11-28 20:20:53,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.833333333333334) internal successors, (190), 12 states have internal predecessors, (190), 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) [2023-11-28 20:20:53,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2547 transitions. [2023-11-28 20:20:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-28 20:20:53,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:53,346 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 20:20:53,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:20:53,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:53,547 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:53,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:53,547 INFO L85 PathProgramCache]: Analyzing trace with hash 385389775, now seen corresponding path program 1 times [2023-11-28 20:20:53,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:53,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771525412] [2023-11-28 20:20:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:53,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:54,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:54,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771525412] [2023-11-28 20:20:54,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771525412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:20:54,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047171122] [2023-11-28 20:20:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:54,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:54,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:54,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:54,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:20:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:54,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:20:54,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:54,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:20:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:55,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047171122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:20:55,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:20:55,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-28 20:20:55,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947443397] [2023-11-28 20:20:55,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:20:55,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 20:20:55,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:20:55,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 20:20:55,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:20:55,674 INFO L87 Difference]: Start difference. First operand 1947 states and 2547 transitions. Second operand has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 22 states have internal predecessors, (168), 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) [2023-11-28 20:20:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:20:57,615 INFO L93 Difference]: Finished difference Result 9817 states and 12822 transitions. [2023-11-28 20:20:57,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-28 20:20:57,616 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 22 states have internal predecessors, (168), 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 68 [2023-11-28 20:20:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:20:57,626 INFO L225 Difference]: With dead ends: 9817 [2023-11-28 20:20:57,626 INFO L226 Difference]: Without dead ends: 7930 [2023-11-28 20:20:57,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=519, Invalid=2237, Unknown=0, NotChecked=0, Total=2756 [2023-11-28 20:20:57,631 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1431 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:20:57,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1431 Valid, 825 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:20:57,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7930 states. [2023-11-28 20:20:57,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7930 to 7438. [2023-11-28 20:20:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 7437 states have (on average 1.2830442382681189) internal successors, (9542), 7437 states have internal predecessors, (9542), 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) [2023-11-28 20:20:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 9542 transitions. [2023-11-28 20:20:57,948 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 9542 transitions. Word has length 68 [2023-11-28 20:20:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:20:57,948 INFO L495 AbstractCegarLoop]: Abstraction has 7438 states and 9542 transitions. [2023-11-28 20:20:57,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 22 states have internal predecessors, (168), 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) [2023-11-28 20:20:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 9542 transitions. [2023-11-28 20:20:57,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-28 20:20:57,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:20:57,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:20:57,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-28 20:20:58,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:58,151 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:20:58,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:20:58,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1811367197, now seen corresponding path program 1 times [2023-11-28 20:20:58,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:20:58,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885415392] [2023-11-28 20:20:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:58,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:20:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:58,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:20:58,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885415392] [2023-11-28 20:20:58,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885415392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:20:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021119122] [2023-11-28 20:20:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:20:58,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:20:58,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:20:58,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:20:58,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:20:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:20:58,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-28 20:20:58,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:20:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:20:59,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:00,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021119122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:00,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:00,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-28 20:21:00,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985677089] [2023-11-28 20:21:00,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:00,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 20:21:00,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:00,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 20:21:00,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:21:00,156 INFO L87 Difference]: Start difference. First operand 7438 states and 9542 transitions. Second operand has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 18 states have internal predecessors, (157), 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) [2023-11-28 20:21:00,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:00,908 INFO L93 Difference]: Finished difference Result 21878 states and 28082 transitions. [2023-11-28 20:21:00,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:21:00,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 18 states have internal predecessors, (157), 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 68 [2023-11-28 20:21:00,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:00,937 INFO L225 Difference]: With dead ends: 21878 [2023-11-28 20:21:00,937 INFO L226 Difference]: Without dead ends: 15581 [2023-11-28 20:21:00,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:21:00,948 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 413 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:00,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 378 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:21:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15581 states. [2023-11-28 20:21:01,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15581 to 14849. [2023-11-28 20:21:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14849 states, 14848 states have (on average 1.2646821120689655) internal successors, (18778), 14848 states have internal predecessors, (18778), 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) [2023-11-28 20:21:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14849 states to 14849 states and 18778 transitions. [2023-11-28 20:21:01,487 INFO L78 Accepts]: Start accepts. Automaton has 14849 states and 18778 transitions. Word has length 68 [2023-11-28 20:21:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:01,488 INFO L495 AbstractCegarLoop]: Abstraction has 14849 states and 18778 transitions. [2023-11-28 20:21:01,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 18 states have internal predecessors, (157), 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) [2023-11-28 20:21:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 14849 states and 18778 transitions. [2023-11-28 20:21:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-28 20:21:01,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:01,489 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 20:21:01,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:21:01,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:01,690 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:01,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1542445746, now seen corresponding path program 1 times [2023-11-28 20:21:01,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:01,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319332001] [2023-11-28 20:21:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:02,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:02,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319332001] [2023-11-28 20:21:02,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319332001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:02,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101307936] [2023-11-28 20:21:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:02,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:02,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:02,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:02,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:21:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:02,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 20:21:02,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:02,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:03,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101307936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:03,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:03,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 30 [2023-11-28 20:21:03,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889656833] [2023-11-28 20:21:03,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:03,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-28 20:21:03,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:03,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-28 20:21:03,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2023-11-28 20:21:03,806 INFO L87 Difference]: Start difference. First operand 14849 states and 18778 transitions. Second operand has 31 states, 31 states have (on average 5.774193548387097) internal successors, (179), 30 states have internal predecessors, (179), 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) [2023-11-28 20:21:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:05,378 INFO L93 Difference]: Finished difference Result 44914 states and 56753 transitions. [2023-11-28 20:21:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-28 20:21:05,378 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.774193548387097) internal successors, (179), 30 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-28 20:21:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:05,428 INFO L225 Difference]: With dead ends: 44914 [2023-11-28 20:21:05,428 INFO L226 Difference]: Without dead ends: 31813 [2023-11-28 20:21:05,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2023-11-28 20:21:05,445 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 516 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:05,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 516 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:21:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31813 states. [2023-11-28 20:21:06,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31813 to 29737. [2023-11-28 20:21:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29737 states, 29736 states have (on average 1.2487220877051386) internal successors, (37132), 29736 states have internal predecessors, (37132), 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) [2023-11-28 20:21:06,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29737 states to 29737 states and 37132 transitions. [2023-11-28 20:21:06,466 INFO L78 Accepts]: Start accepts. Automaton has 29737 states and 37132 transitions. Word has length 69 [2023-11-28 20:21:06,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:06,467 INFO L495 AbstractCegarLoop]: Abstraction has 29737 states and 37132 transitions. [2023-11-28 20:21:06,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.774193548387097) internal successors, (179), 30 states have internal predecessors, (179), 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) [2023-11-28 20:21:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 29737 states and 37132 transitions. [2023-11-28 20:21:06,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-28 20:21:06,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:06,469 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 20:21:06,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:21:06,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:06,670 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:06,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:06,670 INFO L85 PathProgramCache]: Analyzing trace with hash -129186099, now seen corresponding path program 1 times [2023-11-28 20:21:06,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:06,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033866158] [2023-11-28 20:21:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:06,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:08,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:08,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033866158] [2023-11-28 20:21:08,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033866158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:08,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741509046] [2023-11-28 20:21:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:08,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:08,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:08,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:08,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:21:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:09,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-28 20:21:09,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:13,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:18,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741509046] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:18,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:18,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 21] total 65 [2023-11-28 20:21:18,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667174702] [2023-11-28 20:21:18,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:18,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-28 20:21:18,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:18,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-28 20:21:18,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=3838, Unknown=0, NotChecked=0, Total=4160 [2023-11-28 20:21:18,180 INFO L87 Difference]: Start difference. First operand 29737 states and 37132 transitions. Second operand has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 65 states have internal predecessors, (198), 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) [2023-11-28 20:26:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:26:36,981 INFO L93 Difference]: Finished difference Result 88741 states and 111621 transitions. [2023-11-28 20:26:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 496 states. [2023-11-28 20:26:36,982 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 65 states have internal predecessors, (198), 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 70 [2023-11-28 20:26:36,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:26:37,054 INFO L225 Difference]: With dead ends: 88741 [2023-11-28 20:26:37,054 INFO L226 Difference]: Without dead ends: 70210 [2023-11-28 20:26:37,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 557 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130754 ImplicationChecksByTransitivity, 306.8s TimeCoverageRelationStatistics Valid=30616, Invalid=281306, Unknown=0, NotChecked=0, Total=311922 [2023-11-28 20:26:37,113 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 6844 mSDsluCounter, 5633 mSDsCounter, 0 mSdLazyCounter, 8869 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6844 SdHoareTripleChecker+Valid, 5783 SdHoareTripleChecker+Invalid, 9188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 8869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:26:37,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6844 Valid, 5783 Invalid, 9188 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [319 Valid, 8869 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2023-11-28 20:26:37,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70210 states. [2023-11-28 20:26:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70210 to 40374. [2023-11-28 20:26:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40374 states, 40373 states have (on average 1.257845589874421) internal successors, (50783), 40373 states have internal predecessors, (50783), 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) [2023-11-28 20:26:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40374 states to 40374 states and 50783 transitions. [2023-11-28 20:26:39,873 INFO L78 Accepts]: Start accepts. Automaton has 40374 states and 50783 transitions. Word has length 70 [2023-11-28 20:26:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:26:39,873 INFO L495 AbstractCegarLoop]: Abstraction has 40374 states and 50783 transitions. [2023-11-28 20:26:39,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 65 states have internal predecessors, (198), 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) [2023-11-28 20:26:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 40374 states and 50783 transitions. [2023-11-28 20:26:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-28 20:26:39,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:26:39,875 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-28 20:26:39,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:26:40,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:26:40,076 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:26:40,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:26:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash -782778732, now seen corresponding path program 1 times [2023-11-28 20:26:40,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:26:40,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117743874] [2023-11-28 20:26:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:40,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:26:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:26:40,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:26:40,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117743874] [2023-11-28 20:26:40,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117743874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:26:40,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215605592] [2023-11-28 20:26:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:40,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:26:40,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:26:40,987 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:26:40,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:26:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:41,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-28 20:26:41,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:26:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:26:41,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:26:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:26:43,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215605592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:26:43,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:26:43,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2023-11-28 20:26:43,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039264925] [2023-11-28 20:26:43,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:26:43,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-28 20:26:43,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:26:43,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-28 20:26:43,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2023-11-28 20:26:43,403 INFO L87 Difference]: Start difference. First operand 40374 states and 50783 transitions. Second operand has 30 states, 30 states have (on average 5.533333333333333) internal successors, (166), 29 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:26:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:26:47,249 INFO L93 Difference]: Finished difference Result 56291 states and 69982 transitions. [2023-11-28 20:26:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:26:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.533333333333333) internal successors, (166), 29 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-28 20:26:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:26:47,283 INFO L225 Difference]: With dead ends: 56291 [2023-11-28 20:26:47,284 INFO L226 Difference]: Without dead ends: 40297 [2023-11-28 20:26:47,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-11-28 20:26:47,291 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 916 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:26:47,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 714 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:26:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40297 states. [2023-11-28 20:26:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40297 to 34264. [2023-11-28 20:26:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34264 states, 34263 states have (on average 1.2530134547471032) internal successors, (42932), 34263 states have internal predecessors, (42932), 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) [2023-11-28 20:26:49,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34264 states to 34264 states and 42932 transitions. [2023-11-28 20:26:49,749 INFO L78 Accepts]: Start accepts. Automaton has 34264 states and 42932 transitions. Word has length 71 [2023-11-28 20:26:49,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:26:49,750 INFO L495 AbstractCegarLoop]: Abstraction has 34264 states and 42932 transitions. [2023-11-28 20:26:49,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.533333333333333) internal successors, (166), 29 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:26:49,750 INFO L276 IsEmpty]: Start isEmpty. Operand 34264 states and 42932 transitions. [2023-11-28 20:26:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-28 20:26:49,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:26:49,751 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:26:49,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:26:49,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-28 20:26:49,952 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:26:49,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:26:49,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1853670651, now seen corresponding path program 1 times [2023-11-28 20:26:49,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:26:49,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119398856] [2023-11-28 20:26:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:49,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:26:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:26:50,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:26:50,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119398856] [2023-11-28 20:26:50,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119398856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:26:50,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344898057] [2023-11-28 20:26:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:50,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:26:50,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:26:50,553 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:26:50,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:26:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:50,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:26:50,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:26:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:26:51,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:26:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:26:52,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344898057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:26:52,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:26:52,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2023-11-28 20:26:52,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596704990] [2023-11-28 20:26:52,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:26:52,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-28 20:26:52,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:26:52,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-28 20:26:52,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2023-11-28 20:26:52,274 INFO L87 Difference]: Start difference. First operand 34264 states and 42932 transitions. Second operand has 29 states, 29 states have (on average 5.586206896551724) internal successors, (162), 28 states have internal predecessors, (162), 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) [2023-11-28 20:26:55,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:26:55,692 INFO L93 Difference]: Finished difference Result 48072 states and 60142 transitions. [2023-11-28 20:26:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-28 20:26:55,693 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.586206896551724) internal successors, (162), 28 states have internal predecessors, (162), 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 72 [2023-11-28 20:26:55,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:26:55,720 INFO L225 Difference]: With dead ends: 48072 [2023-11-28 20:26:55,720 INFO L226 Difference]: Without dead ends: 33750 [2023-11-28 20:26:55,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=483, Invalid=1773, Unknown=0, NotChecked=0, Total=2256 [2023-11-28 20:26:55,730 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1124 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:26:55,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 932 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:26:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33750 states. [2023-11-28 20:26:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33750 to 24694. [2023-11-28 20:26:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24694 states, 24693 states have (on average 1.2551735309601912) internal successors, (30994), 24693 states have internal predecessors, (30994), 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) [2023-11-28 20:26:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24694 states to 24694 states and 30994 transitions. [2023-11-28 20:26:57,850 INFO L78 Accepts]: Start accepts. Automaton has 24694 states and 30994 transitions. Word has length 72 [2023-11-28 20:26:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:26:57,850 INFO L495 AbstractCegarLoop]: Abstraction has 24694 states and 30994 transitions. [2023-11-28 20:26:57,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.586206896551724) internal successors, (162), 28 states have internal predecessors, (162), 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) [2023-11-28 20:26:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 24694 states and 30994 transitions. [2023-11-28 20:26:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-28 20:26:57,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:26:57,856 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-11-28 20:26:57,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:26:58,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-28 20:26:58,057 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:26:58,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:26:58,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1701316515, now seen corresponding path program 1 times [2023-11-28 20:26:58,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:26:58,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684727732] [2023-11-28 20:26:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:58,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:26:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:26:59,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:26:59,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684727732] [2023-11-28 20:26:59,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684727732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:26:59,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174332970] [2023-11-28 20:26:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:59,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:26:59,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:26:59,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:26:59,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:26:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:59,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:26:59,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:00,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:02,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174332970] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:02,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:02,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-11-28 20:27:02,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469612373] [2023-11-28 20:27:02,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:02,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-28 20:27:02,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:02,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-28 20:27:02,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2023-11-28 20:27:02,209 INFO L87 Difference]: Start difference. First operand 24694 states and 30994 transitions. Second operand has 36 states, 36 states have (on average 8.555555555555555) internal successors, (308), 35 states have internal predecessors, (308), 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) [2023-11-28 20:27:15,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:15,420 INFO L93 Difference]: Finished difference Result 58376 states and 73309 transitions. [2023-11-28 20:27:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-11-28 20:27:15,420 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 8.555555555555555) internal successors, (308), 35 states have internal predecessors, (308), 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 112 [2023-11-28 20:27:15,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:15,451 INFO L225 Difference]: With dead ends: 58376 [2023-11-28 20:27:15,452 INFO L226 Difference]: Without dead ends: 37720 [2023-11-28 20:27:15,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11013 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=4661, Invalid=28645, Unknown=0, NotChecked=0, Total=33306 [2023-11-28 20:27:15,465 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 2647 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2647 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:27:15,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2647 Valid, 1653 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-28 20:27:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37720 states. [2023-11-28 20:27:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37720 to 24694. [2023-11-28 20:27:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24694 states, 24693 states have (on average 1.2318470821690357) internal successors, (30418), 24693 states have internal predecessors, (30418), 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) [2023-11-28 20:27:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24694 states to 24694 states and 30418 transitions. [2023-11-28 20:27:17,538 INFO L78 Accepts]: Start accepts. Automaton has 24694 states and 30418 transitions. Word has length 112 [2023-11-28 20:27:17,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:17,539 INFO L495 AbstractCegarLoop]: Abstraction has 24694 states and 30418 transitions. [2023-11-28 20:27:17,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 8.555555555555555) internal successors, (308), 35 states have internal predecessors, (308), 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) [2023-11-28 20:27:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 24694 states and 30418 transitions. [2023-11-28 20:27:17,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-28 20:27:17,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:17,546 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2023-11-28 20:27:17,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:27:17,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-28 20:27:17,747 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:17,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:17,747 INFO L85 PathProgramCache]: Analyzing trace with hash -736574223, now seen corresponding path program 1 times [2023-11-28 20:27:17,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:17,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067764653] [2023-11-28 20:27:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:17,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 30 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:18,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:18,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067764653] [2023-11-28 20:27:18,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067764653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:18,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161003614] [2023-11-28 20:27:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:18,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:18,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:18,797 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:18,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:27:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:18,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 20:27:18,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:19,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:21,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161003614] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:21,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:21,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 34 [2023-11-28 20:27:21,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363443541] [2023-11-28 20:27:21,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:21,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-28 20:27:21,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:21,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-28 20:27:21,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 20:27:21,666 INFO L87 Difference]: Start difference. First operand 24694 states and 30418 transitions. Second operand has 35 states, 35 states have (on average 9.257142857142858) internal successors, (324), 34 states have internal predecessors, (324), 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) [2023-11-28 20:27:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:27:39,367 INFO L93 Difference]: Finished difference Result 52244 states and 65127 transitions. [2023-11-28 20:27:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-11-28 20:27:39,367 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 9.257142857142858) internal successors, (324), 34 states have internal predecessors, (324), 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 112 [2023-11-28 20:27:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:27:39,396 INFO L225 Difference]: With dead ends: 52244 [2023-11-28 20:27:39,397 INFO L226 Difference]: Without dead ends: 35386 [2023-11-28 20:27:39,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7971 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=4150, Invalid=21610, Unknown=0, NotChecked=0, Total=25760 [2023-11-28 20:27:39,412 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 4116 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4116 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:27:39,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4116 Valid, 1332 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-28 20:27:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35386 states. [2023-11-28 20:27:40,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35386 to 8684. [2023-11-28 20:27:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8684 states, 8683 states have (on average 1.2166301969365427) internal successors, (10564), 8683 states have internal predecessors, (10564), 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) [2023-11-28 20:27:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8684 states to 8684 states and 10564 transitions. [2023-11-28 20:27:40,743 INFO L78 Accepts]: Start accepts. Automaton has 8684 states and 10564 transitions. Word has length 112 [2023-11-28 20:27:40,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:27:40,743 INFO L495 AbstractCegarLoop]: Abstraction has 8684 states and 10564 transitions. [2023-11-28 20:27:40,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.257142857142858) internal successors, (324), 34 states have internal predecessors, (324), 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) [2023-11-28 20:27:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 8684 states and 10564 transitions. [2023-11-28 20:27:40,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-28 20:27:40,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:27:40,747 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-11-28 20:27:40,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:27:40,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-28 20:27:40,947 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:27:40,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:27:40,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1283795525, now seen corresponding path program 1 times [2023-11-28 20:27:40,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:27:40,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704677709] [2023-11-28 20:27:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:40,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:27:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:42,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:42,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704677709] [2023-11-28 20:27:42,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704677709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:42,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544673030] [2023-11-28 20:27:42,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:27:42,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:42,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:42,798 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:42,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01968486-dfc5-4317-b7ed-ba09f92eec04/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:27:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:42,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-28 20:27:42,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:50,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:28:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:28:05,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544673030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:28:05,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:28:05,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 32, 31] total 85 [2023-11-28 20:28:05,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362424514] [2023-11-28 20:28:05,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:28:05,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-11-28 20:28:05,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:28:05,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-11-28 20:28:05,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=6544, Unknown=0, NotChecked=0, Total=7140 [2023-11-28 20:28:05,322 INFO L87 Difference]: Start difference. First operand 8684 states and 10564 transitions. Second operand has 85 states, 85 states have (on average 3.7529411764705882) internal successors, (319), 85 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)