./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme --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 2aece9bc24459d3bfdb5e96b44f652012670bcbf1cd47e085c4f986f518e00f1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:47:03,030 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:47:03,172 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:47:03,185 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:47:03,186 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:47:03,233 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:47:03,234 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:47:03,234 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:47:03,237 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:47:03,243 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:47:03,244 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:47:03,245 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:47:03,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:47:03,248 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:47:03,249 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:47:03,249 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:47:03,250 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:47:03,250 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:47:03,251 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:47:03,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:47:03,252 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:47:03,253 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:47:03,253 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:47:03,254 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:47:03,254 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:47:03,255 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:47:03,255 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:47:03,256 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:47:03,257 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:47:03,257 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:47:03,259 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:47:03,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:03,259 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:47:03,260 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:47:03,260 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:47:03,260 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:47:03,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:47:03,261 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:47:03,261 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:47:03,261 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:47:03,262 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:47:03,262 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:47:03,262 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_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2aece9bc24459d3bfdb5e96b44f652012670bcbf1cd47e085c4f986f518e00f1 [2023-11-26 10:47:03,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:47:03,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:47:03,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:47:03,629 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:47:03,630 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:47:03,631 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c [2023-11-26 10:47:06,767 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:47:07,381 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:47:07,382 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c [2023-11-26 10:47:07,417 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/data/86fcc8fb8/f099c605db844de7b5acbacd30a7cfef/FLAGe1dc19391 [2023-11-26 10:47:07,432 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/data/86fcc8fb8/f099c605db844de7b5acbacd30a7cfef [2023-11-26 10:47:07,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:47:07,436 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:47:07,437 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:07,437 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:47:07,442 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:47:07,443 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:07" (1/1) ... [2023-11-26 10:47:07,444 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f7c2ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:07, skipping insertion in model container [2023-11-26 10:47:07,444 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:07" (1/1) ... [2023-11-26 10:47:07,610 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:47:08,023 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_75ed4223-73f5-43eb-8735-f129a7c2e7af/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c[8712,8725] [2023-11-26 10:47:08,069 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_75ed4223-73f5-43eb-8735-f129a7c2e7af/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c[11049,11062] [2023-11-26 10:47:09,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:09,145 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:47:09,263 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_75ed4223-73f5-43eb-8735-f129a7c2e7af/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c[8712,8725] [2023-11-26 10:47:09,268 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_75ed4223-73f5-43eb-8735-f129a7c2e7af/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c[11049,11062] [2023-11-26 10:47:09,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:09,924 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:47:09,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09 WrapperNode [2023-11-26 10:47:09,925 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:09,927 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:09,927 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:47:09,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:47:09,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (1/1) ... [2023-11-26 10:47:10,006 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (1/1) ... [2023-11-26 10:47:10,478 INFO L138 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5034 [2023-11-26 10:47:10,489 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:10,489 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:47:10,490 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:47:10,490 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:47:10,516 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (1/1) ... [2023-11-26 10:47:10,516 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (1/1) ... [2023-11-26 10:47:10,566 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (1/1) ... [2023-11-26 10:47:10,758 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]. [2023-11-26 10:47:10,758 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (1/1) ... [2023-11-26 10:47:10,758 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (1/1) ... [2023-11-26 10:47:10,936 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (1/1) ... [2023-11-26 10:47:10,972 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (1/1) ... [2023-11-26 10:47:10,989 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (1/1) ... [2023-11-26 10:47:11,007 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (1/1) ... [2023-11-26 10:47:11,053 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:47:11,055 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:47:11,055 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:47:11,056 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:47:11,057 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (1/1) ... [2023-11-26 10:47:11,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:11,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:11,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:47:11,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:47:11,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:47:11,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:47:11,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:47:11,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:47:11,281 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:47:11,283 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:47:16,768 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:47:16,850 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:47:16,851 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:47:16,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:16 BoogieIcfgContainer [2023-11-26 10:47:16,852 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:47:16,855 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:47:16,855 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:47:16,858 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:47:16,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:47:07" (1/3) ... [2023-11-26 10:47:16,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634d07bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:16, skipping insertion in model container [2023-11-26 10:47:16,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:09" (2/3) ... [2023-11-26 10:47:16,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634d07bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:16, skipping insertion in model container [2023-11-26 10:47:16,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:16" (3/3) ... [2023-11-26 10:47:16,862 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c [2023-11-26 10:47:16,884 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:47:16,884 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-26 10:47:16,959 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:47:16,966 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;@5b49db80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:47:16,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-26 10:47:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 822 states, 819 states have (on average 1.9768009768009769) internal successors, (1619), 821 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:16,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 10:47:16,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:16,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:16,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:16,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:16,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1017806083, now seen corresponding path program 1 times [2023-11-26 10:47:17,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:17,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872617457] [2023-11-26 10:47:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:17,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:17,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872617457] [2023-11-26 10:47:17,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872617457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:17,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:17,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:17,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793188655] [2023-11-26 10:47:17,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:17,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:47:17,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:17,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:47:17,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:47:17,294 INFO L87 Difference]: Start difference. First operand has 822 states, 819 states have (on average 1.9768009768009769) internal successors, (1619), 821 states have internal predecessors, (1619), 0 states have call successors, (0), 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 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:17,435 INFO L93 Difference]: Finished difference Result 1616 states and 3185 transitions. [2023-11-26 10:47:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:47:17,438 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2023-11-26 10:47:17,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:17,470 INFO L225 Difference]: With dead ends: 1616 [2023-11-26 10:47:17,470 INFO L226 Difference]: Without dead ends: 818 [2023-11-26 10:47:17,477 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 [2023-11-26 10:47:17,481 INFO L413 NwaCegarLoop]: 1547 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, 1547 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 [2023-11-26 10:47:17,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1547 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2023-11-26 10:47:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 818. [2023-11-26 10:47:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 816 states have (on average 1.8970588235294117) internal successors, (1548), 817 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1548 transitions. [2023-11-26 10:47:17,575 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1548 transitions. Word has length 19 [2023-11-26 10:47:17,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:17,576 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1548 transitions. [2023-11-26 10:47:17,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:17,576 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1548 transitions. [2023-11-26 10:47:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 10:47:17,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:17,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:17,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:47:17,579 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:17,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:17,579 INFO L85 PathProgramCache]: Analyzing trace with hash -280101103, now seen corresponding path program 1 times [2023-11-26 10:47:17,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:17,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903435496] [2023-11-26 10:47:17,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:17,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:17,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:17,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903435496] [2023-11-26 10:47:17,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903435496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:17,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:17,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:17,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019077921] [2023-11-26 10:47:17,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:17,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:17,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:17,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:17,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:17,727 INFO L87 Difference]: Start difference. First operand 818 states and 1548 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:22,657 INFO L93 Difference]: Finished difference Result 2322 states and 4421 transitions. [2023-11-26 10:47:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:22,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2023-11-26 10:47:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:22,671 INFO L225 Difference]: With dead ends: 2322 [2023-11-26 10:47:22,671 INFO L226 Difference]: Without dead ends: 1569 [2023-11-26 10:47:22,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:22,675 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 959 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:22,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 221 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-26 10:47:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2023-11-26 10:47:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1569. [2023-11-26 10:47:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1567 states have (on average 1.8423739629865985) internal successors, (2887), 1568 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 2887 transitions. [2023-11-26 10:47:22,742 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 2887 transitions. Word has length 19 [2023-11-26 10:47:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:22,743 INFO L495 AbstractCegarLoop]: Abstraction has 1569 states and 2887 transitions. [2023-11-26 10:47:22,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 2887 transitions. [2023-11-26 10:47:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 10:47:22,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:22,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:22,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:47:22,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:22,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:22,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1690206650, now seen corresponding path program 1 times [2023-11-26 10:47:22,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:22,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123839669] [2023-11-26 10:47:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:22,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:23,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:23,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123839669] [2023-11-26 10:47:23,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123839669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:23,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:23,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:47:23,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503284788] [2023-11-26 10:47:23,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:23,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:23,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:23,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:23,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:23,118 INFO L87 Difference]: Start difference. First operand 1569 states and 2887 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:23,202 INFO L93 Difference]: Finished difference Result 1609 states and 2949 transitions. [2023-11-26 10:47:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2023-11-26 10:47:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:23,213 INFO L225 Difference]: With dead ends: 1609 [2023-11-26 10:47:23,214 INFO L226 Difference]: Without dead ends: 1569 [2023-11-26 10:47:23,215 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 [2023-11-26 10:47:23,216 INFO L413 NwaCegarLoop]: 1545 mSDtfsCounter, 0 mSDsluCounter, 3063 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4608 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:23,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4608 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2023-11-26 10:47:23,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1569. [2023-11-26 10:47:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1567 states have (on average 1.8276962348436503) internal successors, (2864), 1568 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 2864 transitions. [2023-11-26 10:47:23,262 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 2864 transitions. Word has length 19 [2023-11-26 10:47:23,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:23,263 INFO L495 AbstractCegarLoop]: Abstraction has 1569 states and 2864 transitions. [2023-11-26 10:47:23,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 2864 transitions. [2023-11-26 10:47:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-26 10:47:23,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:23,266 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] [2023-11-26 10:47:23,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:47:23,266 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:23,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:23,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1827910901, now seen corresponding path program 1 times [2023-11-26 10:47:23,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:23,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962810138] [2023-11-26 10:47:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:23,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:23,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:23,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962810138] [2023-11-26 10:47:23,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962810138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:23,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:23,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:47:23,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118082593] [2023-11-26 10:47:23,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:23,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:47:23,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:23,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:47:23,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:23,398 INFO L87 Difference]: Start difference. First operand 1569 states and 2864 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:23,629 INFO L93 Difference]: Finished difference Result 1865 states and 3336 transitions. [2023-11-26 10:47:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 10:47:23,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2023-11-26 10:47:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:23,643 INFO L225 Difference]: With dead ends: 1865 [2023-11-26 10:47:23,643 INFO L226 Difference]: Without dead ends: 1828 [2023-11-26 10:47:23,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:47:23,646 INFO L413 NwaCegarLoop]: 1516 mSDtfsCounter, 6269 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6269 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:23,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6269 Valid, 2107 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2023-11-26 10:47:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1604. [2023-11-26 10:47:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1602 states have (on average 1.822721598002497) internal successors, (2920), 1603 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2920 transitions. [2023-11-26 10:47:23,750 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2920 transitions. Word has length 41 [2023-11-26 10:47:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:23,750 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 2920 transitions. [2023-11-26 10:47:23,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2920 transitions. [2023-11-26 10:47:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 10:47:23,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:23,753 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] [2023-11-26 10:47:23,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:47:23,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:23,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:23,755 INFO L85 PathProgramCache]: Analyzing trace with hash -143781275, now seen corresponding path program 1 times [2023-11-26 10:47:23,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:23,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870290237] [2023-11-26 10:47:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:23,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:23,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:23,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870290237] [2023-11-26 10:47:23,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870290237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:23,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:23,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:23,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924344031] [2023-11-26 10:47:23,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:23,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:23,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:23,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:23,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:23,841 INFO L87 Difference]: Start difference. First operand 1604 states and 2920 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2023-11-26 10:47:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:23,900 INFO L93 Difference]: Finished difference Result 1737 states and 3131 transitions. [2023-11-26 10:47:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:23,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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 [2023-11-26 10:47:23,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:23,912 INFO L225 Difference]: With dead ends: 1737 [2023-11-26 10:47:23,913 INFO L226 Difference]: Without dead ends: 1665 [2023-11-26 10:47:23,914 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 [2023-11-26 10:47:23,915 INFO L413 NwaCegarLoop]: 1518 mSDtfsCounter, 1474 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:23,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1474 Valid, 1569 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:23,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2023-11-26 10:47:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1661. [2023-11-26 10:47:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1659 states have (on average 1.8131404460518386) internal successors, (3008), 1660 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 3008 transitions. [2023-11-26 10:47:23,973 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 3008 transitions. Word has length 43 [2023-11-26 10:47:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:23,974 INFO L495 AbstractCegarLoop]: Abstraction has 1661 states and 3008 transitions. [2023-11-26 10:47:23,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2023-11-26 10:47:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 3008 transitions. [2023-11-26 10:47:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 10:47:23,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:23,976 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] [2023-11-26 10:47:23,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:47:23,977 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:23,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:23,978 INFO L85 PathProgramCache]: Analyzing trace with hash -141636323, now seen corresponding path program 1 times [2023-11-26 10:47:23,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:23,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242975341] [2023-11-26 10:47:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:23,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:24,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:24,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242975341] [2023-11-26 10:47:24,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242975341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:24,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:24,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:47:24,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5956202] [2023-11-26 10:47:24,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:24,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:47:24,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:24,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:47:24,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:24,199 INFO L87 Difference]: Start difference. First operand 1661 states and 3008 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 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) [2023-11-26 10:47:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:24,355 INFO L93 Difference]: Finished difference Result 1792 states and 3212 transitions. [2023-11-26 10:47:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:47:24,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 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 [2023-11-26 10:47:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:24,367 INFO L225 Difference]: With dead ends: 1792 [2023-11-26 10:47:24,367 INFO L226 Difference]: Without dead ends: 1663 [2023-11-26 10:47:24,368 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 [2023-11-26 10:47:24,369 INFO L413 NwaCegarLoop]: 1516 mSDtfsCounter, 2970 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2970 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:24,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2970 Valid, 1681 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:24,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2023-11-26 10:47:24,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1661. [2023-11-26 10:47:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1659 states have (on average 1.8119349005424954) internal successors, (3006), 1660 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 3006 transitions. [2023-11-26 10:47:24,422 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 3006 transitions. Word has length 43 [2023-11-26 10:47:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:24,423 INFO L495 AbstractCegarLoop]: Abstraction has 1661 states and 3006 transitions. [2023-11-26 10:47:24,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 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) [2023-11-26 10:47:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 3006 transitions. [2023-11-26 10:47:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-26 10:47:24,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:24,425 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] [2023-11-26 10:47:24,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:47:24,425 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:24,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:24,426 INFO L85 PathProgramCache]: Analyzing trace with hash -224171133, now seen corresponding path program 1 times [2023-11-26 10:47:24,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:24,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103935709] [2023-11-26 10:47:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:24,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:24,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:24,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103935709] [2023-11-26 10:47:24,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103935709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:24,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:24,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:47:24,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409507233] [2023-11-26 10:47:24,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:24,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:24,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:24,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:24,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:24,681 INFO L87 Difference]: Start difference. First operand 1661 states and 3006 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) [2023-11-26 10:47:24,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:24,741 INFO L93 Difference]: Finished difference Result 1669 states and 3015 transitions. [2023-11-26 10:47:24,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:24,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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 [2023-11-26 10:47:24,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:24,753 INFO L225 Difference]: With dead ends: 1669 [2023-11-26 10:47:24,753 INFO L226 Difference]: Without dead ends: 1667 [2023-11-26 10:47:24,756 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 [2023-11-26 10:47:24,757 INFO L413 NwaCegarLoop]: 1521 mSDtfsCounter, 1 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4555 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 [2023-11-26 10:47:24,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4555 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:24,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2023-11-26 10:47:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1665. [2023-11-26 10:47:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1663 states have (on average 1.809380637402285) internal successors, (3009), 1664 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 3009 transitions. [2023-11-26 10:47:24,816 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 3009 transitions. Word has length 44 [2023-11-26 10:47:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:24,818 INFO L495 AbstractCegarLoop]: Abstraction has 1665 states and 3009 transitions. [2023-11-26 10:47:24,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) [2023-11-26 10:47:24,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 3009 transitions. [2023-11-26 10:47:24,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-26 10:47:24,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:24,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:24,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:47:24,821 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:24,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:24,822 INFO L85 PathProgramCache]: Analyzing trace with hash 339171325, now seen corresponding path program 1 times [2023-11-26 10:47:24,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:24,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672736405] [2023-11-26 10:47:24,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:24,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:24,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:24,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672736405] [2023-11-26 10:47:24,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672736405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:24,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:24,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:24,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588582497] [2023-11-26 10:47:24,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:24,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:24,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:24,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:24,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:24,918 INFO L87 Difference]: Start difference. First operand 1665 states and 3009 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:24,969 INFO L93 Difference]: Finished difference Result 1915 states and 3389 transitions. [2023-11-26 10:47:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:24,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2023-11-26 10:47:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:24,982 INFO L225 Difference]: With dead ends: 1915 [2023-11-26 10:47:24,983 INFO L226 Difference]: Without dead ends: 1782 [2023-11-26 10:47:24,984 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 [2023-11-26 10:47:24,985 INFO L413 NwaCegarLoop]: 1557 mSDtfsCounter, 1485 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:24,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 1620 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2023-11-26 10:47:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1780. [2023-11-26 10:47:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1778 states have (on average 1.7885264341957254) internal successors, (3180), 1779 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3180 transitions. [2023-11-26 10:47:25,047 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3180 transitions. Word has length 45 [2023-11-26 10:47:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:25,048 INFO L495 AbstractCegarLoop]: Abstraction has 1780 states and 3180 transitions. [2023-11-26 10:47:25,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3180 transitions. [2023-11-26 10:47:25,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-26 10:47:25,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:25,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:25,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:47:25,050 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:25,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:25,051 INFO L85 PathProgramCache]: Analyzing trace with hash -286484739, now seen corresponding path program 1 times [2023-11-26 10:47:25,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:25,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014789182] [2023-11-26 10:47:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:25,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:25,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:25,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014789182] [2023-11-26 10:47:25,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014789182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:25,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:25,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:25,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690688131] [2023-11-26 10:47:25,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:25,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:25,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:25,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:25,123 INFO L87 Difference]: Start difference. First operand 1780 states and 3180 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:25,182 INFO L93 Difference]: Finished difference Result 2244 states and 3874 transitions. [2023-11-26 10:47:25,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:25,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2023-11-26 10:47:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:25,197 INFO L225 Difference]: With dead ends: 2244 [2023-11-26 10:47:25,198 INFO L226 Difference]: Without dead ends: 1996 [2023-11-26 10:47:25,201 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 [2023-11-26 10:47:25,201 INFO L413 NwaCegarLoop]: 1555 mSDtfsCounter, 1483 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:25,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1483 Valid, 1622 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:25,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2023-11-26 10:47:25,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1994. [2023-11-26 10:47:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1992 states have (on average 1.752008032128514) internal successors, (3490), 1993 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 3490 transitions. [2023-11-26 10:47:25,273 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 3490 transitions. Word has length 45 [2023-11-26 10:47:25,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:25,273 INFO L495 AbstractCegarLoop]: Abstraction has 1994 states and 3490 transitions. [2023-11-26 10:47:25,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 3490 transitions. [2023-11-26 10:47:25,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-26 10:47:25,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:25,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:25,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:47:25,275 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:25,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash 602248701, now seen corresponding path program 1 times [2023-11-26 10:47:25,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:25,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922153659] [2023-11-26 10:47:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:25,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:25,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:25,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922153659] [2023-11-26 10:47:25,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922153659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:25,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:25,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:25,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434927811] [2023-11-26 10:47:25,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:25,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:25,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:25,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:25,360 INFO L87 Difference]: Start difference. First operand 1994 states and 3490 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:25,424 INFO L93 Difference]: Finished difference Result 2854 states and 4748 transitions. [2023-11-26 10:47:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2023-11-26 10:47:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:25,438 INFO L225 Difference]: With dead ends: 2854 [2023-11-26 10:47:25,438 INFO L226 Difference]: Without dead ends: 2392 [2023-11-26 10:47:25,440 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 [2023-11-26 10:47:25,441 INFO L413 NwaCegarLoop]: 1553 mSDtfsCounter, 1481 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:25,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1481 Valid, 1624 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:25,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2023-11-26 10:47:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2390. [2023-11-26 10:47:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2388 states have (on average 1.6943048576214406) internal successors, (4046), 2389 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 4046 transitions. [2023-11-26 10:47:25,535 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 4046 transitions. Word has length 45 [2023-11-26 10:47:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:25,535 INFO L495 AbstractCegarLoop]: Abstraction has 2390 states and 4046 transitions. [2023-11-26 10:47:25,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 4046 transitions. [2023-11-26 10:47:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-26 10:47:25,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:25,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:25,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:47:25,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:25,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:25,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1358107618, now seen corresponding path program 1 times [2023-11-26 10:47:25,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:25,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559469024] [2023-11-26 10:47:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:25,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:25,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:25,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559469024] [2023-11-26 10:47:25,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559469024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:25,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:25,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:25,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605448573] [2023-11-26 10:47:25,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:25,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:25,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:25,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:25,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:25,590 INFO L87 Difference]: Start difference. First operand 2390 states and 4046 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:25,714 INFO L93 Difference]: Finished difference Result 3293 states and 5380 transitions. [2023-11-26 10:47:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:25,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2023-11-26 10:47:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:25,731 INFO L225 Difference]: With dead ends: 3293 [2023-11-26 10:47:25,731 INFO L226 Difference]: Without dead ends: 2794 [2023-11-26 10:47:25,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:25,733 INFO L413 NwaCegarLoop]: 1562 mSDtfsCounter, 1484 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:25,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1484 Valid, 1621 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2023-11-26 10:47:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 2792. [2023-11-26 10:47:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2790 states have (on average 1.6544802867383512) internal successors, (4616), 2791 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 4616 transitions. [2023-11-26 10:47:25,836 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 4616 transitions. Word has length 47 [2023-11-26 10:47:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:25,836 INFO L495 AbstractCegarLoop]: Abstraction has 2792 states and 4616 transitions. [2023-11-26 10:47:25,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 4616 transitions. [2023-11-26 10:47:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-26 10:47:25,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:25,838 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] [2023-11-26 10:47:25,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:47:25,838 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:25,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:25,839 INFO L85 PathProgramCache]: Analyzing trace with hash 445025325, now seen corresponding path program 1 times [2023-11-26 10:47:25,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:25,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433804027] [2023-11-26 10:47:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:25,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:47:26,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:26,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433804027] [2023-11-26 10:47:26,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433804027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:26,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:26,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:47:26,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465280742] [2023-11-26 10:47:26,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:26,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:47:26,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:47:26,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:26,010 INFO L87 Difference]: Start difference. First operand 2792 states and 4616 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:26,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:26,302 INFO L93 Difference]: Finished difference Result 8098 states and 12229 transitions. [2023-11-26 10:47:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:47:26,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2023-11-26 10:47:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:26,334 INFO L225 Difference]: With dead ends: 8098 [2023-11-26 10:47:26,334 INFO L226 Difference]: Without dead ends: 6840 [2023-11-26 10:47:26,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:47:26,339 INFO L413 NwaCegarLoop]: 1574 mSDtfsCounter, 4657 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4657 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:26,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4657 Valid, 3329 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6840 states. [2023-11-26 10:47:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6840 to 4048. [2023-11-26 10:47:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4048 states, 4046 states have (on average 1.5818091942659416) internal successors, (6400), 4047 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4048 states to 4048 states and 6400 transitions. [2023-11-26 10:47:26,541 INFO L78 Accepts]: Start accepts. Automaton has 4048 states and 6400 transitions. Word has length 61 [2023-11-26 10:47:26,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:26,542 INFO L495 AbstractCegarLoop]: Abstraction has 4048 states and 6400 transitions. [2023-11-26 10:47:26,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:26,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4048 states and 6400 transitions. [2023-11-26 10:47:26,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-26 10:47:26,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:26,544 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] [2023-11-26 10:47:26,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:47:26,545 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:26,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:26,545 INFO L85 PathProgramCache]: Analyzing trace with hash -180630739, now seen corresponding path program 1 times [2023-11-26 10:47:26,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:26,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347569237] [2023-11-26 10:47:26,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:26,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:47:26,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:26,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347569237] [2023-11-26 10:47:26,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347569237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:26,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:26,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:47:26,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884075488] [2023-11-26 10:47:26,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:26,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:47:26,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:26,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:47:26,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:26,680 INFO L87 Difference]: Start difference. First operand 4048 states and 6400 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:27,054 INFO L93 Difference]: Finished difference Result 9354 states and 14013 transitions. [2023-11-26 10:47:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:47:27,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-26 10:47:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:27,076 INFO L225 Difference]: With dead ends: 9354 [2023-11-26 10:47:27,077 INFO L226 Difference]: Without dead ends: 8096 [2023-11-26 10:47:27,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:47:27,082 INFO L413 NwaCegarLoop]: 1571 mSDtfsCounter, 4677 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4677 SdHoareTripleChecker+Valid, 3299 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:27,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4677 Valid, 3299 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:27,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2023-11-26 10:47:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 5936. [2023-11-26 10:47:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5936 states, 5934 states have (on average 1.5261206605999327) internal successors, (9056), 5935 states have internal predecessors, (9056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5936 states to 5936 states and 9056 transitions. [2023-11-26 10:47:27,469 INFO L78 Accepts]: Start accepts. Automaton has 5936 states and 9056 transitions. Word has length 61 [2023-11-26 10:47:27,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:27,470 INFO L495 AbstractCegarLoop]: Abstraction has 5936 states and 9056 transitions. [2023-11-26 10:47:27,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:27,471 INFO L276 IsEmpty]: Start isEmpty. Operand 5936 states and 9056 transitions. [2023-11-26 10:47:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-26 10:47:27,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:27,473 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] [2023-11-26 10:47:27,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 10:47:27,473 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:27,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:27,474 INFO L85 PathProgramCache]: Analyzing trace with hash 708102701, now seen corresponding path program 1 times [2023-11-26 10:47:27,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:27,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021155565] [2023-11-26 10:47:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:27,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:47:27,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021155565] [2023-11-26 10:47:27,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021155565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:27,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:27,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:47:27,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403832762] [2023-11-26 10:47:27,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:27,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:47:27,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:27,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:47:27,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:27,624 INFO L87 Difference]: Start difference. First operand 5936 states and 9056 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:28,044 INFO L93 Difference]: Finished difference Result 10610 states and 15797 transitions. [2023-11-26 10:47:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:47:28,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 [2023-11-26 10:47:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:28,067 INFO L225 Difference]: With dead ends: 10610 [2023-11-26 10:47:28,067 INFO L226 Difference]: Without dead ends: 9352 [2023-11-26 10:47:28,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:47:28,073 INFO L413 NwaCegarLoop]: 1573 mSDtfsCounter, 4663 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4663 SdHoareTripleChecker+Valid, 3316 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:28,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4663 Valid, 3316 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:28,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9352 states. [2023-11-26 10:47:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9352 to 7192. [2023-11-26 10:47:28,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7192 states, 7190 states have (on average 1.5076495132127956) internal successors, (10840), 7191 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7192 states to 7192 states and 10840 transitions. [2023-11-26 10:47:28,401 INFO L78 Accepts]: Start accepts. Automaton has 7192 states and 10840 transitions. Word has length 61 [2023-11-26 10:47:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:28,402 INFO L495 AbstractCegarLoop]: Abstraction has 7192 states and 10840 transitions. [2023-11-26 10:47:28,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 7192 states and 10840 transitions. [2023-11-26 10:47:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 10:47:28,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:28,404 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, 1] [2023-11-26 10:47:28,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:47:28,405 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:28,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:28,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1949780395, now seen corresponding path program 1 times [2023-11-26 10:47:28,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:28,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425737858] [2023-11-26 10:47:28,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:28,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:28,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:28,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425737858] [2023-11-26 10:47:28,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425737858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:28,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:28,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:28,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949488631] [2023-11-26 10:47:28,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:28,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:28,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:28,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:28,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:28,626 INFO L87 Difference]: Start difference. First operand 7192 states and 10840 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) [2023-11-26 10:47:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:28,838 INFO L93 Difference]: Finished difference Result 11245 states and 16692 transitions. [2023-11-26 10:47:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:28,838 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 [2023-11-26 10:47:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:28,851 INFO L225 Difference]: With dead ends: 11245 [2023-11-26 10:47:28,851 INFO L226 Difference]: Without dead ends: 5587 [2023-11-26 10:47:28,860 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 [2023-11-26 10:47:28,861 INFO L413 NwaCegarLoop]: 1554 mSDtfsCounter, 42 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3062 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:28,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3062 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5587 states. [2023-11-26 10:47:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5587 to 5585. [2023-11-26 10:47:29,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5585 states, 5583 states have (on average 1.537703743507075) internal successors, (8585), 5584 states have internal predecessors, (8585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5585 states to 5585 states and 8585 transitions. [2023-11-26 10:47:29,145 INFO L78 Accepts]: Start accepts. Automaton has 5585 states and 8585 transitions. Word has length 63 [2023-11-26 10:47:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:29,146 INFO L495 AbstractCegarLoop]: Abstraction has 5585 states and 8585 transitions. [2023-11-26 10:47:29,146 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) [2023-11-26 10:47:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 5585 states and 8585 transitions. [2023-11-26 10:47:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 10:47:29,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:29,153 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] [2023-11-26 10:47:29,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 10:47:29,154 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:29,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:29,155 INFO L85 PathProgramCache]: Analyzing trace with hash 4586514, now seen corresponding path program 1 times [2023-11-26 10:47:29,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:29,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764362375] [2023-11-26 10:47:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:29,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:29,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:29,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764362375] [2023-11-26 10:47:29,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764362375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:29,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:29,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:47:29,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83998316] [2023-11-26 10:47:29,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:29,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:47:29,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:47:29,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:47:29,326 INFO L87 Difference]: Start difference. First operand 5585 states and 8585 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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) [2023-11-26 10:47:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:29,692 INFO L93 Difference]: Finished difference Result 9179 states and 13774 transitions. [2023-11-26 10:47:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:47:29,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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 63 [2023-11-26 10:47:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:29,710 INFO L225 Difference]: With dead ends: 9179 [2023-11-26 10:47:29,711 INFO L226 Difference]: Without dead ends: 8281 [2023-11-26 10:47:29,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:47:29,716 INFO L413 NwaCegarLoop]: 1569 mSDtfsCounter, 4657 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4657 SdHoareTripleChecker+Valid, 3368 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:29,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4657 Valid, 3368 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:47:29,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8281 states. [2023-11-26 10:47:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8281 to 6481. [2023-11-26 10:47:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6481 states, 6479 states have (on average 1.5226115141225498) internal successors, (9865), 6480 states have internal predecessors, (9865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6481 states to 6481 states and 9865 transitions. [2023-11-26 10:47:30,032 INFO L78 Accepts]: Start accepts. Automaton has 6481 states and 9865 transitions. Word has length 63 [2023-11-26 10:47:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:30,033 INFO L495 AbstractCegarLoop]: Abstraction has 6481 states and 9865 transitions. [2023-11-26 10:47:30,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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) [2023-11-26 10:47:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 6481 states and 9865 transitions. [2023-11-26 10:47:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-26 10:47:30,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:30,035 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, 1, 1, 1] [2023-11-26 10:47:30,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 10:47:30,035 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:30,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:30,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1055056157, now seen corresponding path program 1 times [2023-11-26 10:47:30,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:30,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656877064] [2023-11-26 10:47:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:30,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:30,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:30,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656877064] [2023-11-26 10:47:30,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656877064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:30,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:30,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:30,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973233002] [2023-11-26 10:47:30,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:30,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:30,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:30,163 INFO L87 Difference]: Start difference. First operand 6481 states and 9865 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:30,281 INFO L93 Difference]: Finished difference Result 8949 states and 13387 transitions. [2023-11-26 10:47:30,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:30,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2023-11-26 10:47:30,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:30,290 INFO L225 Difference]: With dead ends: 8949 [2023-11-26 10:47:30,291 INFO L226 Difference]: Without dead ends: 4019 [2023-11-26 10:47:30,296 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 [2023-11-26 10:47:30,297 INFO L413 NwaCegarLoop]: 1547 mSDtfsCounter, 37 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3047 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:30,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3047 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2023-11-26 10:47:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 4017. [2023-11-26 10:47:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 4015 states have (on average 1.5693648816936487) internal successors, (6301), 4016 states have internal predecessors, (6301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 6301 transitions. [2023-11-26 10:47:30,516 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 6301 transitions. Word has length 64 [2023-11-26 10:47:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:30,517 INFO L495 AbstractCegarLoop]: Abstraction has 4017 states and 6301 transitions. [2023-11-26 10:47:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 6301 transitions. [2023-11-26 10:47:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-26 10:47:30,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:30,519 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, 1, 1, 1] [2023-11-26 10:47:30,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 10:47:30,519 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:30,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:30,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1300219787, now seen corresponding path program 1 times [2023-11-26 10:47:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:30,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349576034] [2023-11-26 10:47:30,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:30,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:30,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:30,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349576034] [2023-11-26 10:47:30,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349576034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:30,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:30,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:30,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044062965] [2023-11-26 10:47:30,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:30,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:30,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:30,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:30,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:30,637 INFO L87 Difference]: Start difference. First operand 4017 states and 6301 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:30,713 INFO L93 Difference]: Finished difference Result 5253 states and 8041 transitions. [2023-11-26 10:47:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:30,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2023-11-26 10:47:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:30,720 INFO L225 Difference]: With dead ends: 5253 [2023-11-26 10:47:30,720 INFO L226 Difference]: Without dead ends: 2787 [2023-11-26 10:47:30,724 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 [2023-11-26 10:47:30,724 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 34 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:30,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3032 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2023-11-26 10:47:30,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2785. [2023-11-26 10:47:30,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2783 states have (on average 1.6316924182536832) internal successors, (4541), 2784 states have internal predecessors, (4541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 4541 transitions. [2023-11-26 10:47:30,819 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 4541 transitions. Word has length 66 [2023-11-26 10:47:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:30,819 INFO L495 AbstractCegarLoop]: Abstraction has 2785 states and 4541 transitions. [2023-11-26 10:47:30,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:30,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 4541 transitions. [2023-11-26 10:47:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-26 10:47:30,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:30,821 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] [2023-11-26 10:47:30,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 10:47:30,822 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:30,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash 925871993, now seen corresponding path program 1 times [2023-11-26 10:47:30,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:30,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818021672] [2023-11-26 10:47:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:30,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:30,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:30,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818021672] [2023-11-26 10:47:30,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818021672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:30,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:30,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:30,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698805354] [2023-11-26 10:47:30,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:30,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:30,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:30,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:30,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:30,944 INFO L87 Difference]: Start difference. First operand 2785 states and 4541 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:30,996 INFO L93 Difference]: Finished difference Result 3405 states and 5401 transitions. [2023-11-26 10:47:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:30,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-26 10:47:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:31,002 INFO L225 Difference]: With dead ends: 3405 [2023-11-26 10:47:31,002 INFO L226 Difference]: Without dead ends: 2171 [2023-11-26 10:47:31,004 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 [2023-11-26 10:47:31,005 INFO L413 NwaCegarLoop]: 1533 mSDtfsCounter, 31 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3017 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:31,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3017 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2023-11-26 10:47:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2023-11-26 10:47:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2167 states have (on average 1.694508537148131) internal successors, (3672), 2168 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3672 transitions. [2023-11-26 10:47:31,071 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3672 transitions. Word has length 68 [2023-11-26 10:47:31,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:31,072 INFO L495 AbstractCegarLoop]: Abstraction has 2169 states and 3672 transitions. [2023-11-26 10:47:31,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3672 transitions. [2023-11-26 10:47:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-26 10:47:31,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:31,073 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, 1, 1, 1] [2023-11-26 10:47:31,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 10:47:31,074 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:31,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:31,074 INFO L85 PathProgramCache]: Analyzing trace with hash -324175641, now seen corresponding path program 1 times [2023-11-26 10:47:31,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:31,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588974578] [2023-11-26 10:47:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:31,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:33,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:33,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588974578] [2023-11-26 10:47:33,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588974578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:33,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702227993] [2023-11-26 10:47:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:33,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:33,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:33,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:33,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:47:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:33,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:47:33,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:33,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 10:47:34,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702227993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:34,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:34,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 4] total 18 [2023-11-26 10:47:34,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446374735] [2023-11-26 10:47:34,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:34,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:47:34,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:34,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:47:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:47:34,005 INFO L87 Difference]: Start difference. First operand 2169 states and 3672 transitions. Second operand has 18 states, 18 states have (on average 10.88888888888889) internal successors, (196), 18 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:37,649 INFO L93 Difference]: Finished difference Result 6492 states and 9419 transitions. [2023-11-26 10:47:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-26 10:47:37,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.88888888888889) internal successors, (196), 18 states have internal predecessors, (196), 0 states have call successors, (0), 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 [2023-11-26 10:47:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:37,661 INFO L225 Difference]: With dead ends: 6492 [2023-11-26 10:47:37,662 INFO L226 Difference]: Without dead ends: 5874 [2023-11-26 10:47:37,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=689, Invalid=2971, Unknown=0, NotChecked=0, Total=3660 [2023-11-26 10:47:37,667 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 17626 mSDsluCounter, 6295 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17626 SdHoareTripleChecker+Valid, 7801 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:37,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17626 Valid, 7801 Invalid, 774 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [52 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:47:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5874 states. [2023-11-26 10:47:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5874 to 5630. [2023-11-26 10:47:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5630 states, 5628 states have (on average 1.4305259417199716) internal successors, (8051), 5629 states have internal predecessors, (8051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5630 states to 5630 states and 8051 transitions. [2023-11-26 10:47:37,913 INFO L78 Accepts]: Start accepts. Automaton has 5630 states and 8051 transitions. Word has length 70 [2023-11-26 10:47:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:37,914 INFO L495 AbstractCegarLoop]: Abstraction has 5630 states and 8051 transitions. [2023-11-26 10:47:37,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.88888888888889) internal successors, (196), 18 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 5630 states and 8051 transitions. [2023-11-26 10:47:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-26 10:47:37,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:37,916 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, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:37,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:38,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:38,123 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:38,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2128128912, now seen corresponding path program 1 times [2023-11-26 10:47:38,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:38,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54132967] [2023-11-26 10:47:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:38,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:41,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:41,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54132967] [2023-11-26 10:47:41,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54132967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:41,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892693648] [2023-11-26 10:47:41,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:41,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:41,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:41,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:41,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:47:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:41,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 10:47:41,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:42,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:43,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892693648] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:43,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:43,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 27 [2023-11-26 10:47:43,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490915627] [2023-11-26 10:47:43,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:43,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 10:47:43,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:43,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 10:47:43,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2023-11-26 10:47:43,320 INFO L87 Difference]: Start difference. First operand 5630 states and 8051 transitions. Second operand has 28 states, 28 states have (on average 6.5) internal successors, (182), 27 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:46,189 INFO L93 Difference]: Finished difference Result 23284 states and 30570 transitions. [2023-11-26 10:47:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-26 10:47:46,189 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.5) internal successors, (182), 27 states have internal predecessors, (182), 0 states have call successors, (0), 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 [2023-11-26 10:47:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:46,234 INFO L225 Difference]: With dead ends: 23284 [2023-11-26 10:47:46,234 INFO L226 Difference]: Without dead ends: 19698 [2023-11-26 10:47:46,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=565, Invalid=2515, Unknown=0, NotChecked=0, Total=3080 [2023-11-26 10:47:46,247 INFO L413 NwaCegarLoop]: 1497 mSDtfsCounter, 26373 mSDsluCounter, 7953 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26373 SdHoareTripleChecker+Valid, 9450 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:46,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26373 Valid, 9450 Invalid, 816 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [47 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:47:46,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19698 states. [2023-11-26 10:47:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19698 to 17580. [2023-11-26 10:47:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17580 states, 17578 states have (on average 1.3247809762202754) internal successors, (23287), 17579 states have internal predecessors, (23287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17580 states to 17580 states and 23287 transitions. [2023-11-26 10:47:47,203 INFO L78 Accepts]: Start accepts. Automaton has 17580 states and 23287 transitions. Word has length 71 [2023-11-26 10:47:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:47,203 INFO L495 AbstractCegarLoop]: Abstraction has 17580 states and 23287 transitions. [2023-11-26 10:47:47,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.5) internal successors, (182), 27 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:47:47,204 INFO L276 IsEmpty]: Start isEmpty. Operand 17580 states and 23287 transitions. [2023-11-26 10:47:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-26 10:47:47,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:47,206 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] [2023-11-26 10:47:47,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75ed4223-73f5-43eb-8735-f129a7c2e7af/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0