./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ --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 64bit --witnessprinter.graph.data.programhash 61ff0c478cd6e8d41d810ae4d1198eff2eb63a9a5783db9909f1ae30395ad01a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:40:07,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:40:07,216 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-23 22:40:07,223 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:40:07,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:40:07,262 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:40:07,263 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:40:07,264 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:40:07,266 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:40:07,270 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:40:07,271 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:40:07,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:40:07,273 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:40:07,275 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:40:07,275 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:40:07,276 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:40:07,276 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:40:07,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:40:07,277 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:40:07,277 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:40:07,278 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:40:07,278 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:40:07,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:40:07,279 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:40:07,280 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:40:07,280 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:40:07,299 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:40:07,300 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:40:07,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:40:07,301 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:40:07,301 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:40:07,302 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:40:07,302 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:40:07,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:40:07,303 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:40:07,303 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:40:07,303 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:40:07,303 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:40:07,304 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:40:07,304 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_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61ff0c478cd6e8d41d810ae4d1198eff2eb63a9a5783db9909f1ae30395ad01a [2023-11-23 22:40:07,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:40:07,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:40:07,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:40:07,694 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:40:07,694 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:40:07,704 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-back-serstep.c [2023-11-23 22:40:10,776 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:40:11,039 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:40:11,040 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-back-serstep.c [2023-11-23 22:40:11,055 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/data/484506017/1f587dd9f2dd476697b3e1255782c488/FLAG9f30fbe05 [2023-11-23 22:40:11,075 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/data/484506017/1f587dd9f2dd476697b3e1255782c488 [2023-11-23 22:40:11,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:40:11,079 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:40:11,081 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:40:11,081 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:40:11,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:40:11,092 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:11,093 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8e72ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11, skipping insertion in model container [2023-11-23 22:40:11,093 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:11,164 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:40:11,333 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_3d642d8b-af7d-451d-97a9-c604b35ef97d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-back-serstep.c[1174,1187] [2023-11-23 22:40:11,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:40:11,569 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:40:11,585 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_3d642d8b-af7d-451d-97a9-c604b35ef97d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.6.prop1-back-serstep.c[1174,1187] [2023-11-23 22:40:11,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:40:11,746 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:40:11,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11 WrapperNode [2023-11-23 22:40:11,747 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:40:11,748 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:40:11,748 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:40:11,749 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:40:11,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:11,809 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:12,094 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2193 [2023-11-23 22:40:12,095 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:40:12,095 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:40:12,096 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:40:12,097 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:40:12,110 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:12,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:12,271 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:12,354 INFO L189 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-23 22:40:12,361 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:12,361 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:12,452 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:12,484 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:12,541 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:12,565 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:12,601 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:40:12,603 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:40:12,603 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:40:12,603 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:40:12,604 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (1/1) ... [2023-11-23 22:40:12,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:40:12,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:12,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:40:12,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:40:12,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:40:12,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:40:12,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:40:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:40:12,971 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:40:12,973 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:40:15,370 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:40:15,427 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:40:15,428 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:40:15,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:40:15 BoogieIcfgContainer [2023-11-23 22:40:15,429 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:40:15,431 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:40:15,432 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:40:15,435 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:40:15,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:40:11" (1/3) ... [2023-11-23 22:40:15,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277a6c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:40:15, skipping insertion in model container [2023-11-23 22:40:15,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:11" (2/3) ... [2023-11-23 22:40:15,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277a6c76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:40:15, skipping insertion in model container [2023-11-23 22:40:15,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:40:15" (3/3) ... [2023-11-23 22:40:15,438 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.adding.6.prop1-back-serstep.c [2023-11-23 22:40:15,458 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:40:15,458 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:40:15,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:40:15,528 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;@71b438d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:40:15,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:40:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 514 states, 512 states have (on average 1.671875) internal successors, (856), 513 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-23 22:40:15,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:15,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:15,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:15,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:15,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1269485081, now seen corresponding path program 1 times [2023-11-23 22:40:15,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:15,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735411700] [2023-11-23 22:40:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:15,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:16,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:16,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735411700] [2023-11-23 22:40:16,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735411700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:16,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:16,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:16,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596864835] [2023-11-23 22:40:16,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:16,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:40:16,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:40:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:40:16,800 INFO L87 Difference]: Start difference. First operand has 514 states, 512 states have (on average 1.671875) internal successors, (856), 513 states have internal predecessors, (856), 0 states have call successors, (0), 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 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:17,796 INFO L93 Difference]: Finished difference Result 1470 states and 2454 transitions. [2023-11-23 22:40:17,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:17,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-11-23 22:40:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:17,829 INFO L225 Difference]: With dead ends: 1470 [2023-11-23 22:40:17,829 INFO L226 Difference]: Without dead ends: 990 [2023-11-23 22:40:17,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:40:17,845 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 2389 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2389 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:17,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2389 Valid, 1949 Invalid, 607 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 22:40:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2023-11-23 22:40:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 560. [2023-11-23 22:40:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 1.663685152057245) internal successors, (930), 559 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 930 transitions. [2023-11-23 22:40:17,946 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 930 transitions. Word has length 84 [2023-11-23 22:40:17,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:17,947 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 930 transitions. [2023-11-23 22:40:17,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 930 transitions. [2023-11-23 22:40:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-23 22:40:17,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:17,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:17,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:40:17,952 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:17,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:17,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1387787353, now seen corresponding path program 1 times [2023-11-23 22:40:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:17,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674554343] [2023-11-23 22:40:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:17,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:18,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:18,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674554343] [2023-11-23 22:40:18,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674554343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:18,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:18,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:40:18,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536721892] [2023-11-23 22:40:18,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:18,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:40:18,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:18,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:40:18,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:40:18,390 INFO L87 Difference]: Start difference. First operand 560 states and 930 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:19,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:19,027 INFO L93 Difference]: Finished difference Result 1492 states and 2477 transitions. [2023-11-23 22:40:19,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:40:19,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2023-11-23 22:40:19,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:19,034 INFO L225 Difference]: With dead ends: 1492 [2023-11-23 22:40:19,034 INFO L226 Difference]: Without dead ends: 1014 [2023-11-23 22:40:19,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:40:19,037 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 3142 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3142 SdHoareTripleChecker+Valid, 2257 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:19,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3142 Valid, 2257 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:40:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2023-11-23 22:40:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 565. [2023-11-23 22:40:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.6613475177304964) internal successors, (937), 564 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 937 transitions. [2023-11-23 22:40:19,063 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 937 transitions. Word has length 85 [2023-11-23 22:40:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:19,063 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 937 transitions. [2023-11-23 22:40:19,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 937 transitions. [2023-11-23 22:40:19,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-23 22:40:19,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:19,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:19,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:40:19,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:19,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1912023503, now seen corresponding path program 1 times [2023-11-23 22:40:19,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:19,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150757748] [2023-11-23 22:40:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:19,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:19,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:19,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150757748] [2023-11-23 22:40:19,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150757748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:19,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:19,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:19,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214436254] [2023-11-23 22:40:19,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:19,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:40:19,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:19,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:40:19,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:40:19,632 INFO L87 Difference]: Start difference. First operand 565 states and 937 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:20,396 INFO L93 Difference]: Finished difference Result 1468 states and 2441 transitions. [2023-11-23 22:40:20,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:20,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-11-23 22:40:20,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:20,403 INFO L225 Difference]: With dead ends: 1468 [2023-11-23 22:40:20,404 INFO L226 Difference]: Without dead ends: 990 [2023-11-23 22:40:20,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:40:20,406 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 2379 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2379 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:20,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2379 Valid, 1949 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:40:20,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2023-11-23 22:40:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 566. [2023-11-23 22:40:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.6601769911504425) internal successors, (938), 565 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 938 transitions. [2023-11-23 22:40:20,428 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 938 transitions. Word has length 86 [2023-11-23 22:40:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:20,428 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 938 transitions. [2023-11-23 22:40:20,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 938 transitions. [2023-11-23 22:40:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-23 22:40:20,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:20,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:20,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:40:20,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:20,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1974063117, now seen corresponding path program 1 times [2023-11-23 22:40:20,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:20,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668474650] [2023-11-23 22:40:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:20,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:20,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:20,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668474650] [2023-11-23 22:40:20,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668474650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:20,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:20,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:40:20,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831062746] [2023-11-23 22:40:20,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:20,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:40:20,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:20,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:40:20,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:40:20,760 INFO L87 Difference]: Start difference. First operand 566 states and 938 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:21,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:21,579 INFO L93 Difference]: Finished difference Result 1492 states and 2475 transitions. [2023-11-23 22:40:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:40:21,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-11-23 22:40:21,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:21,586 INFO L225 Difference]: With dead ends: 1492 [2023-11-23 22:40:21,587 INFO L226 Difference]: Without dead ends: 1014 [2023-11-23 22:40:21,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:40:21,589 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 2383 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 2881 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:21,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2383 Valid, 2881 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:40:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2023-11-23 22:40:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 574. [2023-11-23 22:40:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 1.6579406631762652) internal successors, (950), 573 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 950 transitions. [2023-11-23 22:40:21,611 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 950 transitions. Word has length 86 [2023-11-23 22:40:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:21,611 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 950 transitions. [2023-11-23 22:40:21,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 950 transitions. [2023-11-23 22:40:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-23 22:40:21,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:21,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:21,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:40:21,614 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:21,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash 295592119, now seen corresponding path program 1 times [2023-11-23 22:40:21,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:21,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140395566] [2023-11-23 22:40:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:22,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:22,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140395566] [2023-11-23 22:40:22,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140395566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:22,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:22,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:22,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169558735] [2023-11-23 22:40:22,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:22,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:40:22,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:22,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:40:22,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:40:22,091 INFO L87 Difference]: Start difference. First operand 574 states and 950 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:22,862 INFO L93 Difference]: Finished difference Result 1468 states and 2439 transitions. [2023-11-23 22:40:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:22,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2023-11-23 22:40:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:22,869 INFO L225 Difference]: With dead ends: 1468 [2023-11-23 22:40:22,869 INFO L226 Difference]: Without dead ends: 990 [2023-11-23 22:40:22,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:40:22,874 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 2368 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2368 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:22,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2368 Valid, 1949 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:40:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2023-11-23 22:40:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 575. [2023-11-23 22:40:22,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.656794425087108) internal successors, (951), 574 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 951 transitions. [2023-11-23 22:40:22,901 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 951 transitions. Word has length 87 [2023-11-23 22:40:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:22,903 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 951 transitions. [2023-11-23 22:40:22,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 951 transitions. [2023-11-23 22:40:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-23 22:40:22,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:22,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:22,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:40:22,906 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:22,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash -522056331, now seen corresponding path program 1 times [2023-11-23 22:40:22,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:22,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243202329] [2023-11-23 22:40:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:22,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:23,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:23,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243202329] [2023-11-23 22:40:23,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243202329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:23,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:23,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:40:23,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167244310] [2023-11-23 22:40:23,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:23,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:40:23,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:23,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:40:23,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:40:23,225 INFO L87 Difference]: Start difference. First operand 575 states and 951 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:24,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:24,038 INFO L93 Difference]: Finished difference Result 1492 states and 2473 transitions. [2023-11-23 22:40:24,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:40:24,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2023-11-23 22:40:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:24,044 INFO L225 Difference]: With dead ends: 1492 [2023-11-23 22:40:24,045 INFO L226 Difference]: Without dead ends: 1014 [2023-11-23 22:40:24,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:40:24,047 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 2374 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2374 SdHoareTripleChecker+Valid, 2883 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:24,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2374 Valid, 2883 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:40:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2023-11-23 22:40:24,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 580. [2023-11-23 22:40:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 1.6545768566493955) internal successors, (958), 579 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 958 transitions. [2023-11-23 22:40:24,066 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 958 transitions. Word has length 87 [2023-11-23 22:40:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:24,066 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 958 transitions. [2023-11-23 22:40:24,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 958 transitions. [2023-11-23 22:40:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 22:40:24,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:24,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:24,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:40:24,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:24,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:24,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1557021119, now seen corresponding path program 1 times [2023-11-23 22:40:24,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:24,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748542240] [2023-11-23 22:40:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:24,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:24,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:24,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748542240] [2023-11-23 22:40:24,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748542240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:24,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:24,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:24,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682383525] [2023-11-23 22:40:24,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:24,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:24,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:24,398 INFO L87 Difference]: Start difference. First operand 580 states and 958 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:24,439 INFO L93 Difference]: Finished difference Result 584 states and 962 transitions. [2023-11-23 22:40:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:24,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2023-11-23 22:40:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:24,443 INFO L225 Difference]: With dead ends: 584 [2023-11-23 22:40:24,444 INFO L226 Difference]: Without dead ends: 582 [2023-11-23 22:40:24,444 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 [2023-11-23 22:40:24,447 INFO L413 NwaCegarLoop]: 849 mSDtfsCounter, 1 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2542 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:24,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2542 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-11-23 22:40:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 582. [2023-11-23 22:40:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.6523235800344234) internal successors, (960), 581 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 960 transitions. [2023-11-23 22:40:24,465 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 960 transitions. Word has length 88 [2023-11-23 22:40:24,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:24,465 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 960 transitions. [2023-11-23 22:40:24,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 960 transitions. [2023-11-23 22:40:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-23 22:40:24,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:24,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:24,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:40:24,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:24,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1021289005, now seen corresponding path program 1 times [2023-11-23 22:40:24,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:24,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900713162] [2023-11-23 22:40:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:24,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:24,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:24,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900713162] [2023-11-23 22:40:24,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900713162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:24,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:24,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:24,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962677097] [2023-11-23 22:40:24,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:24,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:24,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:24,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:24,693 INFO L87 Difference]: Start difference. First operand 582 states and 960 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:24,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:24,734 INFO L93 Difference]: Finished difference Result 1065 states and 1762 transitions. [2023-11-23 22:40:24,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:24,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2023-11-23 22:40:24,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:24,739 INFO L225 Difference]: With dead ends: 1065 [2023-11-23 22:40:24,739 INFO L226 Difference]: Without dead ends: 585 [2023-11-23 22:40:24,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:24,742 INFO L413 NwaCegarLoop]: 849 mSDtfsCounter, 1 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:24,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2540 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:24,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-11-23 22:40:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 584. [2023-11-23 22:40:24,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 1.6500857632933104) internal successors, (962), 583 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 962 transitions. [2023-11-23 22:40:24,761 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 962 transitions. Word has length 89 [2023-11-23 22:40:24,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:24,762 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 962 transitions. [2023-11-23 22:40:24,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 962 transitions. [2023-11-23 22:40:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-23 22:40:24,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:24,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:24,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:40:24,766 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:24,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:24,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1805620069, now seen corresponding path program 1 times [2023-11-23 22:40:24,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:24,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340176569] [2023-11-23 22:40:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:24,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:25,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:25,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340176569] [2023-11-23 22:40:25,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340176569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:25,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:25,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:25,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135777773] [2023-11-23 22:40:25,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:25,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:40:25,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:25,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:40:25,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:40:25,083 INFO L87 Difference]: Start difference. First operand 584 states and 962 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:25,169 INFO L93 Difference]: Finished difference Result 1554 states and 2574 transitions. [2023-11-23 22:40:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:40:25,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2023-11-23 22:40:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:25,177 INFO L225 Difference]: With dead ends: 1554 [2023-11-23 22:40:25,179 INFO L226 Difference]: Without dead ends: 1072 [2023-11-23 22:40:25,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:40:25,182 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 3256 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3256 SdHoareTripleChecker+Valid, 2668 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:25,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3256 Valid, 2668 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:25,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2023-11-23 22:40:25,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 599. [2023-11-23 22:40:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.648829431438127) internal successors, (986), 598 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 986 transitions. [2023-11-23 22:40:25,203 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 986 transitions. Word has length 90 [2023-11-23 22:40:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:25,204 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 986 transitions. [2023-11-23 22:40:25,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 986 transitions. [2023-11-23 22:40:25,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2023-11-23 22:40:25,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:25,212 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:25,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 22:40:25,213 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:25,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1099627728, now seen corresponding path program 1 times [2023-11-23 22:40:25,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:25,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654934522] [2023-11-23 22:40:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:25,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-23 22:40:26,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:26,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654934522] [2023-11-23 22:40:26,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654934522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:26,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:26,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:40:26,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679653429] [2023-11-23 22:40:26,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:26,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:40:26,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:40:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:40:26,710 INFO L87 Difference]: Start difference. First operand 599 states and 986 transitions. Second operand has 5 states, 5 states have (on average 69.2) internal successors, (346), 5 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:26,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:26,787 INFO L93 Difference]: Finished difference Result 1559 states and 2579 transitions. [2023-11-23 22:40:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:26,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 69.2) internal successors, (346), 5 states have internal predecessors, (346), 0 states have call successors, (0), 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 395 [2023-11-23 22:40:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:26,799 INFO L225 Difference]: With dead ends: 1559 [2023-11-23 22:40:26,799 INFO L226 Difference]: Without dead ends: 1077 [2023-11-23 22:40:26,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:40:26,804 INFO L413 NwaCegarLoop]: 977 mSDtfsCounter, 787 mSDsluCounter, 2603 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 3580 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:26,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 3580 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:26,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2023-11-23 22:40:26,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 599. [2023-11-23 22:40:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.648829431438127) internal successors, (986), 598 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 986 transitions. [2023-11-23 22:40:26,824 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 986 transitions. Word has length 395 [2023-11-23 22:40:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:26,826 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 986 transitions. [2023-11-23 22:40:26,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.2) internal successors, (346), 5 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 986 transitions. [2023-11-23 22:40:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2023-11-23 22:40:26,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:26,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:26,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 22:40:26,835 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:26,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:26,836 INFO L85 PathProgramCache]: Analyzing trace with hash 935601442, now seen corresponding path program 1 times [2023-11-23 22:40:26,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:26,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266685435] [2023-11-23 22:40:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:26,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-23 22:40:28,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:28,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266685435] [2023-11-23 22:40:28,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266685435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:28,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:28,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:28,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286366509] [2023-11-23 22:40:28,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:28,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:28,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:28,222 INFO L87 Difference]: Start difference. First operand 599 states and 986 transitions. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:28,290 INFO L93 Difference]: Finished difference Result 1561 states and 2581 transitions. [2023-11-23 22:40:28,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:28,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 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 396 [2023-11-23 22:40:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:28,299 INFO L225 Difference]: With dead ends: 1561 [2023-11-23 22:40:28,300 INFO L226 Difference]: Without dead ends: 1076 [2023-11-23 22:40:28,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:40:28,302 INFO L413 NwaCegarLoop]: 972 mSDtfsCounter, 784 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 2784 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:28,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 2784 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2023-11-23 22:40:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 601. [2023-11-23 22:40:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 1.6466666666666667) internal successors, (988), 600 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 988 transitions. [2023-11-23 22:40:28,331 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 988 transitions. Word has length 396 [2023-11-23 22:40:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:28,332 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 988 transitions. [2023-11-23 22:40:28,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 988 transitions. [2023-11-23 22:40:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-23 22:40:28,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:28,343 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:28,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 22:40:28,343 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:28,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:28,344 INFO L85 PathProgramCache]: Analyzing trace with hash -643407320, now seen corresponding path program 1 times [2023-11-23 22:40:28,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:28,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765665805] [2023-11-23 22:40:28,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:28,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:29,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:29,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765665805] [2023-11-23 22:40:29,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765665805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:29,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:29,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:29,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344752922] [2023-11-23 22:40:29,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:29,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:29,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:29,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:29,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:29,890 INFO L87 Difference]: Start difference. First operand 601 states and 988 transitions. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:30,297 INFO L93 Difference]: Finished difference Result 1087 states and 1792 transitions. [2023-11-23 22:40:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:30,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 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 397 [2023-11-23 22:40:30,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:30,301 INFO L225 Difference]: With dead ends: 1087 [2023-11-23 22:40:30,302 INFO L226 Difference]: Without dead ends: 601 [2023-11-23 22:40:30,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:30,303 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 802 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:30,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 1304 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:40:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2023-11-23 22:40:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2023-11-23 22:40:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 1.645) internal successors, (987), 600 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 987 transitions. [2023-11-23 22:40:30,322 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 987 transitions. Word has length 397 [2023-11-23 22:40:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:30,322 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 987 transitions. [2023-11-23 22:40:30,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 987 transitions. [2023-11-23 22:40:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2023-11-23 22:40:30,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:30,331 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:30,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 22:40:30,331 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:30,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:30,332 INFO L85 PathProgramCache]: Analyzing trace with hash -789791391, now seen corresponding path program 1 times [2023-11-23 22:40:30,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:30,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561090361] [2023-11-23 22:40:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:30,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 22:40:31,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:31,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561090361] [2023-11-23 22:40:31,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561090361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:31,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:31,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:40:31,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247539830] [2023-11-23 22:40:31,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:31,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:40:31,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:31,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:40:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:40:31,641 INFO L87 Difference]: Start difference. First operand 601 states and 987 transitions. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:31,730 INFO L93 Difference]: Finished difference Result 1567 states and 2584 transitions. [2023-11-23 22:40:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:31,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 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 398 [2023-11-23 22:40:31,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:31,738 INFO L225 Difference]: With dead ends: 1567 [2023-11-23 22:40:31,739 INFO L226 Difference]: Without dead ends: 1077 [2023-11-23 22:40:31,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:40:31,741 INFO L413 NwaCegarLoop]: 966 mSDtfsCounter, 780 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 3550 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:31,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 3550 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2023-11-23 22:40:31,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 603. [2023-11-23 22:40:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 1.6428571428571428) internal successors, (989), 602 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:31,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 989 transitions. [2023-11-23 22:40:31,771 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 989 transitions. Word has length 398 [2023-11-23 22:40:31,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:31,772 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 989 transitions. [2023-11-23 22:40:31,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 989 transitions. [2023-11-23 22:40:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2023-11-23 22:40:31,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:31,782 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:31,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 22:40:31,782 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:31,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:31,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1442779887, now seen corresponding path program 1 times [2023-11-23 22:40:31,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:31,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979725147] [2023-11-23 22:40:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:31,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-23 22:40:33,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:33,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979725147] [2023-11-23 22:40:33,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979725147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:33,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:33,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:40:33,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426419189] [2023-11-23 22:40:33,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:33,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:40:33,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:33,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:40:33,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:40:33,030 INFO L87 Difference]: Start difference. First operand 603 states and 989 transitions. Second operand has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:33,112 INFO L93 Difference]: Finished difference Result 1573 states and 2590 transitions. [2023-11-23 22:40:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 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 399 [2023-11-23 22:40:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:33,119 INFO L225 Difference]: With dead ends: 1573 [2023-11-23 22:40:33,120 INFO L226 Difference]: Without dead ends: 1078 [2023-11-23 22:40:33,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:40:33,122 INFO L413 NwaCegarLoop]: 961 mSDtfsCounter, 777 mSDsluCounter, 2576 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 3537 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:33,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 3537 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2023-11-23 22:40:33,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 605. [2023-11-23 22:40:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.640728476821192) internal successors, (991), 604 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 991 transitions. [2023-11-23 22:40:33,143 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 991 transitions. Word has length 399 [2023-11-23 22:40:33,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:33,144 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 991 transitions. [2023-11-23 22:40:33,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 991 transitions. [2023-11-23 22:40:33,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2023-11-23 22:40:33,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:33,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:33,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 22:40:33,153 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:33,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1582902213, now seen corresponding path program 1 times [2023-11-23 22:40:33,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:33,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537094357] [2023-11-23 22:40:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:33,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-23 22:40:34,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:34,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537094357] [2023-11-23 22:40:34,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537094357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:34,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:34,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:34,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206299341] [2023-11-23 22:40:34,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:34,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:34,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:34,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:34,229 INFO L87 Difference]: Start difference. First operand 605 states and 991 transitions. Second operand has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:34,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:34,300 INFO L93 Difference]: Finished difference Result 1582 states and 2600 transitions. [2023-11-23 22:40:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:34,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 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 400 [2023-11-23 22:40:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:34,308 INFO L225 Difference]: With dead ends: 1582 [2023-11-23 22:40:34,309 INFO L226 Difference]: Without dead ends: 1082 [2023-11-23 22:40:34,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:40:34,312 INFO L413 NwaCegarLoop]: 952 mSDtfsCounter, 772 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 2743 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:34,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 2743 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2023-11-23 22:40:34,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 612. [2023-11-23 22:40:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 1.6366612111292962) internal successors, (1000), 611 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1000 transitions. [2023-11-23 22:40:34,334 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1000 transitions. Word has length 400 [2023-11-23 22:40:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:34,334 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 1000 transitions. [2023-11-23 22:40:34,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:34,335 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1000 transitions. [2023-11-23 22:40:34,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2023-11-23 22:40:34,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:34,343 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:34,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 22:40:34,343 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:34,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2065480645, now seen corresponding path program 1 times [2023-11-23 22:40:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:34,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171377499] [2023-11-23 22:40:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:34,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-23 22:40:35,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:35,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171377499] [2023-11-23 22:40:35,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171377499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:35,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:35,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:35,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566518335] [2023-11-23 22:40:35,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:35,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:35,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:35,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:35,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:35,347 INFO L87 Difference]: Start difference. First operand 612 states and 1000 transitions. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:35,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:35,416 INFO L93 Difference]: Finished difference Result 1574 states and 2583 transitions. [2023-11-23 22:40:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 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 401 [2023-11-23 22:40:35,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:35,424 INFO L225 Difference]: With dead ends: 1574 [2023-11-23 22:40:35,424 INFO L226 Difference]: Without dead ends: 1079 [2023-11-23 22:40:35,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:35,426 INFO L413 NwaCegarLoop]: 1615 mSDtfsCounter, 766 mSDsluCounter, 2451 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 4066 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:35,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 4066 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:35,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2023-11-23 22:40:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 614. [2023-11-23 22:40:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.6345840130505709) internal successors, (1002), 613 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1002 transitions. [2023-11-23 22:40:35,451 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1002 transitions. Word has length 401 [2023-11-23 22:40:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:35,452 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 1002 transitions. [2023-11-23 22:40:35,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 4 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1002 transitions. [2023-11-23 22:40:35,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2023-11-23 22:40:35,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:35,460 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:35,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 22:40:35,461 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:35,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1734508373, now seen corresponding path program 1 times [2023-11-23 22:40:35,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:35,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000739737] [2023-11-23 22:40:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:35,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 22:40:36,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:36,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000739737] [2023-11-23 22:40:36,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000739737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:36,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:36,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:36,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310551774] [2023-11-23 22:40:36,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:36,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:36,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:36,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:36,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:36,540 INFO L87 Difference]: Start difference. First operand 614 states and 1002 transitions. Second operand has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:36,617 INFO L93 Difference]: Finished difference Result 1607 states and 2629 transitions. [2023-11-23 22:40:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:36,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 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 402 [2023-11-23 22:40:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:36,625 INFO L225 Difference]: With dead ends: 1607 [2023-11-23 22:40:36,625 INFO L226 Difference]: Without dead ends: 1094 [2023-11-23 22:40:36,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:40:36,628 INFO L413 NwaCegarLoop]: 944 mSDtfsCounter, 768 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 2727 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:36,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 2727 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2023-11-23 22:40:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 622. [2023-11-23 22:40:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 1.6296296296296295) internal successors, (1012), 621 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1012 transitions. [2023-11-23 22:40:36,654 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1012 transitions. Word has length 402 [2023-11-23 22:40:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:36,655 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 1012 transitions. [2023-11-23 22:40:36,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1012 transitions. [2023-11-23 22:40:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2023-11-23 22:40:36,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:36,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:36,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-23 22:40:36,666 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:36,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:36,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2034560545, now seen corresponding path program 1 times [2023-11-23 22:40:36,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:36,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230292336] [2023-11-23 22:40:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:36,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-23 22:40:37,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:37,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230292336] [2023-11-23 22:40:37,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230292336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:37,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:37,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:37,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236747600] [2023-11-23 22:40:37,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:37,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:37,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:37,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:37,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:37,737 INFO L87 Difference]: Start difference. First operand 622 states and 1012 transitions. Second operand has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:37,799 INFO L93 Difference]: Finished difference Result 1625 states and 2651 transitions. [2023-11-23 22:40:37,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:37,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 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 403 [2023-11-23 22:40:37,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:37,806 INFO L225 Difference]: With dead ends: 1625 [2023-11-23 22:40:37,807 INFO L226 Difference]: Without dead ends: 1101 [2023-11-23 22:40:37,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:40:37,809 INFO L413 NwaCegarLoop]: 939 mSDtfsCounter, 768 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 2717 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:37,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 2717 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2023-11-23 22:40:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 626. [2023-11-23 22:40:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 1.6256) internal successors, (1016), 625 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1016 transitions. [2023-11-23 22:40:37,831 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1016 transitions. Word has length 403 [2023-11-23 22:40:37,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:37,832 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 1016 transitions. [2023-11-23 22:40:37,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:37,832 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1016 transitions. [2023-11-23 22:40:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2023-11-23 22:40:37,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:37,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:37,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-23 22:40:37,841 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:37,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:37,842 INFO L85 PathProgramCache]: Analyzing trace with hash 281231473, now seen corresponding path program 1 times [2023-11-23 22:40:37,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:37,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139336163] [2023-11-23 22:40:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:37,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 22:40:38,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:38,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139336163] [2023-11-23 22:40:38,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139336163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:38,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:38,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:38,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208056486] [2023-11-23 22:40:38,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:38,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:38,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:38,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:38,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:38,740 INFO L87 Difference]: Start difference. First operand 626 states and 1016 transitions. Second operand has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:38,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:38,802 INFO L93 Difference]: Finished difference Result 1593 states and 2602 transitions. [2023-11-23 22:40:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:38,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 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 404 [2023-11-23 22:40:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:38,810 INFO L225 Difference]: With dead ends: 1593 [2023-11-23 22:40:38,810 INFO L226 Difference]: Without dead ends: 1091 [2023-11-23 22:40:38,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:38,812 INFO L413 NwaCegarLoop]: 1607 mSDtfsCounter, 760 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 4050 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:38,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 4050 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:38,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2023-11-23 22:40:38,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 628. [2023-11-23 22:40:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.6236044657097288) internal successors, (1018), 627 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1018 transitions. [2023-11-23 22:40:38,835 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1018 transitions. Word has length 404 [2023-11-23 22:40:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:38,836 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 1018 transitions. [2023-11-23 22:40:38,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1018 transitions. [2023-11-23 22:40:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2023-11-23 22:40:38,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:38,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:38,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-23 22:40:38,846 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:38,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:38,847 INFO L85 PathProgramCache]: Analyzing trace with hash 289923593, now seen corresponding path program 1 times [2023-11-23 22:40:38,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:38,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807856315] [2023-11-23 22:40:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:38,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-23 22:40:39,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:39,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807856315] [2023-11-23 22:40:39,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807856315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:39,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:39,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:39,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122002971] [2023-11-23 22:40:39,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:39,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:39,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:39,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:39,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:39,828 INFO L87 Difference]: Start difference. First operand 628 states and 1018 transitions. Second operand has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:39,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:39,889 INFO L93 Difference]: Finished difference Result 1649 states and 2675 transitions. [2023-11-23 22:40:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:39,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 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 405 [2023-11-23 22:40:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:39,897 INFO L225 Difference]: With dead ends: 1649 [2023-11-23 22:40:39,897 INFO L226 Difference]: Without dead ends: 1113 [2023-11-23 22:40:39,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:40:39,900 INFO L413 NwaCegarLoop]: 931 mSDtfsCounter, 762 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:39,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 2701 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:40:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2023-11-23 22:40:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 636. [2023-11-23 22:40:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.6188976377952755) internal successors, (1028), 635 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1028 transitions. [2023-11-23 22:40:39,927 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1028 transitions. Word has length 405 [2023-11-23 22:40:39,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:39,928 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 1028 transitions. [2023-11-23 22:40:39,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:39,928 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1028 transitions. [2023-11-23 22:40:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2023-11-23 22:40:39,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:39,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:39,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-23 22:40:39,933 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:39,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1655392139, now seen corresponding path program 1 times [2023-11-23 22:40:39,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:39,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132206390] [2023-11-23 22:40:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:39,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:41,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:41,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132206390] [2023-11-23 22:40:41,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132206390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:41,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507085204] [2023-11-23 22:40:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:41,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:41,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:41,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:40:41,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:40:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:41,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 22:40:41,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:40:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:42,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:40:42,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507085204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:42,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:40:42,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-11-23 22:40:42,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148673301] [2023-11-23 22:40:42,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:42,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:40:42,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:42,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:40:42,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:40:42,380 INFO L87 Difference]: Start difference. First operand 636 states and 1028 transitions. Second operand has 6 states, 6 states have (on average 67.66666666666667) internal successors, (406), 6 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:43,167 INFO L93 Difference]: Finished difference Result 1771 states and 2855 transitions. [2023-11-23 22:40:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:40:43,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 67.66666666666667) internal successors, (406), 6 states have internal predecessors, (406), 0 states have call successors, (0), 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 406 [2023-11-23 22:40:43,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:43,175 INFO L225 Difference]: With dead ends: 1771 [2023-11-23 22:40:43,175 INFO L226 Difference]: Without dead ends: 1264 [2023-11-23 22:40:43,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:40:43,177 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 761 mSDsluCounter, 2985 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 3743 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:43,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 3743 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 22:40:43,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2023-11-23 22:40:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 893. [2023-11-23 22:40:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.5986547085201794) internal successors, (1426), 892 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1426 transitions. [2023-11-23 22:40:43,206 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1426 transitions. Word has length 406 [2023-11-23 22:40:43,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:43,207 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1426 transitions. [2023-11-23 22:40:43,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.66666666666667) internal successors, (406), 6 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:43,208 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1426 transitions. [2023-11-23 22:40:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2023-11-23 22:40:43,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:43,212 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:43,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:40:43,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-23 22:40:43,436 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:43,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1875019108, now seen corresponding path program 1 times [2023-11-23 22:40:43,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:43,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104771970] [2023-11-23 22:40:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:43,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:44,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:44,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104771970] [2023-11-23 22:40:44,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104771970] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:44,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387006988] [2023-11-23 22:40:44,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:44,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:44,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:44,714 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:40:44,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:40:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:45,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:40:45,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:40:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:46,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:40:46,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387006988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:46,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:40:46,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-11-23 22:40:46,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120886965] [2023-11-23 22:40:46,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:46,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:40:46,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:46,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:40:46,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-23 22:40:46,011 INFO L87 Difference]: Start difference. First operand 893 states and 1426 transitions. Second operand has 6 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:40:46,927 INFO L93 Difference]: Finished difference Result 1902 states and 3078 transitions. [2023-11-23 22:40:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:40:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 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 407 [2023-11-23 22:40:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:40:46,935 INFO L225 Difference]: With dead ends: 1902 [2023-11-23 22:40:46,936 INFO L226 Difference]: Without dead ends: 1194 [2023-11-23 22:40:46,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:40:46,938 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 1304 mSDsluCounter, 2298 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 3133 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 22:40:46,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 3133 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 22:40:46,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2023-11-23 22:40:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1051. [2023-11-23 22:40:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 1.6076190476190477) internal successors, (1688), 1050 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1688 transitions. [2023-11-23 22:40:46,972 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1688 transitions. Word has length 407 [2023-11-23 22:40:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:40:46,972 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 1688 transitions. [2023-11-23 22:40:46,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:46,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1688 transitions. [2023-11-23 22:40:46,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2023-11-23 22:40:46,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:40:46,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:47,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:40:47,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-23 22:40:47,202 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:40:47,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:47,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1484619699, now seen corresponding path program 1 times [2023-11-23 22:40:47,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:47,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784958298] [2023-11-23 22:40:47,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:47,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:48,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:48,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784958298] [2023-11-23 22:40:48,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784958298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:48,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883412184] [2023-11-23 22:40:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:48,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:48,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:48,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:40:48,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d642d8b-af7d-451d-97a9-c604b35ef97d/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:40:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:48,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-23 22:40:48,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:40:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 22:40:50,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:40:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-23 22:40:50,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883412184] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:50,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:40:50,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 21] total 31 [2023-11-23 22:40:50,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054691309] [2023-11-23 22:40:50,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:50,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:40:50,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:50,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:40:50,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2023-11-23 22:40:50,769 INFO L87 Difference]: Start difference. First operand 1051 states and 1688 transitions. Second operand has 7 states, 7 states have (on average 52.285714285714285) internal successors, (366), 7 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)