./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:45:55,277 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:45:55,341 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:45:55,347 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:45:55,347 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:45:55,373 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:45:55,373 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:45:55,374 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:45:55,375 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:45:55,376 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:45:55,376 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:45:55,377 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:45:55,397 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:45:55,397 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:45:55,398 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:45:55,399 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:45:55,399 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:45:55,400 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:45:55,401 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:45:55,401 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:45:55,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:45:55,403 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:45:55,403 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:45:55,404 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:45:55,404 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:45:55,405 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:45:55,405 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:45:55,406 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:45:55,406 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:45:55,407 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:45:55,407 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:45:55,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:55,408 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:45:55,408 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:45:55,409 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:45:55,409 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:45:55,409 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:45:55,410 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:45:55,410 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:45:55,410 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:45:55,411 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:45:55,411 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:45:55,412 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_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 [2023-11-26 10:45:55,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:45:55,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:45:55,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:45:55,713 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:45:55,714 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:45:55,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/bitvector/byte_add_1-1.i [2023-11-26 10:45:58,930 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:45:59,208 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:45:59,210 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/sv-benchmarks/c/bitvector/byte_add_1-1.i [2023-11-26 10:45:59,226 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/data/72f6b696e/72dfdd85674e46edbb8e56f9f8c5f9d7/FLAG8ac837fb1 [2023-11-26 10:45:59,245 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/data/72f6b696e/72dfdd85674e46edbb8e56f9f8c5f9d7 [2023-11-26 10:45:59,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:45:59,254 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:45:59,258 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:59,258 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:45:59,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:45:59,267 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,268 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@351e6f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59, skipping insertion in model container [2023-11-26 10:45:59,269 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,314 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:45:59,522 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_7c1757aa-9f3a-4249-886a-6967d551eaea/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2023-11-26 10:45:59,570 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:59,581 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:45:59,595 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_7c1757aa-9f3a-4249-886a-6967d551eaea/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2023-11-26 10:45:59,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:59,642 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:45:59,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59 WrapperNode [2023-11-26 10:45:59,643 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:59,644 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:59,644 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:45:59,645 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:45:59,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,662 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,705 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 151 [2023-11-26 10:45:59,705 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:59,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:45:59,706 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:45:59,706 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:45:59,719 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,720 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,724 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,740 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:45:59,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,749 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,754 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,756 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,759 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,763 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:45:59,764 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:45:59,764 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:45:59,765 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:45:59,766 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (1/1) ... [2023-11-26 10:45:59,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:59,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:59,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:45:59,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:45:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:45:59,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:45:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:45:59,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:45:59,958 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:45:59,961 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:46:00,539 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:46:00,575 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:46:00,576 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:46:00,576 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:00 BoogieIcfgContainer [2023-11-26 10:46:00,576 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:46:00,580 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:46:00,581 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:46:00,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:46:00,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:45:59" (1/3) ... [2023-11-26 10:46:00,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116727cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:00, skipping insertion in model container [2023-11-26 10:46:00,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:59" (2/3) ... [2023-11-26 10:46:00,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116727cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:00, skipping insertion in model container [2023-11-26 10:46:00,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:00" (3/3) ... [2023-11-26 10:46:00,588 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2023-11-26 10:46:00,608 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:46:00,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:46:00,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:46:00,667 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;@3bb5f446, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:46:00,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:46:00,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.880952380952381) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 10:46:00,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:00,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:00,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:00,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:00,688 INFO L85 PathProgramCache]: Analyzing trace with hash -701051337, now seen corresponding path program 1 times [2023-11-26 10:46:00,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:00,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744671496] [2023-11-26 10:46:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:00,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:00,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:00,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744671496] [2023-11-26 10:46:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744671496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:00,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:00,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:46:00,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115486312] [2023-11-26 10:46:00,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:00,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:46:00,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:01,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:46:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:46:01,030 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.880952380952381) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:01,077 INFO L93 Difference]: Finished difference Result 62 states and 109 transitions. [2023-11-26 10:46:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:46:01,080 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2023-11-26 10:46:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:01,090 INFO L225 Difference]: With dead ends: 62 [2023-11-26 10:46:01,090 INFO L226 Difference]: Without dead ends: 42 [2023-11-26 10:46:01,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:46:01,100 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:01,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:01,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-26 10:46:01,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-26 10:46:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 74 transitions. [2023-11-26 10:46:01,159 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 74 transitions. Word has length 13 [2023-11-26 10:46:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:01,160 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 74 transitions. [2023-11-26 10:46:01,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 74 transitions. [2023-11-26 10:46:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-26 10:46:01,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:01,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:01,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:46:01,164 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:01,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1267888409, now seen corresponding path program 1 times [2023-11-26 10:46:01,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:01,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354273932] [2023-11-26 10:46:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:01,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:01,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:01,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354273932] [2023-11-26 10:46:01,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354273932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:01,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:01,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:46:01,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174677397] [2023-11-26 10:46:01,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:01,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:01,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:01,506 INFO L87 Difference]: Start difference. First operand 42 states and 74 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:01,733 INFO L93 Difference]: Finished difference Result 98 states and 177 transitions. [2023-11-26 10:46:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2023-11-26 10:46:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:01,738 INFO L225 Difference]: With dead ends: 98 [2023-11-26 10:46:01,738 INFO L226 Difference]: Without dead ends: 65 [2023-11-26 10:46:01,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:01,741 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 24 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:01,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 76 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-26 10:46:01,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2023-11-26 10:46:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.596774193548387) internal successors, (99), 62 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 99 transitions. [2023-11-26 10:46:01,766 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 99 transitions. Word has length 13 [2023-11-26 10:46:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:01,767 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 99 transitions. [2023-11-26 10:46:01,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 99 transitions. [2023-11-26 10:46:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 10:46:01,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:01,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:01,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:46:01,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:01,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:01,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1612037902, now seen corresponding path program 1 times [2023-11-26 10:46:01,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:01,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027072924] [2023-11-26 10:46:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:01,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:01,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:01,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027072924] [2023-11-26 10:46:01,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027072924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:01,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:01,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:46:01,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066860189] [2023-11-26 10:46:01,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:01,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:46:01,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:01,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:46:01,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:46:01,979 INFO L87 Difference]: Start difference. First operand 63 states and 99 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:02,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:02,322 INFO L93 Difference]: Finished difference Result 155 states and 270 transitions. [2023-11-26 10:46:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:46:02,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-26 10:46:02,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:02,325 INFO L225 Difference]: With dead ends: 155 [2023-11-26 10:46:02,325 INFO L226 Difference]: Without dead ends: 122 [2023-11-26 10:46:02,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:02,327 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 92 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:02,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 99 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:46:02,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-26 10:46:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2023-11-26 10:46:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.576470588235294) internal successors, (134), 85 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 134 transitions. [2023-11-26 10:46:02,341 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 134 transitions. Word has length 19 [2023-11-26 10:46:02,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:02,341 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 134 transitions. [2023-11-26 10:46:02,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:02,342 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 134 transitions. [2023-11-26 10:46:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:46:02,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:02,344 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:02,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:46:02,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:02,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:02,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1944328577, now seen corresponding path program 1 times [2023-11-26 10:46:02,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:02,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192275654] [2023-11-26 10:46:02,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:02,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:46:02,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:02,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192275654] [2023-11-26 10:46:02,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192275654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:02,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:02,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:46:02,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64710849] [2023-11-26 10:46:02,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:02,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:46:02,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:02,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:46:02,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:46:02,489 INFO L87 Difference]: Start difference. First operand 86 states and 134 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:02,725 INFO L93 Difference]: Finished difference Result 247 states and 380 transitions. [2023-11-26 10:46:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:46:02,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 25 [2023-11-26 10:46:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:02,728 INFO L225 Difference]: With dead ends: 247 [2023-11-26 10:46:02,728 INFO L226 Difference]: Without dead ends: 173 [2023-11-26 10:46:02,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:02,730 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 94 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:02,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 198 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-26 10:46:02,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 94. [2023-11-26 10:46:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.5376344086021505) internal successors, (143), 93 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 143 transitions. [2023-11-26 10:46:02,745 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 143 transitions. Word has length 25 [2023-11-26 10:46:02,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:02,745 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 143 transitions. [2023-11-26 10:46:02,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:02,746 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 143 transitions. [2023-11-26 10:46:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 10:46:02,747 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:02,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:02,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:46:02,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:02,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:02,749 INFO L85 PathProgramCache]: Analyzing trace with hash 889628198, now seen corresponding path program 1 times [2023-11-26 10:46:02,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:02,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691907721] [2023-11-26 10:46:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:02,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:46:02,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:02,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691907721] [2023-11-26 10:46:02,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691907721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:02,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:02,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:46:02,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789093722] [2023-11-26 10:46:02,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:02,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:46:02,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:02,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:46:02,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:46:02,922 INFO L87 Difference]: Start difference. First operand 94 states and 143 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:03,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:03,159 INFO L93 Difference]: Finished difference Result 268 states and 406 transitions. [2023-11-26 10:46:03,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:46:03,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 26 [2023-11-26 10:46:03,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:03,162 INFO L225 Difference]: With dead ends: 268 [2023-11-26 10:46:03,162 INFO L226 Difference]: Without dead ends: 193 [2023-11-26 10:46:03,163 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 [2023-11-26 10:46:03,164 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 98 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:03,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 206 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-26 10:46:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 104. [2023-11-26 10:46:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.5145631067961165) internal successors, (156), 103 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 156 transitions. [2023-11-26 10:46:03,180 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 156 transitions. Word has length 26 [2023-11-26 10:46:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:03,181 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 156 transitions. [2023-11-26 10:46:03,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 156 transitions. [2023-11-26 10:46:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 10:46:03,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:03,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:03,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:46:03,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:03,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:03,184 INFO L85 PathProgramCache]: Analyzing trace with hash -449843762, now seen corresponding path program 1 times [2023-11-26 10:46:03,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:03,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804144090] [2023-11-26 10:46:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:03,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:03,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:03,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804144090] [2023-11-26 10:46:03,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804144090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:03,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238956779] [2023-11-26 10:46:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:03,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:03,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:03,374 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:03,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:46:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:03,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:46:03,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 10:46:03,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:03,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238956779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:03,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:46:03,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-26 10:46:03,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840497450] [2023-11-26 10:46:03,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:03,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:46:03,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:03,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:46:03,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:46:03,571 INFO L87 Difference]: Start difference. First operand 104 states and 156 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:03,828 INFO L93 Difference]: Finished difference Result 221 states and 354 transitions. [2023-11-26 10:46:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:46:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 27 [2023-11-26 10:46:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:03,831 INFO L225 Difference]: With dead ends: 221 [2023-11-26 10:46:03,831 INFO L226 Difference]: Without dead ends: 149 [2023-11-26 10:46:03,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:46:03,832 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 37 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:03,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 134 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-26 10:46:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 133. [2023-11-26 10:46:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.446969696969697) internal successors, (191), 132 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 191 transitions. [2023-11-26 10:46:03,846 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 191 transitions. Word has length 27 [2023-11-26 10:46:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:03,847 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 191 transitions. [2023-11-26 10:46:03,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 191 transitions. [2023-11-26 10:46:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 10:46:03,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:03,850 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:03,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:04,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:46:04,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:04,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1572960125, now seen corresponding path program 1 times [2023-11-26 10:46:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:04,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125751531] [2023-11-26 10:46:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:04,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:04,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:04,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125751531] [2023-11-26 10:46:04,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125751531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:04,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810586703] [2023-11-26 10:46:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:04,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:04,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:04,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:04,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:46:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:04,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 10:46:04,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:46:04,416 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:04,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810586703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:04,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:46:04,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-26 10:46:04,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257738324] [2023-11-26 10:46:04,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:04,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:04,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:04,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:04,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:04,420 INFO L87 Difference]: Start difference. First operand 133 states and 191 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:04,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:04,780 INFO L93 Difference]: Finished difference Result 525 states and 771 transitions. [2023-11-26 10:46:04,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:46:04,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 33 [2023-11-26 10:46:04,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:04,783 INFO L225 Difference]: With dead ends: 525 [2023-11-26 10:46:04,783 INFO L226 Difference]: Without dead ends: 396 [2023-11-26 10:46:04,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:46:04,785 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 176 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:04,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 356 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:46:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-11-26 10:46:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 303. [2023-11-26 10:46:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.4105960264900663) internal successors, (426), 302 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 426 transitions. [2023-11-26 10:46:04,807 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 426 transitions. Word has length 33 [2023-11-26 10:46:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:04,807 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 426 transitions. [2023-11-26 10:46:04,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 426 transitions. [2023-11-26 10:46:04,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 10:46:04,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:04,811 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:04,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:05,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 10:46:05,017 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:05,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:05,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1205786005, now seen corresponding path program 1 times [2023-11-26 10:46:05,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:05,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288197253] [2023-11-26 10:46:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:05,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:46:05,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:05,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288197253] [2023-11-26 10:46:05,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288197253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:05,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626415934] [2023-11-26 10:46:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:05,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:05,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:05,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:05,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:46:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:05,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:46:05,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 10:46:05,315 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:05,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626415934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:05,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:46:05,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-11-26 10:46:05,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294876889] [2023-11-26 10:46:05,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:05,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:46:05,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:05,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:46:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:05,317 INFO L87 Difference]: Start difference. First operand 303 states and 426 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:05,548 INFO L93 Difference]: Finished difference Result 709 states and 1033 transitions. [2023-11-26 10:46:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:46:05,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 34 [2023-11-26 10:46:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:05,551 INFO L225 Difference]: With dead ends: 709 [2023-11-26 10:46:05,552 INFO L226 Difference]: Without dead ends: 433 [2023-11-26 10:46:05,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:05,558 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 36 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:05,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 134 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:05,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-26 10:46:05,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 361. [2023-11-26 10:46:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.3777777777777778) internal successors, (496), 360 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 496 transitions. [2023-11-26 10:46:05,581 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 496 transitions. Word has length 34 [2023-11-26 10:46:05,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:05,583 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 496 transitions. [2023-11-26 10:46:05,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:05,585 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 496 transitions. [2023-11-26 10:46:05,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 10:46:05,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:05,591 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:05,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:05,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 10:46:05,798 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:05,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:05,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1759920966, now seen corresponding path program 1 times [2023-11-26 10:46:05,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:05,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137583469] [2023-11-26 10:46:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:05,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-26 10:46:05,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:05,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137583469] [2023-11-26 10:46:05,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137583469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:05,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:05,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:46:05,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078399892] [2023-11-26 10:46:05,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:05,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:05,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:05,944 INFO L87 Difference]: Start difference. First operand 361 states and 496 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:06,306 INFO L93 Difference]: Finished difference Result 1438 states and 1956 transitions. [2023-11-26 10:46:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:46:06,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-26 10:46:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:06,314 INFO L225 Difference]: With dead ends: 1438 [2023-11-26 10:46:06,314 INFO L226 Difference]: Without dead ends: 1110 [2023-11-26 10:46:06,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:06,317 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 199 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:06,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 401 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:46:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2023-11-26 10:46:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 361. [2023-11-26 10:46:06,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.3777777777777778) internal successors, (496), 360 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 496 transitions. [2023-11-26 10:46:06,346 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 496 transitions. Word has length 40 [2023-11-26 10:46:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:06,347 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 496 transitions. [2023-11-26 10:46:06,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:06,347 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 496 transitions. [2023-11-26 10:46:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-26 10:46:06,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:06,349 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:06,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:46:06,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:06,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:06,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1087520423, now seen corresponding path program 1 times [2023-11-26 10:46:06,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:06,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108250628] [2023-11-26 10:46:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:06,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-26 10:46:06,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:06,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108250628] [2023-11-26 10:46:06,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108250628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:06,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:06,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 10:46:06,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734525425] [2023-11-26 10:46:06,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:06,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:46:06,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:06,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:46:06,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:46:06,617 INFO L87 Difference]: Start difference. First operand 361 states and 496 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:07,148 INFO L93 Difference]: Finished difference Result 749 states and 1024 transitions. [2023-11-26 10:46:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:46:07,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-26 10:46:07,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:07,152 INFO L225 Difference]: With dead ends: 749 [2023-11-26 10:46:07,152 INFO L226 Difference]: Without dead ends: 614 [2023-11-26 10:46:07,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:46:07,154 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 284 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:07,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 621 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:46:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-11-26 10:46:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 372. [2023-11-26 10:46:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 1.3692722371967656) internal successors, (508), 371 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:07,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 508 transitions. [2023-11-26 10:46:07,188 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 508 transitions. Word has length 41 [2023-11-26 10:46:07,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:07,188 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 508 transitions. [2023-11-26 10:46:07,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 508 transitions. [2023-11-26 10:46:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-26 10:46:07,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:07,190 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:07,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:46:07,190 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:07,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:07,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1156462875, now seen corresponding path program 1 times [2023-11-26 10:46:07,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:07,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900819903] [2023-11-26 10:46:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:07,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-26 10:46:07,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:07,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900819903] [2023-11-26 10:46:07,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900819903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:07,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:07,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:46:07,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260709297] [2023-11-26 10:46:07,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:07,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:07,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:07,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:07,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:07,364 INFO L87 Difference]: Start difference. First operand 372 states and 508 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:07,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:07,399 INFO L93 Difference]: Finished difference Result 722 states and 983 transitions. [2023-11-26 10:46:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:07,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-26 10:46:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:07,404 INFO L225 Difference]: With dead ends: 722 [2023-11-26 10:46:07,404 INFO L226 Difference]: Without dead ends: 352 [2023-11-26 10:46:07,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:07,405 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:07,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 67 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2023-11-26 10:46:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2023-11-26 10:46:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.358974358974359) internal successors, (477), 351 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 477 transitions. [2023-11-26 10:46:07,443 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 477 transitions. Word has length 41 [2023-11-26 10:46:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:07,444 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 477 transitions. [2023-11-26 10:46:07,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:07,444 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 477 transitions. [2023-11-26 10:46:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-26 10:46:07,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:07,446 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:07,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:46:07,446 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:07,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:07,447 INFO L85 PathProgramCache]: Analyzing trace with hash -49999210, now seen corresponding path program 1 times [2023-11-26 10:46:07,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:07,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114395100] [2023-11-26 10:46:07,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:07,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-26 10:46:07,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:07,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114395100] [2023-11-26 10:46:07,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114395100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:07,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:07,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:46:07,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391230573] [2023-11-26 10:46:07,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:07,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:46:07,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:07,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:46:07,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:07,542 INFO L87 Difference]: Start difference. First operand 352 states and 477 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:07,585 INFO L93 Difference]: Finished difference Result 492 states and 654 transitions. [2023-11-26 10:46:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:46:07,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 46 [2023-11-26 10:46:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:07,588 INFO L225 Difference]: With dead ends: 492 [2023-11-26 10:46:07,589 INFO L226 Difference]: Without dead ends: 449 [2023-11-26 10:46:07,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:46:07,590 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:07,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-26 10:46:07,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 437. [2023-11-26 10:46:07,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.3211009174311927) internal successors, (576), 436 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:07,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 576 transitions. [2023-11-26 10:46:07,631 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 576 transitions. Word has length 46 [2023-11-26 10:46:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:07,632 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 576 transitions. [2023-11-26 10:46:07,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:07,632 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 576 transitions. [2023-11-26 10:46:07,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-26 10:46:07,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:07,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:07,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:46:07,634 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:07,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:07,634 INFO L85 PathProgramCache]: Analyzing trace with hash 224760404, now seen corresponding path program 1 times [2023-11-26 10:46:07,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:07,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141071126] [2023-11-26 10:46:07,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:07,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 10:46:07,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:07,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141071126] [2023-11-26 10:46:07,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141071126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:07,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476154763] [2023-11-26 10:46:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:07,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:07,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:07,818 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:07,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:46:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:07,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:46:07,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-26 10:46:07,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:07,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476154763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:07,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:46:07,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-26 10:46:07,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615782296] [2023-11-26 10:46:07,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:07,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:46:07,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:07,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:46:07,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:46:07,980 INFO L87 Difference]: Start difference. First operand 437 states and 576 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:08,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:08,150 INFO L93 Difference]: Finished difference Result 976 states and 1299 transitions. [2023-11-26 10:46:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:46:08,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 46 [2023-11-26 10:46:08,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:08,153 INFO L225 Difference]: With dead ends: 976 [2023-11-26 10:46:08,154 INFO L226 Difference]: Without dead ends: 479 [2023-11-26 10:46:08,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:08,155 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 63 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:08,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 66 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:08,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-11-26 10:46:08,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 389. [2023-11-26 10:46:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.2860824742268042) internal successors, (499), 388 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 499 transitions. [2023-11-26 10:46:08,187 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 499 transitions. Word has length 46 [2023-11-26 10:46:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:08,187 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 499 transitions. [2023-11-26 10:46:08,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 499 transitions. [2023-11-26 10:46:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-26 10:46:08,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:08,189 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:08,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:08,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:46:08,396 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:08,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash 315293426, now seen corresponding path program 1 times [2023-11-26 10:46:08,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:08,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300091780] [2023-11-26 10:46:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:08,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 10:46:08,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:08,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300091780] [2023-11-26 10:46:08,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300091780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:08,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:08,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:46:08,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939096366] [2023-11-26 10:46:08,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:08,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:46:08,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:08,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:46:08,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:46:08,722 INFO L87 Difference]: Start difference. First operand 389 states and 499 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:08,893 INFO L93 Difference]: Finished difference Result 1193 states and 1522 transitions. [2023-11-26 10:46:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:46:08,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-26 10:46:08,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:08,909 INFO L225 Difference]: With dead ends: 1193 [2023-11-26 10:46:08,910 INFO L226 Difference]: Without dead ends: 830 [2023-11-26 10:46:08,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:08,911 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 160 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:08,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 155 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:46:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2023-11-26 10:46:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 587. [2023-11-26 10:46:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.2781569965870307) internal successors, (749), 586 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 749 transitions. [2023-11-26 10:46:08,969 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 749 transitions. Word has length 67 [2023-11-26 10:46:08,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:08,969 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 749 transitions. [2023-11-26 10:46:08,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 749 transitions. [2023-11-26 10:46:08,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-26 10:46:08,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:08,972 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:08,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 10:46:08,972 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:08,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:08,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1310614836, now seen corresponding path program 1 times [2023-11-26 10:46:08,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:08,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313754109] [2023-11-26 10:46:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:08,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 60 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 10:46:09,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:09,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313754109] [2023-11-26 10:46:09,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313754109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:09,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652337820] [2023-11-26 10:46:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:09,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:09,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:09,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:09,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:46:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:09,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 10:46:09,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-26 10:46:09,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-26 10:46:10,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652337820] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:10,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:10,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 20 [2023-11-26 10:46:10,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112527580] [2023-11-26 10:46:10,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:10,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 10:46:10,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 10:46:10,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-11-26 10:46:10,385 INFO L87 Difference]: Start difference. First operand 587 states and 749 transitions. Second operand has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:15,445 INFO L93 Difference]: Finished difference Result 2268 states and 2894 transitions. [2023-11-26 10:46:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-26 10:46:15,446 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-26 10:46:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:15,458 INFO L225 Difference]: With dead ends: 2268 [2023-11-26 10:46:15,458 INFO L226 Difference]: Without dead ends: 2260 [2023-11-26 10:46:15,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1883, Invalid=7047, Unknown=0, NotChecked=0, Total=8930 [2023-11-26 10:46:15,463 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 818 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:15,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 1929 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-26 10:46:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2023-11-26 10:46:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 981. [2023-11-26 10:46:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.3081632653061224) internal successors, (1282), 980 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1282 transitions. [2023-11-26 10:46:15,555 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1282 transitions. Word has length 67 [2023-11-26 10:46:15,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:15,556 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1282 transitions. [2023-11-26 10:46:15,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1282 transitions. [2023-11-26 10:46:15,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-26 10:46:15,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:15,559 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:15,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:15,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 10:46:15,764 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:15,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1049730223, now seen corresponding path program 1 times [2023-11-26 10:46:15,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:15,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904376527] [2023-11-26 10:46:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:15,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-26 10:46:16,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:16,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904376527] [2023-11-26 10:46:16,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904376527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:16,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:16,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 10:46:16,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927967284] [2023-11-26 10:46:16,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:16,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 10:46:16,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:16,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 10:46:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 10:46:16,076 INFO L87 Difference]: Start difference. First operand 981 states and 1282 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:16,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:16,802 INFO L93 Difference]: Finished difference Result 2278 states and 3001 transitions. [2023-11-26 10:46:16,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:46:16,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-26 10:46:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:16,814 INFO L225 Difference]: With dead ends: 2278 [2023-11-26 10:46:16,815 INFO L226 Difference]: Without dead ends: 1673 [2023-11-26 10:46:16,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:46:16,817 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 307 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:16,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 554 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:46:16,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2023-11-26 10:46:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 977. [2023-11-26 10:46:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 1.3094262295081966) internal successors, (1278), 976 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:16,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1278 transitions. [2023-11-26 10:46:16,918 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1278 transitions. Word has length 69 [2023-11-26 10:46:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:16,918 INFO L495 AbstractCegarLoop]: Abstraction has 977 states and 1278 transitions. [2023-11-26 10:46:16,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:16,919 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1278 transitions. [2023-11-26 10:46:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-26 10:46:16,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:16,923 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:16,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 10:46:16,924 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:16,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:16,924 INFO L85 PathProgramCache]: Analyzing trace with hash -667674692, now seen corresponding path program 1 times [2023-11-26 10:46:16,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:16,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993371077] [2023-11-26 10:46:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:16,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-26 10:46:17,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993371077] [2023-11-26 10:46:17,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993371077] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978051643] [2023-11-26 10:46:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:17,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:17,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:17,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:17,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:46:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:17,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:46:17,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-26 10:46:17,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-26 10:46:17,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978051643] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:17,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:17,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2023-11-26 10:46:17,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137504664] [2023-11-26 10:46:17,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:17,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 10:46:17,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:17,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 10:46:17,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:46:17,937 INFO L87 Difference]: Start difference. First operand 977 states and 1278 transitions. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:19,411 INFO L93 Difference]: Finished difference Result 3069 states and 4034 transitions. [2023-11-26 10:46:19,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 10:46:19,412 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-26 10:46:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:19,424 INFO L225 Difference]: With dead ends: 3069 [2023-11-26 10:46:19,424 INFO L226 Difference]: Without dead ends: 2061 [2023-11-26 10:46:19,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2023-11-26 10:46:19,427 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 716 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:19,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 556 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 10:46:19,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2023-11-26 10:46:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1687. [2023-11-26 10:46:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.2965599051008303) internal successors, (2186), 1686 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2186 transitions. [2023-11-26 10:46:19,618 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2186 transitions. Word has length 71 [2023-11-26 10:46:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:19,620 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 2186 transitions. [2023-11-26 10:46:19,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2186 transitions. [2023-11-26 10:46:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-26 10:46:19,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:19,626 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:19,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:19,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 10:46:19,834 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:19,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:19,835 INFO L85 PathProgramCache]: Analyzing trace with hash 64292734, now seen corresponding path program 1 times [2023-11-26 10:46:19,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:19,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660634523] [2023-11-26 10:46:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:19,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 10:46:20,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660634523] [2023-11-26 10:46:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660634523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712067390] [2023-11-26 10:46:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:20,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:20,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:20,368 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:20,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:46:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:20,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 10:46:20,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-26 10:46:21,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 10:46:21,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712067390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:21,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:21,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 10:46:21,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126058066] [2023-11-26 10:46:21,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:21,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:46:21,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:21,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:46:21,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:46:21,181 INFO L87 Difference]: Start difference. First operand 1687 states and 2186 transitions. Second operand has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:21,889 INFO L93 Difference]: Finished difference Result 3460 states and 4436 transitions. [2023-11-26 10:46:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:46:21,890 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-26 10:46:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:21,900 INFO L225 Difference]: With dead ends: 3460 [2023-11-26 10:46:21,901 INFO L226 Difference]: Without dead ends: 1845 [2023-11-26 10:46:21,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-26 10:46:21,905 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 232 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:21,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 554 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 10:46:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2023-11-26 10:46:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1377. [2023-11-26 10:46:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 1.273982558139535) internal successors, (1753), 1376 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 1753 transitions. [2023-11-26 10:46:22,085 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 1753 transitions. Word has length 71 [2023-11-26 10:46:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:22,085 INFO L495 AbstractCegarLoop]: Abstraction has 1377 states and 1753 transitions. [2023-11-26 10:46:22,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 1753 transitions. [2023-11-26 10:46:22,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-26 10:46:22,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:22,089 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:46:22,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:22,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 10:46:22,295 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:22,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:22,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1987520768, now seen corresponding path program 2 times [2023-11-26 10:46:22,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:22,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2338002] [2023-11-26 10:46:22,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:22,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 56 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 10:46:23,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:23,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2338002] [2023-11-26 10:46:23,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2338002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:23,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34834812] [2023-11-26 10:46:23,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:46:23,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:23,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:23,095 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:23,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c1757aa-9f3a-4249-886a-6967d551eaea/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:46:23,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:46:23,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:46:23,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-26 10:46:23,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-26 10:46:24,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 10:46:25,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34834812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:46:25,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:46:25,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 9] total 27 [2023-11-26 10:46:25,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526063498] [2023-11-26 10:46:25,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:46:25,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 10:46:25,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:25,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 10:46:25,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-11-26 10:46:25,704 INFO L87 Difference]: Start difference. First operand 1377 states and 1753 transitions. Second operand has 27 states, 27 states have (on average 7.037037037037037) internal successors, (190), 27 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:46:44,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:44,110 INFO L93 Difference]: Finished difference Result 9708 states and 11992 transitions. [2023-11-26 10:46:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-11-26 10:46:44,110 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 7.037037037037037) internal successors, (190), 27 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-26 10:46:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:44,161 INFO L225 Difference]: With dead ends: 9708 [2023-11-26 10:46:44,161 INFO L226 Difference]: Without dead ends: 9702 [2023-11-26 10:46:44,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6828 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=3353, Invalid=17239, Unknown=0, NotChecked=0, Total=20592 [2023-11-26 10:46:44,173 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 1946 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1946 SdHoareTripleChecker+Valid, 2464 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:44,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1946 Valid, 2464 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1935 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-26 10:46:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9702 states.