./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu --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 11f2e72cb8a06a1896873093a1b872fd2dead3c7d91302c62d439cf7642b18a1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:56:22,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:56:23,017 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:56:23,022 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:56:23,023 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:56:23,052 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:56:23,052 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:56:23,053 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:56:23,054 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:56:23,055 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:56:23,056 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:56:23,056 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:56:23,057 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:56:23,058 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:56:23,058 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:56:23,059 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:56:23,060 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:56:23,060 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:56:23,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:56:23,061 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:56:23,062 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:56:23,068 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:56:23,068 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:56:23,069 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:56:23,069 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:56:23,070 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:56:23,070 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:56:23,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:56:23,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:23,072 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:56:23,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:56:23,073 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:56:23,073 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:56:23,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:56:23,074 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:56:23,074 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:56:23,075 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:56:23,075 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:56:23,076 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:56:23,076 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_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11f2e72cb8a06a1896873093a1b872fd2dead3c7d91302c62d439cf7642b18a1 [2023-11-19 07:56:23,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:56:23,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:56:23,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:56:23,402 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:56:23,403 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:56:23,404 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label08.c [2023-11-19 07:56:26,891 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:56:27,498 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:56:27,498 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label08.c [2023-11-19 07:56:27,534 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/data/ff9edbcc6/97288743ce19432badc2233641b459da/FLAG57c706c54 [2023-11-19 07:56:27,556 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/data/ff9edbcc6/97288743ce19432badc2233641b459da [2023-11-19 07:56:27,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:56:27,570 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:56:27,574 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:27,575 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:56:27,581 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:56:27,582 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:27" (1/1) ... [2023-11-19 07:56:27,584 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cfd3554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:27, skipping insertion in model container [2023-11-19 07:56:27,584 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:27" (1/1) ... [2023-11-19 07:56:27,754 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:56:28,124 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_4825c48b-af03-4ffb-a747-946d138ce747/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label08.c[8712,8725] [2023-11-19 07:56:28,180 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_4825c48b-af03-4ffb-a747-946d138ce747/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label08.c[12219,12232] [2023-11-19 07:56:29,249 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:29,264 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:56:29,305 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_4825c48b-af03-4ffb-a747-946d138ce747/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label08.c[8712,8725] [2023-11-19 07:56:29,314 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_4825c48b-af03-4ffb-a747-946d138ce747/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label08.c[12219,12232] [2023-11-19 07:56:29,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:30,021 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:56:30,022 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30 WrapperNode [2023-11-19 07:56:30,022 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:30,024 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:30,024 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:56:30,024 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:56:30,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30" (1/1) ... [2023-11-19 07:56:30,095 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30" (1/1) ... [2023-11-19 07:56:30,395 INFO L138 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5034 [2023-11-19 07:56:30,395 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:30,396 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:56:30,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:56:30,397 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:56:30,407 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30" (1/1) ... [2023-11-19 07:56:30,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30" (1/1) ... [2023-11-19 07:56:30,549 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30" (1/1) ... [2023-11-19 07:56:30,549 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30" (1/1) ... [2023-11-19 07:56:30,741 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30" (1/1) ... [2023-11-19 07:56:30,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30" (1/1) ... [2023-11-19 07:56:30,834 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30" (1/1) ... [2023-11-19 07:56:30,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30" (1/1) ... [2023-11-19 07:56:30,976 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:56:30,977 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:56:30,977 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:56:30,978 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:56:30,979 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30" (1/1) ... [2023-11-19 07:56:30,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:31,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:31,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:56:31,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:56:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:56:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:56:31,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:56:31,207 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:56:31,210 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:56:36,591 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:56:36,609 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:56:36,610 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:56:36,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:36 BoogieIcfgContainer [2023-11-19 07:56:36,624 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:56:36,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:56:36,627 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:56:36,630 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:56:36,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:27" (1/3) ... [2023-11-19 07:56:36,631 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c44a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:36, skipping insertion in model container [2023-11-19 07:56:36,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:30" (2/3) ... [2023-11-19 07:56:36,632 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c44a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:36, skipping insertion in model container [2023-11-19 07:56:36,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:36" (3/3) ... [2023-11-19 07:56:36,634 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label08.c [2023-11-19 07:56:36,655 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:56:36,655 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 07:56:36,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:36,804 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;@3272e1e1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:36,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 07:56:36,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 887 states, 884 states have (on average 1.9049773755656108) internal successors, (1684), 886 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 07:56:36,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:36,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:36,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:36,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:36,840 INFO L85 PathProgramCache]: Analyzing trace with hash 593970293, now seen corresponding path program 1 times [2023-11-19 07:56:36,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:36,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339542954] [2023-11-19 07:56:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:36,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:37,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:37,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339542954] [2023-11-19 07:56:37,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339542954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:37,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:37,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:56:37,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934640023] [2023-11-19 07:56:37,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:37,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:56:37,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:56:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:56:37,227 INFO L87 Difference]: Start difference. First operand has 887 states, 884 states have (on average 1.9049773755656108) internal successors, (1684), 886 states have internal predecessors, (1684), 0 states have call successors, (0), 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 11.0) internal successors, (22), 2 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) [2023-11-19 07:56:37,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:37,336 INFO L93 Difference]: Finished difference Result 1743 states and 3312 transitions. [2023-11-19 07:56:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:56:37,338 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 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 22 [2023-11-19 07:56:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:37,360 INFO L225 Difference]: With dead ends: 1743 [2023-11-19 07:56:37,361 INFO L226 Difference]: Without dead ends: 821 [2023-11-19 07:56:37,367 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 [2023-11-19 07:56:37,371 INFO L413 NwaCegarLoop]: 1615 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:37,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:37,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2023-11-19 07:56:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 821. [2023-11-19 07:56:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 819 states have (on average 1.8937728937728937) internal successors, (1551), 820 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1551 transitions. [2023-11-19 07:56:37,459 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1551 transitions. Word has length 22 [2023-11-19 07:56:37,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:37,459 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1551 transitions. [2023-11-19 07:56:37,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 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) [2023-11-19 07:56:37,460 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1551 transitions. [2023-11-19 07:56:37,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 07:56:37,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:37,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:37,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:56:37,463 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:37,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash -427098061, now seen corresponding path program 1 times [2023-11-19 07:56:37,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:37,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89933564] [2023-11-19 07:56:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:37,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:37,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:37,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89933564] [2023-11-19 07:56:37,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89933564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:37,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:37,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:56:37,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858711012] [2023-11-19 07:56:37,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:37,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:56:37,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:37,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:56:37,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:56:37,738 INFO L87 Difference]: Start difference. First operand 821 states and 1551 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2023-11-19 07:56:37,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:37,916 INFO L93 Difference]: Finished difference Result 863 states and 1615 transitions. [2023-11-19 07:56:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:56:37,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 22 [2023-11-19 07:56:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:37,924 INFO L225 Difference]: With dead ends: 863 [2023-11-19 07:56:37,925 INFO L226 Difference]: Without dead ends: 821 [2023-11-19 07:56:37,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:56:37,928 INFO L413 NwaCegarLoop]: 1549 mSDtfsCounter, 2 mSDsluCounter, 4619 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6168 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:37,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6168 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:56:37,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2023-11-19 07:56:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 821. [2023-11-19 07:56:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 819 states have (on average 1.8656898656898657) internal successors, (1528), 820 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1528 transitions. [2023-11-19 07:56:37,965 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1528 transitions. Word has length 22 [2023-11-19 07:56:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:37,966 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 1528 transitions. [2023-11-19 07:56:37,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2023-11-19 07:56:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1528 transitions. [2023-11-19 07:56:37,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 07:56:37,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:37,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:37,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:56:37,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:37,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1055339155, now seen corresponding path program 1 times [2023-11-19 07:56:37,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:37,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95359642] [2023-11-19 07:56:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:37,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:38,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:38,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95359642] [2023-11-19 07:56:38,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95359642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:38,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:38,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:56:38,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606296233] [2023-11-19 07:56:38,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:38,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:38,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:38,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:38,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:38,123 INFO L87 Difference]: Start difference. First operand 821 states and 1528 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:42,591 INFO L93 Difference]: Finished difference Result 2325 states and 4401 transitions. [2023-11-19 07:56:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:42,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2023-11-19 07:56:42,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:42,606 INFO L225 Difference]: With dead ends: 2325 [2023-11-19 07:56:42,606 INFO L226 Difference]: Without dead ends: 1572 [2023-11-19 07:56:42,608 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 [2023-11-19 07:56:42,609 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 928 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 711 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 3088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 711 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:42,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 204 Invalid, 3088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [711 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-19 07:56:42,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2023-11-19 07:56:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1572. [2023-11-19 07:56:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1570 states have (on average 1.8261146496815286) internal successors, (2867), 1571 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2867 transitions. [2023-11-19 07:56:42,657 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2867 transitions. Word has length 30 [2023-11-19 07:56:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:42,658 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 2867 transitions. [2023-11-19 07:56:42,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2867 transitions. [2023-11-19 07:56:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 07:56:42,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:42,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:42,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:56:42,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:42,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:42,662 INFO L85 PathProgramCache]: Analyzing trace with hash 3301806, now seen corresponding path program 1 times [2023-11-19 07:56:42,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:42,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063946491] [2023-11-19 07:56:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:42,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:42,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:42,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063946491] [2023-11-19 07:56:42,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063946491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:42,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:42,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:56:42,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687603520] [2023-11-19 07:56:42,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:42,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:56:42,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:56:42,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:42,801 INFO L87 Difference]: Start difference. First operand 1572 states and 2867 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 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) [2023-11-19 07:56:42,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:42,989 INFO L93 Difference]: Finished difference Result 1876 states and 3347 transitions. [2023-11-19 07:56:42,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:56:42,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-19 07:56:42,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:43,003 INFO L225 Difference]: With dead ends: 1876 [2023-11-19 07:56:43,003 INFO L226 Difference]: Without dead ends: 1838 [2023-11-19 07:56:43,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:56:43,005 INFO L413 NwaCegarLoop]: 1522 mSDtfsCounter, 6285 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6285 SdHoareTripleChecker+Valid, 2135 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:43,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6285 Valid, 2135 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:56:43,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2023-11-19 07:56:43,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1608. [2023-11-19 07:56:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1606 states have (on average 1.8206724782067247) internal successors, (2924), 1607 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2924 transitions. [2023-11-19 07:56:43,100 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2924 transitions. Word has length 44 [2023-11-19 07:56:43,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:43,102 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2924 transitions. [2023-11-19 07:56:43,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 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) [2023-11-19 07:56:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2924 transitions. [2023-11-19 07:56:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 07:56:43,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:43,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:43,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:56:43,111 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:43,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:43,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1757336638, now seen corresponding path program 1 times [2023-11-19 07:56:43,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:43,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235141963] [2023-11-19 07:56:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:43,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:43,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:43,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235141963] [2023-11-19 07:56:43,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235141963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:43,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:43,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:56:43,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343986318] [2023-11-19 07:56:43,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:43,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:43,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:43,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:43,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:43,221 INFO L87 Difference]: Start difference. First operand 1608 states and 2924 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:43,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:43,275 INFO L93 Difference]: Finished difference Result 1745 states and 3139 transitions. [2023-11-19 07:56:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:43,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 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 [2023-11-19 07:56:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:43,287 INFO L225 Difference]: With dead ends: 1745 [2023-11-19 07:56:43,287 INFO L226 Difference]: Without dead ends: 1671 [2023-11-19 07:56:43,288 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 [2023-11-19 07:56:43,289 INFO L413 NwaCegarLoop]: 1524 mSDtfsCounter, 1476 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:43,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 1577 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2023-11-19 07:56:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1667. [2023-11-19 07:56:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1665 states have (on average 1.8102102102102102) internal successors, (3014), 1666 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 3014 transitions. [2023-11-19 07:56:43,343 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 3014 transitions. Word has length 46 [2023-11-19 07:56:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:43,344 INFO L495 AbstractCegarLoop]: Abstraction has 1667 states and 3014 transitions. [2023-11-19 07:56:43,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 3014 transitions. [2023-11-19 07:56:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 07:56:43,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:43,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:43,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:56:43,346 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:43,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:43,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1823830150, now seen corresponding path program 1 times [2023-11-19 07:56:43,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:43,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899653811] [2023-11-19 07:56:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:43,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:43,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:43,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899653811] [2023-11-19 07:56:43,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899653811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:43,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:43,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:56:43,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076529083] [2023-11-19 07:56:43,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:43,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:56:43,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:43,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:56:43,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:43,605 INFO L87 Difference]: Start difference. First operand 1667 states and 3014 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:43,759 INFO L93 Difference]: Finished difference Result 1802 states and 3222 transitions. [2023-11-19 07:56:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:43,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 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 [2023-11-19 07:56:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:43,771 INFO L225 Difference]: With dead ends: 1802 [2023-11-19 07:56:43,772 INFO L226 Difference]: Without dead ends: 1669 [2023-11-19 07:56:43,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:56:43,774 INFO L413 NwaCegarLoop]: 1522 mSDtfsCounter, 4455 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4455 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:43,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4455 Valid, 1690 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:43,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2023-11-19 07:56:43,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1667. [2023-11-19 07:56:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1665 states have (on average 1.809009009009009) internal successors, (3012), 1666 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 3012 transitions. [2023-11-19 07:56:43,837 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 3012 transitions. Word has length 46 [2023-11-19 07:56:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:43,837 INFO L495 AbstractCegarLoop]: Abstraction has 1667 states and 3012 transitions. [2023-11-19 07:56:43,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 3012 transitions. [2023-11-19 07:56:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 07:56:43,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:43,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:43,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:56:43,840 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:43,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:43,840 INFO L85 PathProgramCache]: Analyzing trace with hash 289436656, now seen corresponding path program 1 times [2023-11-19 07:56:43,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:43,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120438560] [2023-11-19 07:56:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:43,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:44,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:44,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120438560] [2023-11-19 07:56:44,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120438560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:44,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:44,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:56:44,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108156628] [2023-11-19 07:56:44,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:44,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:56:44,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:44,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:56:44,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:56:44,098 INFO L87 Difference]: Start difference. First operand 1667 states and 3012 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:44,199 INFO L93 Difference]: Finished difference Result 1767 states and 3168 transitions. [2023-11-19 07:56:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:44,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-19 07:56:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:44,211 INFO L225 Difference]: With dead ends: 1767 [2023-11-19 07:56:44,211 INFO L226 Difference]: Without dead ends: 1765 [2023-11-19 07:56:44,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:56:44,213 INFO L413 NwaCegarLoop]: 1568 mSDtfsCounter, 48 mSDsluCounter, 4652 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 6220 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:44,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 6220 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2023-11-19 07:56:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1673. [2023-11-19 07:56:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1671 states have (on average 1.8055056852184321) internal successors, (3017), 1672 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 3017 transitions. [2023-11-19 07:56:44,269 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 3017 transitions. Word has length 47 [2023-11-19 07:56:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:44,270 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 3017 transitions. [2023-11-19 07:56:44,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 3017 transitions. [2023-11-19 07:56:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 07:56:44,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:44,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:44,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:56:44,272 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:44,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:44,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2036800602, now seen corresponding path program 1 times [2023-11-19 07:56:44,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:44,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959099449] [2023-11-19 07:56:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:44,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:44,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:44,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959099449] [2023-11-19 07:56:44,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959099449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:44,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:44,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:56:44,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192201101] [2023-11-19 07:56:44,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:44,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:44,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:44,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:44,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:44,394 INFO L87 Difference]: Start difference. First operand 1673 states and 3017 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:44,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:44,450 INFO L93 Difference]: Finished difference Result 1935 states and 3409 transitions. [2023-11-19 07:56:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:44,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2023-11-19 07:56:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:44,464 INFO L225 Difference]: With dead ends: 1935 [2023-11-19 07:56:44,464 INFO L226 Difference]: Without dead ends: 1796 [2023-11-19 07:56:44,465 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 [2023-11-19 07:56:44,466 INFO L413 NwaCegarLoop]: 1565 mSDtfsCounter, 1487 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:44,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 1630 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:44,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2023-11-19 07:56:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1794. [2023-11-19 07:56:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1792 states have (on average 1.7823660714285714) internal successors, (3194), 1793 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 3194 transitions. [2023-11-19 07:56:44,540 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 3194 transitions. Word has length 48 [2023-11-19 07:56:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:44,541 INFO L495 AbstractCegarLoop]: Abstraction has 1794 states and 3194 transitions. [2023-11-19 07:56:44,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 3194 transitions. [2023-11-19 07:56:44,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 07:56:44,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:44,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:44,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:56:44,543 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:44,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:44,544 INFO L85 PathProgramCache]: Analyzing trace with hash 42697894, now seen corresponding path program 1 times [2023-11-19 07:56:44,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:44,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519527584] [2023-11-19 07:56:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:44,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:44,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:44,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519527584] [2023-11-19 07:56:44,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519527584] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:44,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:44,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:56:44,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055439134] [2023-11-19 07:56:44,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:44,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:44,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:44,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:44,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:44,609 INFO L87 Difference]: Start difference. First operand 1794 states and 3194 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:44,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:44,670 INFO L93 Difference]: Finished difference Result 2282 states and 3912 transitions. [2023-11-19 07:56:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:44,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2023-11-19 07:56:44,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:44,684 INFO L225 Difference]: With dead ends: 2282 [2023-11-19 07:56:44,684 INFO L226 Difference]: Without dead ends: 2022 [2023-11-19 07:56:44,686 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 [2023-11-19 07:56:44,686 INFO L413 NwaCegarLoop]: 1563 mSDtfsCounter, 1485 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:44,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 1632 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2023-11-19 07:56:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 2020. [2023-11-19 07:56:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2018 states have (on average 1.7423191278493557) internal successors, (3516), 2019 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3516 transitions. [2023-11-19 07:56:44,772 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3516 transitions. Word has length 48 [2023-11-19 07:56:44,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:44,773 INFO L495 AbstractCegarLoop]: Abstraction has 2020 states and 3516 transitions. [2023-11-19 07:56:44,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3516 transitions. [2023-11-19 07:56:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 07:56:44,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:44,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:44,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:56:44,775 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:44,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1823630758, now seen corresponding path program 1 times [2023-11-19 07:56:44,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:44,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380581431] [2023-11-19 07:56:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:44,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:44,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:44,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380581431] [2023-11-19 07:56:44,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380581431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:44,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:44,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:56:44,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374759849] [2023-11-19 07:56:44,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:44,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:44,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:44,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:44,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:44,864 INFO L87 Difference]: Start difference. First operand 2020 states and 3516 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:44,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:44,944 INFO L93 Difference]: Finished difference Result 2928 states and 4822 transitions. [2023-11-19 07:56:44,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:44,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2023-11-19 07:56:44,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:44,960 INFO L225 Difference]: With dead ends: 2928 [2023-11-19 07:56:44,961 INFO L226 Difference]: Without dead ends: 2442 [2023-11-19 07:56:44,962 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 [2023-11-19 07:56:44,963 INFO L413 NwaCegarLoop]: 1561 mSDtfsCounter, 1483 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:44,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1483 Valid, 1634 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:44,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2023-11-19 07:56:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2440. [2023-11-19 07:56:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2438 states have (on average 1.6800656275635768) internal successors, (4096), 2439 states have internal predecessors, (4096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 4096 transitions. [2023-11-19 07:56:45,073 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 4096 transitions. Word has length 48 [2023-11-19 07:56:45,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:45,073 INFO L495 AbstractCegarLoop]: Abstraction has 2440 states and 4096 transitions. [2023-11-19 07:56:45,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 4096 transitions. [2023-11-19 07:56:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 07:56:45,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:45,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:45,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:56:45,076 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:45,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash 246335073, now seen corresponding path program 1 times [2023-11-19 07:56:45,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:45,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321662507] [2023-11-19 07:56:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:45,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:45,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:45,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321662507] [2023-11-19 07:56:45,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321662507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:45,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:45,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:56:45,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133112574] [2023-11-19 07:56:45,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:45,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:45,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:45,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:45,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:45,141 INFO L87 Difference]: Start difference. First operand 2440 states and 4096 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:45,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:45,229 INFO L93 Difference]: Finished difference Result 3407 states and 5494 transitions. [2023-11-19 07:56:45,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:45,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2023-11-19 07:56:45,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:45,248 INFO L225 Difference]: With dead ends: 3407 [2023-11-19 07:56:45,248 INFO L226 Difference]: Without dead ends: 2876 [2023-11-19 07:56:45,250 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 [2023-11-19 07:56:45,251 INFO L413 NwaCegarLoop]: 1570 mSDtfsCounter, 1486 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:45,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 1631 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2023-11-19 07:56:45,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2874. [2023-11-19 07:56:45,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2872 states have (on average 1.6357938718662952) internal successors, (4698), 2873 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 4698 transitions. [2023-11-19 07:56:45,365 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 4698 transitions. Word has length 50 [2023-11-19 07:56:45,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:45,366 INFO L495 AbstractCegarLoop]: Abstraction has 2874 states and 4698 transitions. [2023-11-19 07:56:45,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 4698 transitions. [2023-11-19 07:56:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 07:56:45,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:45,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:45,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:56:45,368 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:45,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:45,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1523853909, now seen corresponding path program 1 times [2023-11-19 07:56:45,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:45,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83639257] [2023-11-19 07:56:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:45,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:56:45,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:45,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83639257] [2023-11-19 07:56:45,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83639257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:45,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:45,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:56:45,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402876651] [2023-11-19 07:56:45,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:45,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:56:45,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:45,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:56:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:45,552 INFO L87 Difference]: Start difference. First operand 2874 states and 4698 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:45,851 INFO L93 Difference]: Finished difference Result 8524 states and 12655 transitions. [2023-11-19 07:56:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-19 07:56:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:45,885 INFO L225 Difference]: With dead ends: 8524 [2023-11-19 07:56:45,885 INFO L226 Difference]: Without dead ends: 7186 [2023-11-19 07:56:45,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:56:45,890 INFO L413 NwaCegarLoop]: 1582 mSDtfsCounter, 4663 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4663 SdHoareTripleChecker+Valid, 3368 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:45,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4663 Valid, 3368 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:56:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7186 states. [2023-11-19 07:56:46,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7186 to 4210. [2023-11-19 07:56:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4210 states, 4208 states have (on average 1.5594106463878328) internal successors, (6562), 4209 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 6562 transitions. [2023-11-19 07:56:46,148 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 6562 transitions. Word has length 65 [2023-11-19 07:56:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:46,149 INFO L495 AbstractCegarLoop]: Abstraction has 4210 states and 6562 transitions. [2023-11-19 07:56:46,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:46,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 6562 transitions. [2023-11-19 07:56:46,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 07:56:46,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:46,152 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:46,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:56:46,152 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:46,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:46,153 INFO L85 PathProgramCache]: Analyzing trace with hash 555644587, now seen corresponding path program 1 times [2023-11-19 07:56:46,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:46,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012046410] [2023-11-19 07:56:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:46,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:56:46,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:46,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012046410] [2023-11-19 07:56:46,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012046410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:46,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:46,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:56:46,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178473425] [2023-11-19 07:56:46,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:46,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:56:46,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:46,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:56:46,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:46,326 INFO L87 Difference]: Start difference. First operand 4210 states and 6562 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:46,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:46,649 INFO L93 Difference]: Finished difference Result 9860 states and 14519 transitions. [2023-11-19 07:56:46,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:46,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-19 07:56:46,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:46,668 INFO L225 Difference]: With dead ends: 9860 [2023-11-19 07:56:46,668 INFO L226 Difference]: Without dead ends: 8522 [2023-11-19 07:56:46,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:56:46,673 INFO L413 NwaCegarLoop]: 1579 mSDtfsCounter, 4692 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4692 SdHoareTripleChecker+Valid, 3303 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:46,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4692 Valid, 3303 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:56:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8522 states. [2023-11-19 07:56:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8522 to 6218. [2023-11-19 07:56:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6218 states, 6216 states have (on average 1.5022522522522523) internal successors, (9338), 6217 states have internal predecessors, (9338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6218 states to 6218 states and 9338 transitions. [2023-11-19 07:56:46,941 INFO L78 Accepts]: Start accepts. Automaton has 6218 states and 9338 transitions. Word has length 65 [2023-11-19 07:56:46,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:46,941 INFO L495 AbstractCegarLoop]: Abstraction has 6218 states and 9338 transitions. [2023-11-19 07:56:46,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6218 states and 9338 transitions. [2023-11-19 07:56:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 07:56:46,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:46,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:46,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:56:46,944 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:46,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:46,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1958389845, now seen corresponding path program 1 times [2023-11-19 07:56:46,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:46,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233528041] [2023-11-19 07:56:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:46,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:56:47,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:47,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233528041] [2023-11-19 07:56:47,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233528041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:47,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:47,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:56:47,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172313259] [2023-11-19 07:56:47,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:47,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:56:47,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:47,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:56:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:47,075 INFO L87 Difference]: Start difference. First operand 6218 states and 9338 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:47,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:47,507 INFO L93 Difference]: Finished difference Result 11196 states and 16383 transitions. [2023-11-19 07:56:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:47,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-19 07:56:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:47,527 INFO L225 Difference]: With dead ends: 11196 [2023-11-19 07:56:47,527 INFO L226 Difference]: Without dead ends: 9858 [2023-11-19 07:56:47,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:56:47,532 INFO L413 NwaCegarLoop]: 1581 mSDtfsCounter, 4673 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4673 SdHoareTripleChecker+Valid, 3337 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:47,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4673 Valid, 3337 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:56:47,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9858 states. [2023-11-19 07:56:47,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9858 to 7554. [2023-11-19 07:56:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7554 states, 7552 states have (on average 1.4833156779661016) internal successors, (11202), 7553 states have internal predecessors, (11202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7554 states to 7554 states and 11202 transitions. [2023-11-19 07:56:47,851 INFO L78 Accepts]: Start accepts. Automaton has 7554 states and 11202 transitions. Word has length 65 [2023-11-19 07:56:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:47,851 INFO L495 AbstractCegarLoop]: Abstraction has 7554 states and 11202 transitions. [2023-11-19 07:56:47,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 7554 states and 11202 transitions. [2023-11-19 07:56:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 07:56:47,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:47,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:47,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:56:47,857 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:47,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:47,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1188964029, now seen corresponding path program 1 times [2023-11-19 07:56:47,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:47,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092107519] [2023-11-19 07:56:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:47,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:47,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:47,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092107519] [2023-11-19 07:56:47,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092107519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:47,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:47,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:56:47,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973044174] [2023-11-19 07:56:47,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:47,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:47,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:47,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:47,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:47,967 INFO L87 Difference]: Start difference. First operand 7554 states and 11202 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:48,145 INFO L93 Difference]: Finished difference Result 11896 states and 17343 transitions. [2023-11-19 07:56:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:48,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2023-11-19 07:56:48,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:48,157 INFO L225 Difference]: With dead ends: 11896 [2023-11-19 07:56:48,157 INFO L226 Difference]: Without dead ends: 5878 [2023-11-19 07:56:48,166 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 [2023-11-19 07:56:48,167 INFO L413 NwaCegarLoop]: 1560 mSDtfsCounter, 42 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3073 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 [2023-11-19 07:56:48,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3073 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2023-11-19 07:56:48,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 5876. [2023-11-19 07:56:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5876 states, 5874 states have (on average 1.5110657133129044) internal successors, (8876), 5875 states have internal predecessors, (8876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5876 states to 5876 states and 8876 transitions. [2023-11-19 07:56:48,440 INFO L78 Accepts]: Start accepts. Automaton has 5876 states and 8876 transitions. Word has length 67 [2023-11-19 07:56:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:48,440 INFO L495 AbstractCegarLoop]: Abstraction has 5876 states and 8876 transitions. [2023-11-19 07:56:48,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 5876 states and 8876 transitions. [2023-11-19 07:56:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 07:56:48,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:48,443 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:48,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:56:48,443 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:48,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash -733131994, now seen corresponding path program 1 times [2023-11-19 07:56:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:48,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062796228] [2023-11-19 07:56:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:48,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:56:48,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:48,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062796228] [2023-11-19 07:56:48,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062796228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:48,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:48,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:56:48,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487773712] [2023-11-19 07:56:48,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:48,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:56:48,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:48,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:56:48,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:48,620 INFO L87 Difference]: Start difference. First operand 5876 states and 8876 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:48,945 INFO L93 Difference]: Finished difference Result 9726 states and 14321 transitions. [2023-11-19 07:56:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:48,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-19 07:56:48,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:48,963 INFO L225 Difference]: With dead ends: 9726 [2023-11-19 07:56:48,964 INFO L226 Difference]: Without dead ends: 8764 [2023-11-19 07:56:48,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:56:48,969 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 4667 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4667 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:48,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4667 Valid, 3393 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:56:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2023-11-19 07:56:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 6836. [2023-11-19 07:56:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6834 states have (on average 1.495463857184665) internal successors, (10220), 6835 states have internal predecessors, (10220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 10220 transitions. [2023-11-19 07:56:49,253 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 10220 transitions. Word has length 67 [2023-11-19 07:56:49,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:49,254 INFO L495 AbstractCegarLoop]: Abstraction has 6836 states and 10220 transitions. [2023-11-19 07:56:49,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 10220 transitions. [2023-11-19 07:56:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 07:56:49,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:49,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:49,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:56:49,257 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:49,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash 548136257, now seen corresponding path program 1 times [2023-11-19 07:56:49,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:49,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941736224] [2023-11-19 07:56:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:49,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:49,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:49,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941736224] [2023-11-19 07:56:49,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941736224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:49,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:49,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:56:49,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92261143] [2023-11-19 07:56:49,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:49,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:49,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:49,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:49,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:49,412 INFO L87 Difference]: Start difference. First operand 6836 states and 10220 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:49,669 INFO L93 Difference]: Finished difference Result 9480 states and 13918 transitions. [2023-11-19 07:56:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:49,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-19 07:56:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:49,679 INFO L225 Difference]: With dead ends: 9480 [2023-11-19 07:56:49,680 INFO L226 Difference]: Without dead ends: 4198 [2023-11-19 07:56:49,686 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 [2023-11-19 07:56:49,687 INFO L413 NwaCegarLoop]: 1553 mSDtfsCounter, 37 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3058 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 [2023-11-19 07:56:49,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3058 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2023-11-19 07:56:49,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 4196. [2023-11-19 07:56:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4196 states, 4194 states have (on average 1.5450643776824033) internal successors, (6480), 4195 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4196 states to 4196 states and 6480 transitions. [2023-11-19 07:56:49,880 INFO L78 Accepts]: Start accepts. Automaton has 4196 states and 6480 transitions. Word has length 68 [2023-11-19 07:56:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:49,880 INFO L495 AbstractCegarLoop]: Abstraction has 4196 states and 6480 transitions. [2023-11-19 07:56:49,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 4196 states and 6480 transitions. [2023-11-19 07:56:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 07:56:49,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:49,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:49,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 07:56:49,883 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:49,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:49,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1967598547, now seen corresponding path program 1 times [2023-11-19 07:56:49,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:49,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436843642] [2023-11-19 07:56:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:49,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:50,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:50,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436843642] [2023-11-19 07:56:50,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436843642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:50,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:50,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:56:50,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091979285] [2023-11-19 07:56:50,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:50,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:50,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:50,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:50,041 INFO L87 Difference]: Start difference. First operand 4196 states and 6480 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:50,132 INFO L93 Difference]: Finished difference Result 5520 states and 8308 transitions. [2023-11-19 07:56:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:50,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-19 07:56:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:50,139 INFO L225 Difference]: With dead ends: 5520 [2023-11-19 07:56:50,139 INFO L226 Difference]: Without dead ends: 2878 [2023-11-19 07:56:50,143 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 [2023-11-19 07:56:50,143 INFO L413 NwaCegarLoop]: 1546 mSDtfsCounter, 34 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3043 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 [2023-11-19 07:56:50,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3043 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2023-11-19 07:56:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2876. [2023-11-19 07:56:50,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2874 states have (on average 1.6116910229645094) internal successors, (4632), 2875 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 4632 transitions. [2023-11-19 07:56:50,242 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 4632 transitions. Word has length 70 [2023-11-19 07:56:50,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:50,243 INFO L495 AbstractCegarLoop]: Abstraction has 2876 states and 4632 transitions. [2023-11-19 07:56:50,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 4632 transitions. [2023-11-19 07:56:50,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-19 07:56:50,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:50,245 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:50,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 07:56:50,245 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:50,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:50,246 INFO L85 PathProgramCache]: Analyzing trace with hash -673918747, now seen corresponding path program 1 times [2023-11-19 07:56:50,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:50,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43412606] [2023-11-19 07:56:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:50,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:50,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:50,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43412606] [2023-11-19 07:56:50,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43412606] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:50,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:50,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:56:50,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235396261] [2023-11-19 07:56:50,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:50,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:56:50,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:50,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:56:50,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:56:50,369 INFO L87 Difference]: Start difference. First operand 2876 states and 4632 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:50,421 INFO L93 Difference]: Finished difference Result 3540 states and 5536 transitions. [2023-11-19 07:56:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:56:50,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-11-19 07:56:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:50,426 INFO L225 Difference]: With dead ends: 3540 [2023-11-19 07:56:50,426 INFO L226 Difference]: Without dead ends: 2218 [2023-11-19 07:56:50,428 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 [2023-11-19 07:56:50,429 INFO L413 NwaCegarLoop]: 1539 mSDtfsCounter, 31 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3028 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 [2023-11-19 07:56:50,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3028 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:50,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2023-11-19 07:56:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2216. [2023-11-19 07:56:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2214 states have (on average 1.679765130984643) internal successors, (3719), 2215 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 3719 transitions. [2023-11-19 07:56:50,493 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 3719 transitions. Word has length 72 [2023-11-19 07:56:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:50,494 INFO L495 AbstractCegarLoop]: Abstraction has 2216 states and 3719 transitions. [2023-11-19 07:56:50,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 3719 transitions. [2023-11-19 07:56:50,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-19 07:56:50,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:50,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:50,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-19 07:56:50,496 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:50,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1516893303, now seen corresponding path program 1 times [2023-11-19 07:56:50,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:50,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582846349] [2023-11-19 07:56:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:52,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:52,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582846349] [2023-11-19 07:56:52,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582846349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:52,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727056672] [2023-11-19 07:56:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:52,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:52,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:52,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:52,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:56:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:53,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:56:53,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:53,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:55,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727056672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:55,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:55,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-11-19 07:56:55,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336090006] [2023-11-19 07:56:55,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:55,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-19 07:56:55,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-19 07:56:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2023-11-19 07:56:55,200 INFO L87 Difference]: Start difference. First operand 2216 states and 3719 transitions. Second operand has 29 states, 29 states have (on average 6.551724137931035) internal successors, (190), 28 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) [2023-11-19 07:56:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:56,866 INFO L93 Difference]: Finished difference Result 5200 states and 7708 transitions. [2023-11-19 07:56:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 07:56:56,866 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.551724137931035) internal successors, (190), 28 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 74 [2023-11-19 07:56:56,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:56,875 INFO L225 Difference]: With dead ends: 5200 [2023-11-19 07:56:56,875 INFO L226 Difference]: Without dead ends: 4538 [2023-11-19 07:56:56,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=615, Invalid=2465, Unknown=0, NotChecked=0, Total=3080 [2023-11-19 07:56:56,880 INFO L413 NwaCegarLoop]: 1503 mSDtfsCounter, 22309 mSDsluCounter, 7807 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22309 SdHoareTripleChecker+Valid, 9310 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:56,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22309 Valid, 9310 Invalid, 688 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [43 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:56:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2023-11-19 07:56:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 4416. [2023-11-19 07:56:57,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4416 states, 4414 states have (on average 1.5079293158133213) internal successors, (6656), 4415 states have internal predecessors, (6656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:56:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4416 states to 4416 states and 6656 transitions. [2023-11-19 07:56:57,065 INFO L78 Accepts]: Start accepts. Automaton has 4416 states and 6656 transitions. Word has length 74 [2023-11-19 07:56:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:57,066 INFO L495 AbstractCegarLoop]: Abstraction has 4416 states and 6656 transitions. [2023-11-19 07:56:57,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.551724137931035) internal successors, (190), 28 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) [2023-11-19 07:56:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 4416 states and 6656 transitions. [2023-11-19 07:56:57,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-19 07:56:57,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:57,069 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:57,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:57,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:57,291 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:57,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:57,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1483179432, now seen corresponding path program 1 times [2023-11-19 07:56:57,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:57,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376798542] [2023-11-19 07:56:57,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:57,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:56:58,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:58,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376798542] [2023-11-19 07:56:58,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376798542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:58,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402087268] [2023-11-19 07:56:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:58,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:58,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:58,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:58,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:56:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:58,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:56:58,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:56:58,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:56:58,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402087268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:58,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:56:58,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 4] total 18 [2023-11-19 07:56:58,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581493212] [2023-11-19 07:56:58,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:58,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:56:58,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:58,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:56:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:56:58,734 INFO L87 Difference]: Start difference. First operand 4416 states and 6656 transitions. Second operand has 18 states, 18 states have (on average 11.555555555555555) internal successors, (208), 18 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:01,537 INFO L93 Difference]: Finished difference Result 22759 states and 30532 transitions. [2023-11-19 07:57:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-19 07:57:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 11.555555555555555) internal successors, (208), 18 states have internal predecessors, (208), 0 states have call successors, (0), 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 75 [2023-11-19 07:57:01,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:01,583 INFO L225 Difference]: With dead ends: 22759 [2023-11-19 07:57:01,584 INFO L226 Difference]: Without dead ends: 19897 [2023-11-19 07:57:01,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=730, Invalid=3176, Unknown=0, NotChecked=0, Total=3906 [2023-11-19 07:57:01,593 INFO L413 NwaCegarLoop]: 1514 mSDtfsCounter, 11476 mSDsluCounter, 7766 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11476 SdHoareTripleChecker+Valid, 9280 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:01,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11476 Valid, 9280 Invalid, 703 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [38 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:57:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19897 states. [2023-11-19 07:57:02,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19897 to 18869. [2023-11-19 07:57:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18869 states, 18867 states have (on average 1.302803837388032) internal successors, (24580), 18868 states have internal predecessors, (24580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18869 states to 18869 states and 24580 transitions. [2023-11-19 07:57:02,628 INFO L78 Accepts]: Start accepts. Automaton has 18869 states and 24580 transitions. Word has length 75 [2023-11-19 07:57:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:02,628 INFO L495 AbstractCegarLoop]: Abstraction has 18869 states and 24580 transitions. [2023-11-19 07:57:02,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.555555555555555) internal successors, (208), 18 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 18869 states and 24580 transitions. [2023-11-19 07:57:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-19 07:57:02,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:02,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:02,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:02,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-19 07:57:02,852 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:02,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:02,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1549216774, now seen corresponding path program 1 times [2023-11-19 07:57:02,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:02,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851208738] [2023-11-19 07:57:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:02,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:06,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:06,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851208738] [2023-11-19 07:57:06,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851208738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:06,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449168281] [2023-11-19 07:57:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:06,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:06,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:06,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:06,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4825c48b-af03-4ffb-a747-946d138ce747/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:57:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:06,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 07:57:06,429 INFO L285 TraceCheckSpWp]: Computing forward predicates...