./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7b106c16f890b4f1f31bdf98bba3b1882ec8a4b626832b9e3b2f13954dceb627 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:36:31,449 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:36:31,514 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:36:31,518 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:36:31,519 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:36:31,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:36:31,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:36:31,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:36:31,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:36:31,547 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:36:31,548 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:36:31,548 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:36:31,549 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:36:31,550 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:36:31,550 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:36:31,551 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:36:31,551 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:36:31,552 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:36:31,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:36:31,553 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:36:31,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:36:31,559 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:36:31,559 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:36:31,560 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:36:31,560 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:36:31,560 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:36:31,561 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:36:31,561 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:36:31,562 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:36:31,562 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:36:31,562 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:36:31,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:36:31,563 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:36:31,563 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:36:31,564 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:36:31,564 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:36:31,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:36:31,565 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:36:31,565 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:36:31,565 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:36:31,566 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:36:31,567 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:36:31,568 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_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b106c16f890b4f1f31bdf98bba3b1882ec8a4b626832b9e3b2f13954dceb627 [2023-11-28 23:36:31,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:36:31,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:36:31,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:36:31,813 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:36:31,813 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:36:31,814 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2023-11-28 23:36:34,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:36:35,063 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:36:35,063 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2023-11-28 23:36:35,094 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/data/b474c9137/a2dac15a84f147479d6810996e959022/FLAG4d78dfa6b [2023-11-28 23:36:35,109 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/data/b474c9137/a2dac15a84f147479d6810996e959022 [2023-11-28 23:36:35,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:36:35,113 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:36:35,114 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:36:35,114 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:36:35,119 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:36:35,120 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:36:35" (1/1) ... [2023-11-28 23:36:35,121 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57e2a671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:35, skipping insertion in model container [2023-11-28 23:36:35,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:36:35" (1/1) ... [2023-11-28 23:36:35,250 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:36:35,581 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_9b70bed8-a490-428f-9cfa-b238539cad50/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label01.c[15547,15560] [2023-11-28 23:36:35,655 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_9b70bed8-a490-428f-9cfa-b238539cad50/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label01.c[21102,21115] [2023-11-28 23:36:36,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:36:36,366 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:36:36,401 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_9b70bed8-a490-428f-9cfa-b238539cad50/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label01.c[15547,15560] [2023-11-28 23:36:36,413 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_9b70bed8-a490-428f-9cfa-b238539cad50/sv-benchmarks/c/combinations/pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label01.c[21102,21115] [2023-11-28 23:36:36,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:36:36,982 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:36:36,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36 WrapperNode [2023-11-28 23:36:36,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:36:36,983 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:36:36,984 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:36:36,984 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:36:36,991 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (1/1) ... [2023-11-28 23:36:37,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (1/1) ... [2023-11-28 23:36:37,333 INFO L138 Inliner]: procedures = 38, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5151 [2023-11-28 23:36:37,333 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:36:37,334 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:36:37,334 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:36:37,334 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:36:37,345 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (1/1) ... [2023-11-28 23:36:37,345 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (1/1) ... [2023-11-28 23:36:37,459 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (1/1) ... [2023-11-28 23:36:37,601 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-28 23:36:37,601 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (1/1) ... [2023-11-28 23:36:37,601 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (1/1) ... [2023-11-28 23:36:37,769 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (1/1) ... [2023-11-28 23:36:37,826 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (1/1) ... [2023-11-28 23:36:37,862 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (1/1) ... [2023-11-28 23:36:37,879 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (1/1) ... [2023-11-28 23:36:37,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:36:37,962 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:36:37,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:36:37,962 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:36:37,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (1/1) ... [2023-11-28 23:36:37,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:36:37,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:36:37,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:36:37,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:36:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:36:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:36:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:36:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:36:38,127 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:36:38,129 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:36:42,641 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:36:42,702 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:36:42,702 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-28 23:36:42,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:36:42 BoogieIcfgContainer [2023-11-28 23:36:42,704 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:36:42,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:36:42,706 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:36:42,708 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:36:42,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:36:35" (1/3) ... [2023-11-28 23:36:42,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25050da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:36:42, skipping insertion in model container [2023-11-28 23:36:42,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:36:36" (2/3) ... [2023-11-28 23:36:42,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25050da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:36:42, skipping insertion in model container [2023-11-28 23:36:42,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:36:42" (3/3) ... [2023-11-28 23:36:42,711 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2023-11-28 23:36:42,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:36:42,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-28 23:36:42,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:36:42,797 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;@3b4c3176, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:36:42,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-28 23:36:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 851 states, 848 states have (on average 1.9728773584905661) internal successors, (1673), 850 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:42,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-28 23:36:42,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:42,815 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] [2023-11-28 23:36:42,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:42,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:42,820 INFO L85 PathProgramCache]: Analyzing trace with hash -150309200, now seen corresponding path program 1 times [2023-11-28 23:36:42,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:42,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981222464] [2023-11-28 23:36:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:42,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:43,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:43,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981222464] [2023-11-28 23:36:43,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981222464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:43,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:43,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:36:43,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972475899] [2023-11-28 23:36:43,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:43,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 23:36:43,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:43,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 23:36:43,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:36:43,101 INFO L87 Difference]: Start difference. First operand has 851 states, 848 states have (on average 1.9728773584905661) internal successors, (1673), 850 states have internal predecessors, (1673), 0 states have call successors, (0), 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 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:43,193 INFO L93 Difference]: Finished difference Result 1657 states and 3259 transitions. [2023-11-28 23:36:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 23:36:43,196 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2023-11-28 23:36:43,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:43,215 INFO L225 Difference]: With dead ends: 1657 [2023-11-28 23:36:43,215 INFO L226 Difference]: Without dead ends: 847 [2023-11-28 23:36:43,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:36:43,225 INFO L413 NwaCegarLoop]: 1601 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:43,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1601 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:36:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2023-11-28 23:36:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2023-11-28 23:36:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 845 states have (on average 1.8958579881656805) internal successors, (1602), 846 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1602 transitions. [2023-11-28 23:36:43,311 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1602 transitions. Word has length 23 [2023-11-28 23:36:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:43,311 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1602 transitions. [2023-11-28 23:36:43,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1602 transitions. [2023-11-28 23:36:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-28 23:36:43,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:43,313 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] [2023-11-28 23:36:43,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:36:43,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:43,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:43,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1839252942, now seen corresponding path program 1 times [2023-11-28 23:36:43,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:43,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287671453] [2023-11-28 23:36:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:43,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:43,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:43,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287671453] [2023-11-28 23:36:43,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287671453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:43,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:43,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:36:43,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473421287] [2023-11-28 23:36:43,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:43,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:36:43,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:43,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:36:43,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:36:43,623 INFO L87 Difference]: Start difference. First operand 847 states and 1602 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:43,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:43,728 INFO L93 Difference]: Finished difference Result 899 states and 1684 transitions. [2023-11-28 23:36:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:36:43,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2023-11-28 23:36:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:43,734 INFO L225 Difference]: With dead ends: 899 [2023-11-28 23:36:43,735 INFO L226 Difference]: Without dead ends: 847 [2023-11-28 23:36:43,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:36:43,737 INFO L413 NwaCegarLoop]: 1599 mSDtfsCounter, 0 mSDsluCounter, 3154 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4753 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:43,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4753 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:36:43,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2023-11-28 23:36:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2023-11-28 23:36:43,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 845 states have (on average 1.8485207100591716) internal successors, (1562), 846 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1562 transitions. [2023-11-28 23:36:43,765 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1562 transitions. Word has length 23 [2023-11-28 23:36:43,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:43,765 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1562 transitions. [2023-11-28 23:36:43,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1562 transitions. [2023-11-28 23:36:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-28 23:36:43,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:43,768 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] [2023-11-28 23:36:43,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:36:43,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:43,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:43,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1370291631, now seen corresponding path program 1 times [2023-11-28 23:36:43,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:43,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959931521] [2023-11-28 23:36:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:43,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:43,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:43,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959931521] [2023-11-28 23:36:43,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959931521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:43,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:43,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:36:43,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956864912] [2023-11-28 23:36:43,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:43,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:36:43,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:43,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:36:43,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:43,876 INFO L87 Difference]: Start difference. First operand 847 states and 1562 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 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) [2023-11-28 23:36:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:47,636 INFO L93 Difference]: Finished difference Result 2351 states and 4435 transitions. [2023-11-28 23:36:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:36:47,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 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 [2023-11-28 23:36:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:47,647 INFO L225 Difference]: With dead ends: 2351 [2023-11-28 23:36:47,648 INFO L226 Difference]: Without dead ends: 1598 [2023-11-28 23:36:47,649 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 [2023-11-28 23:36:47,651 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 894 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 2868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:47,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 548 Invalid, 2868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-28 23:36:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2023-11-28 23:36:47,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1598. [2023-11-28 23:36:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1596 states have (on average 1.6221804511278195) internal successors, (2589), 1597 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:47,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 2589 transitions. [2023-11-28 23:36:47,698 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 2589 transitions. Word has length 47 [2023-11-28 23:36:47,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:47,699 INFO L495 AbstractCegarLoop]: Abstraction has 1598 states and 2589 transitions. [2023-11-28 23:36:47,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 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) [2023-11-28 23:36:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 2589 transitions. [2023-11-28 23:36:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-28 23:36:47,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:47,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:47,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:36:47,703 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:47,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash -138573370, now seen corresponding path program 1 times [2023-11-28 23:36:47,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:47,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329065889] [2023-11-28 23:36:47,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:47,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:47,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329065889] [2023-11-28 23:36:47,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329065889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:47,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:47,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:36:47,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817716076] [2023-11-28 23:36:47,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:47,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:36:47,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:36:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:36:47,915 INFO L87 Difference]: Start difference. First operand 1598 states and 2589 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:48,327 INFO L93 Difference]: Finished difference Result 2186 states and 3537 transitions. [2023-11-28 23:36:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 23:36:48,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-28 23:36:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:48,342 INFO L225 Difference]: With dead ends: 2186 [2023-11-28 23:36:48,342 INFO L226 Difference]: Without dead ends: 2137 [2023-11-28 23:36:48,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-11-28 23:36:48,345 INFO L413 NwaCegarLoop]: 1553 mSDtfsCounter, 9829 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9829 SdHoareTripleChecker+Valid, 3039 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:48,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9829 Valid, 3039 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:36:48,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2023-11-28 23:36:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1645. [2023-11-28 23:36:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1643 states have (on average 1.6220328667072428) internal successors, (2665), 1644 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2665 transitions. [2023-11-28 23:36:48,411 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2665 transitions. Word has length 62 [2023-11-28 23:36:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:48,412 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 2665 transitions. [2023-11-28 23:36:48,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2665 transitions. [2023-11-28 23:36:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-28 23:36:48,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:48,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:48,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 23:36:48,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:48,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:48,416 INFO L85 PathProgramCache]: Analyzing trace with hash -157853578, now seen corresponding path program 1 times [2023-11-28 23:36:48,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:48,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107738491] [2023-11-28 23:36:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:48,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:48,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:48,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107738491] [2023-11-28 23:36:48,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107738491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:48,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:48,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:36:48,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352652352] [2023-11-28 23:36:48,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:48,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:36:48,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:48,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:36:48,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:48,533 INFO L87 Difference]: Start difference. First operand 1645 states and 2665 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:48,587 INFO L93 Difference]: Finished difference Result 1826 states and 2956 transitions. [2023-11-28 23:36:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:36:48,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-28 23:36:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:48,598 INFO L225 Difference]: With dead ends: 1826 [2023-11-28 23:36:48,598 INFO L226 Difference]: Without dead ends: 1730 [2023-11-28 23:36:48,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:48,601 INFO L413 NwaCegarLoop]: 1555 mSDtfsCounter, 1490 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:48,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1490 Valid, 1626 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:36:48,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2023-11-28 23:36:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1726. [2023-11-28 23:36:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1724 states have (on average 1.6200696055684454) internal successors, (2793), 1725 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2793 transitions. [2023-11-28 23:36:48,662 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2793 transitions. Word has length 64 [2023-11-28 23:36:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:48,663 INFO L495 AbstractCegarLoop]: Abstraction has 1726 states and 2793 transitions. [2023-11-28 23:36:48,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2793 transitions. [2023-11-28 23:36:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-28 23:36:48,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:48,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:48,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 23:36:48,666 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:48,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash -155708626, now seen corresponding path program 1 times [2023-11-28 23:36:48,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:48,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005611172] [2023-11-28 23:36:48,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:48,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:49,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:49,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005611172] [2023-11-28 23:36:49,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005611172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:49,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:49,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:36:49,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263410790] [2023-11-28 23:36:49,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:49,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:36:49,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:49,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:36:49,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:36:49,054 INFO L87 Difference]: Start difference. First operand 1726 states and 2793 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:49,379 INFO L93 Difference]: Finished difference Result 1905 states and 3077 transitions. [2023-11-28 23:36:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:36:49,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-28 23:36:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:49,391 INFO L225 Difference]: With dead ends: 1905 [2023-11-28 23:36:49,391 INFO L226 Difference]: Without dead ends: 1728 [2023-11-28 23:36:49,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-28 23:36:49,393 INFO L413 NwaCegarLoop]: 1551 mSDtfsCounter, 8998 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8998 SdHoareTripleChecker+Valid, 1924 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:49,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8998 Valid, 1924 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:36:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2023-11-28 23:36:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1726. [2023-11-28 23:36:49,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1724 states have (on average 1.618909512761021) internal successors, (2791), 1725 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2791 transitions. [2023-11-28 23:36:49,444 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2791 transitions. Word has length 64 [2023-11-28 23:36:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:49,445 INFO L495 AbstractCegarLoop]: Abstraction has 1726 states and 2791 transitions. [2023-11-28 23:36:49,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2791 transitions. [2023-11-28 23:36:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-28 23:36:49,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:49,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:49,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 23:36:49,446 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:49,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:49,447 INFO L85 PathProgramCache]: Analyzing trace with hash -660671842, now seen corresponding path program 1 times [2023-11-28 23:36:49,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:49,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72674483] [2023-11-28 23:36:49,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:49,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:49,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:49,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72674483] [2023-11-28 23:36:49,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72674483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:49,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:49,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:36:49,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43934558] [2023-11-28 23:36:49,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:49,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:36:49,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:49,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:36:49,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:36:49,647 INFO L87 Difference]: Start difference. First operand 1726 states and 2791 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:49,734 INFO L93 Difference]: Finished difference Result 1734 states and 2800 transitions. [2023-11-28 23:36:49,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:36:49,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-28 23:36:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:49,744 INFO L225 Difference]: With dead ends: 1734 [2023-11-28 23:36:49,745 INFO L226 Difference]: Without dead ends: 1732 [2023-11-28 23:36:49,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:36:49,746 INFO L413 NwaCegarLoop]: 1558 mSDtfsCounter, 1 mSDsluCounter, 3108 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4666 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:49,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4666 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:36:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2023-11-28 23:36:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1730. [2023-11-28 23:36:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1728 states have (on average 1.6168981481481481) internal successors, (2794), 1729 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2794 transitions. [2023-11-28 23:36:49,794 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2794 transitions. Word has length 65 [2023-11-28 23:36:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:49,795 INFO L495 AbstractCegarLoop]: Abstraction has 1730 states and 2794 transitions. [2023-11-28 23:36:49,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:49,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2794 transitions. [2023-11-28 23:36:49,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-28 23:36:49,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:49,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:49,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 23:36:49,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:49,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:49,798 INFO L85 PathProgramCache]: Analyzing trace with hash -347652018, now seen corresponding path program 1 times [2023-11-28 23:36:49,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:49,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163034786] [2023-11-28 23:36:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:49,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:49,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163034786] [2023-11-28 23:36:49,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163034786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:49,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:49,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:36:49,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206472007] [2023-11-28 23:36:49,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:49,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:36:49,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:49,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:36:49,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:49,861 INFO L87 Difference]: Start difference. First operand 1730 states and 2794 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:49,899 INFO L93 Difference]: Finished difference Result 2076 states and 3334 transitions. [2023-11-28 23:36:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:36:49,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-28 23:36:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:49,910 INFO L225 Difference]: With dead ends: 2076 [2023-11-28 23:36:49,910 INFO L226 Difference]: Without dead ends: 1895 [2023-11-28 23:36:49,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:49,912 INFO L413 NwaCegarLoop]: 1604 mSDtfsCounter, 1503 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:49,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1503 Valid, 1691 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:36:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2023-11-28 23:36:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1893. [2023-11-28 23:36:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1891 states have (on average 1.6102591221575886) internal successors, (3045), 1892 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3045 transitions. [2023-11-28 23:36:49,966 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3045 transitions. Word has length 66 [2023-11-28 23:36:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:49,966 INFO L495 AbstractCegarLoop]: Abstraction has 1893 states and 3045 transitions. [2023-11-28 23:36:49,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3045 transitions. [2023-11-28 23:36:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-28 23:36:49,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:49,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:49,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 23:36:49,968 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:49,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:49,969 INFO L85 PathProgramCache]: Analyzing trace with hash -307708082, now seen corresponding path program 1 times [2023-11-28 23:36:49,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:49,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228766842] [2023-11-28 23:36:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:49,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:50,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:50,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228766842] [2023-11-28 23:36:50,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228766842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:50,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:50,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:36:50,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383978828] [2023-11-28 23:36:50,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:50,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:36:50,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:50,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:36:50,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:50,019 INFO L87 Difference]: Start difference. First operand 1893 states and 3045 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:50,056 INFO L93 Difference]: Finished difference Result 2549 states and 4059 transitions. [2023-11-28 23:36:50,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:36:50,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-28 23:36:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:50,068 INFO L225 Difference]: With dead ends: 2549 [2023-11-28 23:36:50,068 INFO L226 Difference]: Without dead ends: 2205 [2023-11-28 23:36:50,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:50,070 INFO L413 NwaCegarLoop]: 1602 mSDtfsCounter, 1501 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:50,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1501 Valid, 1693 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:36:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2023-11-28 23:36:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2203. [2023-11-28 23:36:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2201 states have (on average 1.5970013630168105) internal successors, (3515), 2202 states have internal predecessors, (3515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:50,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 3515 transitions. [2023-11-28 23:36:50,115 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 3515 transitions. Word has length 66 [2023-11-28 23:36:50,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:50,116 INFO L495 AbstractCegarLoop]: Abstraction has 2203 states and 3515 transitions. [2023-11-28 23:36:50,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 3515 transitions. [2023-11-28 23:36:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-28 23:36:50,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:50,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:50,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 23:36:50,117 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:50,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:50,117 INFO L85 PathProgramCache]: Analyzing trace with hash -933364146, now seen corresponding path program 1 times [2023-11-28 23:36:50,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:50,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393278754] [2023-11-28 23:36:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:50,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:50,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:50,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393278754] [2023-11-28 23:36:50,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393278754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:50,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:50,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:36:50,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230934221] [2023-11-28 23:36:50,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:50,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:36:50,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:50,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:36:50,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:50,162 INFO L87 Difference]: Start difference. First operand 2203 states and 3515 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:50,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:50,209 INFO L93 Difference]: Finished difference Result 3447 states and 5413 transitions. [2023-11-28 23:36:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:36:50,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-28 23:36:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:50,221 INFO L225 Difference]: With dead ends: 3447 [2023-11-28 23:36:50,222 INFO L226 Difference]: Without dead ends: 2793 [2023-11-28 23:36:50,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:50,224 INFO L413 NwaCegarLoop]: 1600 mSDtfsCounter, 1499 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:50,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1499 Valid, 1695 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:36:50,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2793 states. [2023-11-28 23:36:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2793 to 2791. [2023-11-28 23:36:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2789 states have (on average 1.5743994263176766) internal successors, (4391), 2790 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 4391 transitions. [2023-11-28 23:36:50,285 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 4391 transitions. Word has length 66 [2023-11-28 23:36:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:50,285 INFO L495 AbstractCegarLoop]: Abstraction has 2791 states and 4391 transitions. [2023-11-28 23:36:50,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 4391 transitions. [2023-11-28 23:36:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-28 23:36:50,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:50,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:50,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 23:36:50,286 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:50,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:50,287 INFO L85 PathProgramCache]: Analyzing trace with hash -44630706, now seen corresponding path program 1 times [2023-11-28 23:36:50,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:50,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052967657] [2023-11-28 23:36:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:50,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:50,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:50,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052967657] [2023-11-28 23:36:50,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052967657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:50,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:50,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:36:50,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177585649] [2023-11-28 23:36:50,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:50,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:36:50,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:50,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:36:50,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:50,335 INFO L87 Difference]: Start difference. First operand 2791 states and 4391 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:50,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:50,398 INFO L93 Difference]: Finished difference Result 5147 states and 7929 transitions. [2023-11-28 23:36:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:36:50,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-28 23:36:50,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:50,413 INFO L225 Difference]: With dead ends: 5147 [2023-11-28 23:36:50,414 INFO L226 Difference]: Without dead ends: 3905 [2023-11-28 23:36:50,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:50,417 INFO L413 NwaCegarLoop]: 1598 mSDtfsCounter, 1497 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1497 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:50,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1497 Valid, 1697 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:36:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2023-11-28 23:36:50,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3903. [2023-11-28 23:36:50,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3901 states have (on average 1.5419123301717508) internal successors, (6015), 3902 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:50,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 6015 transitions. [2023-11-28 23:36:50,508 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 6015 transitions. Word has length 66 [2023-11-28 23:36:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:50,508 INFO L495 AbstractCegarLoop]: Abstraction has 3903 states and 6015 transitions. [2023-11-28 23:36:50,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:50,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 6015 transitions. [2023-11-28 23:36:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-28 23:36:50,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:50,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:50,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-28 23:36:50,510 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:50,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:50,510 INFO L85 PathProgramCache]: Analyzing trace with hash -79068850, now seen corresponding path program 1 times [2023-11-28 23:36:50,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:50,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483570415] [2023-11-28 23:36:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:50,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:50,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:50,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483570415] [2023-11-28 23:36:50,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483570415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:50,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:50,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:36:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992566630] [2023-11-28 23:36:50,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:50,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:36:50,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:36:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:50,555 INFO L87 Difference]: Start difference. First operand 3903 states and 6015 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:50,711 INFO L93 Difference]: Finished difference Result 8355 states and 12577 transitions. [2023-11-28 23:36:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:36:50,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-11-28 23:36:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:50,739 INFO L225 Difference]: With dead ends: 8355 [2023-11-28 23:36:50,739 INFO L226 Difference]: Without dead ends: 6001 [2023-11-28 23:36:50,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:50,743 INFO L413 NwaCegarLoop]: 1614 mSDtfsCounter, 1505 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:50,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1505 Valid, 1697 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:36:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2023-11-28 23:36:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 5999. [2023-11-28 23:36:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5999 states, 5997 states have (on average 1.5019176254794064) internal successors, (9007), 5998 states have internal predecessors, (9007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5999 states to 5999 states and 9007 transitions. [2023-11-28 23:36:50,965 INFO L78 Accepts]: Start accepts. Automaton has 5999 states and 9007 transitions. Word has length 66 [2023-11-28 23:36:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:50,966 INFO L495 AbstractCegarLoop]: Abstraction has 5999 states and 9007 transitions. [2023-11-28 23:36:50,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:50,966 INFO L276 IsEmpty]: Start isEmpty. Operand 5999 states and 9007 transitions. [2023-11-28 23:36:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-28 23:36:50,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:50,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:50,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-28 23:36:50,968 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:50,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:50,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1522611955, now seen corresponding path program 1 times [2023-11-28 23:36:50,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:50,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37381784] [2023-11-28 23:36:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:50,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:36:51,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:51,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37381784] [2023-11-28 23:36:51,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37381784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:51,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:51,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:36:51,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042782456] [2023-11-28 23:36:51,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:51,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:36:51,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:51,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:36:51,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:51,029 INFO L87 Difference]: Start difference. First operand 5999 states and 9007 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) [2023-11-28 23:36:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:51,211 INFO L93 Difference]: Finished difference Result 10614 states and 15861 transitions. [2023-11-28 23:36:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:36:51,212 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 [2023-11-28 23:36:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:51,229 INFO L225 Difference]: With dead ends: 10614 [2023-11-28 23:36:51,229 INFO L226 Difference]: Without dead ends: 8115 [2023-11-28 23:36:51,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:36:51,235 INFO L413 NwaCegarLoop]: 1619 mSDtfsCounter, 1504 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:51,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1504 Valid, 1698 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:36:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8115 states. [2023-11-28 23:36:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8115 to 8113. [2023-11-28 23:36:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8113 states, 8111 states have (on average 1.485513500184934) internal successors, (12049), 8112 states have internal predecessors, (12049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8113 states to 8113 states and 12049 transitions. [2023-11-28 23:36:51,506 INFO L78 Accepts]: Start accepts. Automaton has 8113 states and 12049 transitions. Word has length 68 [2023-11-28 23:36:51,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:51,507 INFO L495 AbstractCegarLoop]: Abstraction has 8113 states and 12049 transitions. [2023-11-28 23:36:51,507 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) [2023-11-28 23:36:51,508 INFO L276 IsEmpty]: Start isEmpty. Operand 8113 states and 12049 transitions. [2023-11-28 23:36:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-28 23:36:51,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:51,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:51,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-28 23:36:51,511 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:51,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:51,512 INFO L85 PathProgramCache]: Analyzing trace with hash 510998183, now seen corresponding path program 1 times [2023-11-28 23:36:51,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:51,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196688281] [2023-11-28 23:36:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:51,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 23:36:51,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:51,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196688281] [2023-11-28 23:36:51,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196688281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:51,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:51,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:36:51,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406470060] [2023-11-28 23:36:51,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:51,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:36:51,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:51,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:36:51,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:36:51,780 INFO L87 Difference]: Start difference. First operand 8113 states and 12049 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:52,855 INFO L93 Difference]: Finished difference Result 48831 states and 71160 transitions. [2023-11-28 23:36:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:36:52,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-11-28 23:36:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:52,951 INFO L225 Difference]: With dead ends: 48831 [2023-11-28 23:36:52,951 INFO L226 Difference]: Without dead ends: 42269 [2023-11-28 23:36:52,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:36:52,966 INFO L413 NwaCegarLoop]: 1634 mSDtfsCounter, 8086 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8086 SdHoareTripleChecker+Valid, 3866 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:52,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8086 Valid, 3866 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:36:53,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42269 states. [2023-11-28 23:36:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42269 to 14673. [2023-11-28 23:36:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14673 states, 14671 states have (on average 1.4647263308567924) internal successors, (21489), 14672 states have internal predecessors, (21489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14673 states to 14673 states and 21489 transitions. [2023-11-28 23:36:53,580 INFO L78 Accepts]: Start accepts. Automaton has 14673 states and 21489 transitions. Word has length 86 [2023-11-28 23:36:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:53,581 INFO L495 AbstractCegarLoop]: Abstraction has 14673 states and 21489 transitions. [2023-11-28 23:36:53,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 14673 states and 21489 transitions. [2023-11-28 23:36:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-28 23:36:53,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:53,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:53,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-28 23:36:53,584 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:53,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:53,584 INFO L85 PathProgramCache]: Analyzing trace with hash 550942119, now seen corresponding path program 1 times [2023-11-28 23:36:53,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:53,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208038044] [2023-11-28 23:36:53,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:53,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-28 23:36:53,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:53,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208038044] [2023-11-28 23:36:53,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208038044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:53,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:53,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:36:53,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104837180] [2023-11-28 23:36:53,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:53,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:36:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:53,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:36:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:36:53,818 INFO L87 Difference]: Start difference. First operand 14673 states and 21489 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:54,940 INFO L93 Difference]: Finished difference Result 55391 states and 80600 transitions. [2023-11-28 23:36:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:36:54,940 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-11-28 23:36:54,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:55,002 INFO L225 Difference]: With dead ends: 55391 [2023-11-28 23:36:55,002 INFO L226 Difference]: Without dead ends: 48829 [2023-11-28 23:36:55,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:36:55,015 INFO L413 NwaCegarLoop]: 1631 mSDtfsCounter, 8138 mSDsluCounter, 2135 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8138 SdHoareTripleChecker+Valid, 3766 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:55,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8138 Valid, 3766 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:36:55,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48829 states. [2023-11-28 23:36:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48829 to 24529. [2023-11-28 23:36:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24529 states, 24527 states have (on average 1.4501977412647287) internal successors, (35569), 24528 states have internal predecessors, (35569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24529 states to 24529 states and 35569 transitions. [2023-11-28 23:36:55,901 INFO L78 Accepts]: Start accepts. Automaton has 24529 states and 35569 transitions. Word has length 86 [2023-11-28 23:36:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:55,901 INFO L495 AbstractCegarLoop]: Abstraction has 24529 states and 35569 transitions. [2023-11-28 23:36:55,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 24529 states and 35569 transitions. [2023-11-28 23:36:55,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-28 23:36:55,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:55,904 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:55,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-28 23:36:55,904 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:55,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash -74713945, now seen corresponding path program 1 times [2023-11-28 23:36:55,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:55,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072748960] [2023-11-28 23:36:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:55,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:36:56,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:56,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072748960] [2023-11-28 23:36:56,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072748960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:56,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:56,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:36:56,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138235549] [2023-11-28 23:36:56,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:36:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:36:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:36:56,055 INFO L87 Difference]: Start difference. First operand 24529 states and 35569 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:57,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:36:57,400 INFO L93 Difference]: Finished difference Result 61951 states and 90040 transitions. [2023-11-28 23:36:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:36:57,401 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-11-28 23:36:57,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:36:57,448 INFO L225 Difference]: With dead ends: 61951 [2023-11-28 23:36:57,448 INFO L226 Difference]: Without dead ends: 55389 [2023-11-28 23:36:57,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:36:57,458 INFO L413 NwaCegarLoop]: 1628 mSDtfsCounter, 8187 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8187 SdHoareTripleChecker+Valid, 3768 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:36:57,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8187 Valid, 3768 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:36:57,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55389 states. [2023-11-28 23:36:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55389 to 31089. [2023-11-28 23:36:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31089 states, 31087 states have (on average 1.4478399330910026) internal successors, (45009), 31088 states have internal predecessors, (45009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31089 states to 31089 states and 45009 transitions. [2023-11-28 23:36:58,393 INFO L78 Accepts]: Start accepts. Automaton has 31089 states and 45009 transitions. Word has length 86 [2023-11-28 23:36:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:36:58,393 INFO L495 AbstractCegarLoop]: Abstraction has 31089 states and 45009 transitions. [2023-11-28 23:36:58,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:36:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 31089 states and 45009 transitions. [2023-11-28 23:36:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-28 23:36:58,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:36:58,396 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:36:58,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-28 23:36:58,397 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:36:58,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:36:58,397 INFO L85 PathProgramCache]: Analyzing trace with hash 814019495, now seen corresponding path program 1 times [2023-11-28 23:36:58,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:36:58,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341351945] [2023-11-28 23:36:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:36:58,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:36:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:36:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-28 23:36:58,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:36:58,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341351945] [2023-11-28 23:36:58,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341351945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:36:58,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:36:58,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:36:58,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741356053] [2023-11-28 23:36:58,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:36:58,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:36:58,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:36:58,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:36:58,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:36:58,603 INFO L87 Difference]: Start difference. First operand 31089 states and 45009 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:00,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:00,255 INFO L93 Difference]: Finished difference Result 68511 states and 99480 transitions. [2023-11-28 23:37:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:37:00,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-11-28 23:37:00,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:00,318 INFO L225 Difference]: With dead ends: 68511 [2023-11-28 23:37:00,319 INFO L226 Difference]: Without dead ends: 61949 [2023-11-28 23:37:00,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:37:00,331 INFO L413 NwaCegarLoop]: 1633 mSDtfsCounter, 8090 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8090 SdHoareTripleChecker+Valid, 3876 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:00,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8090 Valid, 3876 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:37:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61949 states. [2023-11-28 23:37:01,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61949 to 37649. [2023-11-28 23:37:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37649 states, 37647 states have (on average 1.4463038223497224) internal successors, (54449), 37648 states have internal predecessors, (54449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37649 states to 37649 states and 54449 transitions. [2023-11-28 23:37:01,804 INFO L78 Accepts]: Start accepts. Automaton has 37649 states and 54449 transitions. Word has length 86 [2023-11-28 23:37:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:01,804 INFO L495 AbstractCegarLoop]: Abstraction has 37649 states and 54449 transitions. [2023-11-28 23:37:01,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 37649 states and 54449 transitions. [2023-11-28 23:37:01,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-28 23:37:01,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:01,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:01,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-28 23:37:01,807 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:01,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:01,807 INFO L85 PathProgramCache]: Analyzing trace with hash 779581351, now seen corresponding path program 1 times [2023-11-28 23:37:01,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:01,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917077071] [2023-11-28 23:37:01,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:01,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 23:37:02,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:02,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917077071] [2023-11-28 23:37:02,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917077071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:37:02,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:37:02,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:37:02,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079113177] [2023-11-28 23:37:02,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:37:02,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:37:02,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:02,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:37:02,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:37:02,093 INFO L87 Difference]: Start difference. First operand 37649 states and 54449 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:03,866 INFO L93 Difference]: Finished difference Result 75071 states and 108920 transitions. [2023-11-28 23:37:03,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:37:03,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-11-28 23:37:03,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:03,926 INFO L225 Difference]: With dead ends: 75071 [2023-11-28 23:37:03,927 INFO L226 Difference]: Without dead ends: 68509 [2023-11-28 23:37:03,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:37:03,939 INFO L413 NwaCegarLoop]: 1634 mSDtfsCounter, 8030 mSDsluCounter, 2372 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8030 SdHoareTripleChecker+Valid, 4006 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:03,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8030 Valid, 4006 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:37:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68509 states. [2023-11-28 23:37:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68509 to 44209. [2023-11-28 23:37:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44209 states, 44207 states have (on average 1.4452236071210443) internal successors, (63889), 44208 states have internal predecessors, (63889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44209 states to 44209 states and 63889 transitions. [2023-11-28 23:37:05,348 INFO L78 Accepts]: Start accepts. Automaton has 44209 states and 63889 transitions. Word has length 86 [2023-11-28 23:37:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:05,348 INFO L495 AbstractCegarLoop]: Abstraction has 44209 states and 63889 transitions. [2023-11-28 23:37:05,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 44209 states and 63889 transitions. [2023-11-28 23:37:05,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-28 23:37:05,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:05,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:05,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-28 23:37:05,352 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:05,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:05,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1312295887, now seen corresponding path program 1 times [2023-11-28 23:37:05,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:05,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982016279] [2023-11-28 23:37:05,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:05,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:05,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:05,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982016279] [2023-11-28 23:37:05,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982016279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:37:05,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:37:05,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:37:05,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807871237] [2023-11-28 23:37:05,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:37:05,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:37:05,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:05,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:37:05,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:37:05,434 INFO L87 Difference]: Start difference. First operand 44209 states and 63889 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:06,128 INFO L93 Difference]: Finished difference Result 74186 states and 107593 transitions. [2023-11-28 23:37:06,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:37:06,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-11-28 23:37:06,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:06,156 INFO L225 Difference]: With dead ends: 74186 [2023-11-28 23:37:06,156 INFO L226 Difference]: Without dead ends: 31528 [2023-11-28 23:37:06,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:37:06,179 INFO L413 NwaCegarLoop]: 1607 mSDtfsCounter, 58 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 3152 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:06,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 3152 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:37:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31528 states. [2023-11-28 23:37:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31528 to 31526. [2023-11-28 23:37:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31526 states, 31524 states have (on average 1.452797868290826) internal successors, (45798), 31525 states have internal predecessors, (45798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31526 states to 31526 states and 45798 transitions. [2023-11-28 23:37:07,548 INFO L78 Accepts]: Start accepts. Automaton has 31526 states and 45798 transitions. Word has length 88 [2023-11-28 23:37:07,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:07,548 INFO L495 AbstractCegarLoop]: Abstraction has 31526 states and 45798 transitions. [2023-11-28 23:37:07,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand 31526 states and 45798 transitions. [2023-11-28 23:37:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-28 23:37:07,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:07,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:07,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-28 23:37:07,551 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:07,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:07,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2051734284, now seen corresponding path program 1 times [2023-11-28 23:37:07,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:07,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116402309] [2023-11-28 23:37:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:07,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:37:07,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:07,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116402309] [2023-11-28 23:37:07,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116402309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:37:07,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:37:07,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 23:37:07,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306955444] [2023-11-28 23:37:07,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:37:07,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:37:07,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:37:07,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:37:07,780 INFO L87 Difference]: Start difference. First operand 31526 states and 45798 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:09,423 INFO L93 Difference]: Finished difference Result 59188 states and 86125 transitions. [2023-11-28 23:37:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 23:37:09,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-11-28 23:37:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:09,472 INFO L225 Difference]: With dead ends: 59188 [2023-11-28 23:37:09,472 INFO L226 Difference]: Without dead ends: 54578 [2023-11-28 23:37:09,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:37:09,482 INFO L413 NwaCegarLoop]: 1625 mSDtfsCounter, 8040 mSDsluCounter, 2324 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8040 SdHoareTripleChecker+Valid, 3949 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:09,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8040 Valid, 3949 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:37:09,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54578 states. [2023-11-28 23:37:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54578 to 36134. [2023-11-28 23:37:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36134 states, 36132 states have (on average 1.4517325362559503) internal successors, (52454), 36133 states have internal predecessors, (52454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36134 states to 36134 states and 52454 transitions. [2023-11-28 23:37:10,733 INFO L78 Accepts]: Start accepts. Automaton has 36134 states and 52454 transitions. Word has length 88 [2023-11-28 23:37:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:10,733 INFO L495 AbstractCegarLoop]: Abstraction has 36134 states and 52454 transitions. [2023-11-28 23:37:10,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 36134 states and 52454 transitions. [2023-11-28 23:37:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-28 23:37:10,736 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:10,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:10,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-28 23:37:10,736 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:10,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1778271343, now seen corresponding path program 1 times [2023-11-28 23:37:10,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:10,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591440832] [2023-11-28 23:37:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:10,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:10,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:10,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591440832] [2023-11-28 23:37:10,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591440832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:37:10,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:37:10,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:37:10,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901588832] [2023-11-28 23:37:10,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:37:10,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:37:10,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:10,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:37:10,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:37:10,852 INFO L87 Difference]: Start difference. First operand 36134 states and 52454 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:11,503 INFO L93 Difference]: Finished difference Result 53418 states and 77416 transitions. [2023-11-28 23:37:11,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:37:11,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-11-28 23:37:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:11,518 INFO L225 Difference]: With dead ends: 53418 [2023-11-28 23:37:11,518 INFO L226 Difference]: Without dead ends: 18856 [2023-11-28 23:37:11,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:37:11,529 INFO L413 NwaCegarLoop]: 1600 mSDtfsCounter, 53 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3137 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:11,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3137 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:37:11,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18856 states. [2023-11-28 23:37:12,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18856 to 18854. [2023-11-28 23:37:12,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18854 states, 18852 states have (on average 1.4456821557394441) internal successors, (27254), 18853 states have internal predecessors, (27254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18854 states to 18854 states and 27254 transitions. [2023-11-28 23:37:12,042 INFO L78 Accepts]: Start accepts. Automaton has 18854 states and 27254 transitions. Word has length 89 [2023-11-28 23:37:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:12,042 INFO L495 AbstractCegarLoop]: Abstraction has 18854 states and 27254 transitions. [2023-11-28 23:37:12,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 18854 states and 27254 transitions. [2023-11-28 23:37:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-28 23:37:12,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:12,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:12,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-28 23:37:12,044 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:12,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:12,045 INFO L85 PathProgramCache]: Analyzing trace with hash -259328547, now seen corresponding path program 1 times [2023-11-28 23:37:12,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:12,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007344953] [2023-11-28 23:37:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:12,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:12,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:12,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007344953] [2023-11-28 23:37:12,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007344953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:37:12,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:37:12,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:37:12,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635588868] [2023-11-28 23:37:12,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:37:12,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:37:12,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:12,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:37:12,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:37:12,154 INFO L87 Difference]: Start difference. First operand 18854 states and 27254 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:12,527 INFO L93 Difference]: Finished difference Result 27498 states and 39616 transitions. [2023-11-28 23:37:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:37:12,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2023-11-28 23:37:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:12,536 INFO L225 Difference]: With dead ends: 27498 [2023-11-28 23:37:12,536 INFO L226 Difference]: Without dead ends: 10216 [2023-11-28 23:37:12,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:37:12,543 INFO L413 NwaCegarLoop]: 1593 mSDtfsCounter, 50 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 3122 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:12,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 3122 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:37:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10216 states. [2023-11-28 23:37:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10216 to 10214. [2023-11-28 23:37:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10214 states, 10212 states have (on average 1.4467293380336859) internal successors, (14774), 10213 states have internal predecessors, (14774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10214 states to 10214 states and 14774 transitions. [2023-11-28 23:37:12,839 INFO L78 Accepts]: Start accepts. Automaton has 10214 states and 14774 transitions. Word has length 91 [2023-11-28 23:37:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:12,839 INFO L495 AbstractCegarLoop]: Abstraction has 10214 states and 14774 transitions. [2023-11-28 23:37:12,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10214 states and 14774 transitions. [2023-11-28 23:37:12,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-28 23:37:12,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:12,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:12,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-28 23:37:12,841 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:12,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash 124348619, now seen corresponding path program 1 times [2023-11-28 23:37:12,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:12,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844702460] [2023-11-28 23:37:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:12,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:12,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:12,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844702460] [2023-11-28 23:37:12,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844702460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:37:12,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:37:12,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:37:12,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252219332] [2023-11-28 23:37:12,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:37:12,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:37:12,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:12,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:37:12,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:37:12,915 INFO L87 Difference]: Start difference. First operand 10214 states and 14774 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:13,054 INFO L93 Difference]: Finished difference Result 14538 states and 20896 transitions. [2023-11-28 23:37:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:37:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2023-11-28 23:37:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:13,059 INFO L225 Difference]: With dead ends: 14538 [2023-11-28 23:37:13,060 INFO L226 Difference]: Without dead ends: 5896 [2023-11-28 23:37:13,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:37:13,064 INFO L413 NwaCegarLoop]: 1586 mSDtfsCounter, 47 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 3107 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:13,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 3107 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:37:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5896 states. [2023-11-28 23:37:13,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5896 to 5894. [2023-11-28 23:37:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5894 states, 5892 states have (on average 1.4585879158180584) internal successors, (8594), 5893 states have internal predecessors, (8594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5894 states to 5894 states and 8594 transitions. [2023-11-28 23:37:13,219 INFO L78 Accepts]: Start accepts. Automaton has 5894 states and 8594 transitions. Word has length 93 [2023-11-28 23:37:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:13,220 INFO L495 AbstractCegarLoop]: Abstraction has 5894 states and 8594 transitions. [2023-11-28 23:37:13,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 5894 states and 8594 transitions. [2023-11-28 23:37:13,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-28 23:37:13,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:13,221 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:13,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-28 23:37:13,221 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:13,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:13,221 INFO L85 PathProgramCache]: Analyzing trace with hash 235175225, now seen corresponding path program 1 times [2023-11-28 23:37:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:13,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544008418] [2023-11-28 23:37:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:13,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:13,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:13,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544008418] [2023-11-28 23:37:13,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544008418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:37:13,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:37:13,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:37:13,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254864432] [2023-11-28 23:37:13,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:37:13,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:37:13,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:13,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:37:13,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:37:13,323 INFO L87 Difference]: Start difference. First operand 5894 states and 8594 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:13,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:13,436 INFO L93 Difference]: Finished difference Result 8058 states and 11626 transitions. [2023-11-28 23:37:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:37:13,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2023-11-28 23:37:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:13,439 INFO L225 Difference]: With dead ends: 8058 [2023-11-28 23:37:13,439 INFO L226 Difference]: Without dead ends: 3736 [2023-11-28 23:37:13,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:37:13,441 INFO L413 NwaCegarLoop]: 1579 mSDtfsCounter, 44 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3092 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:13,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3092 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:37:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2023-11-28 23:37:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3734. [2023-11-28 23:37:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3734 states, 3732 states have (on average 1.4828510182207932) internal successors, (5534), 3733 states have internal predecessors, (5534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 5534 transitions. [2023-11-28 23:37:13,522 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 5534 transitions. Word has length 95 [2023-11-28 23:37:13,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:13,522 INFO L495 AbstractCegarLoop]: Abstraction has 3734 states and 5534 transitions. [2023-11-28 23:37:13,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 5534 transitions. [2023-11-28 23:37:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-28 23:37:13,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:13,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:13,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-28 23:37:13,523 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:13,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:13,523 INFO L85 PathProgramCache]: Analyzing trace with hash -388033753, now seen corresponding path program 1 times [2023-11-28 23:37:13,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:13,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738000085] [2023-11-28 23:37:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:13,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:13,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:13,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738000085] [2023-11-28 23:37:13,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738000085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:37:13,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:37:13,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:37:13,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270178740] [2023-11-28 23:37:13,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:37:13,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:37:13,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:13,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:37:13,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:37:13,626 INFO L87 Difference]: Start difference. First operand 3734 states and 5534 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:13,704 INFO L93 Difference]: Finished difference Result 4818 states and 7036 transitions. [2023-11-28 23:37:13,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:37:13,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2023-11-28 23:37:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:13,707 INFO L225 Difference]: With dead ends: 4818 [2023-11-28 23:37:13,707 INFO L226 Difference]: Without dead ends: 2656 [2023-11-28 23:37:13,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:37:13,710 INFO L413 NwaCegarLoop]: 1572 mSDtfsCounter, 41 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3077 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:13,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 3077 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:37:13,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2023-11-28 23:37:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2654. [2023-11-28 23:37:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2652 states have (on average 1.5154600301659125) internal successors, (4019), 2653 states have internal predecessors, (4019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 4019 transitions. [2023-11-28 23:37:13,775 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 4019 transitions. Word has length 97 [2023-11-28 23:37:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:13,775 INFO L495 AbstractCegarLoop]: Abstraction has 2654 states and 4019 transitions. [2023-11-28 23:37:13,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 4019 transitions. [2023-11-28 23:37:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-28 23:37:13,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:13,776 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:13,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-28 23:37:13,777 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:13,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:13,777 INFO L85 PathProgramCache]: Analyzing trace with hash -275510635, now seen corresponding path program 1 times [2023-11-28 23:37:13,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:13,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116088310] [2023-11-28 23:37:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:13,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:14,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:14,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116088310] [2023-11-28 23:37:14,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116088310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:37:14,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090965817] [2023-11-28 23:37:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:14,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:37:14,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:37:14,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:37:14,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:37:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:15,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-28 23:37:15,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:37:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:37:15,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:37:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:37:15,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090965817] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:37:15,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:37:15,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 4] total 18 [2023-11-28 23:37:15,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358829516] [2023-11-28 23:37:15,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:37:15,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 23:37:15,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:15,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 23:37:15,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-11-28 23:37:15,545 INFO L87 Difference]: Start difference. First operand 2654 states and 4019 transitions. Second operand has 18 states, 18 states have (on average 15.722222222222221) internal successors, (283), 18 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:19,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:19,035 INFO L93 Difference]: Finished difference Result 11485 states and 15961 transitions. [2023-11-28 23:37:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-28 23:37:19,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.722222222222221) internal successors, (283), 18 states have internal predecessors, (283), 0 states have call successors, (0), 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 99 [2023-11-28 23:37:19,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:19,044 INFO L225 Difference]: With dead ends: 11485 [2023-11-28 23:37:19,044 INFO L226 Difference]: Without dead ends: 10403 [2023-11-28 23:37:19,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=747, Invalid=3285, Unknown=0, NotChecked=0, Total=4032 [2023-11-28 23:37:19,049 INFO L413 NwaCegarLoop]: 1527 mSDtfsCounter, 17502 mSDsluCounter, 6456 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17502 SdHoareTripleChecker+Valid, 7983 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:19,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17502 Valid, 7983 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 23:37:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10403 states. [2023-11-28 23:37:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10403 to 10059. [2023-11-28 23:37:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10059 states, 10057 states have (on average 1.361837526101223) internal successors, (13696), 10058 states have internal predecessors, (13696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10059 states to 10059 states and 13696 transitions. [2023-11-28 23:37:19,338 INFO L78 Accepts]: Start accepts. Automaton has 10059 states and 13696 transitions. Word has length 99 [2023-11-28 23:37:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:19,338 INFO L495 AbstractCegarLoop]: Abstraction has 10059 states and 13696 transitions. [2023-11-28 23:37:19,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.722222222222221) internal successors, (283), 18 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 10059 states and 13696 transitions. [2023-11-28 23:37:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-28 23:37:19,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:19,339 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:19,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:37:19,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-28 23:37:19,540 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:19,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:19,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1497570702, now seen corresponding path program 1 times [2023-11-28 23:37:19,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:19,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274529229] [2023-11-28 23:37:19,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:19,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:19,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:19,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274529229] [2023-11-28 23:37:19,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274529229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:37:19,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404904583] [2023-11-28 23:37:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:19,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:37:19,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:37:19,986 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:37:19,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:37:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:20,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 23:37:20,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:37:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:20,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:37:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:22,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404904583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:37:22,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:37:22,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 27 [2023-11-28 23:37:22,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190313970] [2023-11-28 23:37:22,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:37:22,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-28 23:37:22,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:22,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-28 23:37:22,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-11-28 23:37:22,033 INFO L87 Difference]: Start difference. First operand 10059 states and 13696 transitions. Second operand has 27 states, 27 states have (on average 9.666666666666666) internal successors, (261), 27 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:23,348 INFO L93 Difference]: Finished difference Result 25057 states and 33132 transitions. [2023-11-28 23:37:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 23:37:23,348 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 9.666666666666666) internal successors, (261), 27 states have internal predecessors, (261), 0 states have call successors, (0), 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 100 [2023-11-28 23:37:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:23,360 INFO L225 Difference]: With dead ends: 25057 [2023-11-28 23:37:23,360 INFO L226 Difference]: Without dead ends: 16890 [2023-11-28 23:37:23,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=329, Invalid=1231, Unknown=0, NotChecked=0, Total=1560 [2023-11-28 23:37:23,366 INFO L413 NwaCegarLoop]: 1525 mSDtfsCounter, 12180 mSDsluCounter, 9489 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12180 SdHoareTripleChecker+Valid, 11014 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:23,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12180 Valid, 11014 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:37:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16890 states. [2023-11-28 23:37:23,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16890 to 16374. [2023-11-28 23:37:24,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16374 states, 16372 states have (on average 1.3309308575616907) internal successors, (21790), 16373 states have internal predecessors, (21790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16374 states to 16374 states and 21790 transitions. [2023-11-28 23:37:24,020 INFO L78 Accepts]: Start accepts. Automaton has 16374 states and 21790 transitions. Word has length 100 [2023-11-28 23:37:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:24,020 INFO L495 AbstractCegarLoop]: Abstraction has 16374 states and 21790 transitions. [2023-11-28 23:37:24,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.666666666666666) internal successors, (261), 27 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:24,021 INFO L276 IsEmpty]: Start isEmpty. Operand 16374 states and 21790 transitions. [2023-11-28 23:37:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-28 23:37:24,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:24,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:24,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:37:24,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-28 23:37:24,223 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:24,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:24,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2130549902, now seen corresponding path program 1 times [2023-11-28 23:37:24,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:24,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129531339] [2023-11-28 23:37:24,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:24,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:25,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:25,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129531339] [2023-11-28 23:37:25,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129531339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:37:25,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645979572] [2023-11-28 23:37:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:25,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:37:25,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:37:25,135 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:37:25,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:37:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:25,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 23:37:25,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:37:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:25,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:37:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:26,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645979572] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:37:26,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:37:26,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2023-11-28 23:37:26,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127798998] [2023-11-28 23:37:26,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:37:26,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 23:37:26,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:26,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 23:37:26,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2023-11-28 23:37:26,821 INFO L87 Difference]: Start difference. First operand 16374 states and 21790 transitions. Second operand has 26 states, 26 states have (on average 10.26923076923077) internal successors, (267), 25 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:28,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:28,032 INFO L93 Difference]: Finished difference Result 29519 states and 38732 transitions. [2023-11-28 23:37:28,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 23:37:28,033 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 10.26923076923077) internal successors, (267), 25 states have internal predecessors, (267), 0 states have call successors, (0), 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 100 [2023-11-28 23:37:28,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:28,047 INFO L225 Difference]: With dead ends: 29519 [2023-11-28 23:37:28,047 INFO L226 Difference]: Without dead ends: 17410 [2023-11-28 23:37:28,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2023-11-28 23:37:28,053 INFO L413 NwaCegarLoop]: 1525 mSDtfsCounter, 21584 mSDsluCounter, 6339 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21584 SdHoareTripleChecker+Valid, 7864 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:28,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21584 Valid, 7864 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:37:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17410 states. [2023-11-28 23:37:28,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17410 to 15342. [2023-11-28 23:37:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15342 states, 15340 states have (on average 1.3128422425032595) internal successors, (20139), 15341 states have internal predecessors, (20139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:28,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15342 states to 15342 states and 20139 transitions. [2023-11-28 23:37:28,639 INFO L78 Accepts]: Start accepts. Automaton has 15342 states and 20139 transitions. Word has length 100 [2023-11-28 23:37:28,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:28,640 INFO L495 AbstractCegarLoop]: Abstraction has 15342 states and 20139 transitions. [2023-11-28 23:37:28,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.26923076923077) internal successors, (267), 25 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:28,640 INFO L276 IsEmpty]: Start isEmpty. Operand 15342 states and 20139 transitions. [2023-11-28 23:37:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-28 23:37:28,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:28,641 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:28,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:37:28,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-28 23:37:28,841 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:28,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:28,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1607945692, now seen corresponding path program 1 times [2023-11-28 23:37:28,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:28,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165556473] [2023-11-28 23:37:28,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:28,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:29,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:29,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165556473] [2023-11-28 23:37:29,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165556473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:37:29,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035538842] [2023-11-28 23:37:29,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:29,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:37:29,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:37:29,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:37:29,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:37:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:29,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 23:37:29,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:37:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:30,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:37:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:31,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035538842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:37:31,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:37:31,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 32 [2023-11-28 23:37:31,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794128275] [2023-11-28 23:37:31,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:37:31,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-28 23:37:31,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:31,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-28 23:37:31,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2023-11-28 23:37:31,385 INFO L87 Difference]: Start difference. First operand 15342 states and 20139 transitions. Second operand has 32 states, 32 states have (on average 7.71875) internal successors, (247), 32 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:33,736 INFO L93 Difference]: Finished difference Result 42054 states and 54138 transitions. [2023-11-28 23:37:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-28 23:37:33,737 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 7.71875) internal successors, (247), 32 states have internal predecessors, (247), 0 states have call successors, (0), 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 100 [2023-11-28 23:37:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:33,763 INFO L225 Difference]: With dead ends: 42054 [2023-11-28 23:37:33,763 INFO L226 Difference]: Without dead ends: 28768 [2023-11-28 23:37:33,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=704, Invalid=2488, Unknown=0, NotChecked=0, Total=3192 [2023-11-28 23:37:33,774 INFO L413 NwaCegarLoop]: 1542 mSDtfsCounter, 22888 mSDsluCounter, 5167 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22888 SdHoareTripleChecker+Valid, 6709 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:33,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22888 Valid, 6709 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 23:37:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28768 states. [2023-11-28 23:37:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28768 to 18482. [2023-11-28 23:37:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18482 states, 18480 states have (on average 1.3030844155844157) internal successors, (24081), 18481 states have internal predecessors, (24081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18482 states to 18482 states and 24081 transitions. [2023-11-28 23:37:34,664 INFO L78 Accepts]: Start accepts. Automaton has 18482 states and 24081 transitions. Word has length 100 [2023-11-28 23:37:34,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:34,664 INFO L495 AbstractCegarLoop]: Abstraction has 18482 states and 24081 transitions. [2023-11-28 23:37:34,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.71875) internal successors, (247), 32 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 18482 states and 24081 transitions. [2023-11-28 23:37:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-28 23:37:34,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:34,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:34,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 23:37:34,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-28 23:37:34,867 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:34,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash 512036355, now seen corresponding path program 1 times [2023-11-28 23:37:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:34,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721138674] [2023-11-28 23:37:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:34,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:35,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:35,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721138674] [2023-11-28 23:37:35,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721138674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:37:35,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286102134] [2023-11-28 23:37:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:35,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:37:35,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:37:35,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:37:35,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 23:37:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:35,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 23:37:35,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:37:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:36,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:37:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:37,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286102134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:37:37,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:37:37,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2023-11-28 23:37:37,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449334011] [2023-11-28 23:37:37,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:37:37,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-28 23:37:37,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-28 23:37:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2023-11-28 23:37:37,143 INFO L87 Difference]: Start difference. First operand 18482 states and 24081 transitions. Second operand has 28 states, 28 states have (on average 9.214285714285714) internal successors, (258), 28 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:39,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:39,510 INFO L93 Difference]: Finished difference Result 54232 states and 69518 transitions. [2023-11-28 23:37:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-28 23:37:39,510 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 9.214285714285714) internal successors, (258), 28 states have internal predecessors, (258), 0 states have call successors, (0), 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 101 [2023-11-28 23:37:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:39,538 INFO L225 Difference]: With dead ends: 54232 [2023-11-28 23:37:39,538 INFO L226 Difference]: Without dead ends: 37748 [2023-11-28 23:37:39,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2023-11-28 23:37:39,550 INFO L413 NwaCegarLoop]: 1546 mSDtfsCounter, 15017 mSDsluCounter, 8131 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15017 SdHoareTripleChecker+Valid, 9677 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:39,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15017 Valid, 9677 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:37:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37748 states. [2023-11-28 23:37:41,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37748 to 35840. [2023-11-28 23:37:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35840 states, 35838 states have (on average 1.2772755176070094) internal successors, (45775), 35839 states have internal predecessors, (45775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35840 states to 35840 states and 45775 transitions. [2023-11-28 23:37:41,146 INFO L78 Accepts]: Start accepts. Automaton has 35840 states and 45775 transitions. Word has length 101 [2023-11-28 23:37:41,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:41,146 INFO L495 AbstractCegarLoop]: Abstraction has 35840 states and 45775 transitions. [2023-11-28 23:37:41,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.214285714285714) internal successors, (258), 28 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 35840 states and 45775 transitions. [2023-11-28 23:37:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-28 23:37:41,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:41,148 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:41,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 23:37:41,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:37:41,348 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:41,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:41,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2071389260, now seen corresponding path program 1 times [2023-11-28 23:37:41,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:41,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396332700] [2023-11-28 23:37:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:41,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:41,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:41,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396332700] [2023-11-28 23:37:41,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396332700] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:37:41,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958447515] [2023-11-28 23:37:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:41,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:37:41,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:37:41,771 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:37:41,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 23:37:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:41,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-28 23:37:41,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:37:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:43,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:37:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:44,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958447515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:37:44,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:37:44,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 30 [2023-11-28 23:37:44,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928378218] [2023-11-28 23:37:44,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:37:44,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-28 23:37:44,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:44,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-28 23:37:44,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2023-11-28 23:37:44,079 INFO L87 Difference]: Start difference. First operand 35840 states and 45775 transitions. Second operand has 30 states, 30 states have (on average 9.766666666666667) internal successors, (293), 30 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:37:52,155 INFO L93 Difference]: Finished difference Result 108882 states and 136231 transitions. [2023-11-28 23:37:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-28 23:37:52,155 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 9.766666666666667) internal successors, (293), 30 states have internal predecessors, (293), 0 states have call successors, (0), 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 102 [2023-11-28 23:37:52,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:37:52,218 INFO L225 Difference]: With dead ends: 108882 [2023-11-28 23:37:52,218 INFO L226 Difference]: Without dead ends: 78528 [2023-11-28 23:37:52,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1143, Invalid=4709, Unknown=0, NotChecked=0, Total=5852 [2023-11-28 23:37:52,237 INFO L413 NwaCegarLoop]: 1536 mSDtfsCounter, 10888 mSDsluCounter, 17306 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10888 SdHoareTripleChecker+Valid, 18842 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:37:52,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10888 Valid, 18842 Invalid, 1356 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [40 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 23:37:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78528 states. [2023-11-28 23:37:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78528 to 67304. [2023-11-28 23:37:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67304 states, 67302 states have (on average 1.2545392410329559) internal successors, (84433), 67303 states have internal predecessors, (84433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67304 states to 67304 states and 84433 transitions. [2023-11-28 23:37:56,456 INFO L78 Accepts]: Start accepts. Automaton has 67304 states and 84433 transitions. Word has length 102 [2023-11-28 23:37:56,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:37:56,456 INFO L495 AbstractCegarLoop]: Abstraction has 67304 states and 84433 transitions. [2023-11-28 23:37:56,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.766666666666667) internal successors, (293), 30 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:37:56,456 INFO L276 IsEmpty]: Start isEmpty. Operand 67304 states and 84433 transitions. [2023-11-28 23:37:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-28 23:37:56,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:37:56,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:37:56,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 23:37:56,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-28 23:37:56,659 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:37:56,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:37:56,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1603445, now seen corresponding path program 1 times [2023-11-28 23:37:56,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:37:56,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291223810] [2023-11-28 23:37:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:56,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:37:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:37:57,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291223810] [2023-11-28 23:37:57,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291223810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:37:57,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333743917] [2023-11-28 23:37:57,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:37:57,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:37:57,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:37:57,099 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:37:57,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 23:37:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:37:57,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 23:37:57,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:37:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:57,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:37:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:37:59,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333743917] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:37:59,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:37:59,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 29 [2023-11-28 23:37:59,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165433301] [2023-11-28 23:37:59,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:37:59,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-28 23:37:59,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:37:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-28 23:37:59,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2023-11-28 23:37:59,089 INFO L87 Difference]: Start difference. First operand 67304 states and 84433 transitions. Second operand has 29 states, 29 states have (on average 9.344827586206897) internal successors, (271), 29 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:38:06,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:38:06,622 INFO L93 Difference]: Finished difference Result 199162 states and 248559 transitions. [2023-11-28 23:38:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-28 23:38:06,623 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 9.344827586206897) internal successors, (271), 29 states have internal predecessors, (271), 0 states have call successors, (0), 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 103 [2023-11-28 23:38:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:38:06,769 INFO L225 Difference]: With dead ends: 199162 [2023-11-28 23:38:06,769 INFO L226 Difference]: Without dead ends: 140780 [2023-11-28 23:38:06,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2023-11-28 23:38:06,798 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 12331 mSDsluCounter, 8028 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12331 SdHoareTripleChecker+Valid, 9568 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:38:06,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12331 Valid, 9568 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:38:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140780 states. [2023-11-28 23:38:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140780 to 133758. [2023-11-28 23:38:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133758 states, 133756 states have (on average 1.23932384341637) internal successors, (165767), 133757 states have internal predecessors, (165767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:38:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133758 states to 133758 states and 165767 transitions. [2023-11-28 23:38:14,466 INFO L78 Accepts]: Start accepts. Automaton has 133758 states and 165767 transitions. Word has length 103 [2023-11-28 23:38:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:38:14,466 INFO L495 AbstractCegarLoop]: Abstraction has 133758 states and 165767 transitions. [2023-11-28 23:38:14,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.344827586206897) internal successors, (271), 29 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:38:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 133758 states and 165767 transitions. [2023-11-28 23:38:14,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-28 23:38:14,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:38:14,470 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:38:14,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 23:38:14,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-28 23:38:14,671 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:38:14,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:38:14,672 INFO L85 PathProgramCache]: Analyzing trace with hash -964081404, now seen corresponding path program 1 times [2023-11-28 23:38:14,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:38:14,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881490480] [2023-11-28 23:38:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:38:14,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:38:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:38:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:38:15,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:38:15,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881490480] [2023-11-28 23:38:15,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881490480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:38:15,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929563309] [2023-11-28 23:38:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:38:15,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:38:15,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:38:15,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:38:15,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 23:38:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:38:15,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 23:38:15,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:38:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:38:16,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:38:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:38:18,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929563309] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:38:18,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:38:18,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 38 [2023-11-28 23:38:18,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013347399] [2023-11-28 23:38:18,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:38:18,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-28 23:38:18,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:38:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-28 23:38:18,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2023-11-28 23:38:18,775 INFO L87 Difference]: Start difference. First operand 133758 states and 165767 transitions. Second operand has 38 states, 38 states have (on average 7.605263157894737) internal successors, (289), 38 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:38:34,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:38:34,734 INFO L93 Difference]: Finished difference Result 215026 states and 264603 transitions. [2023-11-28 23:38:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-28 23:38:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 7.605263157894737) internal successors, (289), 38 states have internal predecessors, (289), 0 states have call successors, (0), 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 104 [2023-11-28 23:38:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:38:35,013 INFO L225 Difference]: With dead ends: 215026 [2023-11-28 23:38:35,014 INFO L226 Difference]: Without dead ends: 157046 [2023-11-28 23:38:35,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1980, Invalid=8120, Unknown=0, NotChecked=0, Total=10100 [2023-11-28 23:38:35,050 INFO L413 NwaCegarLoop]: 1563 mSDtfsCounter, 14078 mSDsluCounter, 20584 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14078 SdHoareTripleChecker+Valid, 22147 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:38:35,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14078 Valid, 22147 Invalid, 2050 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [75 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-28 23:38:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157046 states. [2023-11-28 23:38:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157046 to 117442. [2023-11-28 23:38:42,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117442 states, 117440 states have (on average 1.2360354223433243) internal successors, (145160), 117441 states have internal predecessors, (145160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:38:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117442 states to 117442 states and 145160 transitions. [2023-11-28 23:38:43,012 INFO L78 Accepts]: Start accepts. Automaton has 117442 states and 145160 transitions. Word has length 104 [2023-11-28 23:38:43,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:38:43,012 INFO L495 AbstractCegarLoop]: Abstraction has 117442 states and 145160 transitions. [2023-11-28 23:38:43,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 7.605263157894737) internal successors, (289), 38 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:38:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 117442 states and 145160 transitions. [2023-11-28 23:38:43,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-28 23:38:43,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:38:43,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:38:43,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 23:38:43,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-28 23:38:43,215 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:38:43,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:38:43,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1810973692, now seen corresponding path program 1 times [2023-11-28 23:38:43,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:38:43,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054954422] [2023-11-28 23:38:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:38:43,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:38:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:38:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:38:44,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:38:44,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054954422] [2023-11-28 23:38:44,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054954422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:38:44,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327033977] [2023-11-28 23:38:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:38:44,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:38:44,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:38:44,236 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:38:44,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b70bed8-a490-428f-9cfa-b238539cad50/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 23:38:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:38:44,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-28 23:38:44,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:38:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:38:56,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:39:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:39:14,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327033977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:39:14,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:39:14,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 32, 42] total 83 [2023-11-28 23:39:14,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245112666] [2023-11-28 23:39:14,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:39:14,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-11-28 23:39:14,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:39:14,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-11-28 23:39:14,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=5941, Unknown=0, NotChecked=0, Total=6806 [2023-11-28 23:39:14,500 INFO L87 Difference]: Start difference. First operand 117442 states and 145160 transitions. Second operand has 83 states, 83 states have (on average 3.4216867469879517) internal successors, (284), 83 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:43,310 WARN L293 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 295 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:41:50,526 WARN L293 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 298 DAG size of output: 290 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:42:27,283 WARN L293 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 298 DAG size of output: 290 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:44:07,245 WARN L293 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 297 DAG size of output: 290 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:44:35,170 WARN L293 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 296 DAG size of output: 288 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:45:54,908 WARN L293 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 300 DAG size of output: 292 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:46:38,930 WARN L293 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 301 DAG size of output: 294 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:47:04,184 WARN L293 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 293 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:47:21,722 WARN L293 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 298 DAG size of output: 291 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:47:52,779 WARN L293 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 296 DAG size of output: 288 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:48:07,639 WARN L293 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 282 DAG size of output: 273 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:48:30,124 WARN L293 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 289 DAG size of output: 280 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:49:39,463 WARN L293 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 287 DAG size of output: 278 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 23:50:14,020 WARN L293 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 284 DAG size of output: 275 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)