./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.5_overflow.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_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 24a2674686e3cd976907355f3a5c851b85884bd28355ffc3fa271cccc21387fd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:56:58,520 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:56:58,653 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:56:58,659 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:56:58,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:56:58,686 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:56:58,687 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:56:58,687 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:56:58,688 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:56:58,689 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:56:58,689 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:56:58,690 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:56:58,690 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:56:58,691 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:56:58,691 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:56:58,692 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:56:58,692 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:56:58,693 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:56:58,693 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:56:58,694 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:56:58,694 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:56:58,695 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:56:58,695 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:56:58,696 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:56:58,696 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:56:58,696 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:56:58,697 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:56:58,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:56:58,698 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:56:58,698 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:56:58,698 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:56:58,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:56:58,699 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:56:58,699 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:56:58,700 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:56:58,700 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:56:58,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:56:58,700 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:56:58,700 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:56:58,701 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:56:58,701 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:56:58,701 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:56:58,701 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_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24a2674686e3cd976907355f3a5c851b85884bd28355ffc3fa271cccc21387fd [2023-11-26 11:56:58,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:56:58,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:56:59,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:56:59,002 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:56:59,003 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:56:59,004 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2023-11-26 11:57:02,189 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:57:02,872 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:57:02,874 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2023-11-26 11:57:02,916 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/data/d5d938480/31558f300be544df8a95aba572f0ba04/FLAGb6a5b0eb5 [2023-11-26 11:57:03,341 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/data/d5d938480/31558f300be544df8a95aba572f0ba04 [2023-11-26 11:57:03,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:57:03,348 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:57:03,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:03,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:57:03,355 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:57:03,356 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:03" (1/1) ... [2023-11-26 11:57:03,357 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4079f8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:03, skipping insertion in model container [2023-11-26 11:57:03,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:03" (1/1) ... [2023-11-26 11:57:03,519 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:57:04,004 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_26acff0b-d0ad-4ea1-be72-566c81ab9b57/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[11742,11755] [2023-11-26 11:57:04,108 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_26acff0b-d0ad-4ea1-be72-566c81ab9b57/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[17297,17310] [2023-11-26 11:57:04,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:05,010 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:57:05,066 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_26acff0b-d0ad-4ea1-be72-566c81ab9b57/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[11742,11755] [2023-11-26 11:57:05,078 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_26acff0b-d0ad-4ea1-be72-566c81ab9b57/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[17297,17310] [2023-11-26 11:57:05,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:05,668 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:57:05,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05 WrapperNode [2023-11-26 11:57:05,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:05,671 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:05,671 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:57:05,672 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:57:05,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:05,746 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:06,284 INFO L138 Inliner]: procedures = 37, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5089 [2023-11-26 11:57:06,285 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:06,285 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:57:06,286 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:57:06,286 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:57:06,299 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:06,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:06,362 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:06,609 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:57:06,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:06,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:06,819 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:06,859 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:06,899 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:06,965 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:07,136 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:57:07,137 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:57:07,137 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:57:07,137 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:57:07,138 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (1/1) ... [2023-11-26 11:57:07,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:07,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:07,178 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:57:07,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:57:07,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:57:07,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:57:07,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:57:07,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:57:07,348 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:57:07,351 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:57:13,112 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:57:13,186 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:57:13,186 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:57:13,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:13 BoogieIcfgContainer [2023-11-26 11:57:13,187 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:57:13,189 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:57:13,189 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:57:13,192 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:57:13,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:57:03" (1/3) ... [2023-11-26 11:57:13,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53747a38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:13, skipping insertion in model container [2023-11-26 11:57:13,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:05" (2/3) ... [2023-11-26 11:57:13,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53747a38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:13, skipping insertion in model container [2023-11-26 11:57:13,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:13" (3/3) ... [2023-11-26 11:57:13,195 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2023-11-26 11:57:13,214 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:57:13,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-26 11:57:13,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:57:13,293 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;@66326afa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:57:13,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-26 11:57:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 834 states, 831 states have (on average 1.9759326113116726) internal successors, (1642), 833 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 11:57:13,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:13,312 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] [2023-11-26 11:57:13,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:13,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:13,318 INFO L85 PathProgramCache]: Analyzing trace with hash -606284215, now seen corresponding path program 1 times [2023-11-26 11:57:13,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:13,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611126255] [2023-11-26 11:57:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:13,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:13,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:13,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611126255] [2023-11-26 11:57:13,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611126255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:13,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:13,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:57:13,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391346135] [2023-11-26 11:57:13,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:13,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:57:13,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:13,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:57:13,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:57:13,681 INFO L87 Difference]: Start difference. First operand has 834 states, 831 states have (on average 1.9759326113116726) internal successors, (1642), 833 states have internal predecessors, (1642), 0 states have call successors, (0), 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 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:13,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:13,813 INFO L93 Difference]: Finished difference Result 1632 states and 3215 transitions. [2023-11-26 11:57:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:57:13,816 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-26 11:57:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:13,836 INFO L225 Difference]: With dead ends: 1632 [2023-11-26 11:57:13,836 INFO L226 Difference]: Without dead ends: 830 [2023-11-26 11:57:13,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:57:13,846 INFO L413 NwaCegarLoop]: 1570 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, 1570 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:13,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1570 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:13,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2023-11-26 11:57:13,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2023-11-26 11:57:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 828 states have (on average 1.8973429951690821) internal successors, (1571), 829 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1571 transitions. [2023-11-26 11:57:13,948 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1571 transitions. Word has length 21 [2023-11-26 11:57:13,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:13,949 INFO L495 AbstractCegarLoop]: Abstraction has 830 states and 1571 transitions. [2023-11-26 11:57:13,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:13,949 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1571 transitions. [2023-11-26 11:57:13,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 11:57:13,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:13,951 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] [2023-11-26 11:57:13,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:57:13,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:13,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:13,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2100335179, now seen corresponding path program 1 times [2023-11-26 11:57:13,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:13,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184766984] [2023-11-26 11:57:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:13,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:14,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184766984] [2023-11-26 11:57:14,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184766984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:14,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:14,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:57:14,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515566981] [2023-11-26 11:57:14,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:14,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:14,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:14,394 INFO L87 Difference]: Start difference. First operand 830 states and 1571 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:14,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:14,521 INFO L93 Difference]: Finished difference Result 874 states and 1640 transitions. [2023-11-26 11:57:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:14,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-26 11:57:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:14,535 INFO L225 Difference]: With dead ends: 874 [2023-11-26 11:57:14,548 INFO L226 Difference]: Without dead ends: 830 [2023-11-26 11:57:14,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:14,550 INFO L413 NwaCegarLoop]: 1568 mSDtfsCounter, 0 mSDsluCounter, 3101 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4669 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:14,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4669 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2023-11-26 11:57:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2023-11-26 11:57:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 828 states have (on average 1.8599033816425121) internal successors, (1540), 829 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1540 transitions. [2023-11-26 11:57:14,594 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1540 transitions. Word has length 21 [2023-11-26 11:57:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:14,595 INFO L495 AbstractCegarLoop]: Abstraction has 830 states and 1540 transitions. [2023-11-26 11:57:14,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:14,595 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1540 transitions. [2023-11-26 11:57:14,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-26 11:57:14,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:14,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:14,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:57:14,599 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:14,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:14,599 INFO L85 PathProgramCache]: Analyzing trace with hash -364061020, now seen corresponding path program 1 times [2023-11-26 11:57:14,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:14,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181567996] [2023-11-26 11:57:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:14,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:14,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:14,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181567996] [2023-11-26 11:57:14,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181567996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:14,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:14,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:57:14,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173957335] [2023-11-26 11:57:14,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:14,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:14,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:14,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:14,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:14,709 INFO L87 Difference]: Start difference. First operand 830 states and 1540 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) [2023-11-26 11:57:19,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:19,931 INFO L93 Difference]: Finished difference Result 2334 states and 4413 transitions. [2023-11-26 11:57:19,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:19,932 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 [2023-11-26 11:57:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:19,943 INFO L225 Difference]: With dead ends: 2334 [2023-11-26 11:57:19,943 INFO L226 Difference]: Without dead ends: 1581 [2023-11-26 11:57:19,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:19,946 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 869 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2280 mSolverCounterSat, 998 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 3278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:19,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 175 Invalid, 3278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2280 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-26 11:57:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2023-11-26 11:57:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1581. [2023-11-26 11:57:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1579 states have (on average 1.8461051298290057) internal successors, (2915), 1580 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2915 transitions. [2023-11-26 11:57:20,007 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2915 transitions. Word has length 47 [2023-11-26 11:57:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:20,007 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2915 transitions. [2023-11-26 11:57:20,008 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) [2023-11-26 11:57:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2915 transitions. [2023-11-26 11:57:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-26 11:57:20,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:20,011 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] [2023-11-26 11:57:20,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:57:20,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:20,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:20,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1048618978, now seen corresponding path program 1 times [2023-11-26 11:57:20,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:20,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727462104] [2023-11-26 11:57:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:20,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:20,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:20,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727462104] [2023-11-26 11:57:20,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727462104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:20,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:20,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:57:20,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146892115] [2023-11-26 11:57:20,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:20,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:57:20,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:20,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:57:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:20,242 INFO L87 Difference]: Start difference. First operand 1581 states and 2915 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:20,587 INFO L93 Difference]: Finished difference Result 1991 states and 3575 transitions. [2023-11-26 11:57:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 11:57:20,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2023-11-26 11:57:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:20,603 INFO L225 Difference]: With dead ends: 1991 [2023-11-26 11:57:20,603 INFO L226 Difference]: Without dead ends: 1950 [2023-11-26 11:57:20,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:57:20,616 INFO L413 NwaCegarLoop]: 1533 mSDtfsCounter, 7933 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7933 SdHoareTripleChecker+Valid, 2700 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:20,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7933 Valid, 2700 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:20,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2023-11-26 11:57:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1620. [2023-11-26 11:57:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1618 states have (on average 1.8405438813349815) internal successors, (2978), 1619 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 2978 transitions. [2023-11-26 11:57:20,697 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 2978 transitions. Word has length 51 [2023-11-26 11:57:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:20,698 INFO L495 AbstractCegarLoop]: Abstraction has 1620 states and 2978 transitions. [2023-11-26 11:57:20,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 2978 transitions. [2023-11-26 11:57:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-26 11:57:20,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:20,707 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] [2023-11-26 11:57:20,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:57:20,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:20,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1740226510, now seen corresponding path program 1 times [2023-11-26 11:57:20,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:20,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166483185] [2023-11-26 11:57:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:20,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:20,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:20,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166483185] [2023-11-26 11:57:20,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166483185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:20,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:20,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:20,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734053953] [2023-11-26 11:57:20,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:20,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:20,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:20,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:20,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:20,847 INFO L87 Difference]: Start difference. First operand 1620 states and 2978 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:20,907 INFO L93 Difference]: Finished difference Result 1769 states and 3217 transitions. [2023-11-26 11:57:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:20,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2023-11-26 11:57:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:20,921 INFO L225 Difference]: With dead ends: 1769 [2023-11-26 11:57:20,921 INFO L226 Difference]: Without dead ends: 1689 [2023-11-26 11:57:20,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:20,923 INFO L413 NwaCegarLoop]: 1535 mSDtfsCounter, 1480 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:20,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 1595 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2023-11-26 11:57:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1687. [2023-11-26 11:57:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1685 states have (on average 1.83026706231454) internal successors, (3084), 1686 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 3084 transitions. [2023-11-26 11:57:20,992 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 3084 transitions. Word has length 53 [2023-11-26 11:57:20,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:20,993 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 3084 transitions. [2023-11-26 11:57:20,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 3084 transitions. [2023-11-26 11:57:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-26 11:57:20,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:20,997 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] [2023-11-26 11:57:20,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:57:20,997 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:20,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:20,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1738081558, now seen corresponding path program 1 times [2023-11-26 11:57:20,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:20,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879742728] [2023-11-26 11:57:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:20,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:21,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:21,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879742728] [2023-11-26 11:57:21,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879742728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:21,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:21,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:57:21,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237956260] [2023-11-26 11:57:21,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:21,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:57:21,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:21,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:57:21,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:21,408 INFO L87 Difference]: Start difference. First operand 1687 states and 3084 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:21,704 INFO L93 Difference]: Finished difference Result 1836 states and 3320 transitions. [2023-11-26 11:57:21,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:57:21,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2023-11-26 11:57:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:21,715 INFO L225 Difference]: With dead ends: 1836 [2023-11-26 11:57:21,715 INFO L226 Difference]: Without dead ends: 1689 [2023-11-26 11:57:21,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:57:21,717 INFO L413 NwaCegarLoop]: 1530 mSDtfsCounter, 4473 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4473 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:21,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4473 Valid, 1778 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:21,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2023-11-26 11:57:21,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1687. [2023-11-26 11:57:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1685 states have (on average 1.829080118694362) internal successors, (3082), 1686 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 3082 transitions. [2023-11-26 11:57:21,772 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 3082 transitions. Word has length 53 [2023-11-26 11:57:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:21,773 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 3082 transitions. [2023-11-26 11:57:21,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 3082 transitions. [2023-11-26 11:57:21,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-26 11:57:21,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:21,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:21,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:57:21,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:21,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:21,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1824971111, now seen corresponding path program 1 times [2023-11-26 11:57:21,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:21,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300778923] [2023-11-26 11:57:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:21,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:22,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:22,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300778923] [2023-11-26 11:57:22,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300778923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:22,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:22,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:57:22,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213031787] [2023-11-26 11:57:22,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:22,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:22,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:22,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:22,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:22,020 INFO L87 Difference]: Start difference. First operand 1687 states and 3082 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:22,084 INFO L93 Difference]: Finished difference Result 1695 states and 3091 transitions. [2023-11-26 11:57:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:22,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-26 11:57:22,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:22,097 INFO L225 Difference]: With dead ends: 1695 [2023-11-26 11:57:22,098 INFO L226 Difference]: Without dead ends: 1693 [2023-11-26 11:57:22,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:22,100 INFO L413 NwaCegarLoop]: 1536 mSDtfsCounter, 1 mSDsluCounter, 3064 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4600 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:22,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4600 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2023-11-26 11:57:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1691. [2023-11-26 11:57:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1689 states have (on average 1.8265245707519242) internal successors, (3085), 1690 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 3085 transitions. [2023-11-26 11:57:22,154 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 3085 transitions. Word has length 54 [2023-11-26 11:57:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:22,157 INFO L495 AbstractCegarLoop]: Abstraction has 1691 states and 3085 transitions. [2023-11-26 11:57:22,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 3085 transitions. [2023-11-26 11:57:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-26 11:57:22,158 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:22,159 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] [2023-11-26 11:57:22,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:57:22,160 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:22,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:22,161 INFO L85 PathProgramCache]: Analyzing trace with hash -333952342, now seen corresponding path program 1 times [2023-11-26 11:57:22,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:22,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234820152] [2023-11-26 11:57:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:22,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:22,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:22,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234820152] [2023-11-26 11:57:22,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234820152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:22,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:22,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:22,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15470465] [2023-11-26 11:57:22,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:22,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:22,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:22,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:22,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:22,231 INFO L87 Difference]: Start difference. First operand 1691 states and 3085 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:22,285 INFO L93 Difference]: Finished difference Result 1853 states and 3338 transitions. [2023-11-26 11:57:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:22,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2023-11-26 11:57:22,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:22,296 INFO L225 Difference]: With dead ends: 1853 [2023-11-26 11:57:22,297 INFO L226 Difference]: Without dead ends: 1769 [2023-11-26 11:57:22,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:22,299 INFO L413 NwaCegarLoop]: 1587 mSDtfsCounter, 1494 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:22,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1494 Valid, 1653 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2023-11-26 11:57:22,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1767. [2023-11-26 11:57:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1765 states have (on average 1.8141643059490085) internal successors, (3202), 1766 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 3202 transitions. [2023-11-26 11:57:22,354 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 3202 transitions. Word has length 55 [2023-11-26 11:57:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:22,355 INFO L495 AbstractCegarLoop]: Abstraction has 1767 states and 3202 transitions. [2023-11-26 11:57:22,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 3202 transitions. [2023-11-26 11:57:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-26 11:57:22,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:22,357 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] [2023-11-26 11:57:22,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:57:22,358 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:22,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:22,358 INFO L85 PathProgramCache]: Analyzing trace with hash -562591574, now seen corresponding path program 1 times [2023-11-26 11:57:22,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:22,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825345112] [2023-11-26 11:57:22,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:22,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:22,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:22,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825345112] [2023-11-26 11:57:22,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825345112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:22,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:22,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:22,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813392587] [2023-11-26 11:57:22,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:22,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:22,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:22,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:22,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:22,458 INFO L87 Difference]: Start difference. First operand 1767 states and 3202 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:22,512 INFO L93 Difference]: Finished difference Result 2193 states and 3862 transitions. [2023-11-26 11:57:22,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:22,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2023-11-26 11:57:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:22,524 INFO L225 Difference]: With dead ends: 2193 [2023-11-26 11:57:22,525 INFO L226 Difference]: Without dead ends: 1968 [2023-11-26 11:57:22,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:22,529 INFO L413 NwaCegarLoop]: 1579 mSDtfsCounter, 1490 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:22,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1490 Valid, 1653 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2023-11-26 11:57:22,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1966. [2023-11-26 11:57:22,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1964 states have (on average 1.7841140529531567) internal successors, (3504), 1965 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 3504 transitions. [2023-11-26 11:57:22,595 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 3504 transitions. Word has length 55 [2023-11-26 11:57:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:22,596 INFO L495 AbstractCegarLoop]: Abstraction has 1966 states and 3504 transitions. [2023-11-26 11:57:22,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 3504 transitions. [2023-11-26 11:57:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-26 11:57:22,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:22,597 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] [2023-11-26 11:57:22,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:57:22,598 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:22,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:22,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1188247638, now seen corresponding path program 1 times [2023-11-26 11:57:22,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:22,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000893173] [2023-11-26 11:57:22,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:22,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:22,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:22,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000893173] [2023-11-26 11:57:22,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000893173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:22,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:22,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:22,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351845170] [2023-11-26 11:57:22,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:22,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:22,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:22,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:22,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:22,666 INFO L87 Difference]: Start difference. First operand 1966 states and 3504 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:22,732 INFO L93 Difference]: Finished difference Result 2766 states and 4726 transitions. [2023-11-26 11:57:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:22,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2023-11-26 11:57:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:22,746 INFO L225 Difference]: With dead ends: 2766 [2023-11-26 11:57:22,747 INFO L226 Difference]: Without dead ends: 2342 [2023-11-26 11:57:22,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:22,749 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 1488 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1488 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:22,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1488 Valid, 1655 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:22,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2023-11-26 11:57:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2340. [2023-11-26 11:57:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2338 states have (on average 1.7365269461077844) internal successors, (4060), 2339 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 4060 transitions. [2023-11-26 11:57:22,830 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 4060 transitions. Word has length 55 [2023-11-26 11:57:22,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:22,830 INFO L495 AbstractCegarLoop]: Abstraction has 2340 states and 4060 transitions. [2023-11-26 11:57:22,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 4060 transitions. [2023-11-26 11:57:22,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-26 11:57:22,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:22,832 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] [2023-11-26 11:57:22,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:57:22,833 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:22,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:22,833 INFO L85 PathProgramCache]: Analyzing trace with hash -299514198, now seen corresponding path program 1 times [2023-11-26 11:57:22,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:22,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688526087] [2023-11-26 11:57:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:22,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:22,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:22,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688526087] [2023-11-26 11:57:22,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688526087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:22,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:22,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:22,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535529363] [2023-11-26 11:57:22,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:22,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:22,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:22,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:22,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:22,893 INFO L87 Difference]: Start difference. First operand 2340 states and 4060 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:22,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:22,978 INFO L93 Difference]: Finished difference Result 3840 states and 6310 transitions. [2023-11-26 11:57:22,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:22,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2023-11-26 11:57:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:22,996 INFO L225 Difference]: With dead ends: 3840 [2023-11-26 11:57:22,997 INFO L226 Difference]: Without dead ends: 3042 [2023-11-26 11:57:22,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:23,000 INFO L413 NwaCegarLoop]: 1575 mSDtfsCounter, 1486 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:23,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 1657 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:23,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2023-11-26 11:57:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 3040. [2023-11-26 11:57:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3040 states, 3038 states have (on average 1.6708360763660304) internal successors, (5076), 3039 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 5076 transitions. [2023-11-26 11:57:23,122 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 5076 transitions. Word has length 55 [2023-11-26 11:57:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:23,122 INFO L495 AbstractCegarLoop]: Abstraction has 3040 states and 5076 transitions. [2023-11-26 11:57:23,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 5076 transitions. [2023-11-26 11:57:23,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-26 11:57:23,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:23,124 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] [2023-11-26 11:57:23,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:57:23,124 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:23,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:23,125 INFO L85 PathProgramCache]: Analyzing trace with hash -602535510, now seen corresponding path program 1 times [2023-11-26 11:57:23,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:23,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199523200] [2023-11-26 11:57:23,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:23,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:23,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:23,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199523200] [2023-11-26 11:57:23,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199523200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:23,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:23,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:23,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794391907] [2023-11-26 11:57:23,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:23,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:23,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:23,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:23,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:23,184 INFO L87 Difference]: Start difference. First operand 3040 states and 5076 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:23,375 INFO L93 Difference]: Finished difference Result 5844 states and 9190 transitions. [2023-11-26 11:57:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:23,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2023-11-26 11:57:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:23,400 INFO L225 Difference]: With dead ends: 5844 [2023-11-26 11:57:23,401 INFO L226 Difference]: Without dead ends: 4346 [2023-11-26 11:57:23,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:23,404 INFO L413 NwaCegarLoop]: 1589 mSDtfsCounter, 1492 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:23,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1492 Valid, 1659 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2023-11-26 11:57:23,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 4344. [2023-11-26 11:57:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4344 states, 4342 states have (on average 1.592814371257485) internal successors, (6916), 4343 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4344 states to 4344 states and 6916 transitions. [2023-11-26 11:57:23,580 INFO L78 Accepts]: Start accepts. Automaton has 4344 states and 6916 transitions. Word has length 55 [2023-11-26 11:57:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:23,581 INFO L495 AbstractCegarLoop]: Abstraction has 4344 states and 6916 transitions. [2023-11-26 11:57:23,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 4344 states and 6916 transitions. [2023-11-26 11:57:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-26 11:57:23,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:23,584 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] [2023-11-26 11:57:23,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:57:23,584 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:23,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:23,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1175701837, now seen corresponding path program 1 times [2023-11-26 11:57:23,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:23,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110747559] [2023-11-26 11:57:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:23,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:23,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:23,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110747559] [2023-11-26 11:57:23,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110747559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:23,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:23,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:57:23,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771977883] [2023-11-26 11:57:23,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:23,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:57:23,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:23,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:57:23,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:23,767 INFO L87 Difference]: Start difference. First operand 4344 states and 6916 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:24,392 INFO L93 Difference]: Finished difference Result 18132 states and 26906 transitions. [2023-11-26 11:57:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:57:24,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-11-26 11:57:24,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:24,440 INFO L225 Difference]: With dead ends: 18132 [2023-11-26 11:57:24,440 INFO L226 Difference]: Without dead ends: 16146 [2023-11-26 11:57:24,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:57:24,449 INFO L413 NwaCegarLoop]: 1596 mSDtfsCounter, 6291 mSDsluCounter, 1965 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6291 SdHoareTripleChecker+Valid, 3561 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:24,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6291 Valid, 3561 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:24,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16146 states. [2023-11-26 11:57:24,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16146 to 6744. [2023-11-26 11:57:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6744 states, 6742 states have (on average 1.5360427172945714) internal successors, (10356), 6743 states have internal predecessors, (10356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6744 states to 6744 states and 10356 transitions. [2023-11-26 11:57:24,952 INFO L78 Accepts]: Start accepts. Automaton has 6744 states and 10356 transitions. Word has length 73 [2023-11-26 11:57:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:24,953 INFO L495 AbstractCegarLoop]: Abstraction has 6744 states and 10356 transitions. [2023-11-26 11:57:24,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 6744 states and 10356 transitions. [2023-11-26 11:57:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-26 11:57:24,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:24,956 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] [2023-11-26 11:57:24,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:57:24,956 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:24,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1404341069, now seen corresponding path program 1 times [2023-11-26 11:57:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:24,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247499310] [2023-11-26 11:57:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:24,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:57:25,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:25,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247499310] [2023-11-26 11:57:25,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247499310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:25,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:25,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:57:25,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83573549] [2023-11-26 11:57:25,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:25,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:57:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:57:25,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:25,162 INFO L87 Difference]: Start difference. First operand 6744 states and 10356 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:25,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:25,971 INFO L93 Difference]: Finished difference Result 20932 states and 30938 transitions. [2023-11-26 11:57:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:57:25,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 73 [2023-11-26 11:57:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:26,095 INFO L225 Difference]: With dead ends: 20932 [2023-11-26 11:57:26,095 INFO L226 Difference]: Without dead ends: 18130 [2023-11-26 11:57:26,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:57:26,103 INFO L413 NwaCegarLoop]: 1596 mSDtfsCounter, 6336 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6336 SdHoareTripleChecker+Valid, 3592 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:26,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6336 Valid, 3592 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18130 states. [2023-11-26 11:57:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18130 to 10536. [2023-11-26 11:57:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10536 states, 10534 states have (on average 1.49800645528764) internal successors, (15780), 10535 states have internal predecessors, (15780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10536 states to 10536 states and 15780 transitions. [2023-11-26 11:57:26,765 INFO L78 Accepts]: Start accepts. Automaton has 10536 states and 15780 transitions. Word has length 73 [2023-11-26 11:57:26,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:26,765 INFO L495 AbstractCegarLoop]: Abstraction has 10536 states and 15780 transitions. [2023-11-26 11:57:26,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:26,766 INFO L276 IsEmpty]: Start isEmpty. Operand 10536 states and 15780 transitions. [2023-11-26 11:57:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-26 11:57:26,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:26,769 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] [2023-11-26 11:57:26,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:57:26,770 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:26,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:26,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2029997133, now seen corresponding path program 1 times [2023-11-26 11:57:26,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:26,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206235988] [2023-11-26 11:57:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:26,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 11:57:26,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:26,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206235988] [2023-11-26 11:57:26,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206235988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:26,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:26,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:57:26,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682378368] [2023-11-26 11:57:26,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:26,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:57:26,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:27,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:57:27,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:27,001 INFO L87 Difference]: Start difference. First operand 10536 states and 15780 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:27,947 INFO L93 Difference]: Finished difference Result 23732 states and 34954 transitions. [2023-11-26 11:57:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:57:27,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 73 [2023-11-26 11:57:27,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:27,992 INFO L225 Difference]: With dead ends: 23732 [2023-11-26 11:57:27,992 INFO L226 Difference]: Without dead ends: 20930 [2023-11-26 11:57:28,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:57:28,001 INFO L413 NwaCegarLoop]: 1594 mSDtfsCounter, 6381 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6381 SdHoareTripleChecker+Valid, 3555 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:28,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6381 Valid, 3555 Invalid, 129 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20930 states. [2023-11-26 11:57:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20930 to 13336. [2023-11-26 11:57:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13336 states, 13334 states have (on average 1.4846257687115645) internal successors, (19796), 13335 states have internal predecessors, (19796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13336 states to 13336 states and 19796 transitions. [2023-11-26 11:57:28,592 INFO L78 Accepts]: Start accepts. Automaton has 13336 states and 19796 transitions. Word has length 73 [2023-11-26 11:57:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:28,592 INFO L495 AbstractCegarLoop]: Abstraction has 13336 states and 19796 transitions. [2023-11-26 11:57:28,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 13336 states and 19796 transitions. [2023-11-26 11:57:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-26 11:57:28,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:28,596 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] [2023-11-26 11:57:28,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:57:28,596 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:28,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:28,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1141263693, now seen corresponding path program 1 times [2023-11-26 11:57:28,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:28,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736142393] [2023-11-26 11:57:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:28,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:57:28,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:28,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736142393] [2023-11-26 11:57:28,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736142393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:28,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:28,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:57:28,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693195423] [2023-11-26 11:57:28,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:28,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:57:28,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:28,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:57:28,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:28,792 INFO L87 Difference]: Start difference. First operand 13336 states and 19796 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:29,653 INFO L93 Difference]: Finished difference Result 26532 states and 38970 transitions. [2023-11-26 11:57:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:57:29,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 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 73 [2023-11-26 11:57:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:29,699 INFO L225 Difference]: With dead ends: 26532 [2023-11-26 11:57:29,699 INFO L226 Difference]: Without dead ends: 23730 [2023-11-26 11:57:29,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:57:29,708 INFO L413 NwaCegarLoop]: 1594 mSDtfsCounter, 6341 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6341 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:29,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6341 Valid, 3577 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:29,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23730 states. [2023-11-26 11:57:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23730 to 16136. [2023-11-26 11:57:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16136 states, 16134 states have (on average 1.4758894260567745) internal successors, (23812), 16135 states have internal predecessors, (23812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 23812 transitions. [2023-11-26 11:57:30,271 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 23812 transitions. Word has length 73 [2023-11-26 11:57:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:30,272 INFO L495 AbstractCegarLoop]: Abstraction has 16136 states and 23812 transitions. [2023-11-26 11:57:30,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 23812 transitions. [2023-11-26 11:57:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-26 11:57:30,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:30,275 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] [2023-11-26 11:57:30,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 11:57:30,275 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:30,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1444285005, now seen corresponding path program 1 times [2023-11-26 11:57:30,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:30,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99437455] [2023-11-26 11:57:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:30,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:57:30,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:30,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99437455] [2023-11-26 11:57:30,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99437455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:30,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:30,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:57:30,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812245028] [2023-11-26 11:57:30,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:30,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:57:30,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:30,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:57:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:30,440 INFO L87 Difference]: Start difference. First operand 16136 states and 23812 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:31,339 INFO L93 Difference]: Finished difference Result 29332 states and 42986 transitions. [2023-11-26 11:57:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:57:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-11-26 11:57:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:31,390 INFO L225 Difference]: With dead ends: 29332 [2023-11-26 11:57:31,390 INFO L226 Difference]: Without dead ends: 26530 [2023-11-26 11:57:31,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:57:31,402 INFO L413 NwaCegarLoop]: 1593 mSDtfsCounter, 6295 mSDsluCounter, 2058 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6295 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:31,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6295 Valid, 3651 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:57:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26530 states. [2023-11-26 11:57:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26530 to 18936. [2023-11-26 11:57:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18936 states, 18934 states have (on average 1.469736981092215) internal successors, (27828), 18935 states have internal predecessors, (27828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:32,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18936 states to 18936 states and 27828 transitions. [2023-11-26 11:57:32,369 INFO L78 Accepts]: Start accepts. Automaton has 18936 states and 27828 transitions. Word has length 73 [2023-11-26 11:57:32,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:32,370 INFO L495 AbstractCegarLoop]: Abstraction has 18936 states and 27828 transitions. [2023-11-26 11:57:32,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:32,371 INFO L276 IsEmpty]: Start isEmpty. Operand 18936 states and 27828 transitions. [2023-11-26 11:57:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-26 11:57:32,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:32,375 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] [2023-11-26 11:57:32,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 11:57:32,376 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:32,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:32,377 INFO L85 PathProgramCache]: Analyzing trace with hash -923035475, now seen corresponding path program 1 times [2023-11-26 11:57:32,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:32,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122605993] [2023-11-26 11:57:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:32,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:32,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:32,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122605993] [2023-11-26 11:57:32,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122605993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:32,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:32,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:32,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543916684] [2023-11-26 11:57:32,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:32,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:32,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:32,545 INFO L87 Difference]: Start difference. First operand 18936 states and 27828 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:33,213 INFO L93 Difference]: Finished difference Result 36332 states and 52806 transitions. [2023-11-26 11:57:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:33,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-11-26 11:57:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:33,238 INFO L225 Difference]: With dead ends: 36332 [2023-11-26 11:57:33,238 INFO L226 Difference]: Without dead ends: 18938 [2023-11-26 11:57:33,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:33,259 INFO L413 NwaCegarLoop]: 1571 mSDtfsCounter, 45 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3097 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:33,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 3097 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:33,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18938 states. [2023-11-26 11:57:33,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18938 to 18936. [2023-11-26 11:57:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18936 states, 18934 states have (on average 1.4541037287419456) internal successors, (27532), 18935 states have internal predecessors, (27532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18936 states to 18936 states and 27532 transitions. [2023-11-26 11:57:33,983 INFO L78 Accepts]: Start accepts. Automaton has 18936 states and 27532 transitions. Word has length 74 [2023-11-26 11:57:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:33,983 INFO L495 AbstractCegarLoop]: Abstraction has 18936 states and 27532 transitions. [2023-11-26 11:57:33,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 18936 states and 27532 transitions. [2023-11-26 11:57:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-26 11:57:33,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:33,987 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] [2023-11-26 11:57:33,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 11:57:33,987 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:33,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash -827058053, now seen corresponding path program 1 times [2023-11-26 11:57:33,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:33,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698986445] [2023-11-26 11:57:33,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:33,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:34,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:34,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698986445] [2023-11-26 11:57:34,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698986445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:34,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:34,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:34,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772541540] [2023-11-26 11:57:34,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:34,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:34,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:34,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:34,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:34,097 INFO L87 Difference]: Start difference. First operand 18936 states and 27532 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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) [2023-11-26 11:57:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:34,346 INFO L93 Difference]: Finished difference Result 25406 states and 36809 transitions. [2023-11-26 11:57:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:34,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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 75 [2023-11-26 11:57:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:34,357 INFO L225 Difference]: With dead ends: 25406 [2023-11-26 11:57:34,357 INFO L226 Difference]: Without dead ends: 8012 [2023-11-26 11:57:34,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:34,374 INFO L413 NwaCegarLoop]: 1569 mSDtfsCounter, 39 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3094 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:34,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3094 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2023-11-26 11:57:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 8005. [2023-11-26 11:57:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8005 states, 8003 states have (on average 1.5015619142821441) internal successors, (12017), 8004 states have internal predecessors, (12017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8005 states to 8005 states and 12017 transitions. [2023-11-26 11:57:34,678 INFO L78 Accepts]: Start accepts. Automaton has 8005 states and 12017 transitions. Word has length 75 [2023-11-26 11:57:34,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:34,678 INFO L495 AbstractCegarLoop]: Abstraction has 8005 states and 12017 transitions. [2023-11-26 11:57:34,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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) [2023-11-26 11:57:34,679 INFO L276 IsEmpty]: Start isEmpty. Operand 8005 states and 12017 transitions. [2023-11-26 11:57:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-26 11:57:34,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:34,681 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] [2023-11-26 11:57:34,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 11:57:34,682 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:34,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:34,682 INFO L85 PathProgramCache]: Analyzing trace with hash -2055768005, now seen corresponding path program 1 times [2023-11-26 11:57:34,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:34,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967391211] [2023-11-26 11:57:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:34,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:34,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:34,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967391211] [2023-11-26 11:57:34,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967391211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:34,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:34,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:34,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329076962] [2023-11-26 11:57:34,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:34,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:34,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:34,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:34,799 INFO L87 Difference]: Start difference. First operand 8005 states and 12017 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:34,998 INFO L93 Difference]: Finished difference Result 11233 states and 16595 transitions. [2023-11-26 11:57:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:34,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2023-11-26 11:57:34,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:35,004 INFO L225 Difference]: With dead ends: 11233 [2023-11-26 11:57:35,004 INFO L226 Difference]: Without dead ends: 4783 [2023-11-26 11:57:35,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:35,011 INFO L413 NwaCegarLoop]: 1563 mSDtfsCounter, 41 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3073 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:35,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 3073 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2023-11-26 11:57:35,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4781. [2023-11-26 11:57:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4781 states, 4779 states have (on average 1.5461393596986817) internal successors, (7389), 4780 states have internal predecessors, (7389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4781 states to 4781 states and 7389 transitions. [2023-11-26 11:57:35,179 INFO L78 Accepts]: Start accepts. Automaton has 4781 states and 7389 transitions. Word has length 76 [2023-11-26 11:57:35,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:35,180 INFO L495 AbstractCegarLoop]: Abstraction has 4781 states and 7389 transitions. [2023-11-26 11:57:35,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:35,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4781 states and 7389 transitions. [2023-11-26 11:57:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-26 11:57:35,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:35,182 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] [2023-11-26 11:57:35,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 11:57:35,183 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:35,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:35,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1074221385, now seen corresponding path program 1 times [2023-11-26 11:57:35,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:35,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946842429] [2023-11-26 11:57:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:35,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:35,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:35,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946842429] [2023-11-26 11:57:35,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946842429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:35,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:35,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:35,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41360603] [2023-11-26 11:57:35,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:35,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:35,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:35,300 INFO L87 Difference]: Start difference. First operand 4781 states and 7389 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:35,388 INFO L93 Difference]: Finished difference Result 6397 states and 9653 transitions. [2023-11-26 11:57:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:35,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2023-11-26 11:57:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:35,392 INFO L225 Difference]: With dead ends: 6397 [2023-11-26 11:57:35,393 INFO L226 Difference]: Without dead ends: 3171 [2023-11-26 11:57:35,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:35,399 INFO L413 NwaCegarLoop]: 1556 mSDtfsCounter, 38 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3058 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:35,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3058 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2023-11-26 11:57:35,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 3169. [2023-11-26 11:57:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3169 states, 3167 states have (on average 1.6106725607830754) internal successors, (5101), 3168 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 5101 transitions. [2023-11-26 11:57:35,500 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 5101 transitions. Word has length 78 [2023-11-26 11:57:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:35,500 INFO L495 AbstractCegarLoop]: Abstraction has 3169 states and 5101 transitions. [2023-11-26 11:57:35,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 5101 transitions. [2023-11-26 11:57:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-26 11:57:35,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:35,503 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] [2023-11-26 11:57:35,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 11:57:35,503 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:35,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1531444265, now seen corresponding path program 1 times [2023-11-26 11:57:35,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:35,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106021352] [2023-11-26 11:57:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:35,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:35,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:35,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106021352] [2023-11-26 11:57:35,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106021352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:35,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:35,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256961944] [2023-11-26 11:57:35,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:35,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:35,635 INFO L87 Difference]: Start difference. First operand 3169 states and 5101 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:35,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:35,696 INFO L93 Difference]: Finished difference Result 3979 states and 6221 transitions. [2023-11-26 11:57:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2023-11-26 11:57:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:35,700 INFO L225 Difference]: With dead ends: 3979 [2023-11-26 11:57:35,700 INFO L226 Difference]: Without dead ends: 2365 [2023-11-26 11:57:35,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:35,703 INFO L413 NwaCegarLoop]: 1549 mSDtfsCounter, 35 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3043 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:35,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3043 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:35,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2023-11-26 11:57:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2363. [2023-11-26 11:57:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 2361 states have (on average 1.6814908936891149) internal successors, (3970), 2362 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 3970 transitions. [2023-11-26 11:57:35,763 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 3970 transitions. Word has length 80 [2023-11-26 11:57:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:35,764 INFO L495 AbstractCegarLoop]: Abstraction has 2363 states and 3970 transitions. [2023-11-26 11:57:35,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 3970 transitions. [2023-11-26 11:57:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-26 11:57:35,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:35,766 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] [2023-11-26 11:57:35,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-26 11:57:35,766 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:35,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:35,767 INFO L85 PathProgramCache]: Analyzing trace with hash 405696485, now seen corresponding path program 1 times [2023-11-26 11:57:35,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:35,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279200701] [2023-11-26 11:57:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:35,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:37,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:37,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279200701] [2023-11-26 11:57:37,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279200701] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:37,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941486541] [2023-11-26 11:57:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:37,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:37,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:37,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:37,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:57:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:37,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:57:37,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:37,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:57:37,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941486541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:37,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:37,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 4] total 18 [2023-11-26 11:57:37,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723184936] [2023-11-26 11:57:37,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:37,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:57:37,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:37,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:57:37,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:57:37,714 INFO L87 Difference]: Start difference. First operand 2363 states and 3970 transitions. Second operand has 18 states, 18 states have (on average 12.88888888888889) internal successors, (232), 18 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:40,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:40,889 INFO L93 Difference]: Finished difference Result 8864 states and 12692 transitions. [2023-11-26 11:57:40,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-26 11:57:40,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.88888888888889) internal successors, (232), 18 states have internal predecessors, (232), 0 states have call successors, (0), 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 82 [2023-11-26 11:57:40,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:40,898 INFO L225 Difference]: With dead ends: 8864 [2023-11-26 11:57:40,898 INFO L226 Difference]: Without dead ends: 8056 [2023-11-26 11:57:40,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=747, Invalid=3285, Unknown=0, NotChecked=0, Total=4032 [2023-11-26 11:57:40,902 INFO L413 NwaCegarLoop]: 1510 mSDtfsCounter, 14090 mSDsluCounter, 6347 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14090 SdHoareTripleChecker+Valid, 7857 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:40,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14090 Valid, 7857 Invalid, 876 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:57:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8056 states. [2023-11-26 11:57:41,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8056 to 7656. [2023-11-26 11:57:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7656 states, 7654 states have (on average 1.420825712045989) internal successors, (10875), 7655 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7656 states to 7656 states and 10875 transitions. [2023-11-26 11:57:41,221 INFO L78 Accepts]: Start accepts. Automaton has 7656 states and 10875 transitions. Word has length 82 [2023-11-26 11:57:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:41,222 INFO L495 AbstractCegarLoop]: Abstraction has 7656 states and 10875 transitions. [2023-11-26 11:57:41,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.88888888888889) internal successors, (232), 18 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:41,222 INFO L276 IsEmpty]: Start isEmpty. Operand 7656 states and 10875 transitions. [2023-11-26 11:57:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-26 11:57:41,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:41,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:41,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:41,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:41,433 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:41,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:41,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1767932817, now seen corresponding path program 1 times [2023-11-26 11:57:41,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:41,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041848573] [2023-11-26 11:57:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:41,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:41,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:41,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041848573] [2023-11-26 11:57:41,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041848573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:41,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858402207] [2023-11-26 11:57:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:41,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:41,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:41,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:41,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26acff0b-d0ad-4ea1-be72-566c81ab9b57/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:57:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:42,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:57:42,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:42,714 INFO L327 TraceCheckSpWp]: Computing backward predicates...