./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI --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 aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:40:23,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:40:23,084 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:40:23,090 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:40:23,091 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:40:23,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:40:23,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:40:23,119 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:40:23,119 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:40:23,120 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:40:23,120 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:40:23,121 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:40:23,122 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:40:23,122 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:40:23,123 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:40:23,124 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:40:23,124 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:40:23,125 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:40:23,125 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:40:23,126 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:40:23,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:40:23,127 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:40:23,128 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:40:23,128 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:40:23,129 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:40:23,129 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:40:23,130 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:40:23,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:40:23,131 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:40:23,131 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:40:23,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:40:23,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:40:23,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:40:23,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:40:23,134 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:40:23,134 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:40:23,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:40:23,135 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:40:23,135 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:40:23,155 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:40:23,156 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:40:23,156 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:40:23,156 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_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 [2023-11-24 21:40:23,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:40:23,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:40:23,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:40:23,509 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:40:23,509 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:40:23,510 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2018/Problem10.c [2023-11-24 21:40:26,684 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:40:26,978 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:40:26,978 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/sv-benchmarks/c/eca-rers2018/Problem10.c [2023-11-24 21:40:27,012 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/data/86332ca8d/d4351a975199460f991306c55b2ff02b/FLAG9e0d02828 [2023-11-24 21:40:27,027 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/data/86332ca8d/d4351a975199460f991306c55b2ff02b [2023-11-24 21:40:27,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:40:27,031 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:40:27,033 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:40:27,033 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:40:27,046 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:40:27,047 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:40:27" (1/1) ... [2023-11-24 21:40:27,048 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6165f0c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:27, skipping insertion in model container [2023-11-24 21:40:27,048 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:40:27" (1/1) ... [2023-11-24 21:40:27,128 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:40:27,274 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_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/sv-benchmarks/c/eca-rers2018/Problem10.c[778,791] [2023-11-24 21:40:27,280 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_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/sv-benchmarks/c/eca-rers2018/Problem10.c[817,830] [2023-11-24 21:40:27,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:40:27,809 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:40:27,821 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_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/sv-benchmarks/c/eca-rers2018/Problem10.c[778,791] [2023-11-24 21:40:27,822 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_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/sv-benchmarks/c/eca-rers2018/Problem10.c[817,830] [2023-11-24 21:40:27,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:40:28,068 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:40:28,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28 WrapperNode [2023-11-24 21:40:28,069 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:40:28,071 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:40:28,071 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:40:28,071 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:40:28,080 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (1/1) ... [2023-11-24 21:40:28,123 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (1/1) ... [2023-11-24 21:40:28,210 INFO L138 Inliner]: procedures = 274, calls = 248, calls flagged for inlining = 144, calls inlined = 144, statements flattened = 866 [2023-11-24 21:40:28,210 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:40:28,211 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:40:28,211 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:40:28,212 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:40:28,223 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (1/1) ... [2023-11-24 21:40:28,223 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (1/1) ... [2023-11-24 21:40:28,227 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (1/1) ... [2023-11-24 21:40:28,249 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]. [2023-11-24 21:40:28,249 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (1/1) ... [2023-11-24 21:40:28,250 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (1/1) ... [2023-11-24 21:40:28,271 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (1/1) ... [2023-11-24 21:40:28,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (1/1) ... [2023-11-24 21:40:28,301 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (1/1) ... [2023-11-24 21:40:28,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (1/1) ... [2023-11-24 21:40:28,313 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:40:28,316 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:40:28,316 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:40:28,316 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:40:28,317 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (1/1) ... [2023-11-24 21:40:28,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:40:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:40:28,355 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:40:28,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6ea308e-f3fa-45bc-a24b-e923b786f2a6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:40:28,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:40:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2023-11-24 21:40:28,389 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2023-11-24 21:40:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2023-11-24 21:40:28,389 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2023-11-24 21:40:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:40:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:40:28,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:40:28,504 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:40:28,507 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:40:29,685 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:40:29,742 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:40:29,742 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:40:29,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:40:29 BoogieIcfgContainer [2023-11-24 21:40:29,743 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:40:29,749 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:40:29,749 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:40:29,753 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:40:29,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:40:27" (1/3) ... [2023-11-24 21:40:29,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416e3fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:40:29, skipping insertion in model container [2023-11-24 21:40:29,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:40:28" (2/3) ... [2023-11-24 21:40:29,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@416e3fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:40:29, skipping insertion in model container [2023-11-24 21:40:29,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:40:29" (3/3) ... [2023-11-24 21:40:29,759 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10.c [2023-11-24 21:40:29,780 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:40:29,780 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 21:40:29,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:40:29,904 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;@15edac5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:40:29,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 21:40:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 463 states, 358 states have (on average 1.600558659217877) internal successors, (573), 360 states have internal predecessors, (573), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-24 21:40:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:40:29,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:29,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:29,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:29,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:29,931 INFO L85 PathProgramCache]: Analyzing trace with hash -973882549, now seen corresponding path program 1 times [2023-11-24 21:40:29,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:29,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177104111] [2023-11-24 21:40:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:29,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:30,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:30,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177104111] [2023-11-24 21:40:30,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177104111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:30,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:30,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:30,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779198239] [2023-11-24 21:40:30,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:30,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:40:30,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:30,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:40:30,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:40:30,381 INFO L87 Difference]: Start difference. First operand has 463 states, 358 states have (on average 1.600558659217877) internal successors, (573), 360 states have internal predecessors, (573), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:31,816 INFO L93 Difference]: Finished difference Result 1154 states and 2058 transitions. [2023-11-24 21:40:31,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:40:31,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 21:40:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:31,843 INFO L225 Difference]: With dead ends: 1154 [2023-11-24 21:40:31,843 INFO L226 Difference]: Without dead ends: 686 [2023-11-24 21:40:31,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:40:31,859 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 570 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:31,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 639 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 21:40:31,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-11-24 21:40:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 554. [2023-11-24 21:40:31,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 452 states have (on average 1.592920353982301) internal successors, (720), 551 states have internal predecessors, (720), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 820 transitions. [2023-11-24 21:40:31,981 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 820 transitions. Word has length 12 [2023-11-24 21:40:31,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:31,981 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 820 transitions. [2023-11-24 21:40:31,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 820 transitions. [2023-11-24 21:40:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 21:40:31,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:31,988 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] [2023-11-24 21:40:31,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:40:31,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:31,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:31,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1176212298, now seen corresponding path program 1 times [2023-11-24 21:40:31,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:31,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103514555] [2023-11-24 21:40:31,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:31,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:32,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:32,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103514555] [2023-11-24 21:40:32,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103514555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:32,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:32,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:32,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056681095] [2023-11-24 21:40:32,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:32,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:40:32,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:32,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:40:32,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:40:32,096 INFO L87 Difference]: Start difference. First operand 554 states and 820 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:33,012 INFO L93 Difference]: Finished difference Result 1696 states and 2574 transitions. [2023-11-24 21:40:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:40:33,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-24 21:40:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:33,020 INFO L225 Difference]: With dead ends: 1696 [2023-11-24 21:40:33,020 INFO L226 Difference]: Without dead ends: 1143 [2023-11-24 21:40:33,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:40:33,024 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 855 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:33,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1108 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:40:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2023-11-24 21:40:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 883. [2023-11-24 21:40:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 781 states have (on average 1.555697823303457) internal successors, (1215), 880 states have internal predecessors, (1215), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1315 transitions. [2023-11-24 21:40:33,069 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1315 transitions. Word has length 20 [2023-11-24 21:40:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:33,070 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1315 transitions. [2023-11-24 21:40:33,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1315 transitions. [2023-11-24 21:40:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:40:33,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:33,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:33,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:40:33,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:33,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:33,073 INFO L85 PathProgramCache]: Analyzing trace with hash 388531602, now seen corresponding path program 1 times [2023-11-24 21:40:33,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:33,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318478569] [2023-11-24 21:40:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:33,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:33,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:33,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318478569] [2023-11-24 21:40:33,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318478569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:33,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:33,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:33,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815829324] [2023-11-24 21:40:33,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:33,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:33,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:33,305 INFO L87 Difference]: Start difference. First operand 883 states and 1315 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:33,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:33,356 INFO L93 Difference]: Finished difference Result 1766 states and 2630 transitions. [2023-11-24 21:40:33,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:33,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-24 21:40:33,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:33,367 INFO L225 Difference]: With dead ends: 1766 [2023-11-24 21:40:33,367 INFO L226 Difference]: Without dead ends: 884 [2023-11-24 21:40:33,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:33,373 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 3 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:33,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1119 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:40:33,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2023-11-24 21:40:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 883. [2023-11-24 21:40:33,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 781 states have (on average 1.5544174135723432) internal successors, (1214), 880 states have internal predecessors, (1214), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1314 transitions. [2023-11-24 21:40:33,434 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1314 transitions. Word has length 23 [2023-11-24 21:40:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:33,435 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1314 transitions. [2023-11-24 21:40:33,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1314 transitions. [2023-11-24 21:40:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:40:33,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:33,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:33,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:40:33,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:33,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash 646697040, now seen corresponding path program 1 times [2023-11-24 21:40:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:33,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987475260] [2023-11-24 21:40:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:33,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:33,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987475260] [2023-11-24 21:40:33,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987475260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:33,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:33,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:33,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409615166] [2023-11-24 21:40:33,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:33,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:33,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:33,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:33,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:33,512 INFO L87 Difference]: Start difference. First operand 883 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:33,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:33,728 INFO L93 Difference]: Finished difference Result 2190 states and 3254 transitions. [2023-11-24 21:40:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:33,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-24 21:40:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:33,736 INFO L225 Difference]: With dead ends: 2190 [2023-11-24 21:40:33,736 INFO L226 Difference]: Without dead ends: 1308 [2023-11-24 21:40:33,739 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 [2023-11-24 21:40:33,745 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 532 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:33,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1373 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:40:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2023-11-24 21:40:33,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1224. [2023-11-24 21:40:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1122 states have (on average 1.552584670231729) internal successors, (1742), 1221 states have internal predecessors, (1742), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:33,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1842 transitions. [2023-11-24 21:40:33,795 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1842 transitions. Word has length 23 [2023-11-24 21:40:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:33,796 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1842 transitions. [2023-11-24 21:40:33,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:33,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1842 transitions. [2023-11-24 21:40:33,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:40:33,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:33,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:33,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:40:33,798 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:33,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:33,799 INFO L85 PathProgramCache]: Analyzing trace with hash -198274412, now seen corresponding path program 1 times [2023-11-24 21:40:33,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:33,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513219123] [2023-11-24 21:40:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:33,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:33,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:33,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513219123] [2023-11-24 21:40:33,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513219123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:33,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:33,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:33,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042044240] [2023-11-24 21:40:33,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:33,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:33,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:33,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:33,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:33,965 INFO L87 Difference]: Start difference. First operand 1224 states and 1842 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:34,589 INFO L93 Difference]: Finished difference Result 3151 states and 4814 transitions. [2023-11-24 21:40:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-24 21:40:34,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:34,601 INFO L225 Difference]: With dead ends: 3151 [2023-11-24 21:40:34,601 INFO L226 Difference]: Without dead ends: 1928 [2023-11-24 21:40:34,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:34,607 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 309 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:34,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 792 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:40:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2023-11-24 21:40:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1390. [2023-11-24 21:40:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1288 states have (on average 1.454192546583851) internal successors, (1873), 1387 states have internal predecessors, (1873), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1973 transitions. [2023-11-24 21:40:34,696 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1973 transitions. Word has length 23 [2023-11-24 21:40:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:34,697 INFO L495 AbstractCegarLoop]: Abstraction has 1390 states and 1973 transitions. [2023-11-24 21:40:34,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1973 transitions. [2023-11-24 21:40:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:40:34,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:34,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:34,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:40:34,699 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:34,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:34,700 INFO L85 PathProgramCache]: Analyzing trace with hash 502790166, now seen corresponding path program 1 times [2023-11-24 21:40:34,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:34,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550003830] [2023-11-24 21:40:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:34,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:34,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:34,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550003830] [2023-11-24 21:40:34,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550003830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:34,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:34,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:40:34,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015139666] [2023-11-24 21:40:34,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:34,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:34,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:34,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:34,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:34,762 INFO L87 Difference]: Start difference. First operand 1390 states and 1973 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:34,920 INFO L93 Difference]: Finished difference Result 4121 states and 5861 transitions. [2023-11-24 21:40:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-24 21:40:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:34,936 INFO L225 Difference]: With dead ends: 4121 [2023-11-24 21:40:34,936 INFO L226 Difference]: Without dead ends: 2732 [2023-11-24 21:40:34,941 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 [2023-11-24 21:40:34,944 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 509 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:34,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1067 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:40:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2023-11-24 21:40:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2644. [2023-11-24 21:40:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2542 states have (on average 1.43705743509048) internal successors, (3653), 2641 states have internal predecessors, (3653), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 3753 transitions. [2023-11-24 21:40:35,032 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 3753 transitions. Word has length 23 [2023-11-24 21:40:35,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:35,033 INFO L495 AbstractCegarLoop]: Abstraction has 2644 states and 3753 transitions. [2023-11-24 21:40:35,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:35,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 3753 transitions. [2023-11-24 21:40:35,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 21:40:35,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:35,034 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] [2023-11-24 21:40:35,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:40:35,034 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:35,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:35,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1594090992, now seen corresponding path program 1 times [2023-11-24 21:40:35,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:35,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440898670] [2023-11-24 21:40:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:35,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:35,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:35,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440898670] [2023-11-24 21:40:35,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440898670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:35,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:35,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:35,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080616452] [2023-11-24 21:40:35,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:35,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:35,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:35,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:35,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:35,092 INFO L87 Difference]: Start difference. First operand 2644 states and 3753 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:35,749 INFO L93 Difference]: Finished difference Result 6112 states and 8877 transitions. [2023-11-24 21:40:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:35,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-24 21:40:35,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:35,768 INFO L225 Difference]: With dead ends: 6112 [2023-11-24 21:40:35,769 INFO L226 Difference]: Without dead ends: 3469 [2023-11-24 21:40:35,773 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 [2023-11-24 21:40:35,774 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 229 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:35,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 713 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:40:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2023-11-24 21:40:35,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 3465. [2023-11-24 21:40:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3465 states, 3363 states have (on average 1.376746952126078) internal successors, (4630), 3462 states have internal predecessors, (4630), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 4730 transitions. [2023-11-24 21:40:35,935 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 4730 transitions. Word has length 24 [2023-11-24 21:40:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:35,936 INFO L495 AbstractCegarLoop]: Abstraction has 3465 states and 4730 transitions. [2023-11-24 21:40:35,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 4730 transitions. [2023-11-24 21:40:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 21:40:35,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:35,938 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] [2023-11-24 21:40:35,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:40:35,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:35,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1855904852, now seen corresponding path program 1 times [2023-11-24 21:40:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:35,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862419130] [2023-11-24 21:40:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:35,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:35,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:35,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862419130] [2023-11-24 21:40:35,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862419130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:35,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:35,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:35,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163229383] [2023-11-24 21:40:35,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:35,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:35,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:35,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:35,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:35,995 INFO L87 Difference]: Start difference. First operand 3465 states and 4730 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:36,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:36,699 INFO L93 Difference]: Finished difference Result 7770 states and 10847 transitions. [2023-11-24 21:40:36,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:36,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-24 21:40:36,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:36,722 INFO L225 Difference]: With dead ends: 7770 [2023-11-24 21:40:36,723 INFO L226 Difference]: Without dead ends: 4306 [2023-11-24 21:40:36,728 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 [2023-11-24 21:40:36,728 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 298 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:36,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 673 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:40:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2023-11-24 21:40:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 4302. [2023-11-24 21:40:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4302 states, 4200 states have (on average 1.355952380952381) internal successors, (5695), 4299 states have internal predecessors, (5695), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 5795 transitions. [2023-11-24 21:40:36,842 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 5795 transitions. Word has length 24 [2023-11-24 21:40:36,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:36,842 INFO L495 AbstractCegarLoop]: Abstraction has 4302 states and 5795 transitions. [2023-11-24 21:40:36,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:36,843 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 5795 transitions. [2023-11-24 21:40:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:40:36,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:36,846 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] [2023-11-24 21:40:36,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:40:36,846 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:36,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:36,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2122076635, now seen corresponding path program 1 times [2023-11-24 21:40:36,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:36,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350861850] [2023-11-24 21:40:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:36,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:36,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:36,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350861850] [2023-11-24 21:40:36,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350861850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:36,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:36,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:36,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50658754] [2023-11-24 21:40:36,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:36,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:36,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:36,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:36,906 INFO L87 Difference]: Start difference. First operand 4302 states and 5795 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:37,058 INFO L93 Difference]: Finished difference Result 8500 states and 11460 transitions. [2023-11-24 21:40:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:37,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-24 21:40:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:37,113 INFO L225 Difference]: With dead ends: 8500 [2023-11-24 21:40:37,113 INFO L226 Difference]: Without dead ends: 8493 [2023-11-24 21:40:37,116 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 [2023-11-24 21:40:37,118 INFO L413 NwaCegarLoop]: 999 mSDtfsCounter, 547 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:37,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1546 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:40:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8493 states. [2023-11-24 21:40:37,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8493 to 8392. [2023-11-24 21:40:37,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8392 states, 8290 states have (on average 1.351266586248492) internal successors, (11202), 8389 states have internal predecessors, (11202), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8392 states to 8392 states and 11302 transitions. [2023-11-24 21:40:37,333 INFO L78 Accepts]: Start accepts. Automaton has 8392 states and 11302 transitions. Word has length 25 [2023-11-24 21:40:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:37,334 INFO L495 AbstractCegarLoop]: Abstraction has 8392 states and 11302 transitions. [2023-11-24 21:40:37,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 8392 states and 11302 transitions. [2023-11-24 21:40:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:40:37,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:37,335 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] [2023-11-24 21:40:37,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:40:37,336 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:37,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:37,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1697765399, now seen corresponding path program 1 times [2023-11-24 21:40:37,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:37,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808291857] [2023-11-24 21:40:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:37,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:37,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:37,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808291857] [2023-11-24 21:40:37,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808291857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:37,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:37,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:40:37,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705183383] [2023-11-24 21:40:37,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:37,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:37,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:37,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:37,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:37,388 INFO L87 Difference]: Start difference. First operand 8392 states and 11302 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:37,589 INFO L93 Difference]: Finished difference Result 16882 states and 22700 transitions. [2023-11-24 21:40:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-24 21:40:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:37,616 INFO L225 Difference]: With dead ends: 16882 [2023-11-24 21:40:37,616 INFO L226 Difference]: Without dead ends: 8491 [2023-11-24 21:40:37,625 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 [2023-11-24 21:40:37,625 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 532 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:37,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 1203 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:40:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8491 states. [2023-11-24 21:40:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8491 to 8390. [2023-11-24 21:40:37,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8390 states, 8290 states have (on average 1.3462002412545235) internal successors, (11160), 8387 states have internal predecessors, (11160), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8390 states to 8390 states and 11258 transitions. [2023-11-24 21:40:37,855 INFO L78 Accepts]: Start accepts. Automaton has 8390 states and 11258 transitions. Word has length 25 [2023-11-24 21:40:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:37,856 INFO L495 AbstractCegarLoop]: Abstraction has 8390 states and 11258 transitions. [2023-11-24 21:40:37,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8390 states and 11258 transitions. [2023-11-24 21:40:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:40:37,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:37,857 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] [2023-11-24 21:40:37,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:40:37,858 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:37,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:37,859 INFO L85 PathProgramCache]: Analyzing trace with hash -816320605, now seen corresponding path program 1 times [2023-11-24 21:40:37,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:37,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629547377] [2023-11-24 21:40:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:37,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:37,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:37,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629547377] [2023-11-24 21:40:37,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629547377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:37,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:37,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:40:37,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42880540] [2023-11-24 21:40:37,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:37,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:37,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:37,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:37,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:37,919 INFO L87 Difference]: Start difference. First operand 8390 states and 11258 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:38,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:38,184 INFO L93 Difference]: Finished difference Result 24997 states and 33577 transitions. [2023-11-24 21:40:38,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:38,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-24 21:40:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:38,217 INFO L225 Difference]: With dead ends: 24997 [2023-11-24 21:40:38,217 INFO L226 Difference]: Without dead ends: 16608 [2023-11-24 21:40:38,228 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 [2023-11-24 21:40:38,228 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 525 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:38,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 1102 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:40:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16608 states. [2023-11-24 21:40:38,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16608 to 16510. [2023-11-24 21:40:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16510 states, 16410 states have (on average 1.3410115783059111) internal successors, (22006), 16507 states have internal predecessors, (22006), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16510 states to 16510 states and 22104 transitions. [2023-11-24 21:40:38,662 INFO L78 Accepts]: Start accepts. Automaton has 16510 states and 22104 transitions. Word has length 27 [2023-11-24 21:40:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:38,663 INFO L495 AbstractCegarLoop]: Abstraction has 16510 states and 22104 transitions. [2023-11-24 21:40:38,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 16510 states and 22104 transitions. [2023-11-24 21:40:38,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:40:38,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:38,664 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] [2023-11-24 21:40:38,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:40:38,665 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:38,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:38,665 INFO L85 PathProgramCache]: Analyzing trace with hash 682758120, now seen corresponding path program 1 times [2023-11-24 21:40:38,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:38,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351482551] [2023-11-24 21:40:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:38,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:38,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:38,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351482551] [2023-11-24 21:40:38,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351482551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:38,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:38,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:38,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643071438] [2023-11-24 21:40:38,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:38,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:38,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:38,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:38,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:38,729 INFO L87 Difference]: Start difference. First operand 16510 states and 22104 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:39,251 INFO L93 Difference]: Finished difference Result 47949 states and 64443 transitions. [2023-11-24 21:40:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:39,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-24 21:40:39,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:39,321 INFO L225 Difference]: With dead ends: 47949 [2023-11-24 21:40:39,321 INFO L226 Difference]: Without dead ends: 31440 [2023-11-24 21:40:39,340 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 [2023-11-24 21:40:39,341 INFO L413 NwaCegarLoop]: 852 mSDtfsCounter, 503 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:39,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1343 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:40:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31440 states. [2023-11-24 21:40:40,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31440 to 31351. [2023-11-24 21:40:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31351 states, 31251 states have (on average 1.3338133179738247) internal successors, (41683), 31348 states have internal predecessors, (41683), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:40,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31351 states to 31351 states and 41781 transitions. [2023-11-24 21:40:40,183 INFO L78 Accepts]: Start accepts. Automaton has 31351 states and 41781 transitions. Word has length 32 [2023-11-24 21:40:40,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:40,183 INFO L495 AbstractCegarLoop]: Abstraction has 31351 states and 41781 transitions. [2023-11-24 21:40:40,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:40,184 INFO L276 IsEmpty]: Start isEmpty. Operand 31351 states and 41781 transitions. [2023-11-24 21:40:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 21:40:40,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:40,185 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] [2023-11-24 21:40:40,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:40:40,185 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:40,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:40,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1918149547, now seen corresponding path program 1 times [2023-11-24 21:40:40,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:40,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121106639] [2023-11-24 21:40:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:40,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:40,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:40,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121106639] [2023-11-24 21:40:40,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121106639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:40,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:40,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:40,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120441537] [2023-11-24 21:40:40,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:40,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:40,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:40,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:40,237 INFO L87 Difference]: Start difference. First operand 31351 states and 41781 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:41,130 INFO L93 Difference]: Finished difference Result 72726 states and 96960 transitions. [2023-11-24 21:40:41,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:41,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-24 21:40:41,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:41,246 INFO L225 Difference]: With dead ends: 72726 [2023-11-24 21:40:41,247 INFO L226 Difference]: Without dead ends: 41376 [2023-11-24 21:40:41,272 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 [2023-11-24 21:40:41,273 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 481 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:41,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 959 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:40:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41376 states. [2023-11-24 21:40:41,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41376 to 41294. [2023-11-24 21:40:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41294 states, 41194 states have (on average 1.3173277661795406) internal successors, (54266), 41291 states have internal predecessors, (54266), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41294 states to 41294 states and 54364 transitions. [2023-11-24 21:40:42,117 INFO L78 Accepts]: Start accepts. Automaton has 41294 states and 54364 transitions. Word has length 33 [2023-11-24 21:40:42,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:42,118 INFO L495 AbstractCegarLoop]: Abstraction has 41294 states and 54364 transitions. [2023-11-24 21:40:42,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:42,118 INFO L276 IsEmpty]: Start isEmpty. Operand 41294 states and 54364 transitions. [2023-11-24 21:40:42,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-24 21:40:42,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:42,120 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] [2023-11-24 21:40:42,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:40:42,120 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:42,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:42,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1695664578, now seen corresponding path program 1 times [2023-11-24 21:40:42,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:42,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477609922] [2023-11-24 21:40:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:42,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:42,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:42,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477609922] [2023-11-24 21:40:42,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477609922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:42,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:42,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:42,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67457932] [2023-11-24 21:40:42,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:42,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:42,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:42,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:42,204 INFO L87 Difference]: Start difference. First operand 41294 states and 54364 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:43,247 INFO L93 Difference]: Finished difference Result 104785 states and 137715 transitions. [2023-11-24 21:40:43,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:43,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-24 21:40:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:43,401 INFO L225 Difference]: With dead ends: 104785 [2023-11-24 21:40:43,401 INFO L226 Difference]: Without dead ends: 63492 [2023-11-24 21:40:43,422 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 [2023-11-24 21:40:43,423 INFO L413 NwaCegarLoop]: 974 mSDtfsCounter, 439 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:43,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 1436 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:40:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63492 states. [2023-11-24 21:40:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63492 to 59564. [2023-11-24 21:40:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59564 states, 59464 states have (on average 1.2840542176779228) internal successors, (76355), 59561 states have internal predecessors, (76355), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59564 states to 59564 states and 76453 transitions. [2023-11-24 21:40:44,676 INFO L78 Accepts]: Start accepts. Automaton has 59564 states and 76453 transitions. Word has length 39 [2023-11-24 21:40:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:44,677 INFO L495 AbstractCegarLoop]: Abstraction has 59564 states and 76453 transitions. [2023-11-24 21:40:44,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:44,677 INFO L276 IsEmpty]: Start isEmpty. Operand 59564 states and 76453 transitions. [2023-11-24 21:40:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-24 21:40:44,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:44,883 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] [2023-11-24 21:40:44,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:40:44,884 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:44,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash 166601594, now seen corresponding path program 1 times [2023-11-24 21:40:44,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:44,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748727724] [2023-11-24 21:40:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:44,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:44,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:44,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748727724] [2023-11-24 21:40:44,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748727724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:44,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:44,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:40:44,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925627147] [2023-11-24 21:40:44,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:44,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:44,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:44,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:44,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:44,971 INFO L87 Difference]: Start difference. First operand 59564 states and 76453 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:46,193 INFO L93 Difference]: Finished difference Result 156090 states and 201786 transitions. [2023-11-24 21:40:46,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:46,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-24 21:40:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:46,394 INFO L225 Difference]: With dead ends: 156090 [2023-11-24 21:40:46,394 INFO L226 Difference]: Without dead ends: 96527 [2023-11-24 21:40:46,456 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 [2023-11-24 21:40:46,457 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 449 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:46,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 978 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:40:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96527 states. [2023-11-24 21:40:48,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96527 to 96448. [2023-11-24 21:40:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96448 states, 96348 states have (on average 1.276445800639349) internal successors, (122983), 96445 states have internal predecessors, (122983), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96448 states to 96448 states and 123081 transitions. [2023-11-24 21:40:48,341 INFO L78 Accepts]: Start accepts. Automaton has 96448 states and 123081 transitions. Word has length 39 [2023-11-24 21:40:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:48,341 INFO L495 AbstractCegarLoop]: Abstraction has 96448 states and 123081 transitions. [2023-11-24 21:40:48,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 96448 states and 123081 transitions. [2023-11-24 21:40:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 21:40:48,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:48,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:40:48,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:40:48,348 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:48,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:48,348 INFO L85 PathProgramCache]: Analyzing trace with hash -47031098, now seen corresponding path program 1 times [2023-11-24 21:40:48,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:48,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614246868] [2023-11-24 21:40:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:48,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:48,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:48,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614246868] [2023-11-24 21:40:48,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614246868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:48,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:48,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:48,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214667176] [2023-11-24 21:40:48,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:48,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:40:48,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:48,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:40:48,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:40:48,438 INFO L87 Difference]: Start difference. First operand 96448 states and 123081 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:49,372 INFO L93 Difference]: Finished difference Result 172891 states and 219988 transitions. [2023-11-24 21:40:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:40:49,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-11-24 21:40:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:49,601 INFO L225 Difference]: With dead ends: 172891 [2023-11-24 21:40:49,602 INFO L226 Difference]: Without dead ends: 172888 [2023-11-24 21:40:49,641 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 [2023-11-24 21:40:49,642 INFO L413 NwaCegarLoop]: 1030 mSDtfsCounter, 526 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:49,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1567 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:40:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172888 states. [2023-11-24 21:40:51,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172888 to 172668. [2023-11-24 21:40:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172668 states, 172568 states have (on average 1.2715393352185804) internal successors, (219427), 172665 states have internal predecessors, (219427), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172668 states to 172668 states and 219525 transitions. [2023-11-24 21:40:52,942 INFO L78 Accepts]: Start accepts. Automaton has 172668 states and 219525 transitions. Word has length 44 [2023-11-24 21:40:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:40:52,943 INFO L495 AbstractCegarLoop]: Abstraction has 172668 states and 219525 transitions. [2023-11-24 21:40:52,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 172668 states and 219525 transitions. [2023-11-24 21:40:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-24 21:40:52,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:40:52,948 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] [2023-11-24 21:40:52,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:40:52,949 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:40:52,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:40:52,949 INFO L85 PathProgramCache]: Analyzing trace with hash 2000323693, now seen corresponding path program 1 times [2023-11-24 21:40:52,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:40:52,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335592662] [2023-11-24 21:40:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:40:52,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:40:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:40:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:40:53,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:40:53,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335592662] [2023-11-24 21:40:53,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335592662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:40:53,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:40:53,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:40:53,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542798195] [2023-11-24 21:40:53,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:40:53,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:40:53,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:40:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:40:53,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:40:53,023 INFO L87 Difference]: Start difference. First operand 172668 states and 219525 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:40:55,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:40:55,655 INFO L93 Difference]: Finished difference Result 451351 states and 573250 transitions. [2023-11-24 21:40:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:40:55,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-24 21:40:55,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:40:56,523 INFO L225 Difference]: With dead ends: 451351 [2023-11-24 21:40:56,524 INFO L226 Difference]: Without dead ends: 278684 [2023-11-24 21:40:56,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:40:56,724 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 862 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:40:56,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 717 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:40:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278684 states. [2023-11-24 21:40:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278684 to 172663. [2023-11-24 21:41:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172663 states, 172568 states have (on average 1.2614563534374854) internal successors, (217687), 172660 states have internal predecessors, (217687), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172663 states to 172663 states and 217780 transitions. [2023-11-24 21:41:00,417 INFO L78 Accepts]: Start accepts. Automaton has 172663 states and 217780 transitions. Word has length 47 [2023-11-24 21:41:00,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:00,418 INFO L495 AbstractCegarLoop]: Abstraction has 172663 states and 217780 transitions. [2023-11-24 21:41:00,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:00,418 INFO L276 IsEmpty]: Start isEmpty. Operand 172663 states and 217780 transitions. [2023-11-24 21:41:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-24 21:41:00,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:00,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:00,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:41:00,420 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:41:00,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:00,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1428399207, now seen corresponding path program 1 times [2023-11-24 21:41:00,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:00,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555815508] [2023-11-24 21:41:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:00,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:00,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:00,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555815508] [2023-11-24 21:41:00,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555815508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:00,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:00,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:41:00,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882572151] [2023-11-24 21:41:00,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:00,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:00,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:00,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:00,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:00,486 INFO L87 Difference]: Start difference. First operand 172663 states and 217780 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:02,860 INFO L93 Difference]: Finished difference Result 341099 states and 430506 transitions. [2023-11-24 21:41:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:02,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-24 21:41:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:03,099 INFO L225 Difference]: With dead ends: 341099 [2023-11-24 21:41:03,099 INFO L226 Difference]: Without dead ends: 168437 [2023-11-24 21:41:03,157 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 [2023-11-24 21:41:03,158 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 387 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:03,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 355 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:41:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168437 states. [2023-11-24 21:41:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168437 to 89205. [2023-11-24 21:41:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89205 states, 89110 states have (on average 1.2030972954774997) internal successors, (107208), 89202 states have internal predecessors, (107208), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89205 states to 89205 states and 107301 transitions. [2023-11-24 21:41:05,427 INFO L78 Accepts]: Start accepts. Automaton has 89205 states and 107301 transitions. Word has length 57 [2023-11-24 21:41:05,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:05,428 INFO L495 AbstractCegarLoop]: Abstraction has 89205 states and 107301 transitions. [2023-11-24 21:41:05,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:05,428 INFO L276 IsEmpty]: Start isEmpty. Operand 89205 states and 107301 transitions. [2023-11-24 21:41:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-24 21:41:05,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:05,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:05,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:41:05,433 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:41:05,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:05,434 INFO L85 PathProgramCache]: Analyzing trace with hash -883141712, now seen corresponding path program 1 times [2023-11-24 21:41:05,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:05,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837147252] [2023-11-24 21:41:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:05,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:05,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:05,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837147252] [2023-11-24 21:41:05,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837147252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:05,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:05,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:41:05,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812820705] [2023-11-24 21:41:05,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:05,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:05,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:05,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:05,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:05,542 INFO L87 Difference]: Start difference. First operand 89205 states and 107301 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:06,650 INFO L93 Difference]: Finished difference Result 127428 states and 152501 transitions. [2023-11-24 21:41:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:06,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2023-11-24 21:41:06,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:06,836 INFO L225 Difference]: With dead ends: 127428 [2023-11-24 21:41:06,836 INFO L226 Difference]: Without dead ends: 127423 [2023-11-24 21:41:06,869 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 [2023-11-24 21:41:06,870 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 444 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:06,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1255 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:41:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127423 states. [2023-11-24 21:41:08,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127423 to 127210. [2023-11-24 21:41:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127210 states, 127115 states have (on average 1.1919757699720726) internal successors, (151518), 127207 states have internal predecessors, (151518), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127210 states to 127210 states and 151611 transitions. [2023-11-24 21:41:08,746 INFO L78 Accepts]: Start accepts. Automaton has 127210 states and 151611 transitions. Word has length 112 [2023-11-24 21:41:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:08,747 INFO L495 AbstractCegarLoop]: Abstraction has 127210 states and 151611 transitions. [2023-11-24 21:41:08,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 127210 states and 151611 transitions. [2023-11-24 21:41:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-24 21:41:08,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:08,750 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:41:08,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:41:08,751 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:41:08,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:08,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1720004066, now seen corresponding path program 1 times [2023-11-24 21:41:08,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:08,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538220608] [2023-11-24 21:41:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:08,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:41:08,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:08,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538220608] [2023-11-24 21:41:08,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538220608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:08,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:08,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:41:08,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709922778] [2023-11-24 21:41:08,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:08,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:08,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:08,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:08,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:08,864 INFO L87 Difference]: Start difference. First operand 127210 states and 151611 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:41:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:10,785 INFO L93 Difference]: Finished difference Result 273603 states and 330310 transitions. [2023-11-24 21:41:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2023-11-24 21:41:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:10,979 INFO L225 Difference]: With dead ends: 273603 [2023-11-24 21:41:10,979 INFO L226 Difference]: Without dead ends: 146514 [2023-11-24 21:41:11,052 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 [2023-11-24 21:41:11,053 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 321 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:11,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 512 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 21:41:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146514 states.