./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 935656e2fd7f83fa1197920e6391ee831ebff85c688a5254e91079e29a430b75 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:40:47,861 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:40:47,999 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:40:48,009 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:40:48,010 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:40:48,056 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:40:48,057 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:40:48,058 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:40:48,059 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:40:48,064 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:40:48,065 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:40:48,065 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:40:48,066 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:40:48,068 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:40:48,068 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:40:48,069 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:40:48,069 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:40:48,070 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:40:48,070 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:40:48,071 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:40:48,071 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:40:48,072 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:40:48,072 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:40:48,073 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:40:48,073 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:40:48,074 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:40:48,074 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:40:48,075 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:40:48,075 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:40:48,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:40:48,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:40:48,078 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:40:48,078 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:40:48,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:40:48,078 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:40:48,079 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:40:48,079 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:40:48,079 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:40:48,079 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:40:48,080 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_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 935656e2fd7f83fa1197920e6391ee831ebff85c688a5254e91079e29a430b75 [2023-11-06 22:40:48,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:40:48,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:40:48,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:40:48,411 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:40:48,412 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:40:48,414 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2023-11-06 22:40:51,639 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:40:52,230 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:40:52,230 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2023-11-06 22:40:52,271 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/data/9a7518a40/d285b475d9c74e798b60d667beba7795/FLAG7708a1da6 [2023-11-06 22:40:52,293 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/data/9a7518a40/d285b475d9c74e798b60d667beba7795 [2023-11-06 22:40:52,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:40:52,301 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:40:52,303 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:40:52,303 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:40:52,309 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:40:52,310 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:52" (1/1) ... [2023-11-06 22:40:52,312 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec6d8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:52, skipping insertion in model container [2023-11-06 22:40:52,312 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:52" (1/1) ... [2023-11-06 22:40:52,510 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:40:52,989 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_b22f499d-813b-46d9-910f-d2148aa46e10/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[6524,6537] [2023-11-06 22:40:53,088 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_b22f499d-813b-46d9-910f-d2148aa46e10/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[13585,13598] [2023-11-06 22:40:54,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:40:54,216 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:40:54,268 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_b22f499d-813b-46d9-910f-d2148aa46e10/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[6524,6537] [2023-11-06 22:40:54,279 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_b22f499d-813b-46d9-910f-d2148aa46e10/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c[13585,13598] [2023-11-06 22:40:54,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:40:54,943 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:40:54,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54 WrapperNode [2023-11-06 22:40:54,945 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:40:54,947 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:40:54,947 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:40:54,947 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:40:54,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54" (1/1) ... [2023-11-06 22:40:55,040 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54" (1/1) ... [2023-11-06 22:40:55,534 INFO L138 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4977 [2023-11-06 22:40:55,534 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:40:55,535 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:40:55,535 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:40:55,535 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:40:55,546 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54" (1/1) ... [2023-11-06 22:40:55,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54" (1/1) ... [2023-11-06 22:40:55,628 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54" (1/1) ... [2023-11-06 22:40:55,629 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54" (1/1) ... [2023-11-06 22:40:55,794 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54" (1/1) ... [2023-11-06 22:40:55,830 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54" (1/1) ... [2023-11-06 22:40:55,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54" (1/1) ... [2023-11-06 22:40:55,875 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54" (1/1) ... [2023-11-06 22:40:56,037 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:40:56,038 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:40:56,038 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:40:56,039 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:40:56,040 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54" (1/1) ... [2023-11-06 22:40:56,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:40:56,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:56,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:40:56,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:40:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:40:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:40:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:40:56,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:40:56,354 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:40:56,357 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:41:02,888 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:41:02,908 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:41:02,908 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:41:02,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:02 BoogieIcfgContainer [2023-11-06 22:41:02,913 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:41:02,916 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:41:02,917 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:41:02,921 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:41:02,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:40:52" (1/3) ... [2023-11-06 22:41:02,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620ce8b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:02, skipping insertion in model container [2023-11-06 22:41:02,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:54" (2/3) ... [2023-11-06 22:41:02,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620ce8b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:02, skipping insertion in model container [2023-11-06 22:41:02,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:02" (3/3) ... [2023-11-06 22:41:02,924 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label04.c [2023-11-06 22:41:02,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:41:02,947 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-06 22:41:03,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:41:03,059 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=LoopsAndPotentialCycles, 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;@b73ab5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:41:03,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:41:03,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 872 states, 869 states have (on average 1.906789413118527) internal successors, (1657), 871 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:03,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:41:03,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:03,080 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] [2023-11-06 22:41:03,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:03,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:03,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1537187155, now seen corresponding path program 1 times [2023-11-06 22:41:03,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:03,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798583267] [2023-11-06 22:41:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:03,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:03,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:03,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798583267] [2023-11-06 22:41:03,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798583267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:03,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:03,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:03,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817702353] [2023-11-06 22:41:03,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:03,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:41:03,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:41:03,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:41:03,368 INFO L87 Difference]: Start difference. First operand has 872 states, 869 states have (on average 1.906789413118527) internal successors, (1657), 871 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:03,493 INFO L93 Difference]: Finished difference Result 1720 states and 3272 transitions. [2023-11-06 22:41:03,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:41:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-06 22:41:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:03,528 INFO L225 Difference]: With dead ends: 1720 [2023-11-06 22:41:03,528 INFO L226 Difference]: Without dead ends: 806 [2023-11-06 22:41:03,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:41:03,542 INFO L413 NwaCegarLoop]: 1588 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:03,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:41:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2023-11-06 22:41:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2023-11-06 22:41:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 804 states have (on average 1.8955223880597014) internal successors, (1524), 805 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1524 transitions. [2023-11-06 22:41:03,664 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1524 transitions. Word has length 20 [2023-11-06 22:41:03,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:03,664 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1524 transitions. [2023-11-06 22:41:03,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1524 transitions. [2023-11-06 22:41:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:41:03,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:03,668 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] [2023-11-06 22:41:03,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:41:03,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:03,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:03,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1746662891, now seen corresponding path program 1 times [2023-11-06 22:41:03,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:03,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430755997] [2023-11-06 22:41:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:03,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:03,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:03,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430755997] [2023-11-06 22:41:03,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430755997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:03,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:03,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:41:03,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861450621] [2023-11-06 22:41:03,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:03,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:41:03,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:41:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:41:03,932 INFO L87 Difference]: Start difference. First operand 806 states and 1524 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:04,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:04,106 INFO L93 Difference]: Finished difference Result 840 states and 1575 transitions. [2023-11-06 22:41:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:41:04,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-06 22:41:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:04,113 INFO L225 Difference]: With dead ends: 840 [2023-11-06 22:41:04,114 INFO L226 Difference]: Without dead ends: 806 [2023-11-06 22:41:04,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:41:04,116 INFO L413 NwaCegarLoop]: 1522 mSDtfsCounter, 2 mSDsluCounter, 4545 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6067 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:04,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6067 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:41:04,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2023-11-06 22:41:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2023-11-06 22:41:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 804 states have (on average 1.8756218905472637) internal successors, (1508), 805 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:04,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1508 transitions. [2023-11-06 22:41:04,145 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1508 transitions. Word has length 20 [2023-11-06 22:41:04,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:04,145 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1508 transitions. [2023-11-06 22:41:04,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:04,146 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1508 transitions. [2023-11-06 22:41:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 22:41:04,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:04,148 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] [2023-11-06 22:41:04,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:41:04,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:04,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:04,149 INFO L85 PathProgramCache]: Analyzing trace with hash 623816355, now seen corresponding path program 1 times [2023-11-06 22:41:04,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:04,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31171007] [2023-11-06 22:41:04,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:04,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:04,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:04,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31171007] [2023-11-06 22:41:04,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31171007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:04,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:04,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:41:04,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358169061] [2023-11-06 22:41:04,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:04,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:41:04,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:04,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:41:04,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:41:04,296 INFO L87 Difference]: Start difference. First operand 806 states and 1508 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:04,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:04,470 INFO L93 Difference]: Finished difference Result 986 states and 1790 transitions. [2023-11-06 22:41:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:41:04,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-06 22:41:04,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:04,478 INFO L225 Difference]: With dead ends: 986 [2023-11-06 22:41:04,478 INFO L226 Difference]: Without dead ends: 956 [2023-11-06 22:41:04,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:41:04,480 INFO L413 NwaCegarLoop]: 1504 mSDtfsCounter, 4589 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4589 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:04,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4589 Valid, 1865 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:41:04,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2023-11-06 22:41:04,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 834. [2023-11-06 22:41:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 832 states have (on average 1.8653846153846154) internal successors, (1552), 833 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1552 transitions. [2023-11-06 22:41:04,514 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1552 transitions. Word has length 35 [2023-11-06 22:41:04,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:04,515 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1552 transitions. [2023-11-06 22:41:04,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:04,515 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1552 transitions. [2023-11-06 22:41:04,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 22:41:04,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:04,518 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] [2023-11-06 22:41:04,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:41:04,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:04,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:04,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1071361683, now seen corresponding path program 1 times [2023-11-06 22:41:04,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:04,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146961946] [2023-11-06 22:41:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:04,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:04,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:04,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146961946] [2023-11-06 22:41:04,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146961946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:04,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:04,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:41:04,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985153191] [2023-11-06 22:41:04,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:04,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:04,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:04,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:04,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:04,622 INFO L87 Difference]: Start difference. First operand 834 states and 1552 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:04,677 INFO L93 Difference]: Finished difference Result 939 states and 1715 transitions. [2023-11-06 22:41:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:04,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-06 22:41:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:04,684 INFO L225 Difference]: With dead ends: 939 [2023-11-06 22:41:04,685 INFO L226 Difference]: Without dead ends: 881 [2023-11-06 22:41:04,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:04,687 INFO L413 NwaCegarLoop]: 1506 mSDtfsCounter, 1466 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:04,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1466 Valid, 1548 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:41:04,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2023-11-06 22:41:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 879. [2023-11-06 22:41:04,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 877 states have (on average 1.847206385404789) internal successors, (1620), 878 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1620 transitions. [2023-11-06 22:41:04,724 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1620 transitions. Word has length 37 [2023-11-06 22:41:04,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:04,725 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1620 transitions. [2023-11-06 22:41:04,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1620 transitions. [2023-11-06 22:41:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 22:41:04,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:04,728 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] [2023-11-06 22:41:04,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:41:04,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:04,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:04,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1137855195, now seen corresponding path program 1 times [2023-11-06 22:41:04,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:04,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899061159] [2023-11-06 22:41:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:04,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:04,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:04,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899061159] [2023-11-06 22:41:04,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899061159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:04,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:04,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:41:04,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709908340] [2023-11-06 22:41:04,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:04,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:41:04,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:04,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:41:04,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:41:04,957 INFO L87 Difference]: Start difference. First operand 879 states and 1620 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:05,093 INFO L93 Difference]: Finished difference Result 984 states and 1780 transitions. [2023-11-06 22:41:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:41:05,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-06 22:41:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:05,100 INFO L225 Difference]: With dead ends: 984 [2023-11-06 22:41:05,100 INFO L226 Difference]: Without dead ends: 881 [2023-11-06 22:41:05,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:41:05,103 INFO L413 NwaCegarLoop]: 1503 mSDtfsCounter, 2946 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2946 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:05,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2946 Valid, 1589 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:41:05,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2023-11-06 22:41:05,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 879. [2023-11-06 22:41:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 877 states have (on average 1.8449258836944127) internal successors, (1618), 878 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1618 transitions. [2023-11-06 22:41:05,144 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1618 transitions. Word has length 37 [2023-11-06 22:41:05,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:05,145 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1618 transitions. [2023-11-06 22:41:05,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1618 transitions. [2023-11-06 22:41:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-06 22:41:05,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:05,147 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] [2023-11-06 22:41:05,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:41:05,148 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:05,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash 499049456, now seen corresponding path program 1 times [2023-11-06 22:41:05,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:05,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474036098] [2023-11-06 22:41:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:05,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:05,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:05,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474036098] [2023-11-06 22:41:05,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474036098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:05,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:05,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:41:05,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138938901] [2023-11-06 22:41:05,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:05,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:41:05,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:05,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:41:05,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:41:05,441 INFO L87 Difference]: Start difference. First operand 879 states and 1618 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:05,654 INFO L93 Difference]: Finished difference Result 950 states and 1727 transitions. [2023-11-06 22:41:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:41:05,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-06 22:41:05,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:05,660 INFO L225 Difference]: With dead ends: 950 [2023-11-06 22:41:05,661 INFO L226 Difference]: Without dead ends: 948 [2023-11-06 22:41:05,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:41:05,663 INFO L413 NwaCegarLoop]: 1533 mSDtfsCounter, 91 mSDsluCounter, 9078 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 10611 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:05,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 10611 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:41:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2023-11-06 22:41:05,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 885. [2023-11-06 22:41:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 883 states have (on average 1.838052095130238) internal successors, (1623), 884 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1623 transitions. [2023-11-06 22:41:05,701 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1623 transitions. Word has length 38 [2023-11-06 22:41:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:05,701 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1623 transitions. [2023-11-06 22:41:05,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1623 transitions. [2023-11-06 22:41:05,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 22:41:05,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:05,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:05,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:41:05,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:05,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:05,704 INFO L85 PathProgramCache]: Analyzing trace with hash 166228827, now seen corresponding path program 1 times [2023-11-06 22:41:05,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:05,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311594275] [2023-11-06 22:41:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:05,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:05,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:05,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311594275] [2023-11-06 22:41:05,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311594275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:05,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:05,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:41:05,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791394001] [2023-11-06 22:41:05,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:05,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:05,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:05,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:05,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:05,787 INFO L87 Difference]: Start difference. First operand 885 states and 1623 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:05,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:05,840 INFO L93 Difference]: Finished difference Result 1007 states and 1804 transitions. [2023-11-06 22:41:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:05,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-06 22:41:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:05,848 INFO L225 Difference]: With dead ends: 1007 [2023-11-06 22:41:05,848 INFO L226 Difference]: Without dead ends: 943 [2023-11-06 22:41:05,849 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 [2023-11-06 22:41:05,852 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 1476 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:05,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1476 Valid, 1588 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:41:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-11-06 22:41:05,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 941. [2023-11-06 22:41:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 939 states have (on average 1.8146964856230032) internal successors, (1704), 940 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1704 transitions. [2023-11-06 22:41:05,897 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1704 transitions. Word has length 39 [2023-11-06 22:41:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:05,898 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1704 transitions. [2023-11-06 22:41:05,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1704 transitions. [2023-11-06 22:41:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 22:41:05,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:05,902 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] [2023-11-06 22:41:05,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:41:05,902 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:05,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:05,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2049239973, now seen corresponding path program 1 times [2023-11-06 22:41:05,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:05,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657383026] [2023-11-06 22:41:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:05,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:05,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657383026] [2023-11-06 22:41:05,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657383026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:05,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:05,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:41:05,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389004036] [2023-11-06 22:41:05,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:05,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:05,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:05,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:05,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:05,977 INFO L87 Difference]: Start difference. First operand 941 states and 1704 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:06,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:06,049 INFO L93 Difference]: Finished difference Result 1243 states and 2144 transitions. [2023-11-06 22:41:06,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:06,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-06 22:41:06,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:06,059 INFO L225 Difference]: With dead ends: 1243 [2023-11-06 22:41:06,059 INFO L226 Difference]: Without dead ends: 1080 [2023-11-06 22:41:06,060 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 [2023-11-06 22:41:06,062 INFO L413 NwaCegarLoop]: 1542 mSDtfsCounter, 1474 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:06,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1474 Valid, 1594 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:41:06,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2023-11-06 22:41:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1078. [2023-11-06 22:41:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1076 states have (on average 1.762081784386617) internal successors, (1896), 1077 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:06,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1896 transitions. [2023-11-06 22:41:06,132 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1896 transitions. Word has length 39 [2023-11-06 22:41:06,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:06,133 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 1896 transitions. [2023-11-06 22:41:06,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:06,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1896 transitions. [2023-11-06 22:41:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 22:41:06,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:06,134 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] [2023-11-06 22:41:06,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:41:06,135 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:06,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:06,135 INFO L85 PathProgramCache]: Analyzing trace with hash -268307109, now seen corresponding path program 1 times [2023-11-06 22:41:06,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:06,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990991517] [2023-11-06 22:41:06,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:06,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:06,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:06,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990991517] [2023-11-06 22:41:06,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990991517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:06,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:06,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:41:06,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193464214] [2023-11-06 22:41:06,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:06,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:06,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:06,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:06,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:06,202 INFO L87 Difference]: Start difference. First operand 1078 states and 1896 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:06,327 INFO L93 Difference]: Finished difference Result 1630 states and 2678 transitions. [2023-11-06 22:41:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:06,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-06 22:41:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:06,341 INFO L225 Difference]: With dead ends: 1630 [2023-11-06 22:41:06,341 INFO L226 Difference]: Without dead ends: 1330 [2023-11-06 22:41:06,342 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 [2023-11-06 22:41:06,345 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 1472 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1472 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:06,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1472 Valid, 1596 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:41:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2023-11-06 22:41:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1328. [2023-11-06 22:41:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1326 states have (on average 1.6832579185520362) internal successors, (2232), 1327 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 2232 transitions. [2023-11-06 22:41:06,477 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 2232 transitions. Word has length 39 [2023-11-06 22:41:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:06,478 INFO L495 AbstractCegarLoop]: Abstraction has 1328 states and 2232 transitions. [2023-11-06 22:41:06,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 2232 transitions. [2023-11-06 22:41:06,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 22:41:06,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:06,480 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:06,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:41:06,481 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:06,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:06,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1567417933, now seen corresponding path program 1 times [2023-11-06 22:41:06,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:06,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375141231] [2023-11-06 22:41:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:06,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:41:06,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:06,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375141231] [2023-11-06 22:41:06,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375141231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:06,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:06,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:41:06,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067393554] [2023-11-06 22:41:06,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:06,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:41:06,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:06,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:41:06,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:41:06,683 INFO L87 Difference]: Start difference. First operand 1328 states and 2232 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:07,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:07,076 INFO L93 Difference]: Finished difference Result 2960 states and 4508 transitions. [2023-11-06 22:41:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:41:07,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-06 22:41:07,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:07,092 INFO L225 Difference]: With dead ends: 2960 [2023-11-06 22:41:07,093 INFO L226 Difference]: Without dead ends: 2558 [2023-11-06 22:41:07,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:41:07,095 INFO L413 NwaCegarLoop]: 1548 mSDtfsCounter, 3039 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3039 SdHoareTripleChecker+Valid, 3160 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:07,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3039 Valid, 3160 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:41:07,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2023-11-06 22:41:07,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 1804. [2023-11-06 22:41:07,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1802 states have (on average 1.602663706992231) internal successors, (2888), 1803 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2888 transitions. [2023-11-06 22:41:07,288 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2888 transitions. Word has length 54 [2023-11-06 22:41:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:07,288 INFO L495 AbstractCegarLoop]: Abstraction has 1804 states and 2888 transitions. [2023-11-06 22:41:07,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2888 transitions. [2023-11-06 22:41:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 22:41:07,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:07,291 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:07,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:41:07,291 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:07,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:07,292 INFO L85 PathProgramCache]: Analyzing trace with hash -648050867, now seen corresponding path program 1 times [2023-11-06 22:41:07,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:07,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190359407] [2023-11-06 22:41:07,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:07,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:41:07,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:07,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190359407] [2023-11-06 22:41:07,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190359407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:07,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:07,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:41:07,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024333092] [2023-11-06 22:41:07,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:07,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:41:07,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:07,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:41:07,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:41:07,415 INFO L87 Difference]: Start difference. First operand 1804 states and 2888 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:07,916 INFO L93 Difference]: Finished difference Result 3508 states and 5268 transitions. [2023-11-06 22:41:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:41:07,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-06 22:41:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:07,935 INFO L225 Difference]: With dead ends: 3508 [2023-11-06 22:41:07,935 INFO L226 Difference]: Without dead ends: 2958 [2023-11-06 22:41:07,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:41:07,939 INFO L413 NwaCegarLoop]: 1547 mSDtfsCounter, 3039 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3039 SdHoareTripleChecker+Valid, 3157 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:07,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3039 Valid, 3157 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:41:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2023-11-06 22:41:08,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2552. [2023-11-06 22:41:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2550 states have (on average 1.5356862745098039) internal successors, (3916), 2551 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 3916 transitions. [2023-11-06 22:41:08,337 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 3916 transitions. Word has length 54 [2023-11-06 22:41:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:08,338 INFO L495 AbstractCegarLoop]: Abstraction has 2552 states and 3916 transitions. [2023-11-06 22:41:08,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 3916 transitions. [2023-11-06 22:41:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 22:41:08,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:08,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:08,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:41:08,341 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:08,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:08,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1132881997, now seen corresponding path program 1 times [2023-11-06 22:41:08,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:08,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919170030] [2023-11-06 22:41:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:08,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:41:08,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:08,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919170030] [2023-11-06 22:41:08,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919170030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:08,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:08,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:41:08,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756749961] [2023-11-06 22:41:08,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:08,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:41:08,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:41:08,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:41:08,480 INFO L87 Difference]: Start difference. First operand 2552 states and 3916 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:09,007 INFO L93 Difference]: Finished difference Result 4056 states and 6024 transitions. [2023-11-06 22:41:09,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:41:09,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-06 22:41:09,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:09,032 INFO L225 Difference]: With dead ends: 4056 [2023-11-06 22:41:09,033 INFO L226 Difference]: Without dead ends: 3506 [2023-11-06 22:41:09,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:41:09,036 INFO L413 NwaCegarLoop]: 1546 mSDtfsCounter, 3045 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3045 SdHoareTripleChecker+Valid, 3158 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:09,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3045 Valid, 3158 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:41:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2023-11-06 22:41:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 3100. [2023-11-06 22:41:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 3098 states have (on average 1.5080697224015494) internal successors, (4672), 3099 states have internal predecessors, (4672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 4672 transitions. [2023-11-06 22:41:09,457 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 4672 transitions. Word has length 54 [2023-11-06 22:41:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:09,458 INFO L495 AbstractCegarLoop]: Abstraction has 3100 states and 4672 transitions. [2023-11-06 22:41:09,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 4672 transitions. [2023-11-06 22:41:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 22:41:09,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:09,460 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:09,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:41:09,461 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:09,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1336470191, now seen corresponding path program 1 times [2023-11-06 22:41:09,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:09,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804981798] [2023-11-06 22:41:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:09,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:09,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:09,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804981798] [2023-11-06 22:41:09,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804981798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:09,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:09,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:41:09,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244991111] [2023-11-06 22:41:09,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:09,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:09,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:09,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:09,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:09,592 INFO L87 Difference]: Start difference. First operand 3100 states and 4672 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:09,958 INFO L93 Difference]: Finished difference Result 5424 states and 7882 transitions. [2023-11-06 22:41:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:09,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-06 22:41:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:09,979 INFO L225 Difference]: With dead ends: 5424 [2023-11-06 22:41:09,980 INFO L226 Difference]: Without dead ends: 3102 [2023-11-06 22:41:09,984 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 [2023-11-06 22:41:09,985 INFO L413 NwaCegarLoop]: 1526 mSDtfsCounter, 29 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3022 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:09,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3022 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:41:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2023-11-06 22:41:10,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 3100. [2023-11-06 22:41:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3100 states, 3098 states have (on average 1.4919302775984506) internal successors, (4622), 3099 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3100 states to 3100 states and 4622 transitions. [2023-11-06 22:41:10,407 INFO L78 Accepts]: Start accepts. Automaton has 3100 states and 4622 transitions. Word has length 55 [2023-11-06 22:41:10,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:10,408 INFO L495 AbstractCegarLoop]: Abstraction has 3100 states and 4622 transitions. [2023-11-06 22:41:10,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:10,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3100 states and 4622 transitions. [2023-11-06 22:41:10,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 22:41:10,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:10,410 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:10,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:41:10,410 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:10,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:10,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1355833083, now seen corresponding path program 1 times [2023-11-06 22:41:10,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:10,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943703991] [2023-11-06 22:41:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:10,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:10,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:10,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943703991] [2023-11-06 22:41:10,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943703991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:10,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:10,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:41:10,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810080614] [2023-11-06 22:41:10,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:10,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:10,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:10,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:10,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:10,507 INFO L87 Difference]: Start difference. First operand 3100 states and 4622 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:10,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:10,690 INFO L93 Difference]: Finished difference Result 4019 states and 5882 transitions. [2023-11-06 22:41:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:10,691 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-06 22:41:10,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:10,703 INFO L225 Difference]: With dead ends: 4019 [2023-11-06 22:41:10,704 INFO L226 Difference]: Without dead ends: 1697 [2023-11-06 22:41:10,707 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 [2023-11-06 22:41:10,708 INFO L413 NwaCegarLoop]: 1524 mSDtfsCounter, 23 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3019 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:10,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 3019 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:41:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2023-11-06 22:41:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1689. [2023-11-06 22:41:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1687 states have (on average 1.5986959098992295) internal successors, (2697), 1688 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2697 transitions. [2023-11-06 22:41:10,871 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2697 transitions. Word has length 56 [2023-11-06 22:41:10,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:10,871 INFO L495 AbstractCegarLoop]: Abstraction has 1689 states and 2697 transitions. [2023-11-06 22:41:10,872 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2697 transitions. [2023-11-06 22:41:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 22:41:10,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:10,873 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:10,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:41:10,874 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:10,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:10,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1597882527, now seen corresponding path program 1 times [2023-11-06 22:41:10,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:10,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147546392] [2023-11-06 22:41:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:10,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:10,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:10,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147546392] [2023-11-06 22:41:10,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147546392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:10,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:10,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:41:10,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922237607] [2023-11-06 22:41:10,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:10,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:10,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:10,968 INFO L87 Difference]: Start difference. First operand 1689 states and 2697 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:11,074 INFO L93 Difference]: Finished difference Result 2143 states and 3311 transitions. [2023-11-06 22:41:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:11,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-06 22:41:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:11,083 INFO L225 Difference]: With dead ends: 2143 [2023-11-06 22:41:11,084 INFO L226 Difference]: Without dead ends: 1241 [2023-11-06 22:41:11,086 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 [2023-11-06 22:41:11,086 INFO L413 NwaCegarLoop]: 1518 mSDtfsCounter, 25 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2998 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:11,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 2998 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:41:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2023-11-06 22:41:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1239. [2023-11-06 22:41:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1237 states have (on average 1.6782538399353275) internal successors, (2076), 1238 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:11,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 2076 transitions. [2023-11-06 22:41:11,200 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 2076 transitions. Word has length 57 [2023-11-06 22:41:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:11,200 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 2076 transitions. [2023-11-06 22:41:11,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:11,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 2076 transitions. [2023-11-06 22:41:11,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 22:41:11,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:11,204 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] [2023-11-06 22:41:11,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:41:11,204 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:11,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1649038701, now seen corresponding path program 1 times [2023-11-06 22:41:11,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:11,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138635797] [2023-11-06 22:41:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:14,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:14,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138635797] [2023-11-06 22:41:14,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138635797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:14,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250422742] [2023-11-06 22:41:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:14,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:14,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:14,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:15,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:41:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:15,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:41:15,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:41:15,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:41:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250422742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:15,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:15,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 4] total 19 [2023-11-06 22:41:15,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853310207] [2023-11-06 22:41:15,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:15,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:41:15,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:15,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:41:15,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:41:15,614 INFO L87 Difference]: Start difference. First operand 1239 states and 2076 transitions. Second operand has 19 states, 19 states have (on average 8.421052631578947) internal successors, (160), 19 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:20,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:20,560 INFO L93 Difference]: Finished difference Result 3519 states and 5009 transitions. [2023-11-06 22:41:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:41:20,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.421052631578947) internal successors, (160), 19 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-06 22:41:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:20,581 INFO L225 Difference]: With dead ends: 3519 [2023-11-06 22:41:20,587 INFO L226 Difference]: Without dead ends: 3067 [2023-11-06 22:41:20,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=692, Invalid=3090, Unknown=0, NotChecked=0, Total=3782 [2023-11-06 22:41:20,591 INFO L413 NwaCegarLoop]: 1499 mSDtfsCounter, 15343 mSDsluCounter, 7667 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15343 SdHoareTripleChecker+Valid, 9166 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:20,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15343 Valid, 9166 Invalid, 620 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:41:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2023-11-06 22:41:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2795. [2023-11-06 22:41:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2793 states have (on average 1.4375223773720014) internal successors, (4015), 2794 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 4015 transitions. [2023-11-06 22:41:21,020 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 4015 transitions. Word has length 59 [2023-11-06 22:41:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:21,021 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 4015 transitions. [2023-11-06 22:41:21,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.421052631578947) internal successors, (160), 19 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:21,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 4015 transitions. [2023-11-06 22:41:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-06 22:41:21,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:21,022 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-06 22:41:21,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:21,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:41:21,229 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:21,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:21,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1955522029, now seen corresponding path program 1 times [2023-11-06 22:41:21,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:21,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745621108] [2023-11-06 22:41:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:21,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:21,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:21,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745621108] [2023-11-06 22:41:21,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745621108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:21,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792264839] [2023-11-06 22:41:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:21,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:21,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:21,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:21,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:41:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:21,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:41:21,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:22,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:23,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792264839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:23,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:23,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 28 [2023-11-06 22:41:23,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959893639] [2023-11-06 22:41:23,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:23,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:41:23,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:41:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:41:23,798 INFO L87 Difference]: Start difference. First operand 2795 states and 4015 transitions. Second operand has 28 states, 28 states have (on average 5.5) internal successors, (154), 28 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:25,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:25,779 INFO L93 Difference]: Finished difference Result 6334 states and 8457 transitions. [2023-11-06 22:41:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:41:25,780 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.5) internal successors, (154), 28 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-06 22:41:25,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:25,792 INFO L225 Difference]: With dead ends: 6334 [2023-11-06 22:41:25,792 INFO L226 Difference]: Without dead ends: 4653 [2023-11-06 22:41:25,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 22:41:25,798 INFO L413 NwaCegarLoop]: 1491 mSDtfsCounter, 7673 mSDsluCounter, 4731 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7673 SdHoareTripleChecker+Valid, 6222 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:25,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7673 Valid, 6222 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:41:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4653 states. [2023-11-06 22:41:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4653 to 4443. [2023-11-06 22:41:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 4441 states have (on average 1.3686106732717855) internal successors, (6078), 4442 states have internal predecessors, (6078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 6078 transitions. [2023-11-06 22:41:26,510 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 6078 transitions. Word has length 60 [2023-11-06 22:41:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:26,511 INFO L495 AbstractCegarLoop]: Abstraction has 4443 states and 6078 transitions. [2023-11-06 22:41:26,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.5) internal successors, (154), 28 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 6078 transitions. [2023-11-06 22:41:26,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-06 22:41:26,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:26,513 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-06 22:41:26,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:41:26,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:41:26,719 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:26,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:26,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1417299731, now seen corresponding path program 1 times [2023-11-06 22:41:26,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:26,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31068181] [2023-11-06 22:41:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:26,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:27,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:27,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31068181] [2023-11-06 22:41:27,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31068181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:27,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603893361] [2023-11-06 22:41:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:27,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:27,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:27,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:27,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:41:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:27,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 22:41:27,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:28,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:31,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603893361] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:31,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:31,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 18] total 39 [2023-11-06 22:41:31,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875946635] [2023-11-06 22:41:31,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:31,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-06 22:41:31,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-06 22:41:31,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:41:31,808 INFO L87 Difference]: Start difference. First operand 4443 states and 6078 transitions. Second operand has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:41:38,851 INFO L93 Difference]: Finished difference Result 9954 states and 12989 transitions. [2023-11-06 22:41:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-06 22:41:38,851 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-06 22:41:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:41:38,867 INFO L225 Difference]: With dead ends: 9954 [2023-11-06 22:41:38,867 INFO L226 Difference]: Without dead ends: 6652 [2023-11-06 22:41:38,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3215 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2241, Invalid=8471, Unknown=0, NotChecked=0, Total=10712 [2023-11-06 22:41:38,877 INFO L413 NwaCegarLoop]: 1512 mSDtfsCounter, 12923 mSDsluCounter, 18197 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12923 SdHoareTripleChecker+Valid, 19709 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:41:38,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12923 Valid, 19709 Invalid, 1031 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [64 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:41:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6652 states. [2023-11-06 22:41:39,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6652 to 4617. [2023-11-06 22:41:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4617 states, 4615 states have (on average 1.3505958829902491) internal successors, (6233), 4616 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:39,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4617 states to 4617 states and 6233 transitions. [2023-11-06 22:41:39,762 INFO L78 Accepts]: Start accepts. Automaton has 4617 states and 6233 transitions. Word has length 60 [2023-11-06 22:41:39,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:41:39,763 INFO L495 AbstractCegarLoop]: Abstraction has 4617 states and 6233 transitions. [2023-11-06 22:41:39,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:41:39,763 INFO L276 IsEmpty]: Start isEmpty. Operand 4617 states and 6233 transitions. [2023-11-06 22:41:39,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 22:41:39,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:41:39,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:39,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:41:39,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:41:39,971 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:39,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:39,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1824096789, now seen corresponding path program 1 times [2023-11-06 22:41:39,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:39,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058913862] [2023-11-06 22:41:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:39,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:42,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:42,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058913862] [2023-11-06 22:41:42,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058913862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:42,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320059352] [2023-11-06 22:41:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:42,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:42,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:42,111 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:42,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:41:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:42,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:41:42,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:44,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:45,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320059352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:45,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:45,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 14] total 41 [2023-11-06 22:41:45,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220059170] [2023-11-06 22:41:45,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:45,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 22:41:45,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:45,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 22:41:45,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:41:45,024 INFO L87 Difference]: Start difference. First operand 4617 states and 6233 transitions. Second operand has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 41 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:07,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:07,057 INFO L93 Difference]: Finished difference Result 17375 states and 21738 transitions. [2023-11-06 22:42:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-11-06 22:42:07,057 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 41 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-06 22:42:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:07,089 INFO L225 Difference]: With dead ends: 17375 [2023-11-06 22:42:07,089 INFO L226 Difference]: Without dead ends: 15625 [2023-11-06 22:42:07,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10715 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=6313, Invalid=21743, Unknown=0, NotChecked=0, Total=28056 [2023-11-06 22:42:07,103 INFO L413 NwaCegarLoop]: 1544 mSDtfsCounter, 18671 mSDsluCounter, 23905 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18671 SdHoareTripleChecker+Valid, 25449 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:07,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18671 Valid, 25449 Invalid, 2347 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [149 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-06 22:42:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15625 states. [2023-11-06 22:42:09,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15625 to 6867. [2023-11-06 22:42:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6867 states, 6865 states have (on average 1.313182811361981) internal successors, (9015), 6866 states have internal predecessors, (9015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6867 states to 6867 states and 9015 transitions. [2023-11-06 22:42:09,361 INFO L78 Accepts]: Start accepts. Automaton has 6867 states and 9015 transitions. Word has length 61 [2023-11-06 22:42:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:09,362 INFO L495 AbstractCegarLoop]: Abstraction has 6867 states and 9015 transitions. [2023-11-06 22:42:09,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 41 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 6867 states and 9015 transitions. [2023-11-06 22:42:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 22:42:09,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:09,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:09,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:09,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:09,570 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:09,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:09,570 INFO L85 PathProgramCache]: Analyzing trace with hash 844958115, now seen corresponding path program 1 times [2023-11-06 22:42:09,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:09,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93077251] [2023-11-06 22:42:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:09,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:10,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:10,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93077251] [2023-11-06 22:42:10,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93077251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:10,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959651520] [2023-11-06 22:42:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:10,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:10,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:10,059 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:10,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:42:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:10,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:42:10,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:10,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:11,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959651520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:11,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:11,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2023-11-06 22:42:11,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964698172] [2023-11-06 22:42:11,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:11,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:42:11,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:11,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:42:11,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:42:11,822 INFO L87 Difference]: Start difference. First operand 6867 states and 9015 transitions. Second operand has 28 states, 28 states have (on average 5.678571428571429) internal successors, (159), 28 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:16,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:16,259 INFO L93 Difference]: Finished difference Result 15921 states and 20144 transitions. [2023-11-06 22:42:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:42:16,259 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.678571428571429) internal successors, (159), 28 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-06 22:42:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:16,281 INFO L225 Difference]: With dead ends: 15921 [2023-11-06 22:42:16,281 INFO L226 Difference]: Without dead ends: 10221 [2023-11-06 22:42:16,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=503, Invalid=1659, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:42:16,290 INFO L413 NwaCegarLoop]: 1498 mSDtfsCounter, 10529 mSDsluCounter, 6387 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10529 SdHoareTripleChecker+Valid, 7885 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:16,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10529 Valid, 7885 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:42:16,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10221 states. [2023-11-06 22:42:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10221 to 6867. [2023-11-06 22:42:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6867 states, 6865 states have (on average 1.2977421704297158) internal successors, (8909), 6866 states have internal predecessors, (8909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:18,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6867 states to 6867 states and 8909 transitions. [2023-11-06 22:42:18,664 INFO L78 Accepts]: Start accepts. Automaton has 6867 states and 8909 transitions. Word has length 61 [2023-11-06 22:42:18,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:18,665 INFO L495 AbstractCegarLoop]: Abstraction has 6867 states and 8909 transitions. [2023-11-06 22:42:18,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.678571428571429) internal successors, (159), 28 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:18,665 INFO L276 IsEmpty]: Start isEmpty. Operand 6867 states and 8909 transitions. [2023-11-06 22:42:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 22:42:18,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:18,667 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] [2023-11-06 22:42:18,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:18,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:18,873 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:18,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1104925612, now seen corresponding path program 1 times [2023-11-06 22:42:18,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:18,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365756175] [2023-11-06 22:42:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:18,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:19,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:19,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365756175] [2023-11-06 22:42:19,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365756175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:19,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:19,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:42:19,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445345390] [2023-11-06 22:42:19,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:19,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:42:19,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:42:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:42:19,087 INFO L87 Difference]: Start difference. First operand 6867 states and 8909 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:29,768 INFO L93 Difference]: Finished difference Result 9122 states and 13218 transitions. [2023-11-06 22:42:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:42:29,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-06 22:42:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:29,784 INFO L225 Difference]: With dead ends: 9122 [2023-11-06 22:42:29,784 INFO L226 Difference]: Without dead ends: 8369 [2023-11-06 22:42:29,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:42:29,788 INFO L413 NwaCegarLoop]: 744 mSDtfsCounter, 2329 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 6507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1153 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:29,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2329 Valid, 762 Invalid, 6507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1153 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2023-11-06 22:42:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8369 states. [2023-11-06 22:42:32,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8369 to 8369. [2023-11-06 22:42:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8369 states, 8367 states have (on average 1.3174375522887534) internal successors, (11023), 8368 states have internal predecessors, (11023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8369 states to 8369 states and 11023 transitions. [2023-11-06 22:42:32,139 INFO L78 Accepts]: Start accepts. Automaton has 8369 states and 11023 transitions. Word has length 61 [2023-11-06 22:42:32,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:32,139 INFO L495 AbstractCegarLoop]: Abstraction has 8369 states and 11023 transitions. [2023-11-06 22:42:32,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:32,140 INFO L276 IsEmpty]: Start isEmpty. Operand 8369 states and 11023 transitions. [2023-11-06 22:42:32,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-06 22:42:32,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:32,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:32,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-06 22:42:32,141 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:32,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash -747428819, now seen corresponding path program 1 times [2023-11-06 22:42:32,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:32,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246623851] [2023-11-06 22:42:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:32,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:33,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:33,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246623851] [2023-11-06 22:42:33,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246623851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595865673] [2023-11-06 22:42:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:33,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:33,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:33,913 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:33,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:42:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:34,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:42:34,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:35,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:36,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595865673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:36,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:36,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 13] total 43 [2023-11-06 22:42:36,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657834751] [2023-11-06 22:42:36,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:36,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 22:42:36,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:36,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 22:42:36,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 22:42:36,679 INFO L87 Difference]: Start difference. First operand 8369 states and 11023 transitions. Second operand has 43 states, 43 states have (on average 3.744186046511628) internal successors, (161), 43 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:54,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:42:54,525 INFO L93 Difference]: Finished difference Result 17801 states and 22599 transitions. [2023-11-06 22:42:54,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-06 22:42:54,528 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.744186046511628) internal successors, (161), 43 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-06 22:42:54,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:42:54,547 INFO L225 Difference]: With dead ends: 17801 [2023-11-06 22:42:54,547 INFO L226 Difference]: Without dead ends: 14674 [2023-11-06 22:42:54,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3933 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=3082, Invalid=10490, Unknown=0, NotChecked=0, Total=13572 [2023-11-06 22:42:54,558 INFO L413 NwaCegarLoop]: 1538 mSDtfsCounter, 15532 mSDsluCounter, 27502 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15532 SdHoareTripleChecker+Valid, 29040 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:42:54,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15532 Valid, 29040 Invalid, 1612 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [98 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:42:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14674 states. [2023-11-06 22:42:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14674 to 8470. [2023-11-06 22:42:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8470 states, 8468 states have (on average 1.3161313179026926) internal successors, (11145), 8469 states have internal predecessors, (11145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8470 states to 8470 states and 11145 transitions. [2023-11-06 22:42:57,366 INFO L78 Accepts]: Start accepts. Automaton has 8470 states and 11145 transitions. Word has length 62 [2023-11-06 22:42:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:42:57,367 INFO L495 AbstractCegarLoop]: Abstraction has 8470 states and 11145 transitions. [2023-11-06 22:42:57,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.744186046511628) internal successors, (161), 43 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:42:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 8470 states and 11145 transitions. [2023-11-06 22:42:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-06 22:42:57,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:42:57,370 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:57,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:57,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:57,576 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:42:57,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:57,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1960996049, now seen corresponding path program 1 times [2023-11-06 22:42:57,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:57,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870760875] [2023-11-06 22:42:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:57,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 34 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:58,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:58,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870760875] [2023-11-06 22:42:58,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870760875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:58,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451581955] [2023-11-06 22:42:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:58,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:58,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:58,788 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:58,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f499d-813b-46d9-910f-d2148aa46e10/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:42:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:58,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:42:58,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:00,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:06,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451581955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:06,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:43:06,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 51 [2023-11-06 22:43:06,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106502677] [2023-11-06 22:43:06,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:06,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-06 22:43:06,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:43:06,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-06 22:43:06,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2351, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 22:43:06,109 INFO L87 Difference]: Start difference. First operand 8470 states and 11145 transitions. Second operand has 51 states, 51 states have (on average 5.254901960784314) internal successors, (268), 51 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)