./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e7078db7101404701d1361cc736476696e00d8cbe0085be82e13ec1c6956c8c2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:48:55,866 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:48:55,937 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:48:55,942 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:48:55,943 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:48:55,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:48:55,971 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:48:55,972 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:48:55,973 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:48:55,974 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:48:55,974 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:48:55,975 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:48:55,976 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:48:55,976 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:48:55,977 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:48:55,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:48:55,978 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:48:55,979 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:48:55,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:48:55,980 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:48:55,980 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:48:55,981 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:48:55,982 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:48:55,982 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:48:55,983 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:48:55,983 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:48:55,984 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:48:55,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:48:55,985 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:48:55,985 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:48:55,986 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:48:55,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:48:55,986 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:48:55,987 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:48:55,987 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:48:55,987 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:48:55,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:48:55,988 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:48:55,988 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:48:55,988 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:48:55,989 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:48:55,989 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:48:55,989 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_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7078db7101404701d1361cc736476696e00d8cbe0085be82e13ec1c6956c8c2 [2023-11-26 11:48:56,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:48:56,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:48:56,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:48:56,255 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:48:56,255 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:48:56,256 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2023-11-26 11:48:59,495 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:48:59,803 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:48:59,804 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2023-11-26 11:48:59,826 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/data/ec4c50c44/74b7aa1361424a1a99e9afbf9c88e2b3/FLAG018f9f0e4 [2023-11-26 11:48:59,840 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/data/ec4c50c44/74b7aa1361424a1a99e9afbf9c88e2b3 [2023-11-26 11:48:59,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:48:59,845 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:48:59,846 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:48:59,847 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:48:59,856 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:48:59,857 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:59" (1/1) ... [2023-11-26 11:48:59,858 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f49852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:48:59, skipping insertion in model container [2023-11-26 11:48:59,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:48:59" (1/1) ... [2023-11-26 11:48:59,913 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:49:00,142 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_b7d26151-54b2-4243-b479-44edd13b9759/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c[15140,15153] [2023-11-26 11:49:00,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:49:00,159 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:49:00,245 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_b7d26151-54b2-4243-b479-44edd13b9759/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c[15140,15153] [2023-11-26 11:49:00,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:49:00,265 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:49:00,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00 WrapperNode [2023-11-26 11:49:00,266 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:49:00,267 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:49:00,268 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:49:00,268 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:49:00,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (1/1) ... [2023-11-26 11:49:00,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (1/1) ... [2023-11-26 11:49:00,339 INFO L138 Inliner]: procedures = 26, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 391 [2023-11-26 11:49:00,339 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:49:00,340 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:49:00,340 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:49:00,341 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:49:00,354 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (1/1) ... [2023-11-26 11:49:00,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (1/1) ... [2023-11-26 11:49:00,359 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (1/1) ... [2023-11-26 11:49:00,378 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:49:00,378 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (1/1) ... [2023-11-26 11:49:00,378 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (1/1) ... [2023-11-26 11:49:00,390 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (1/1) ... [2023-11-26 11:49:00,397 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (1/1) ... [2023-11-26 11:49:00,401 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (1/1) ... [2023-11-26 11:49:00,404 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (1/1) ... [2023-11-26 11:49:00,409 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:49:00,410 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:49:00,411 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:49:00,411 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:49:00,412 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (1/1) ... [2023-11-26 11:49:00,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:49:00,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:00,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:49:00,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:49:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:49:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:49:00,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:49:00,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:49:00,687 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:49:00,690 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:49:01,484 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:49:01,540 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:49:01,541 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:49:01,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:49:01 BoogieIcfgContainer [2023-11-26 11:49:01,542 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:49:01,545 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:49:01,545 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:49:01,549 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:49:01,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:48:59" (1/3) ... [2023-11-26 11:49:01,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b277e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:49:01, skipping insertion in model container [2023-11-26 11:49:01,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:00" (2/3) ... [2023-11-26 11:49:01,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b277e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:49:01, skipping insertion in model container [2023-11-26 11:49:01,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:49:01" (3/3) ... [2023-11-26 11:49:01,554 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2023-11-26 11:49:01,580 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:49:01,581 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:49:01,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:49:01,658 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3bbc8e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:49:01,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:49:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 93 states have (on average 1.8064516129032258) internal successors, (168), 94 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:01,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-26 11:49:01,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:01,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:01,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:01,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:01,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1995138295, now seen corresponding path program 1 times [2023-11-26 11:49:01,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:01,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990397578] [2023-11-26 11:49:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:01,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:02,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:02,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990397578] [2023-11-26 11:49:02,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990397578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:02,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:02,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:49:02,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891480201] [2023-11-26 11:49:02,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:02,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:49:02,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:02,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:49:02,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:49:02,152 INFO L87 Difference]: Start difference. First operand has 95 states, 93 states have (on average 1.8064516129032258) internal successors, (168), 94 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:02,207 INFO L93 Difference]: Finished difference Result 145 states and 251 transitions. [2023-11-26 11:49:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:49:02,210 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-26 11:49:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:02,221 INFO L225 Difference]: With dead ends: 145 [2023-11-26 11:49:02,222 INFO L226 Difference]: Without dead ends: 93 [2023-11-26 11:49:02,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:49:02,228 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:02,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 160 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-26 11:49:02,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-26 11:49:02,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.7717391304347827) internal successors, (163), 92 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 163 transitions. [2023-11-26 11:49:02,350 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 163 transitions. Word has length 22 [2023-11-26 11:49:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:02,356 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 163 transitions. [2023-11-26 11:49:02,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:02,356 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 163 transitions. [2023-11-26 11:49:02,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-26 11:49:02,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:02,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:02,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:49:02,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:02,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:02,360 INFO L85 PathProgramCache]: Analyzing trace with hash 610885259, now seen corresponding path program 1 times [2023-11-26 11:49:02,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:02,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651069466] [2023-11-26 11:49:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:02,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:02,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:02,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651069466] [2023-11-26 11:49:02,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651069466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:02,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:02,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:49:02,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823720455] [2023-11-26 11:49:02,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:02,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:49:02,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:02,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:49:02,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:49:02,640 INFO L87 Difference]: Start difference. First operand 93 states and 163 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:02,731 INFO L93 Difference]: Finished difference Result 145 states and 245 transitions. [2023-11-26 11:49:02,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:49:02,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-26 11:49:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:02,733 INFO L225 Difference]: With dead ends: 145 [2023-11-26 11:49:02,733 INFO L226 Difference]: Without dead ends: 93 [2023-11-26 11:49:02,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:49:02,736 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 0 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:02,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 437 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:49:02,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-26 11:49:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-26 11:49:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.3369565217391304) internal successors, (123), 92 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 123 transitions. [2023-11-26 11:49:02,747 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 123 transitions. Word has length 22 [2023-11-26 11:49:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:02,748 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 123 transitions. [2023-11-26 11:49:02,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 123 transitions. [2023-11-26 11:49:02,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-26 11:49:02,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:02,751 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] [2023-11-26 11:49:02,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:49:02,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:02,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:02,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1005779790, now seen corresponding path program 1 times [2023-11-26 11:49:02,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:02,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231530725] [2023-11-26 11:49:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:02,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:03,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:03,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231530725] [2023-11-26 11:49:03,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231530725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:03,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:03,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:49:03,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678017366] [2023-11-26 11:49:03,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:03,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:03,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:03,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:03,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:49:03,134 INFO L87 Difference]: Start difference. First operand 93 states and 123 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2023-11-26 11:49:03,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:03,654 INFO L93 Difference]: Finished difference Result 681 states and 1071 transitions. [2023-11-26 11:49:03,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:49:03,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 [2023-11-26 11:49:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:03,667 INFO L225 Difference]: With dead ends: 681 [2023-11-26 11:49:03,667 INFO L226 Difference]: Without dead ends: 632 [2023-11-26 11:49:03,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:49:03,674 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 1142 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:03,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 1849 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:49:03,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2023-11-26 11:49:03,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 140. [2023-11-26 11:49:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.4316546762589928) internal successors, (199), 139 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 199 transitions. [2023-11-26 11:49:03,737 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 199 transitions. Word has length 61 [2023-11-26 11:49:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:03,739 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 199 transitions. [2023-11-26 11:49:03,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2023-11-26 11:49:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 199 transitions. [2023-11-26 11:49:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 11:49:03,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:03,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:03,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:49:03,745 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:03,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash -571741034, now seen corresponding path program 1 times [2023-11-26 11:49:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:03,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383498295] [2023-11-26 11:49:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:03,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:04,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:04,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383498295] [2023-11-26 11:49:04,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383498295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:04,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:04,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:49:04,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789319732] [2023-11-26 11:49:04,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:04,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:04,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:49:04,255 INFO L87 Difference]: Start difference. First operand 140 states and 199 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:04,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:04,652 INFO L93 Difference]: Finished difference Result 238 states and 355 transitions. [2023-11-26 11:49:04,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:04,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2023-11-26 11:49:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:04,654 INFO L225 Difference]: With dead ends: 238 [2023-11-26 11:49:04,654 INFO L226 Difference]: Without dead ends: 142 [2023-11-26 11:49:04,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:49:04,661 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 370 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:04,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 485 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:49:04,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-26 11:49:04,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2023-11-26 11:49:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.4244604316546763) internal successors, (198), 139 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 198 transitions. [2023-11-26 11:49:04,676 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 198 transitions. Word has length 63 [2023-11-26 11:49:04,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:04,678 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 198 transitions. [2023-11-26 11:49:04,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 198 transitions. [2023-11-26 11:49:04,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-26 11:49:04,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:04,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:04,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:49:04,685 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:04,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:04,686 INFO L85 PathProgramCache]: Analyzing trace with hash -573885986, now seen corresponding path program 1 times [2023-11-26 11:49:04,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:04,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122653065] [2023-11-26 11:49:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:04,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:04,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:04,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122653065] [2023-11-26 11:49:04,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122653065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:04,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:04,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:04,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89745155] [2023-11-26 11:49:04,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:04,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:04,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:04,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:04,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:04,839 INFO L87 Difference]: Start difference. First operand 140 states and 198 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:04,873 INFO L93 Difference]: Finished difference Result 321 states and 487 transitions. [2023-11-26 11:49:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:04,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2023-11-26 11:49:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:04,876 INFO L225 Difference]: With dead ends: 321 [2023-11-26 11:49:04,876 INFO L226 Difference]: Without dead ends: 225 [2023-11-26 11:49:04,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:04,881 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 52 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:04,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 187 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:04,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-26 11:49:04,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 221. [2023-11-26 11:49:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.4772727272727273) internal successors, (325), 220 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2023-11-26 11:49:04,908 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 63 [2023-11-26 11:49:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:04,909 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2023-11-26 11:49:04,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2023-11-26 11:49:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-26 11:49:04,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:04,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:04,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:49:04,918 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:04,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:04,919 INFO L85 PathProgramCache]: Analyzing trace with hash -558175355, now seen corresponding path program 1 times [2023-11-26 11:49:04,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:04,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639194748] [2023-11-26 11:49:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:05,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:05,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639194748] [2023-11-26 11:49:05,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639194748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:05,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:05,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:49:05,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714323442] [2023-11-26 11:49:05,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:05,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:49:05,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:05,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:49:05,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:49:05,207 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:05,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:05,239 INFO L93 Difference]: Finished difference Result 229 states and 334 transitions. [2023-11-26 11:49:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:49:05,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-11-26 11:49:05,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:05,242 INFO L225 Difference]: With dead ends: 229 [2023-11-26 11:49:05,242 INFO L226 Difference]: Without dead ends: 227 [2023-11-26 11:49:05,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:49:05,244 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:05,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 349 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-26 11:49:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2023-11-26 11:49:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.4642857142857142) internal successors, (328), 224 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:05,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 328 transitions. [2023-11-26 11:49:05,255 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 328 transitions. Word has length 64 [2023-11-26 11:49:05,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:05,256 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 328 transitions. [2023-11-26 11:49:05,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:05,256 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 328 transitions. [2023-11-26 11:49:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-26 11:49:05,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:05,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:05,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:49:05,258 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:05,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:05,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1082045802, now seen corresponding path program 1 times [2023-11-26 11:49:05,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:05,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495930653] [2023-11-26 11:49:05,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:05,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:05,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:05,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495930653] [2023-11-26 11:49:05,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495930653] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:05,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:05,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:05,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404273195] [2023-11-26 11:49:05,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:05,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:05,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:05,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:05,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:05,362 INFO L87 Difference]: Start difference. First operand 225 states and 328 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:05,392 INFO L93 Difference]: Finished difference Result 571 states and 868 transitions. [2023-11-26 11:49:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:05,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-26 11:49:05,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:05,397 INFO L225 Difference]: With dead ends: 571 [2023-11-26 11:49:05,398 INFO L226 Difference]: Without dead ends: 390 [2023-11-26 11:49:05,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:05,403 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 67 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:05,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 258 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:05,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-26 11:49:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 388. [2023-11-26 11:49:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.496124031007752) internal successors, (579), 387 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:05,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 579 transitions. [2023-11-26 11:49:05,424 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 579 transitions. Word has length 65 [2023-11-26 11:49:05,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:05,425 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 579 transitions. [2023-11-26 11:49:05,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:05,426 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 579 transitions. [2023-11-26 11:49:05,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-26 11:49:05,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:05,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:05,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:49:05,428 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:05,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:05,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1350628970, now seen corresponding path program 1 times [2023-11-26 11:49:05,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:05,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643270218] [2023-11-26 11:49:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:05,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:05,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:05,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643270218] [2023-11-26 11:49:05,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643270218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:05,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:05,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:05,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608745970] [2023-11-26 11:49:05,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:05,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:05,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:05,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:05,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:05,532 INFO L87 Difference]: Start difference. First operand 388 states and 579 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:05,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:05,577 INFO L93 Difference]: Finished difference Result 1044 states and 1593 transitions. [2023-11-26 11:49:05,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:05,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-26 11:49:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:05,584 INFO L225 Difference]: With dead ends: 1044 [2023-11-26 11:49:05,584 INFO L226 Difference]: Without dead ends: 700 [2023-11-26 11:49:05,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:05,588 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 65 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:05,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 260 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:05,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2023-11-26 11:49:05,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 698. [2023-11-26 11:49:05,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 1.5050215208034434) internal successors, (1049), 697 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1049 transitions. [2023-11-26 11:49:05,630 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1049 transitions. Word has length 65 [2023-11-26 11:49:05,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:05,631 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 1049 transitions. [2023-11-26 11:49:05,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1049 transitions. [2023-11-26 11:49:05,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-26 11:49:05,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:05,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:05,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:49:05,633 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:05,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:05,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1936341098, now seen corresponding path program 1 times [2023-11-26 11:49:05,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:05,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317338327] [2023-11-26 11:49:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:05,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:05,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:05,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317338327] [2023-11-26 11:49:05,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317338327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:05,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:05,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:05,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552496791] [2023-11-26 11:49:05,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:05,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:05,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:05,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:05,719 INFO L87 Difference]: Start difference. First operand 698 states and 1049 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:05,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:05,776 INFO L93 Difference]: Finished difference Result 1942 states and 2947 transitions. [2023-11-26 11:49:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:05,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-26 11:49:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:05,784 INFO L225 Difference]: With dead ends: 1942 [2023-11-26 11:49:05,784 INFO L226 Difference]: Without dead ends: 1288 [2023-11-26 11:49:05,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:05,788 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 61 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:05,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 256 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2023-11-26 11:49:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1286. [2023-11-26 11:49:05,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 1.4980544747081712) internal successors, (1925), 1285 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1925 transitions. [2023-11-26 11:49:05,844 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1925 transitions. Word has length 65 [2023-11-26 11:49:05,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:05,844 INFO L495 AbstractCegarLoop]: Abstraction has 1286 states and 1925 transitions. [2023-11-26 11:49:05,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1925 transitions. [2023-11-26 11:49:05,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-26 11:49:05,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:05,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:05,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:49:05,851 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:05,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:05,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1047607658, now seen corresponding path program 1 times [2023-11-26 11:49:05,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:05,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100087061] [2023-11-26 11:49:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:05,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:05,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:05,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100087061] [2023-11-26 11:49:05,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100087061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:05,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:05,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:05,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535450601] [2023-11-26 11:49:05,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:05,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:05,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:05,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:05,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:05,917 INFO L87 Difference]: Start difference. First operand 1286 states and 1925 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:06,028 INFO L93 Difference]: Finished difference Result 3642 states and 5463 transitions. [2023-11-26 11:49:06,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:06,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-26 11:49:06,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:06,043 INFO L225 Difference]: With dead ends: 3642 [2023-11-26 11:49:06,043 INFO L226 Difference]: Without dead ends: 2400 [2023-11-26 11:49:06,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:06,046 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 59 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:06,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 258 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:06,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2023-11-26 11:49:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2398. [2023-11-26 11:49:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 1.4806007509386734) internal successors, (3549), 2397 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 3549 transitions. [2023-11-26 11:49:06,159 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 3549 transitions. Word has length 65 [2023-11-26 11:49:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:06,160 INFO L495 AbstractCegarLoop]: Abstraction has 2398 states and 3549 transitions. [2023-11-26 11:49:06,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:06,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 3549 transitions. [2023-11-26 11:49:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-26 11:49:06,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:06,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:06,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:49:06,162 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:06,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1310685034, now seen corresponding path program 1 times [2023-11-26 11:49:06,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:06,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204272193] [2023-11-26 11:49:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:06,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:06,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:06,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204272193] [2023-11-26 11:49:06,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204272193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:06,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:06,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:06,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892557098] [2023-11-26 11:49:06,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:06,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:06,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:06,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:06,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:06,229 INFO L87 Difference]: Start difference. First operand 2398 states and 3549 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:06,373 INFO L93 Difference]: Finished difference Result 6850 states and 10111 transitions. [2023-11-26 11:49:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:06,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-26 11:49:06,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:06,398 INFO L225 Difference]: With dead ends: 6850 [2023-11-26 11:49:06,398 INFO L226 Difference]: Without dead ends: 4496 [2023-11-26 11:49:06,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:06,402 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 63 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:06,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 262 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2023-11-26 11:49:06,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 4494. [2023-11-26 11:49:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4494 states, 4493 states have (on average 1.4558201647006455) internal successors, (6541), 4493 states have internal predecessors, (6541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4494 states to 4494 states and 6541 transitions. [2023-11-26 11:49:06,630 INFO L78 Accepts]: Start accepts. Automaton has 4494 states and 6541 transitions. Word has length 65 [2023-11-26 11:49:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:06,631 INFO L495 AbstractCegarLoop]: Abstraction has 4494 states and 6541 transitions. [2023-11-26 11:49:06,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4494 states and 6541 transitions. [2023-11-26 11:49:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-26 11:49:06,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:06,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:06,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:49:06,633 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:06,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:06,633 INFO L85 PathProgramCache]: Analyzing trace with hash -893356005, now seen corresponding path program 1 times [2023-11-26 11:49:06,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:06,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921453177] [2023-11-26 11:49:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:06,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:06,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:06,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921453177] [2023-11-26 11:49:06,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921453177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:06,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:06,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:06,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727169422] [2023-11-26 11:49:06,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:06,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:06,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:06,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:06,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:06,701 INFO L87 Difference]: Start difference. First operand 4494 states and 6541 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:06,907 INFO L93 Difference]: Finished difference Result 9109 states and 13395 transitions. [2023-11-26 11:49:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:06,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-26 11:49:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:06,943 INFO L225 Difference]: With dead ends: 9109 [2023-11-26 11:49:06,945 INFO L226 Difference]: Without dead ends: 6610 [2023-11-26 11:49:06,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:06,951 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 66 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:06,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 259 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6610 states. [2023-11-26 11:49:07,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6610 to 6608. [2023-11-26 11:49:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6608 states, 6607 states have (on average 1.4504313606780688) internal successors, (9583), 6607 states have internal predecessors, (9583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6608 states to 6608 states and 9583 transitions. [2023-11-26 11:49:07,291 INFO L78 Accepts]: Start accepts. Automaton has 6608 states and 9583 transitions. Word has length 67 [2023-11-26 11:49:07,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:07,291 INFO L495 AbstractCegarLoop]: Abstraction has 6608 states and 9583 transitions. [2023-11-26 11:49:07,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:07,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6608 states and 9583 transitions. [2023-11-26 11:49:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-26 11:49:07,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:07,295 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:07,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:49:07,295 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:07,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:07,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1835176170, now seen corresponding path program 1 times [2023-11-26 11:49:07,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:07,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103517675] [2023-11-26 11:49:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:07,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 11:49:07,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:07,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103517675] [2023-11-26 11:49:07,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103517675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:07,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:07,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:49:07,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664165308] [2023-11-26 11:49:07,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:07,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:07,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:07,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:07,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:49:07,572 INFO L87 Difference]: Start difference. First operand 6608 states and 9583 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:09,231 INFO L93 Difference]: Finished difference Result 47326 states and 68694 transitions. [2023-11-26 11:49:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 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 85 [2023-11-26 11:49:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:09,420 INFO L225 Difference]: With dead ends: 47326 [2023-11-26 11:49:09,420 INFO L226 Difference]: Without dead ends: 40764 [2023-11-26 11:49:09,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:49:09,440 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 910 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:09,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 1027 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:49:09,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40764 states. [2023-11-26 11:49:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40764 to 13168. [2023-11-26 11:49:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13168 states, 13167 states have (on average 1.4447482342219184) internal successors, (19023), 13167 states have internal predecessors, (19023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13168 states to 13168 states and 19023 transitions. [2023-11-26 11:49:10,853 INFO L78 Accepts]: Start accepts. Automaton has 13168 states and 19023 transitions. Word has length 85 [2023-11-26 11:49:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:10,854 INFO L495 AbstractCegarLoop]: Abstraction has 13168 states and 19023 transitions. [2023-11-26 11:49:10,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 13168 states and 19023 transitions. [2023-11-26 11:49:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-26 11:49:10,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:10,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:10,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 11:49:10,860 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:10,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2103759338, now seen corresponding path program 1 times [2023-11-26 11:49:10,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:10,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034118451] [2023-11-26 11:49:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:10,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:49:11,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:11,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034118451] [2023-11-26 11:49:11,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034118451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:11,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:11,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:49:11,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482706493] [2023-11-26 11:49:11,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:11,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:11,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:49:11,248 INFO L87 Difference]: Start difference. First operand 13168 states and 19023 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:13,252 INFO L93 Difference]: Finished difference Result 53886 states and 78134 transitions. [2023-11-26 11:49:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-26 11:49:13,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:13,475 INFO L225 Difference]: With dead ends: 53886 [2023-11-26 11:49:13,475 INFO L226 Difference]: Without dead ends: 47324 [2023-11-26 11:49:13,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:49:13,500 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 950 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:13,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 950 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:49:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47324 states. [2023-11-26 11:49:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47324 to 23024. [2023-11-26 11:49:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23024 states, 23023 states have (on average 1.4378230465186987) internal successors, (33103), 23023 states have internal predecessors, (33103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23024 states to 23024 states and 33103 transitions. [2023-11-26 11:49:15,124 INFO L78 Accepts]: Start accepts. Automaton has 23024 states and 33103 transitions. Word has length 85 [2023-11-26 11:49:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:15,125 INFO L495 AbstractCegarLoop]: Abstraction has 23024 states and 33103 transitions. [2023-11-26 11:49:15,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 23024 states and 33103 transitions. [2023-11-26 11:49:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-26 11:49:15,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:15,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:15,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-26 11:49:15,130 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:15,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:15,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1605495830, now seen corresponding path program 1 times [2023-11-26 11:49:15,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:15,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145163400] [2023-11-26 11:49:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:15,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:49:15,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:15,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145163400] [2023-11-26 11:49:15,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145163400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:15,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:15,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:49:15,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867750673] [2023-11-26 11:49:15,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:15,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:15,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:15,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:15,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:49:15,362 INFO L87 Difference]: Start difference. First operand 23024 states and 33103 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:17,437 INFO L93 Difference]: Finished difference Result 60446 states and 87574 transitions. [2023-11-26 11:49:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-26 11:49:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:17,560 INFO L225 Difference]: With dead ends: 60446 [2023-11-26 11:49:17,560 INFO L226 Difference]: Without dead ends: 53884 [2023-11-26 11:49:17,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:49:17,579 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 1021 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:17,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 961 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:49:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53884 states. [2023-11-26 11:49:18,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53884 to 29584. [2023-11-26 11:49:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29584 states, 29583 states have (on average 1.4380894432613325) internal successors, (42543), 29583 states have internal predecessors, (42543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29584 states to 29584 states and 42543 transitions. [2023-11-26 11:49:18,811 INFO L78 Accepts]: Start accepts. Automaton has 29584 states and 42543 transitions. Word has length 85 [2023-11-26 11:49:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:18,812 INFO L495 AbstractCegarLoop]: Abstraction has 29584 states and 42543 transitions. [2023-11-26 11:49:18,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 29584 states and 42543 transitions. [2023-11-26 11:49:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-26 11:49:18,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:18,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:18,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:49:18,817 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:18,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:18,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1800738026, now seen corresponding path program 1 times [2023-11-26 11:49:18,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:18,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089745603] [2023-11-26 11:49:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:18,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:49:19,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:19,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089745603] [2023-11-26 11:49:19,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089745603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:19,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:19,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:49:19,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156611931] [2023-11-26 11:49:19,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:19,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:19,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:19,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:19,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:49:19,299 INFO L87 Difference]: Start difference. First operand 29584 states and 42543 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:21,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:21,112 INFO L93 Difference]: Finished difference Result 67006 states and 97014 transitions. [2023-11-26 11:49:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:21,116 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-26 11:49:21,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:21,193 INFO L225 Difference]: With dead ends: 67006 [2023-11-26 11:49:21,193 INFO L226 Difference]: Without dead ends: 60444 [2023-11-26 11:49:21,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:49:21,212 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 936 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:21,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 985 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:49:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60444 states. [2023-11-26 11:49:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60444 to 36144. [2023-11-26 11:49:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36144 states, 36143 states have (on average 1.4382591373156628) internal successors, (51983), 36143 states have internal predecessors, (51983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36144 states to 36144 states and 51983 transitions. [2023-11-26 11:49:22,854 INFO L78 Accepts]: Start accepts. Automaton has 36144 states and 51983 transitions. Word has length 85 [2023-11-26 11:49:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:22,855 INFO L495 AbstractCegarLoop]: Abstraction has 36144 states and 51983 transitions. [2023-11-26 11:49:22,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:22,855 INFO L276 IsEmpty]: Start isEmpty. Operand 36144 states and 51983 transitions. [2023-11-26 11:49:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-26 11:49:22,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:22,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:22,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-26 11:49:22,860 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:22,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:22,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2063815402, now seen corresponding path program 1 times [2023-11-26 11:49:22,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:22,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966996662] [2023-11-26 11:49:22,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:22,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 11:49:23,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:23,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966996662] [2023-11-26 11:49:23,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966996662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:23,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:23,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:49:23,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630710389] [2023-11-26 11:49:23,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:23,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:23,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:23,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:23,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:49:23,116 INFO L87 Difference]: Start difference. First operand 36144 states and 51983 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:25,278 INFO L93 Difference]: Finished difference Result 73566 states and 106454 transitions. [2023-11-26 11:49:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:25,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-11-26 11:49:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:25,455 INFO L225 Difference]: With dead ends: 73566 [2023-11-26 11:49:25,455 INFO L226 Difference]: Without dead ends: 67004 [2023-11-26 11:49:25,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:49:25,470 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 848 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:25,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 1107 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:49:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67004 states. [2023-11-26 11:49:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67004 to 42704. [2023-11-26 11:49:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42704 states, 42703 states have (on average 1.4383766948457954) internal successors, (61423), 42703 states have internal predecessors, (61423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:27,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42704 states to 42704 states and 61423 transitions. [2023-11-26 11:49:27,113 INFO L78 Accepts]: Start accepts. Automaton has 42704 states and 61423 transitions. Word has length 85 [2023-11-26 11:49:27,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:27,113 INFO L495 AbstractCegarLoop]: Abstraction has 42704 states and 61423 transitions. [2023-11-26 11:49:27,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:27,114 INFO L276 IsEmpty]: Start isEmpty. Operand 42704 states and 61423 transitions. [2023-11-26 11:49:27,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-26 11:49:27,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:27,120 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:27,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-26 11:49:27,120 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:27,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:27,121 INFO L85 PathProgramCache]: Analyzing trace with hash 868781662, now seen corresponding path program 1 times [2023-11-26 11:49:27,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:27,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759801338] [2023-11-26 11:49:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:27,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:27,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:27,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759801338] [2023-11-26 11:49:27,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759801338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:27,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:27,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:27,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500605106] [2023-11-26 11:49:27,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:27,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:27,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:27,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:27,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:27,246 INFO L87 Difference]: Start difference. First operand 42704 states and 61423 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:28,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:28,462 INFO L93 Difference]: Finished difference Result 72681 states and 105127 transitions. [2023-11-26 11:49:28,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:28,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2023-11-26 11:49:28,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:28,509 INFO L225 Difference]: With dead ends: 72681 [2023-11-26 11:49:28,509 INFO L226 Difference]: Without dead ends: 30023 [2023-11-26 11:49:28,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:28,555 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 58 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:28,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 275 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30023 states. [2023-11-26 11:49:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30023 to 30021. [2023-11-26 11:49:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30021 states, 30020 states have (on average 1.4434377081945369) internal successors, (43332), 30020 states have internal predecessors, (43332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30021 states to 30021 states and 43332 transitions. [2023-11-26 11:49:29,781 INFO L78 Accepts]: Start accepts. Automaton has 30021 states and 43332 transitions. Word has length 87 [2023-11-26 11:49:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:29,782 INFO L495 AbstractCegarLoop]: Abstraction has 30021 states and 43332 transitions. [2023-11-26 11:49:29,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 30021 states and 43332 transitions. [2023-11-26 11:49:29,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-26 11:49:29,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:29,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:29,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 11:49:29,786 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:29,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1197833371, now seen corresponding path program 1 times [2023-11-26 11:49:29,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:29,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881175223] [2023-11-26 11:49:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:49:30,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:30,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881175223] [2023-11-26 11:49:30,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881175223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:30,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:30,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:49:30,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748398040] [2023-11-26 11:49:30,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:30,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:49:30,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:30,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:49:30,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:49:30,020 INFO L87 Difference]: Start difference. First operand 30021 states and 43332 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:31,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:31,881 INFO L93 Difference]: Finished difference Result 57683 states and 83659 transitions. [2023-11-26 11:49:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:31,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 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 87 [2023-11-26 11:49:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:31,940 INFO L225 Difference]: With dead ends: 57683 [2023-11-26 11:49:31,940 INFO L226 Difference]: Without dead ends: 53073 [2023-11-26 11:49:31,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:49:31,949 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 916 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:31,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 1175 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:49:31,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53073 states. [2023-11-26 11:49:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53073 to 34629. [2023-11-26 11:49:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34629 states, 34628 states have (on average 1.4435716761002657) internal successors, (49988), 34628 states have internal predecessors, (49988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34629 states to 34629 states and 49988 transitions. [2023-11-26 11:49:33,347 INFO L78 Accepts]: Start accepts. Automaton has 34629 states and 49988 transitions. Word has length 87 [2023-11-26 11:49:33,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:33,347 INFO L495 AbstractCegarLoop]: Abstraction has 34629 states and 49988 transitions. [2023-11-26 11:49:33,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 34629 states and 49988 transitions. [2023-11-26 11:49:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-26 11:49:33,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:33,351 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:33,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-26 11:49:33,352 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:33,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1191746063, now seen corresponding path program 1 times [2023-11-26 11:49:33,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:33,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679744068] [2023-11-26 11:49:33,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:33,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:33,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:33,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679744068] [2023-11-26 11:49:33,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679744068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:33,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:33,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:33,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277389749] [2023-11-26 11:49:33,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:33,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:33,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:33,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:33,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:33,477 INFO L87 Difference]: Start difference. First operand 34629 states and 49988 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:34,126 INFO L93 Difference]: Finished difference Result 51913 states and 74950 transitions. [2023-11-26 11:49:34,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:34,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-11-26 11:49:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:34,147 INFO L225 Difference]: With dead ends: 51913 [2023-11-26 11:49:34,147 INFO L226 Difference]: Without dead ends: 17351 [2023-11-26 11:49:34,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:34,165 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 53 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:34,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 260 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:34,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17351 states. [2023-11-26 11:49:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17351 to 17349. [2023-11-26 11:49:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17349 states, 17348 states have (on average 1.4288678810237492) internal successors, (24788), 17348 states have internal predecessors, (24788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17349 states to 17349 states and 24788 transitions. [2023-11-26 11:49:34,793 INFO L78 Accepts]: Start accepts. Automaton has 17349 states and 24788 transitions. Word has length 88 [2023-11-26 11:49:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:34,794 INFO L495 AbstractCegarLoop]: Abstraction has 17349 states and 24788 transitions. [2023-11-26 11:49:34,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 17349 states and 24788 transitions. [2023-11-26 11:49:34,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-26 11:49:34,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:34,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:34,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-26 11:49:34,797 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:34,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:34,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1897198243, now seen corresponding path program 1 times [2023-11-26 11:49:34,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:34,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300459437] [2023-11-26 11:49:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:34,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:34,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:34,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300459437] [2023-11-26 11:49:34,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300459437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:34,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:34,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:34,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400807004] [2023-11-26 11:49:34,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:34,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:34,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:34,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:34,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:34,918 INFO L87 Difference]: Start difference. First operand 17349 states and 24788 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:35,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:35,268 INFO L93 Difference]: Finished difference Result 25993 states and 37150 transitions. [2023-11-26 11:49:35,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:35,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2023-11-26 11:49:35,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:35,280 INFO L225 Difference]: With dead ends: 25993 [2023-11-26 11:49:35,280 INFO L226 Difference]: Without dead ends: 8711 [2023-11-26 11:49:35,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:35,290 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 50 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:35,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 245 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:35,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8711 states. [2023-11-26 11:49:35,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8711 to 8709. [2023-11-26 11:49:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8709 states, 8708 states have (on average 1.4134129536058797) internal successors, (12308), 8708 states have internal predecessors, (12308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8709 states to 8709 states and 12308 transitions. [2023-11-26 11:49:35,655 INFO L78 Accepts]: Start accepts. Automaton has 8709 states and 12308 transitions. Word has length 90 [2023-11-26 11:49:35,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:35,655 INFO L495 AbstractCegarLoop]: Abstraction has 8709 states and 12308 transitions. [2023-11-26 11:49:35,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 8709 states and 12308 transitions. [2023-11-26 11:49:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-26 11:49:35,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:35,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:35,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-26 11:49:35,658 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:35,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:35,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1756777003, now seen corresponding path program 1 times [2023-11-26 11:49:35,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:35,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124709954] [2023-11-26 11:49:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:35,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:35,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:35,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124709954] [2023-11-26 11:49:35,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124709954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:35,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:35,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:35,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7364271] [2023-11-26 11:49:35,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:35,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:35,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:35,915 INFO L87 Difference]: Start difference. First operand 8709 states and 12308 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:36,163 INFO L93 Difference]: Finished difference Result 13033 states and 18430 transitions. [2023-11-26 11:49:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:36,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2023-11-26 11:49:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:36,169 INFO L225 Difference]: With dead ends: 13033 [2023-11-26 11:49:36,170 INFO L226 Difference]: Without dead ends: 4391 [2023-11-26 11:49:36,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:36,177 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 47 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:36,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 230 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:36,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2023-11-26 11:49:36,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 4389. [2023-11-26 11:49:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4389 states, 4388 states have (on average 1.3965360072926163) internal successors, (6128), 4388 states have internal predecessors, (6128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 6128 transitions. [2023-11-26 11:49:36,396 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 6128 transitions. Word has length 92 [2023-11-26 11:49:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:36,397 INFO L495 AbstractCegarLoop]: Abstraction has 4389 states and 6128 transitions. [2023-11-26 11:49:36,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 6128 transitions. [2023-11-26 11:49:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-26 11:49:36,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:36,399 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:36,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-26 11:49:36,399 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:36,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:36,399 INFO L85 PathProgramCache]: Analyzing trace with hash 707997817, now seen corresponding path program 1 times [2023-11-26 11:49:36,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:36,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697428264] [2023-11-26 11:49:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:36,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:36,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:36,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697428264] [2023-11-26 11:49:36,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697428264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:36,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:36,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:36,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600243527] [2023-11-26 11:49:36,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:36,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:36,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:36,541 INFO L87 Difference]: Start difference. First operand 4389 states and 6128 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:36,668 INFO L93 Difference]: Finished difference Result 6553 states and 9160 transitions. [2023-11-26 11:49:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:36,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2023-11-26 11:49:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:36,672 INFO L225 Difference]: With dead ends: 6553 [2023-11-26 11:49:36,673 INFO L226 Difference]: Without dead ends: 2231 [2023-11-26 11:49:36,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:36,676 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 44 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:36,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 215 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2023-11-26 11:49:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2229. [2023-11-26 11:49:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2228 states have (on average 1.377019748653501) internal successors, (3068), 2228 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 3068 transitions. [2023-11-26 11:49:36,808 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 3068 transitions. Word has length 94 [2023-11-26 11:49:36,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:36,809 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 3068 transitions. [2023-11-26 11:49:36,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 3068 transitions. [2023-11-26 11:49:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-26 11:49:36,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:36,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:36,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-26 11:49:36,812 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:36,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:36,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1899847609, now seen corresponding path program 1 times [2023-11-26 11:49:36,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:36,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066745559] [2023-11-26 11:49:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:36,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:36,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:36,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066745559] [2023-11-26 11:49:36,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066745559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:36,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:36,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:36,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063614089] [2023-11-26 11:49:36,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:36,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:36,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:36,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:36,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:36,960 INFO L87 Difference]: Start difference. First operand 2229 states and 3068 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:37,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:37,032 INFO L93 Difference]: Finished difference Result 3313 states and 4570 transitions. [2023-11-26 11:49:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:37,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 96 [2023-11-26 11:49:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:37,034 INFO L225 Difference]: With dead ends: 3313 [2023-11-26 11:49:37,034 INFO L226 Difference]: Without dead ends: 1151 [2023-11-26 11:49:37,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:37,037 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 41 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:37,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 200 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:37,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2023-11-26 11:49:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1149. [2023-11-26 11:49:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 1.352787456445993) internal successors, (1553), 1148 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:37,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1553 transitions. [2023-11-26 11:49:37,106 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1553 transitions. Word has length 96 [2023-11-26 11:49:37,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:37,107 INFO L495 AbstractCegarLoop]: Abstraction has 1149 states and 1553 transitions. [2023-11-26 11:49:37,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:49:37,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1553 transitions. [2023-11-26 11:49:37,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-26 11:49:37,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:37,109 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:37,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-26 11:49:37,110 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:37,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:37,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2057471595, now seen corresponding path program 1 times [2023-11-26 11:49:37,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:37,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176177163] [2023-11-26 11:49:37,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:37,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:49:38,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:38,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176177163] [2023-11-26 11:49:38,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176177163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:49:38,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730960628] [2023-11-26 11:49:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:38,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:38,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:38,826 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:38,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d26151-54b2-4243-b479-44edd13b9759/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:49:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:38,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:49:38,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:49:39,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:49:39,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730960628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:39,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:49:39,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 16 [2023-11-26 11:49:39,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824375343] [2023-11-26 11:49:39,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:39,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:49:39,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:49:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:49:39,453 INFO L87 Difference]: Start difference. First operand 1149 states and 1553 transitions. Second operand has 16 states, 16 states have (on average 17.5625) internal successors, (281), 16 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)